Method for preparing cement asphalt (CA) mortar for China railway track system (CRTS) II slab ballastless tracks
A slab ballastless track and mortar technology, which is applied in the field of high-speed railway construction engineering materials, can solve the problems that CA mortar is prone to flooding, high water consumption and additive dosage, and poor fluidity of CA mortar, so as to avoid competitive adsorption and reduce dosage. and water consumption, the effect of increasing strength
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[0023] Examples 1-2: Use 52.5 ordinary cement produced by Conch Cement Plant, polycarboxylic acid high-performance water reducing agent produced by Hangzhou Construction Components Company Admixture Plant, AEA sulphoaluminate expansion agent and organosilicon defoamer , Fine sand with a particle size of 1.18mm, aluminum powder provided by Hangzhou aerated concrete factory, silica sol produced by Zhejiang Yuda Chemical Co., Ltd., with a mass concentration of 30%, pH=9.0, anion produced by Zhejiang Lanting High-tech Co., Ltd. Type ordinary emulsified asphalt to prepare CA mortar. The preparation method of the CA mortar is as follows:
[0024] First, mix cement, expansion agent, aluminum powder and fine sand according to the ratio of each embodiment in Table 1 to prepare dry CA mortar powder, and then add polycarboxylic acid to the water according to the ratio of each embodiment in Table 1. Stirring agent, defoamer and silica sol at slow speed (60rpm) for 10s; adding CA mortar dry ...
Example
[0030] Examples 3-7: Using 52.5 ordinary cement produced by Conch Cement Factory, polycarboxylic acid high-performance water reducing agent produced by Hangzhou Construction Components Company Admixture Factory, AEA sulphoaluminate expansion agent and organosilicon defoamer , Fine sand with a particle size of 1.18mm, aluminum powder provided by Hangzhou aerated concrete plant, silica sol produced by Zhejiang Yuda Chemical Co., Ltd., with a mass concentration of 20%, pH=8.0, anion produced by Zhejiang Lanting High-tech Co., Ltd. Type SBS modified emulsified asphalt to prepare CA mortar. The preparation method of the CA mortar is as follows:
[0031] First, mix cement, expansion agent, aluminum powder and fine sand according to the ratio of each embodiment in Table 2 to prepare dry CA mortar powder, and then add polycarboxylic acid to the water according to the ratio of each embodiment in Table 2. Stirring agent, defoamer and silica sol at slow speed (80rpm) for 5s; adding CA mort...
Example
[0038] Examples 8-9: The 52.5 ordinary cement produced by Jinfeng Cement Plant, the polycarboxylic acid high-performance water reducing agent produced by the Admixture Plant of Hangzhou Construction Components Company, AEA sulphoaluminate expansion agent and silicone defoamer , Fine sand with a particle size of 1.18mm, aluminum powder provided by Hangzhou aerated concrete plant, silica sol produced by Zhejiang Yuda Chemical Co., Ltd., with a mass concentration of 40%, pH=10.0, anion produced by Zhejiang Lanting High-tech Co., Ltd. Type SBR modified asphalt emulsion to prepare CA mortar. The preparation method of the CA mortar is as follows:
[0039] First, mix cement, expansion agent, aluminum powder and fine sand according to the ratio of each embodiment in Table 2 to prepare dry CA mortar powder, and then add polycarboxylic acid to the water according to the ratio of each embodiment in Table 2. Stirring agent, defoamer and silica sol at slow speed (70rpm) for 3s; adding CA mor...
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