Asphalt crumb. Recycling Old Asphalt: Features of Different Pavement Recycling Methods Pros and Cons of Using Asphalt Crumbs

Asphalt (asphalt) chips are recycled asphalt. The crumb looks like crushed stone, it is used for filling the road, parking, areas. Asphalt crumbs are obtained by cutting off the asphalt pavement using a road milling machine. Particles of bitumen, which are present in asphalt chips, make the surface stronger after compaction. Due to the large amount of bitumen and crushed stone in the crumb composition, it rolls very well with a road roller, vibrating plate or car wheels. A road, a parking lot made of asphalt crumbs will last longer than from crushed stone because the crushed asphalt is less exposed to precipitation, is not washed away by rain, and does not form dust such as limestone crushed stone. Asphalt crumb is also used as a base for asphalting , patching of roads, for overhaul roads, roadside dumping. Our company "MskDor" offers to buy asphalt crumb at a low price per m3 from under the cutter or from under the crusher (crushed crumb), it is possible with delivery and self-pickup from the site, sale in Moscow and the Moscow region.

Sizes of asphalt crumb: from 0.5 cm - 4.5 cm, small enough to fill roads for cars or paths in the country.

Asphalt crumb application:

• Road construction, for summer cottages and country roads
• Parking device, parking for cars
• Laying asphalt chips on the road, in the garage
• Backfilling of roads and shoulders with asphalt chips
• Repair of a country or country road, filling tracks in the country

Before you make the laying of asphalt crumbs or a road in the country, you must first understand how much asphalt crumbs are needed. To do this, you need to calculate the area of \u200b\u200bthe road and multiply by the layer thickness.

Characteristics, sale and delivery of asphalt crumbs in Moscow, Moscow region.

The delivery of the asphalt cut is carried out by a dump truck, the measure of measurement is cubic meter m3 (cbm). Crumb compaction coefficient 1.3. Consumption of asphalt chips per 10 m2, with a rolled layer thickness of 10 cm, will be 1.3 cubic meters (m3). Our company "MskDor" offers you a service - asphalt crumb with delivery to Moscow and Moscow region (Moscow region). It is possible to buy for pickup. We make delivery around the clock in Moscow, Moscow region, delivery in the daytime (in the afternoon or in the morning) is also possible.

Asphalt crumb with delivery - price per m2. Buy asphalt chips in Moscow and the Moscow region. Weight 1 m3

Sale of asphalt chips at a price of 500 rubles. cube, delivery is possible in Moscow and the region from the company "MskDor" on the day of contact, the cost of delivery is calculated separately. The advantage of our company is that we sell crumbs of any volume, wholesale and retail, in small quantities. You can buy asphalt crumb from us in a small volume of 1 cubic meter (m3). Unlike us, many construction companies will not sell 3, 4, 5 cubic meters or 8 m3 chips due to low efficiency. Weight (mass) of asphalt crumb: one cube weighs 1.4 tons.

Asphalt crumb with delivery is more expensive than without delivery. The price is calculated and depends on the distance to your object, the number of cubes or tons. If you need high-quality asphalt crumb for filling roads and territories, fresh from under the milling cutter, then contact us, the sale price is cheap. Laying of asphalt chips is possible. Price per m2 with material from 170 rubles.

Asphalt crumbs from under the milling cutter are also called asphalt cut, because of the production technology by cutting the old asphalt road. Such crumb costs little more than from under the crusher (crushed crumb).

Asphalt crumb with delivery. Moscow Moscow region

The company "MskDor" offers: asphalt crumb with delivery - Moscow tsao (center) New Moscow, yuvao, vao, cjsc, yuzao, szao, sao, yuao, svao and the Moscow region (Moscow region) Ramenskoye district in Ramenskoye, Lytkarino, Lyubertsy Lyubertsy district Ostrovtsy Tomilino, Malakhovka Oktyabrsky, Zhukovsky, Voskresensk. Asphalt crumb with delivery of Bronnitsy in Bronnitsy, Voskresensky district, in Domodedovo in Domodedovsky district, In Chekhov, in Chekhovsky district, Domodedovsky district, Serpukhovsky district Serpukhov, delivery in Podolsky district in Podolsk. Asphalt crumb with delivery Moscow region Podolsk Shcherbinka Lviv Podolsk district, Balashikha district Balashikha, in Shchelkovo and in Shchelkovsky district, Gzhel Elektrougli Staraya Kupavna, Yegoryevsky and Shchelkovsky district, Chekhov in Chekhov district. You can buy a crumb in Odintsovo Odintsovo district Zvenigorod Golitsyno Krasnoznamensk, Aprelevka Moskovsky, Istra, Krasnogorsk Nakhabino Krasnogorsk district, Dedovsk Istra, Mytishchi district Dolgoprudny Mytishchi Khimki Lobnya in Mytishchinsky district, Khimki, Pushkino Korolev, Ivanteevka and Fupino district, Fryazo district Malino Stupinsky district, in Chekhov Chekhovsky district.

