养护温度及方式对含石膏白云岩骨料成型的砂浆试件膨胀率的影响

Effects of curing temperature and methods on expansion rate of mortar specimens formed with gypsum dolomite aggregate

试验研究了不同养护温度和养护方式对含石膏白云岩骨料成型的砂浆试件膨胀率的影响,并应用XRD分析测试方法,分析砂浆试件内部硫酸盐侵蚀产物,揭示砂浆试件膨胀的原因。

Expansion rates of the mortar made by the gypsum-contaminated dolomite aggregates are studied under different temperatures and curing conditions. Some samples are analyzed with XRD. It is shown that the internal sulfate attack induced by gypsum-contaminated dolomite aggregates happens and ettringite is produced. So the expansion rates of the mortar progress gradually.