Cement asphalt mortar with high elastic damping

A technology of mortar and cement, which is applied in the field of cement asphalt mortar, can solve the problems of low early strength of cement emulsified asphalt mortar, poor stability of emulsified asphalt, and needs to be improved, so as to improve crack resistance, volume stability, stable performance, and good damping performance effect

Active Publication Date: 2012-02-01
CHINA NAT OFFSHORE OIL CORP +2
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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

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Experimental program
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Effect test

Embodiment 1

[0024] Embodiment 1, the preparation of cement asphalt mortar

[0025] (1) Preparation of dry powder: mix P I 42.5 cement, UEA expansion agent, river sand (fineness modulus 1.4), aluminum powder (200 mesh) and rubber powder (30 mesh particle size) and stir evenly to obtain dry powder ; Wherein, the ratio of mass and number 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 silicone defoamer and stir evenly to obtain a liquid mixture, and put the liquid mixture into the dry powder obtained in the previous step The cement asphalt mortar can be obtained after being stirred evenly in the material; wherein, the mass-number ratio of PI 42.5 cement, UEA expansion agent, river sand, emulsified asphalt, water, water reducer, defoamer, aluminum powder and rubber powder is 90: 10:132:37:19:1...

Embodiment 2

[0028] Embodiment 2, the 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 1.4), aluminum powder (200 mesh), rubber powder (200 mesh particle size) and polypropylene fiber Obtain dry powder evenly; Wherein, the mass and number 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 silicone defoamer and stir evenly to obtain a liquid mixture, and put the liquid mixture into the dry powder obtained in the previous step The cement asphalt mortar can be obtained by mixing it evenly in the material; among them, the mass parts of P I 52.5 cement, UEA expansion agent, river sand, emulsified asphalt, water, water reducer, defoamer, aluminum powder, rubber po...

Embodiment 3

[0032] Embodiment 3, the preparation of cement asphalt mortar

[0033] (1) Preparation of dry powder: PII42.5 cement, UEA expansion agent, river sand (fineness modulus is 1.4), aluminum powder (200 mesh), rubber powder (particle size is 150 mesh) and polypropylene fiber are mixed and Stir evenly to obtain dry powder; wherein, the mass-number 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 silicone defoamer and stir evenly to obtain a liquid mixture, and put the liquid mixture into the dry powder obtained in the previous step The cement asphalt mortar can be obtained by mixing it evenly in the material; among them, the mass parts of PII 42.5 cement, UEA expansion agent, river sand, emulsified asphalt, water, water reducer, defoamer, aluminum powder, rubbe...

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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 railway, urban high-speed light rail and urban subway. Background technique [0002] Chinese patent application 200710149995.8, Chinese patent application 200710078508.3 and Chinese patent application 200710078480.3 respectively disclose a kind of emulsified asphalt, which all adopt the combination of cationic emulsifier and nonionic emulsifier as emulsifier to prepare emulsified asphalt, and some emulsified asphalt has been carried out in practice Applied, works well. But above-mentioned emulsified asphalt is used in cement emulsified asphalt mortar of unit slab ballastless track, but is not applicable to cement emulsified asphalt mortar of longitudinally connected slab ballastless track. [0003] Chinese patent 200910076818.0 discloses a kind of emulsified asphalt, which is used for longitudinal connecting slab ballastless track. H...

Claims

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Application Information

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Patent Type & Authority Applications(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
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