Delivery of asphalt chips in Moscow and the Moscow region (Moscow region) is carried out by dump trucks. Most organizations make delivery of material at night. The benefit when buying crumbs from us is the opportunity to buy crumbs with delivery in the Moscow region and Moscow, both at night and in the daytime - we work around the clock.

A discount applies for orders over 100 m3.

We work with legal organizations and individuals.

If you need, we can send our specialist to calculate the cost of work and measure the territory. Departure of a specialist and calculation - Free and seven days a week!

The owners of suburban areas know for sure how terrible the road is often outside the city. For example, not all even cottage settlements, builders equip a high-quality roadbed. As a rule, everything is done with ordinary rubble or even just a rammed dirt road. In this article, we will try to tell you about how to lay asphalt chips.

Using recycled asphalt?

Asphalt crumb, more often you can find the name asphalt granulate - the most optimal material in terms of the ratio of quality and cost, in comparison with a similar type of crushed stone in a layout with gravel. This material is used in the repair of road bases and pavements, the receipt of which is associated with the milling of old roads, where bitumen and crushed stone are included.

Undoubtedly, such material must have certain positive aspects, as well as disadvantages.

Pros:

1. It has long been confirmed by experts that the roads covered with crumbs are more durable and resistant to loads than the classic pavement made of ordinary crushed stone with gravel.
   2. The cost is an order of magnitude lower than the cost of crushed stone delivery, not to mention the more expensive asphalt concrete pavement.
   3. Simplicity of work. The crumb does not require bulky equipment such as road rollers. The granulate rolls well under the weight of passing cars, but it should be understood that in this case waves may appear. Therefore, it is worth carefully tamping so that ruts do not form over time.

Minuses:

Taking into account all the features, only one negative side comes to mind, it is that over time, such a coating requires periodic filling or leveling with a special grader. Such a coating has certain features; it also breaks down during a period of temperature drops and excessive moisture ingress.

Correct placement of asphalt granulate

Those who decided to restore or build a road to their home, or just make a convenient platform in front of the gate, should understand some important features... How long your road will last before the first repair directly depends on these features.

1. Determine the minimum tonnage of vehicles that will move along your section of the road.
2. Consider in advance what type of base will be laid under the asphalt crumb. For example, the choice may consist of sand, cement slabs, gravel, crushed stone. Also, determine the current state of the canvas, whether there are potholes, holes, cracks, ridges, waves.
3. Calculate the amount of funds that you are willing to donate for the road, taking into account all subsequent costs for possible repairs.

Asphalt Granulate Laying Technology

Before directly laying the crumb, you need to take care of the masonry surface itself.

1. We determine the area of \u200b\u200bwork and carry out high-quality markings, taking into account, among other things, the location of communications, the growth of plants, trees, etc.

2. We buy material, here it is worth adhering to such parameters based on your plot, given that for 100 sq. m. will need about 14 tons of the crumb itself.

3. It is advisable to take a roller, usually companies engaged in the production and delivery of crumbs, practice the provision of related services for the rental of equipment.

4. It is advisable to remove a layer of soil of the order of 30 cm, with a slope of 5-6 mm per meter. This will avoid flooding of adjacent areas during rains. After removing the soil, it is recommended to install geotextiles.

Important. Geotextiles will help to avoid subsidence of asphalt, this is especially applicable to roads on which heavy equipment will periodically move. In addition, geotextiles on rural roads help reduce the use of crumb.

5. Immediately we process the edges of the dug ditches, you can install curbs, if provided in the estimate.

6. After the work done, you can start directly laying the crumb itself.

Council. Wanting to save money, you can purchase the crumb in advance, for example, from October to April, when the cost of the material is much lower.

