What additives are there for asphalt concrete?

The additives in asphalt concrete vary depending on the improved road performance.

If the ability to resist rutting deformation at high temperature is improved, anti-rutting agent can be added, and there are many types, including domestic and imported, such as sasobit; If the low temperature is improved, organic fibers can be added; If the aging resistance is improved, anti-aging agents can be added, such as anti-photoaging agents; If the water stability is improved, cement, lime powder, etc. can be added.

The materials that make up asphalt concrete are relatively simple, mainly asphalt materials, coarse aggregates, fine aggregates and mineral powder fillers. Asphalt is a cementing material in concrete, which can combine loose aggregate and mineral powder into a whole, and plays the role of pasting and transferring loads.

There are more modifiers for asphalt, such as PE and sasobit (I forgot how to spell it in English). There are also anti-rutting agents, etc.

Asphalt concrete is a building material.

Asphalt concrete (bituminousconcrete) is commonly known as asphalt concrete, which is a mixture of ore with a certain gradation composition, crushed stone or crushed gravel, stone chips or sand, mineral powder, etc., and a certain proportion of road asphalt materials.

Bitumen is a complex black-brown mixture of hydrocarbons of different molecular weights and their non-metallic derivatives, which is a kind of high-viscosity organic liquid, which is liquid and has a black surface and is soluble in carbon disulfide. Asphalt is an organic cementitious material that is waterproof, moisture-proof and anti-corrosion. Asphalt can be mainly divided into three types: coal coke asphalt, petroleum asphalt and natural asphalt

Among them, coal coke asphalt is a by-product of coking.

According to the classification of (GB8075-87), concrete admixtures can be divided into four categories according to their main functions: 1. Admixtures that improve the flow and deformation properties of concrete mixture: including various water reducing liu, air entraining agents and pumping agents.

2. Admixtures to adjust the setting time and hardening performance of concrete: including retarder, early strength agent, quick-setting agent, etc. 3 Admixtures to improve the durability of concrete:

Including air-entraining agents, waterproofing agents, and rust inhibitors. 4. Other admixtures to improve the properties of concrete: including air entraining agents, expansion agents, antifreeze agents, colorants, waterproofing agents and pumping agents.

According to the nomenclature and definition of (GB8075-87) admixtures, admixtures can be divided into 16 names, each of which is customized as follows: 1. Ordinary superplasticizer: under the condition that the collapse degree of concrete is basically the same, the admixture can reduce the amount of water tremor in the mixing; 2 Early Strength:

admixtures that accelerate the early strength development of concrete; 3. Retarder: an admixture that prolongs the setting time of concrete; 4. Air entraining agent: an admixture that can introduce a large number of evenly distributed, stable and closed tiny bubbles in the process of mixing concrete; 5 High-efficiency superplasticizer:

Under the same condition of concrete collapse, the admixture can greatly reduce the amount of water used in the mixture; 6. Early strength superplasticizing agent: superplasticizer with both early strength and water reduction functions; 7. Retarding superplasticizer: superplasticizer with both retarding and water reducing functions; 8 Air Entrainment Water Reducer:

Admixtures with both air entrainment and water reduction functions; 9. Waterproofing agent: admixture that can reduce the permeability of concrete under hydrostatic pressure; 10. Rust inhibitor: an admixture that can inhibit or alleviate the corrosion of steel bars or other embedded metals in concrete; 11 Aerator:

In the process of concrete preparation, gas is released due to chemical reaction, which can make the concrete cluster form a large number of pores; 12. Expansion agent: an admixture that can make the volume of concrete expand to a certain extent; 13. Antifreeze: an admixture that can harden the concrete at negative temperature and reach sufficient antifreeze strength within the specified time; 14 Colorants:

It can prepare admixtures with stable color concrete; 15. Quick-setting agent: an admixture that can make concrete harden quickly; 16 Pumping agent: an admixture that can improve the pumping performance of concrete mixtures.

Asphalt mixture is a kind of composite material, which is mainly composed of asphalt, coarse aggregate, fine aggregate and mineral powder, and some also add polymer and wood cellulose; These materials of different qualities and quantities are mixed to form different structures and have different mechanical properties. According to the different types of aggregates used, it can be divided into several categories of gravel, gravel, sandy and slag, and crushed stone is the most common.

You know what isConcrete additivesWhat are the types of concrete additives? What are the common concrete additives? How much is the number of additives in general concrete? Let's take a look.

Concrete additives, referred to as admixtures, are substances used to improve the properties of concrete. In the process of mixing concrete, it is mixed with potatoes and used in noise. The dosage is generally not more than 5% of the cement mass.

