Influence Factors on Freezing and Thawing Durability of Cement Asphalt Mortar
Influence Factors on Freezing and Thawing Durability of Cement Asphalt Mortar
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发表时间：
2008
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通讯作者：
Chen Liang
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作者：
Chen Liang
本文研究了水泥乳化沥青砂浆（CA砂浆）的抗冻融性能，并探讨了诸如沥青乳液与水泥的比例（A/C）、水泥类型、各种添加剂等一些影响因素。结果表明，A/C较高的混合物在相对弹性模量（REM）较高方面表现更好。经过350次冻融循环后，A/C为1.4和1.6的混合物的REM分别降至75%和92%。试验后每个混合物都观察到质量增加。用硫铝酸盐水泥（SAC）部分替代普通波特兰水泥（C）配制的混合物在冻融性能方面表现不佳，350次循环后REM为40% - 50%。添加橡胶粉（CRB）、可再分散乳胶粉（P3）、有机纤维（FR）和硅灰（SF）提高了CA砂浆的抗冻融能力，且效果按降序排列。
In this paper,freezing and thawing resistance of CA mortar was investigated and some influential factors such as asphalt emulsion and cement ratio(A/C),cement types,various additives were also explored.Results indicated that mixtures with a higher A/C performed better in terms of higher relative elastic moduli(REM).After 350 cycles of freezing and thawing,REM decreased to 75% and 92% respectively for mixtures of 1.4-A/C and 1.6-A/C.A gain of mass was observed for every mixture after the test.Mixtures proportioned by partially replacing ordinary Portland cement(C) with sulfoalumninate cement(SAC) underperformed in freezing and thawing property,with a¨ REM of 40%—50% after 350 cycles.Addition of crumb rubber powder(CRB),redispersible powder(P3),organic fiber(FR) and silica fume(SF) improved the resistance of CA mortar to freezing and thawing and the effect was in a descending order.