How to lay asphalt granulate correctly

The installation process itself is incredibly simple and even the most distant person from construction can handle it. It is only important to acquire a couple of three assistants who will be useful in this matter.

The process consists of several stages:

1. It is necessary to scatter the crumb approximately evenly over the area. Consider in advance how many layers of crumb are supposed to be based on your conditions.

Council. It is better to make two separate layers, each of which will be 6-8 cm. They need to be tamped separately, in the interval you can use a lining, or you can not, depending on the expected loads.

2.After the crumb has been leveled, you can start tamping. Of course, it is better to use a roller, it is simple to operate and does not require special skills. Tamp until complete hardening.

3. The last stage can be omitted, but it serves as an additional guarantee of the durability of the coating. This is the filling of the crumbs with bitumen emulsion, undoubtedly, these are additional costs, however, they are offset by delayed future repairs.

Due to the fact that the crumbs contain a binding element of bitumen, its properties increase significantly. The road, covered with asphalt crumbs, purchased from our company, is strong and durable. It is also worth ordering asphalt crumb from our company for the reason that it will not need to be poured every season, and even precipitation such as rain, snow, ice, as well as sudden temperature changes, will not be able to destroy it.

Lay asphalt chips with a minimum thickness of 10 cm and thicker, only in this way you can get a strong and reliable road surface. The road, made of asphalt crumbs, looks neat, without any flaws.

Buy asphalt crumb with delivery at a low price per m3 - in Moscow and Moscow region

We offer our customers only high quality materials with delivery and pickup at low prices.

SNT (Horticultural non-profit cooperatives)

DNP (Dacha non-profit partnership)

IZHS (Individual Housing Partnership)

LPH (Private subsidiary farm)

garage cooperatives

all types of construction machinery sites

car parks

temporary roads

Public roads

access roads

as well as for playgrounds and sports grounds.

When buying asphalt chips, we will deliver the material directly to the site, if there is a desire, the client can use self-pickup.

In order to place an order, it is enough to leave a request on our website or call the phone numbers listed below.

The asphalt concrete road surface of the Autobahn is exposed to constant mechanical stress from.

In addition, it is influenced by weather conditions and soil-hydrological factors.

Internal stress and strain roadwaycaused by these influences, accumulate, which leads to the appearance of defects and destruction of the upper layer of the pavement in the form of cracks and potholes.

To ensure the quality of the road surface meets safety requirements road traffic (Art. 12 Federal law dated 10.12.1995 for No. 196-FZ as amended on 26.07.2017 "On road safety"), road construction organizations carry out work to remove worn and damaged layers asphalt concrete pavement (ABP) and replacing them with new layers.

The volumes of old ABP removed annually in every large city of the Russian Federation amount to tens of thousands of tons, and in general, for the highways of Russia, it "runs up" more than a million tons dismantled asphalt concrete.

Modern technologies for processing old asphalt concrete are resource-saving in nature, since the reclaimed pavement is successfully used in the process of creating a new ABP.

Regeneration of the dismantled ABP is aimed at restoring and improving the technical and operational characteristics of asphalt concrete material in order to reuse it for paving highways or other road renovation works.

At the end of the service life road surface in its composition retains up to 90% of the useful mass asphalt concrete material suitable for further use.

To make the methods of processing used asphalt more understandable, let us consider in more detail the structure of the pavement and the properties of the main elements that make up it.

ABP road garments are the most common designs of all autobahn categories.

The above is the scheme of the so-called "road pie" - multilayer pavement with obligatory asphalt concrete pavement at least 15 cm thick.

GOST 9128-2013 "Asphalt concrete mixes ..." defines the composition of asphalt concrete mixes (p. 3.1) as rationally selected mixtures of crushed stone, gravel, sand and mineral powder with bitumen, mixed in a heated state. At the same time, it is customary to call asphalt concrete (clause 3.2) an asphalt concrete mixture (hereinafter - ABS) in a compacted state after rolling with rollers.

Distinguish between concepts asphalt and asphalt concrete used in road construction practice:

1. Asphalt is astringent organic matternatural or artificial with different content of bitumen in its composition (from 13% to 75%). It is a mixture of bitumen with sand and gravel. Real natural asphalt consists of heavy petroleum fractions and is little distinguishable from ordinary tar, for which the ancient Greeks called it - mountain tar.
2. Asphalt concrete - the result of technological mixing of bitumen with inert materials - crushed stone, gravel and sand, which significantly increase the strength characteristics of the asphalt concrete mixture. In other words, asphalt concrete is a modified version of traditional road asphalt pavement.

