期刊论文

Zheng, K.-R.(zhengkeren@csu.edu.cn)

中文

建筑材料学报

1007-9629

2013

16

5

817-823+828

10.3969/j.issn.1007-9629.2013.05.014

基金项目：国家自然科学基金资助项目（50978257） 国家重点基础研究发展计划（973计划）项目（2013CB036201）

本校为其他机构

基于水泥乳化沥青砂浆充填层服役环境条件,测试了干燥、气干以及饱水状态下CRTS I型水泥乳化沥青砂浆在-20～60℃时的热变形.结果表明:湿含量对水泥乳化沥青砂浆的热变形行为具有显著影响,非干燥状态水泥乳化沥青砂浆的热变形是自身组分热变形、内部水相态转变及蒸发所导致的体积变形的综合表现;在升温过程中,水泥乳化沥青砂浆内部水向外迁移引起显著的收缩变形,这种收缩变形导致非干燥状态水泥乳化沥青砂浆在20℃左右出现热收缩现象;在饱水条件下,冰一水相变产生的体积收缩导致水泥乳化沥青砂浆在-5～5℃时产生显著的收缩.

In order to know influence of inner moisture on thermal deformation of cement and emulsified-asphalt mortar, change in length of specimens under different inner moisture conditions, namely vacuum dried, air dry and water saturated, was measured from -20°C to 60°C. Results show that the inner moisture has a significant influence on thermal deformation of cement and emulsified-asphalt mortar. The evaporation of inner moisture causes shrinkage notably as temperature rises. This shrinkage reduces its thermal expansion coefficient and can even lead to a negative thermal expansion around 20&...