Influence of Sulfoaluminate Cement Addition on the Early Age Properties of CA Mortar
CA mortar is a composite material with equal presence of cement and asphalt emulsion and acts as a cushion layer in the structure of slab track. When it is applied in cold region, strength gain can be notably impaired due to the lower degree of cement hydration at low temperatures. In the paper, Portland cement (PC) is partially replaced by sulfoaluminate cement (SAC) with much faster hydration rate. Results indicate that the initial fluidity of CA mortar is slightly undermined with partial replacement from 0％-100％, but the workable time is decreased dramatically, especially when the replacement ratio (RMR) reaches 40％. A binary system of SC and PC reduces both the expansion rate and separation rate of CA mortar to varying degrees. 1d compressive strength of CA mortar fluctuates around 0.2-0.3 MPa, within 60％ replacement of PC by SAC, followed by a sharp increase at 70％ RMR and an equally noticeable decrease after RMR reaches 80％.
CA mortar sulfoaluminate cement early age properties compressive strength
Liu Zhichao Wang Fazhou Zhang Yunhua Hu Shuguang
Key Laboratory of Silicate Materials Science and Engineering of Ministry of Education, Wuhan University of Technology, 430070, Wuhan
国际会议
6th Asian Symposium on Polymers in Concrete(第六届亚洲聚合物混凝土国际会议)
上海
英文
523-529
2009-10-29（万方平台首次上网日期，不代表论文的发表时间）