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Cement asphalt mortar with high elastic damping

A technology of cement asphalt and cement, applied in the field of cement asphalt mortar, can solve the problems of poor stability of emulsified asphalt, need to be improved, low early strength of cement emulsified asphalt mortar, etc., achieve stable performance, improve crack resistance and volume stability, good The effect of damping properties

Active Publication Date: 2014-03-26
CHINA NAT OFFSHORE OIL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high and low temperature stability of its emulsified asphalt is poor, and the early strength of cement emulsified asphalt mortar is low, and the stability and high and low temperature construction performance of cement emulsified asphalt mortar need to be improved

Method used

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  • Cement asphalt mortar with high elastic damping

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1. Preparation of cement asphalt mortar

[0025] (1) Preparation of dry powder: mix PI 42.5 cement, UEA expansion agent, river sand (fineness modulus of 1.4), aluminum powder (200 mesh) and rubber powder (30 mesh) to mix and stir to obtain dry powder. ; Among them, the mass ratio of PI 42.5 cement, UEA expansion agent, river sand, aluminum powder and rubber powder is 90:10:132:0.005:3;

[0026] (2) Preparation of cement asphalt mortar: mix slow-cracking anionic emulsified asphalt, water, polycarboxylate water reducer and organosilicon defoamer and stir to obtain a liquid mixture, and put the liquid mixture into the dry powder obtained in the previous step And mix evenly to obtain cement asphalt mortar; wherein, the mass ratio of PI 42.5 cement, UEA expansion agent, river sand, emulsified asphalt, water, water reducing agent, defoamer, aluminum powder and rubber powder is 90: 10:132:37:19:1.0:0.07:0.005:3.

[0027] The main performance parameters of the cement asphalt...

Embodiment 2

[0028] Example 2. Preparation of cement asphalt mortar

[0029] (1) Preparation of dry powder: mix and stir PI 52.5 cement, UEA expansion agent, river sand (fineness modulus of 1.4), aluminum powder (200 mesh), rubber powder (particle size of 200 mesh) and polypropylene fiber The dry powder is uniformly obtained; wherein the mass ratio of PI 52.5 cement, UEA expansion agent, river sand, aluminum powder, rubber powder and polypropylene fiber is 90:10:132:0.005:3:1.5;

[0030] (2) Preparation of cement asphalt mortar: mix slow-cracking anionic emulsified asphalt, water, polycarboxylate water reducer and organosilicon defoamer and stir to obtain a liquid mixture, and put the liquid mixture into the dry powder obtained in the previous step And mix evenly to obtain cement asphalt mortar; among them, the mass parts of PI 52.5 cement, UEA expansion agent, river sand, emulsified asphalt, water, water reducing agent, defoamer, aluminum powder, rubber powder and polypropylene fiber The rati...

Embodiment 3

[0032] Example 3. Preparation of cement asphalt mortar

[0033] (1) Preparation of dry powder: mix PII42.5 cement, UEA expansion agent, river sand (fineness modulus of 1.4), aluminum powder (200 mesh), rubber powder (particle size 150 mesh) and polypropylene fiber. Stir uniformly to obtain a dry powder; wherein the mass ratio of PII 42.5 cement, UEA expansion agent, river sand, aluminum powder, rubber powder and polypropylene fiber is 90:10:180:0.01:1:1;

[0034] (2) Preparation of cement asphalt mortar: mix slow-cracking anionic emulsified asphalt, water, polycarboxylate water reducer and organosilicon defoamer and stir to obtain a liquid mixture, and put the liquid mixture into the dry powder obtained in the previous step And mix evenly to obtain cement asphalt mortar; among them, the mass parts of PII 42.5 cement, UEA expansion agent, river sand, emulsified asphalt, water, water reducing agent, defoamer, aluminum powder, rubber powder and polypropylene fiber The ratio is 90:10:...

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Abstract

The invention provides a cement asphalt mortar. The cement asphalt mortar comprises cement, an expanding agent, sand, emulsified bitumen, water, a water reducer, an antifoaming agent, aluminum powder and rubber powder; The mass part ratio of cement to expanding agent to sand to emulsified bitumen to water to water reducer to antifoaming agent to aluminum powder to rubber powder is 90: (5-15): (100-180): (25-45): (15-30): (0.1-1.5): (0.01-0.15): (0.001-0.02): (1-20). According to the invention, rubber powder recovered by old tire can replace of partial emulsified bitumen or sand, under the condition of keeping certain intensity, the rubber powder has better damping performance than that of asphalt, simultaneously the rubber powder has low temperature sensitivity and is capable of keeping good damping performance under the various temperature; the adopted polypropylene fiber is capable of improving the uniformity of a cement asphalt mortar mixture, substantially raising the workability of the cement asphalt mortar mixture and enhancing the crack resistance and volume stability of the mortar.

Description

Technical field [0001] The invention relates to a cement asphalt mortar with high elastic damping, which is suitable for intercity high-speed railways, urban high-speed light rails and urban subways. Background technique [0002] Chinese patent application 200710149995.8, Chinese patent application 200710078508.3 and Chinese patent application 200710078480.3 respectively disclose an emulsified asphalt, which all use a combination of a cationic emulsifier and a nonionic emulsifier as an emulsifier to prepare emulsified asphalt. Application, the effect is good. However, the above-mentioned emulsified asphalt is used in the unit plate ballastless track cement emulsified asphalt mortar, and it is not applicable to the longitudinally connected slab ballastless track cement emulsified asphalt mortar. [0003] Chinese patent 200910076818.0 discloses an emulsified asphalt used for longitudinally connected slab ballastless track. However, the high and low temperature stability of the emul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00C04B28/04
Inventor 王金凤张玉贞谭忆秋欧阳剑李云良陈瑶葛勇孟良
Owner CHINA NAT OFFSHORE OIL CORP