Cement asphalt mortar material with low elastic modulus

A low-elastic-modulus, cement-asphalt technology, applied in the field of building materials, can solve the problems of difficulty in improving the shock absorption performance, environmental pollution, waste, etc., and achieve high bond strength, good shock absorption performance, and improved The effect of shock absorption

Inactive Publication Date: 2010-07-07
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The currently used CA mortar materials mainly rely on the asphalt emulsion in the group to provide shock absorption performance. Due to the limitation of the performance of the asphalt emulsion itself, it is difficult to greatly improve its shock absorption performance on the existing basis.
[0004] In recent years, the rapid development of the rubber industry and the automobile industry has produced a large amount of waste rubber materials such as waste rubber tires, which not only pollutes the environment but also brings huge waste

Method used

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  • Cement asphalt mortar material with low elastic modulus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The mass ratio of each component is as follows:

[0029] Cement: 1, emulsified asphalt: 0.45, sand: 1.3, water reducer: 0.0013, water: 0.55, aluminum powder: 0.0001, expansion agent: 0.32, defoamer: 0.0045, air-entraining agent: 0.00025, rubber particles: 0.16.

[0030] Accurately weigh various components according to the above mixing ratio, first weigh the solid raw materials in proportion, put them together in a mixer and stir for 30 seconds, then add emulsified asphalt and water and stir for another 120 seconds. The performance test was carried out on the prepared CA mortar material. The test results are shown in Table 1.

Embodiment 2

[0032] The mass ratio of each component is as follows:

[0033] Cement: 1, emulsified asphalt: 0.45, sand: 1.3, water reducer: 0.0013, water: 0.55, aluminum powder: 0.0001, expansion agent: 0.32, defoamer: 0.0045, air-entraining agent: 0.00025, rubber particles: 0.24.

[0034] Accurately weigh various components according to the above mixing ratio, first weigh the solid raw materials in proportion, put them together in a mixer and stir for 30 seconds, then add emulsified asphalt and water and stir for another 120 seconds. The performance test was carried out on the prepared CA mortar material. The test structure is shown in Table 1.

Embodiment 3

[0036] The mass ratio of each component is as follows:

[0037] Cement: 1, emulsified asphalt: 0.45, sand: 1.3, water reducer: 0.0013, water: 0.55, aluminum powder: 0.0001, expansion agent: 0.32, defoamer: 0.0045, air-entraining agent: 0.00025, rubber particles: 0.32.

[0038] Accurately weigh various components according to the above mixing ratio, first weigh the solid raw materials in proportion, put them together in a mixer and stir for 30 seconds, then add emulsified asphalt and water and stir for another 120 seconds. The performance test was carried out on the prepared CA mortar material. The test results are shown in Table 1.

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Abstract

The invention relates to a CA mortar material with high shock absorption performance for intercity high-speed railways and city subways, in particular to a CA mortar material with low elastic modulus, which is prepared by mixing and stirring the following raw materials in portions by weight: 1 portion of cement, 0.4-2.5 portions of emulsified asphalt, 0.01-3.5 portions of sands, 0.01-0.4 portion of expanding agent, 0-0.01 portion of defoaming agent, 0.00003-0.003 portion of air entraining agent, 0.001-0.1 portion of water reducing agent, 0-0.8 portion of water, 0.00001-0.001 portion of aluminum powder and 0.01-0.4 portion of rubber particle, wherein the rubber particle is rubber treated by an interfacial treatment agent, and the particle diameter is 0.5-3 millimeters. The CA mortar material with low elastic modulus, which is provided by the invention, can reduce the elastic modulus of the CA mortar and improve shock absorption and shock insulation effects.

Description

technical field [0001] The invention relates to a cement asphalt mortar material with high damping performance for intercity high-speed railways and urban subways, in particular to a cement asphalt mortar material with low elastic modulus, belonging to the field of building materials. Background technique [0002] High-speed railway is the key development direction in the field of transportation construction in my country. Ballastless track structure is widely used in high-speed railway construction because of its good stability, integrity and less maintenance. Cement asphalt mortar (CA mortar for short) is a key component of slab ballastless track, which mainly plays a role in slowing down track vibration and ensuring track stability. Therefore, the use of CA mortar shock-absorbing materials improves the operating safety of high-speed trains. Therefore, it has broad application prospects. [0003] The currently used CA mortar materials mainly rely on the asphalt emulsion...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B14/06
Inventor 李悦谢冰周孝军鲍俊玲
Owner BEIJING UNIV OF TECH
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