In the composition of ABP, bitumen is only 4.5-6.0%, the rest is crushed stone, gravel and sand.

This gave rise to a half century ago, on the basis of extensive research in the USA, USSR, European countries and China, to adopt concept of 100% suitabilityroad asphalt pavement for recycling and reuse.

Modern technologies for the regeneration and recycling of asphalt concrete pavements are the processing of an ABP worn out during operation, bringing its technical parameters and physicochemical characteristics to the required level.

The use of dismantled old asphalt concrete allows you to do this when minimum consumption of new binders and inert aggregates.

Waste material disposal

A kind of starting point for starting the processing of old asphalt concrete is the dismantling of the asphalt concrete bed.

It is carried out taking into account the state of the layer of the canvas, the type of coating and a number of other factors.

Asphalt pavement removed by layer-by-layer material removal of the worn-out bed, while dismantling either over the entire thickness of the road surface, or only the material of local damaged areas is removed.

In small areas so far use manual ways opening and removing asphalt using tools such as:

• percussion pneumatic tools;
• cutting equipment;
• crowbars;
• pick;
• sledgehammers;
• pickaxes.

In large areas Removing the UPS without specialized equipment is no longer necessary. The teams with jackhammers and shovels were replaced by mini excavators with hydraulic breakers.

Serious competition for traditional ways of removing the roadway is presented by modern road milling cuttersequipped with rotating milling drums for cutting old asphalt concrete to the required depth.

The width of the cut line on the road when removing the pavement depends on the width of the drum and varies from 350 mm to 2200 mm.

The steel teeth of the drums cut off the necessary layer of ABP and cut shallow grooves on the base of the pavement to improve the adhesion of the remaining base material to the new layer of asphalt mix or reclaimed asphalt concrete.

Milling layers the roadway is performed in two different ways:

• hot milling, carried out in conditions of preliminary heating of the ABP;
• cold milling, in which work begins without warming up.

Each of the milling methods has its own advantages and disadvantages.

Hot milling

This method for removing ABP was introduced earlier than cold milling was introduced.

With mobile infrared burners fueled by gas (propane-butane mixture) or kerosene, asphalt heats up and softens.

This helps to reduce the amount of force required to break the pavement to be dismantled.

Disadvantages hot milling are the following circumstances:

• high cost of used fuel resources;
• the risk of equipment fire and the risk of burns to personnel;
• destroyed asphalt material sticks together, making reapplication inconvenient;
• when stored in stacks at the warehouse of the ABZ, pieces of milled asphalt are caked in hot weather, which forces them to be sprinkled with sand or mineral powder.

When choosing hot milling, the priority motive is speed of repair workbecause the heated UPS shears off quickly and with minimal effort.

Summarizing the above, it can be noted that the hot method is costly, but fast.

Cold way

Cold milling requires more effort and is more time-consuming because the pavement layer is removed in its natural solid state.

Benefits of this technique are the following factors:

• invariability of the pavement structure, which makes it possible to use the removed material in the composition of the prepared asphalt concrete mixture;
• when stored in stacks, pieces of milled asphalt concrete do not cake;
• cost-effectiveness of the milling process.

Asphalt concrete scrap and granulate

Dismantling the old UPS leads to the formation of pieces of asphalt concrete different sizes, called asphalt concrete scrap.

As part of such waste - scrap - the main components of asphalt and asphalt concrete pavements remain - crushed stone, sand and bitumen residues.

The thickness of the removed layers is from 5 to 15 cm.

Piece sizes asphalt is not standardized, however, in the practice of separating asphalt blocks it is customary to divide into three conditional groups:

• small waste, the size of which does not exceed 20 cm;
• average scrap with dimensions of elements 15-40 cm;
• large blocks more than half a meter in size.

Asphalt scrap, being in the status of a secondary resource, is an excellent construction and repair material... Merits asphalt scrap the following qualities are considered:

• resistance to mechanical static and dynamic loads;
• resistance to atmospheric moisture and chemically active substances;
• resistance to sudden temperature changes;
• the possibility of further crushing by crushing with a jackhammer;
• low cost.