Types of concrete additives:

It is divided into four categories according to the main functions:

1) Admixtures to improve the performance of concrete mixtures and workability, including various water reducing agents, air entraining agents and pumping agents, etc.;

2) Admixtures that adjust the setting time and hardening properties of concrete, including retarders, early strength agents and quick-setting agents;

3) Admixtures to improve the durability of concrete, including air-entraining agents, waterproofing agents and rust inhibitors;

4) Admixtures to improve other properties of concrete, including aerating agents, expansion agents, antifreeze agents, colorants, waterproofing agents and pumping agents, etc.

Water reducer. 1) Ordinary superplasticizer.

Under the condition that the slump of concrete is basically the same, the admixture can reduce the amount of water used for mixing. Commonly used superplasticizers are anionic surfactants.

2) High-efficiency superplasticizer.

Under the condition that the slump of concrete is basically the same, the admixture can greatly reduce the amount of water used for mixing.

3) Retarding water reducer.

Admixtures with both retarding and water reduction functions.

4) Early strength superplasticizer.

Admixtures with both early strength and water reduction functions.

5) Air entrainment water reducer.

Admixtures with both air entrainment and water reduction functions;

Early strength. Admixtures that improve the early strength of concrete and have no significant effect on the later strength.

Retarder. Admixtures that extend the setting time of concrete.

Air-entraining agent. In the process of mixing concrete, a large number of evenly distributed, stable and closed microscopic bubbles can be introduced.

Water repellent agent. Admixtures that can reduce the permeability of concrete under hydrostatic pressure.

Rust inhibitors. It can inhibit or reduce the corrosion of steel bars or other embedded metals in concrete.

Aerator. In the process of concrete preparation, due to the chemical reaction and the release of gas, a large number of pores are formed in the concrete.

Bulking agent. It is an admixture that can make concrete expand by a certain volume.

Antifreeze. It is an admixture that can harden the concrete at negative temperature and achieve sufficient antifreeze and strength within the specified time.

Colorants. It can prepare admixtures with stable color concrete;

Accelerator. Admixtures that can make concrete set and harden quickly.

Pumping agent. Admixtures that improve the pumping performance of concrete mixtures. The materials used to make pumping agents include high-efficiency superplasticizers, retarders, air-entraining agents and thickeners.

** of concrete additives

Now the commonly used admixtures are basically two kinds of high-efficiency superplasticizer and air-entraining agent, the superplasticizer is divided into powder and liquid, the liquid is about 2000 3000 a ton, and the solid content of the air-entraining agent paste is more than 10,000 yuan.

The above is my definition of concrete additives, the types of concrete additives and their meanings, and some introductions to the ** of concrete additives, I hope it can help you.

Summary. Hello, tartar sand and concrete both belong to building materials, but their properties and composition are different, so in general, asphalt sand is not mixed into concrete for use.

Hello, asphalt sand and concrete are both building materials, but their properties and composition are different, so in general, asphalt sand will not be mixed into concrete for use.

Asphalt sand is a material made from a mixture of asphalt and quartz sand, which is mainly used in road construction and rehabilitation. Concrete, on the other hand, is a building material made of a mixture of water-type mud, stones, sand, etc.

Concrete mainly needs cement to form a cementing material, and the asphalt in the asphalt sand is an oily substance, which cannot play a similar cementing role with the cement in the concrete. At the same time, the quartz sand in the asphalt sand is also relatively rough, which is different from the stone or gravel in the concrete, which will affect the solidity and durability of the concrete and the oak soil after mixing. Therefore, asphalt sand and concrete are generally not mixed.

My friend gave me a little bit of raw asphalt pavement repair and removal of the cost material, can I use it as concrete sand and gravel?

What do you want to use it for?

Hit the ground. The site is paved with flooring.

Do you have a calendar yard floor in your own home? If you have your own home, you can use it in order to save and not waste Bu Li Sou, but if you use it in a place where cars come and go frequently, it is not recommended to disturb the shed.

Use your own yard dam.

Moreover, although the cost of the original asphalt pavement repair is also made of asphalt and stone, they are quite different from concrete sand and gravel in terms of particle shape, size, density, etc. Therefore, it is not recommended to use the cost of the original asphalt pavement repair directly as concrete sand and gravel. Comparatively speaking, the particle shape, size and density of concrete sand and gravel are more uniform, and they have undergone certain screening, washing, and selection in the processing process to ensure their uniformity and quality.

The cost of repairing the original asphalt road Chaqing surface is taken out of the asphalt pavement and has not been screened and screened, which may contain more oily impurities and impurities, which is not conducive to the quality and strength control of concrete. Therefore, it is recommended that you do not use the cost of the original asphalt pavement repair for the preparation of mixed concrete, so as not to affect the quality and strength of the concrete.

No more than three tons of incoming cars.

Thank. Uh-huh, okay