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A new type of asphalt concrete and its preparation process

A new type of asphalt concrete technology, applied in the field of concrete, can solve the problems of difficult polymer dispersion, high mixing temperature, asphalt aging, etc., and achieve the effects of improving anti-aging performance, improving adsorption performance, and strengthening bonding

Active Publication Date: 2021-08-27
江苏港顺新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the actual application of polymer modified asphalt, there are also some problems: (1) the dispersion of polymer in asphalt is difficult, and it is not easy to prepare; (3) the mixing temperature of modified asphalt mixture is high, resulting in asphalt Severe aging during mixing

Method used

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  • A new type of asphalt concrete and its preparation process
  • A new type of asphalt concrete and its preparation process
  • A new type of asphalt concrete and its preparation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1: Preparation of bentonite-supported nano-SiC-TaC composite material

[0033] Bentonite-loaded nano-SiC-TaC composites were prepared by the following method:

[0034] (1) Add a glucose solution with a mass solubility of 30% to the bentonite. After the bentonite is completely wetted, place it in an aerobic atmosphere for calcination at 800° C. for 2 hours, and cool to room temperature with the furnace to obtain porous bentonite.

[0035] (2) Use ethyl orthosilicate as the silicon source, mix it with absolute ethanol, deionized water and dilute hydrochloric acid, the molar ratio of ethyl orthosilicate, absolute ethanol, deionized water, and hydrogen chloride is 1:2.5 : 2.5: 0.01 to obtain solution A; using tantalum pentachloride as the tantalum source, dissolve it in absolute ethanol to form saturated solution B; prepare a glucose aqueous solution with a mass concentration of 30% to obtain solution C.

[0036]Mix solution B and solution A, then add porous benton...

Embodiment 2

[0039] Example 2: Preparation of bentonite-loaded nano-SiC-TaC composite material

[0040] Bentonite-loaded nano-SiC-TaC composites were prepared by the following method:

[0041] (1) Add a glucose solution with a mass solubility of 30% to the bentonite. After the bentonite is completely wetted, place it at 750° C. for calcination for 2 hours in an aerobic atmosphere, and cool to room temperature with the furnace to obtain porous bentonite.

[0042] (2) Use ethyl orthosilicate as the silicon source, mix it with absolute ethanol, deionized water and dilute hydrochloric acid, the molar ratio of ethyl orthosilicate, absolute ethanol, deionized water, and hydrogen chloride is 1:2.5 : 2.5: 0.01 to obtain solution A; using tantalum pentachloride as the tantalum source, dissolve it in absolute ethanol to form saturated solution B; prepare a glucose aqueous solution with a mass concentration of 30% to obtain solution C.

[0043] Mix solution B and solution A, then add porous bentonit...

Embodiment 3

[0046] Embodiment 3: Preparation of modified basalt chopped fibers

[0047] The modified basalt chopped fiber is prepared by the following method: the basalt chopped fiber is soaked in 50% acetic acid aqueous solution for 1 hour, then filtered, washed with water, and dried at 100°C; Add KH550 and ethanol into water, heat to 45±2°C, add basalt chopped fibers, stir for 1 hour, filter and dry at 100°C to obtain modified basalt chopped fibers. The mass ratio of silane coupling agent KH550, ethanol and water is 1:4:0.5.

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Abstract

The invention provides a novel asphalt concrete and its preparation process. The asphalt concrete is made of the following raw materials in weight percentage: 2.5-4.5% of limestone powder, 2-3.5% of fly ash, 4-6% of asphalt, and modified basalt 0.8-1.3% of chopped fibers, 2.5-6% of bentonite-loaded nano-SiC-TaC composite material, and the balance is coarse and fine aggregates. The preparation process includes the following steps: (1) weighing each raw material; (2) heating the coarse and fine aggregates to 125-130°C, and heating the asphalt to 130-135°C for later use; (3) sequentially adding limestone powder into the mixer , fly ash, modified basalt chopped fibers, bentonite-loaded nano-SiC-TaC composite material, stir at 125-130°C for 10-15min, add asphalt, stir, add coarse and fine aggregates, stir, and you get it. The mixing temperature of the invention is low, the dispersion performance of each modified substance is good, and the prepared asphalt concrete has strong resistance to high-temperature deformation, good anti-aging performance, high stability and excellent comprehensive performance.

Description

technical field [0001] The invention relates to the technical field of concrete, in particular to a novel asphalt concrete and a preparation process thereof. Background technique [0002] Asphalt concrete, commonly known as asphalt concrete, is artificially selected with a certain gradation composition of mineral materials, crushed stone or crushed gravel, stone chips or sand, mineral powder, etc., and a certain proportion of road asphalt materials, mixed under strictly controlled conditions made mixture. [0003] With the rapid development of society and economy, the traffic volume of roads is constantly increasing. In order to improve the road traffic environment and improve driving comfort, asphalt pavement has been widely used in road construction in my country in the past 3 years. Asphalt pavement not only has smooth surface, comfortable driving, low vibration and low noise, but also has no joints, wear resistance, no dust, and short construction period. At the same ti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B26/26C04B20/02C04B14/46C04B14/32C04B14/10
CPCC04B14/104C04B14/322C04B14/324C04B14/4643C04B20/023C04B26/26C04B14/28C04B18/08C04B14/02
Inventor 王春山徐天兵孙振武贺华荣孙霞
Owner 江苏港顺新材料有限公司
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