The average volumetric weight of asphalt scrap is 1800-2200 kg per 1 m3, while for asphalt concrete this parameter is slightly higher - from 2000 to 2450 kg or, respectively, 2-2.45 tons per 1 m3.

Depending on the crushing method pieces of old asphalt concrete get asphalt concrete granulate (hereinafter - ABG) and asphalt crumbwhich are in wide demand. Average density ABG - from 2100 to 2200 kg / m3

Standard STO NOSTROY 2.25.35-2011 “Roads. Construction of pavement foundations ”, ABG is defined as crushed old asphalt concrete (clause 3.2), which can be used in the manufacture of pavements and pavements.

Due to the growing demand for ABG in road repair works introduced GOST R 55052-2012 “Granulate of old asphalt concrete. Technical conditions", Regulating the requirements for this material by analogy with the European standard for asphalt concrete granulate EN 1310808.

This will raise the bar for the use of ABG as a high quality material for pavement.

In the Russian building materials market, the price of asphalt concrete scrap varies between 100-300 rubles / cubic meter. m, while secondary ABG is offered at a price RUB 500-1500 per ton.

Recycling and recovery

In the world practice of road construction work on the reconstruction of autobahns, they are successfully used regeneration methods and recycling of used pavement materials, allowing save on the purchase of new building materials.

Quite often, information sources on this topic incorrectly interpret the concepts of regeneration and recycling of asphalt concrete, mixing into one heap the final results of completely different inherently technological concepts.

Let us clarify the features of these processes associated with their names. The term regeneration is taken from the Latin language - "regeneratio" means "rebirth, restoration".

Applied to the reconstruction of motorway pavements regeneration means the restoration of their technical and operational qualities:

• continuity,
• passability,
• accident rate and safety, etc.

And for the ABP itself - restoration of physical and mechanical properties and quality indicators.

Among these properties:

• roughness;
• wear resistance;
• shear stability;
• crack resistance.

Experts call the reuse of old UPS material english word "Recycling" meaning recirculation - reuse, return to circulation, alteration / processing for useful use.

Recycling of the old pavement can be carried out without regenerating its properties, for example, in the case of using granulated asphalt scrap to strengthen road shoulders, there is no need to restore the plasticity necessary for the asphalt concrete mixture when it is reused in the road surface.

ABP recycling algorithm

For the technical implementation of recycling of old asphalt concrete in order to use it as a top layer of the road surface the following works are in progress:

1. Removing the damaged layer coatings by hot or cold milling.
2. Manufacturing ABG by crushing the layer removed by milling to the size of crushed stone fractions.
3. Heating the granulate in a special furnace without an open flame to restore the binding and plastic properties of old bitumen in the composition of the removed asphalt concrete.
4. Adding a portion of fresh bitumen for adjusting the binding and plastic properties of the asphalt mixture in accordance with the recipe.

When working on the processing of old asphalt, the following requirements must be observed, aimed at ensuring the quality of the new asphalt concrete pavement:

1. For new asphalt mix obtained from the recycling process, preliminary design required its composition, in which the formulation of the new asphalt concrete mixture, the grain composition of the inert components, the viscosity of bitumen and its content in the old asphalt concrete, the processing technology and the type of mixing plant, the amount of old asphalt concrete in the composition of the regenerated mixture are determined.
2. When heating granulate in ovens, observe temperature conditions , preventing the beginning of evaporation of light fractions from the composition of the binder and its burnout, which can occur when the flash point of bitumen is exceeded (180-220 deg. C for viscous and 45-110 deg. C for liquid bitumen).

Quantitative indicators for the content of granulate and additives in new asphalt concrete should be determined by laboratory methods in accordance with GOST, TU and other regulatory documents.

Recycling Methods for Waste Asphalt Concrete

By venue recycling technological measures distinguish two ways of processing removed road building material:

• regeneration of old asphalt concrete in stationary conditions at an asphalt concrete plant (ABZ), involving the preliminary dismantling of the road surface and sending asphalt concrete scrap at the ABZ for processing;
• recycling of ABP directly at the site of reconstruction of the canvas, involving the re-laying of the pavement using special road equipment - remixers, recyclers, asphalt heaters, etc.

