A novel method to evaluate the setting process of cement and asphalt emulsion in CA mortar
A novel method to evaluate the setting process of cement and asphalt emulsion in CA mortar
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评价CA砂浆中水泥和沥青乳液凝结过程的新方法
DOI：
10.1617/s11527-007-9270-9
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发表时间：
2008-05-01
影响因子：
3.8
通讯作者：
Hu, Shuguang
中科院分区：
文献类型：
--
作者：
Wang, Fazhou;Liu, Zhichao;Hu, Shuguang
水泥沥青砂浆（CA砂浆）是新干线板式轨道结构中的关键部件，起着弹性减震的作用。提出了一种评估CA砂浆中水泥沥青乳液（CAE）凝结过程的新方法。研究指出，凝结过程受多种因素控制，比如水泥类型、水泥/沥青乳液比（C/AE比）。结果还表明，水泥含量比例越高，CAE的凝结过程越快；使用早期强度高、水化速度快的水泥，或者使用部分由硫铝酸盐水泥替代普通硅酸盐水泥的混合水泥，或者提高C/AE比，都可以提高CA砂浆的早期强度和降低其分离率。然而，硫铝酸盐水泥替代普通硅酸盐水泥的比例不应超过15%，且C/AE比不应小于0.8。
Cement and asphalt mortar (CA mortar) is the key component in the structure of Shinkansen slab track and serves as the elastic shock-absorber. A new method was put forward to evaluate the setting process of cement and asphalt emulsion (CAE) in CA mortar. It was noted that the setting process was governed by several factors such as cement types, cement/asphalt emulsion ratios (C/AE ratio). Results also indicated that the setting process of CAE was faster, the higher proportion of cement content was; the early age strength and the separation rate of CA mortar could be improved by using cement of high early age strength and rapid hydration rate, or a blended cement with ordinary Portland cement partially replaced by sulfoaluminate cement, or by increasing C/AE ratio. Nevertheless, the replacement ratio of ordinary Portland cement by sulfoaluminate cement should not exceed 15% and C/AE ratio should be not less than 0.8.