中文摘要：

为探究传统碱–碳酸盐反应（ACR）机理和碱活性碳酸盐骨料在地质聚合物中的反应行为，对比研究了含纯白云石（YT）和含加拿大 Kingston 白云质灰岩（CK）地质聚合物砂浆分别在不同养护条件[室温相对湿度（RH）大于 95%、38 ℃时 RH〉95%和 80 ℃时 1mol/L NaOH 溶液]下的变形行为。结果显示：YT 在 3 种养护条件地质聚合物中仅起填料作用而使砂浆收缩略有减小；含 CK 地质聚合物砂浆随温度和/或碱度变化呈现显著不同的变形行为，特别是在 38 ℃、RH 〉 95%和 80 ℃、1 mol/L NaOH 溶液条件下分别于不同养护阶段产生微小膨胀；预示 CK 在地质聚合物体系中的反应机制可能与硅酸盐水泥体系中的显著不同，通过选择特定的碳酸盐骨料和养护条件，可望实现地质聚合物体系变形的调控

英文摘要：

For understanding the alkali-carbonate reactivity in geopolymer and the mechanism of traditional alkali-carbonate reaction （ACR）, the deformation behavior of geopolymer mortar with pure dolomite （YT） and dolomitic limestone from Kingston, Canada （CK） was studied by curing at different conditions, i.e. room tenaperature with over 95% relative humidity （RH）, 38 ℃ RH 〉 95% and 80 ℃ 1 mol/L NaOH. Results show that, at the three curing conditions, YT only acts as a filler to slightly reduce the shrinkage of the mortar; The deformation behavior of geopolymer mortar with CK varies remarkably with the changes in the curing temperature and alkalinity, especially the mortars with CK expand slightly at different curing stages when cured at 38 ℃ RH〉95% and 80 ℃ 1 mol/L NaOH; it suggests that the reaction mechanism of CK in geopolymer may be quite different with that in cement system, and the shrinkage of geopolymer might be compensated by selecting special carbonate aggregate and curing conditions.