Depending on the application of heating asphalt concrete in its processing recycling technology subdivide into two large groups:

1. Hot recycling, which cannot do without heating the old asphalt concrete material to the softening temperature of the old bituminous binder. Heating is used at the stage of dismantling the ABP, in the process of restoring the plastic properties of old bitumen and when mixing granulate with fresh components in the manufacture of asphalt concrete mixture for laying instead of the removed canvas.
2. Cold processing methods ( cold recycling), during the implementation of which there are no thermal effects on old stuff and the components of the fresh mixture.

The realities of road repair practice are such that most commonly used combined options these techniques.

For example, hot processing of asphalt concrete not so long ago was identified with work in stationary plant conditions in an area with a developed industrial infrastructure (warehouses, transport routes for the delivery of asphalt scrap and removal of prepared asphalt concrete mixture, containers with bitumen, etc.).

With the advent of mobile ADPs, asphalt processing is carried out directly on the road being repaired, ensuring that all the necessary technological operations inherent in hot recycling are performed.

Cold milling, used in the methods of cold recycling of mobile plants, has successfully "migrated" into the technological streams used at stationary ABZs.

Instead of warming up in mixers crushed pieces of ABP or granules from road milling mixed with emulsion additives or foamed concrete, after which they are considered fit for styling.

As an alternative to the traditional technology of ABP recovery according to the formula "milling and re-asphalting" hot and cold regeneration techniques at the site of roadworks.

The first of them uses the reclamation of asphalt concrete at a stationary or mobile type plant, and the second involves loosening the pavement material, processing it on site, improving the properties and laying it into the pavement.

The work involved a set of thermal profiling equipmentconsisting of an asphalt preheater, a hot recycler, also called a thermal profiling machine, and smooth-drum rollers.

Working principles of asphalt concrete plants

Process flow processing of asphalt concrete at the ABZ comprises next steps:

Hot processing at the ABZ has the following advantages:

• the possibility of continuous quality control of components of the old UPS;
• regulation of the formulation of the mixture, taking into account the composition of the used granulate;
• the ability to use up to 80% of the old material without reducing the prescription properties of the fresh asphalt mix.

Of the shortcomings hot processing under stationary conditions, the following factors are noted:

• high costs of transportation of the dismantled coating;
• high energy consumption of drying and heating of asphalt concrete mixture components;
• the presence of carcinogenic hydrocarbons and mineral dust in smoke emissions.

Features of hot and cold methods on site

Hot wayalso called thermal profiling of asphalt, is carried out directly at the repair site roadbed.

For all technologies thermal profiling is characterized by the following operations:

• warming up the upper layer of the ABP;
• loosening the heated layer;
• mixing of the loosened components;
• re-styling.

Depending on the specific hot recycling technology, at various stages of the technological process, operations for adding bitumen, adding plasticizers or fresh asphalt concrete mixture, etc. can be used.

Hot Onsite Asphalt Recycling Technologies have the following advantages:

• high physical and mechanical properties of reclaimed asphalt concrete;
• ease of use of technology;
• minimal wear of the cutting tool;
• preservation of the existing geometry of the coating;
• the ability to work in one lane, without interfering with traffic in another lane;
• reduction in the cost of repair and installation work;
• increase in the service life of the coating;
• reduction of the terms of repair work by almost half.

The disadvantages of the "hot" method include:

• environmental problems - when heated, vapors of old bitumen evaporate;
• deterioration of bitumen plasticity when the heat treatment temperature is exceeded;
• difficulties in organizing work, since the entire machine complex used in work must be in "combat" readiness.

Cold recycling worksconducted on site, are performed in the following sequence:

Of the merits cold recycling in place note:

• low power consumption;
• ecological purity of technology;
• preservation of the integrity of the soil, the absence of its deformations;
• high-quality coating regeneration.

The disadvantages of this technique are as follows:

• high cost of equipment (emulsifiers, etc.);
• the need for a clear organization preparatory work and constant monitoring of the technical condition of the equipment used.

Related Videos

Video about the benefits of on-site and small-scale road repairs using special equipment for infrared heating and waste asphalt regeneration:

Conclusion

The use of resource-saving technologies for the use of reclaimed old asphalt concrete materials makes it possible to create an adequate replacement for a certain part of the components of the asphalt concrete mixture in compliance with the basic requirements for the quality of road surfaces.

At the same time, it is essential costs are reduced for the purchase of bitumen, energy resources and materials are saved.

In contact with

One of the most common recycled materialsfrom recycling is asphalt crumb, also known as asphalt granulate, and is used in a wide variety of construction and renovation jobs.

