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水和温度作用下水泥乳化沥青砂浆的动态力学性能研究
作者：朱兵1，宋昊1，2
（1.合肥水泥研究设计院有限公司，安徽 合肥 230051；2.中南大学 土木工程学院，湖南 长沙 410075）
摘要：采用尺寸为17.21 mm×10 mm×2.5 mm 的水泥乳化沥青砂浆（CA砂浆）薄片，将其真空饱水和真空干燥。利用DMA Q800动态力学分析仪研究了CA砂浆在-40~60 ℃和6 Hz荷载频率下动态力学性能随温度的发展规律。试验结果表明：在温度较低时，饱水试件由于冰的存在使得储存模量E'、损耗模量E"和损耗因子tanδ都明显高于干燥试件和气干试件；随着温度的升高，饱水试件的E'和E"都迅速减小，而干燥和气干试件的E'逐渐减小、E"先增大后减小，最终三者的E'和E"趋于接近；饱水试件的tanδ先减小后增大再减小，气干试件的tanδ先增大后减小，干燥试件的tanδ逐渐增大。
关键词：水泥乳化沥青砂浆；储存模量；损耗模量；损耗因子；饱水状态
中图分类号：TU57+8.1 文献标识码：A 文章编号：1001-702X（2022）06-0006-06
Dynamic mechanical properties of cement emulsified asphalt mortar under the action of water and temperature
ZHU Bing1，SONG Hao1，2
（1.Hefei Cement Research and Design Institute Co. Ltd.，Hefei 230051，China；
2.School of Civil Engineering，Central South University，Changsha 410075，China）
Abstract：The size of cement emulsified asphalt mortar（CA mortar） chips is 17.21 mm×10 mm×2.5 mm. The chips were dried and saturated by water in the vacuum chamber. The dynamic mechanical properties with temperature of CA mortar in the temperature range of -40~60 ℃ and at 6 Hz was studied by dynamic mechanical analyzer DMA Q800 developped by TA Instruments. The results show that at low temperature，the storage modulus E'，loss modulus E" and loss factor tanδ of the saturated specimens are significantly greater than those of dry and air dried specimens due to the existence of ice. With the increase of temperature，both E' and E" of saturated specimens decrease rapidly，while E' of dry and air dried specimens decreases gradually，E" first increases and then decreases，and finally E' and E" of the three specimens tend to be close. The tanδ of the water saturated specimen decreases first and then increases and then decreases，the tanδ of the air dried specimen increases first and then decreases，and the tanδ of the dried specimen increases gradually.
Key words：cement emulsified asphalt mortar，storage modulus，loss modulus，loss factor，saturated state