This material is obtained by cold milling of the old asphalt pavement removed during the replacement or repair of the roadway. Thus, asphalt crumb consists of bits of bitumen and fine gravel from three to five millimeters in diameter, in addition, it may contain traces of sand or other elements.

Use of asphalt crumb

Due to the inexpensive price, ease of use, as well as the fact that the crumb, as a product obtained by processing, causes relatively less harm to the environment, the range of its application is extremely wide and includes almost all spheres of human economic activity:

Due to the widespread use of this material, as well as the availability of many other options on the market, consumers, trying to find the most acceptable option for themselves, often ask the question of how much a cube of asphalt chips costs. Below in the abstract form are the main reference characteristics of this material, including answers to questions such as how much 1 cubic meter of asphalt crumb weighs and how many cubes fit in a KAMAZ or dump truck.

• The average price of asphalt chips in Moscow is $ 12-14, in the regions it starts from $ 10;
• 1 cube of asphalt crumb can weigh from 1500 to 1900 kilograms, depending on its composition;
• Accordingly, about 12 cubic meters will fit into the body of an average KAMAZ;

The consumption of crumbs per m 2 with a layer thickness of 20 centimeters is approximately 400-600 kilograms.

Laying technology

1. First of all, the base for the asphalt crumb is prepared. The terrain is leveled, large debris is removed: cobblestones and scrap metal. It is quite possible to skip this point if the terrain condition is acceptable for this purpose.
2. Optionally, the surface is primed using bitumen emulsion of asphalt crumb for better adhesion in the future. Its consumption is about one liter per square meter;
3. Laying crumb on the surface, compaction of the laid layer. This can be done both with specialized equipment and independently. It is worth remembering that the compaction coefficient of asphalt crumb, depending on the composition, reaches a value of 2 units, which means that during rolling, the thickness can be reduced by up to two times and be sure to include this factor in the calculations!
4. Impregnation of bitumen emulsion of asphalt crumb. This will further strengthen it and increase its service life. Consumption of about 0.5 liters per m2.

Laying of asphalt chips with my own hands not too different from the technology described above. The only difference is that you will have to lay it out yourself with the help of shovels, and roll it in cars. Difficulties may arise with how to melt asphalt crumb: without the use of technology, this is not only laborious, but also flammable. You can melt the crumb over an open fire in a metal container of sufficient size. Be sure to have a fire extinguisher with you to extinguish a possible fire!

Pros and cons of using asphalt chips

To begin with, let's mention the environmental aspect of using asphalt crumb. Many people, from among those who will ennoble country cottage areahaving children and animals in the family, I wonder if asphalt crumb is harmful. Despite the fact that it contains bitumen, a product of oil refining, which, accordingly, causes more harm to the environment than good, the use of crumbs in the household is more environmentally friendly than in the case of asphalt of the same volume.

According to the documentation, asphalt crumb has a hazard class 4, on a par with household waste such as old clothes and shoes.

1. A wide range of applications, covering most of the spheres of human economic activity;
2. Affordable price, which favorably distinguishes asphalt crumb against the background of crushed stone or gravel and, due to similar properties, has recommended crumb as a suitable replacement for them;
3. Long service life when used in suitable conditions for this: minor roads and short paths and sports complexes;
4. Ease of styling. For this, it is not necessary to prepare the surface in advance, and rolling of asphalt crumbs does not imply the obligatory participation of special equipment; in order to save money, it can be done with the help of passing cars;
5. High resistance to adverse weather conditions.

The disadvantages of asphalt crumb, like any other material, exist:

1. More harmful impact on the environment in comparison with gravel or sand;
2. The need for periodic updating of the canvas.

However, all the shortcomings are fully covered by its numerous positive qualities.

Alternative options

In addition, consumers often ask the question: which is better, asphalt chips or crushed stone? There is no definite answer to it, since these materials, including sand and broken bricks and concrete, as a rule, perform the same functions. But the price of the crumb is lower, and the crushed stone has a less harmful effect due to the absence of bitumen in the composition. So the choice must be made based on circumstances and personal preference.

Summing up

Thus, the asphalt crumb will become for you ideal optionif you value simplicity and ease of styling and prefer to spend extra money on yourself and your loved ones, and not on construction Materials... For a parking lot or driveway, playground or garage floor, this material will meet your every need!