| 高吸水性树脂对水泥砂浆体积收缩及力学性能的影响 |
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| 引用本文： | 孔祥明,李启宏.高吸水性树脂对水泥砂浆体积收缩及力学性能的影响[J].硅酸盐学报,2009,37(5). |
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| 作者姓名： | 孔祥明 李启宏 |
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| 作者单位： | 清华大学土木工程系,结构工程与振动教育部重点实验室,北京,100084 |
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| 基金项目： | 国家科技支撑计划，国家自然科学基金，清华大学骨干人才基金 |
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| 摘 要： | 将自行研制的高吸水性树脂加入砂浆配方,研究了高吸水树脂对不同水灰比下新拌砂浆的流动度、砂浆存下燥养护过程中的体积收缩以及力学性能的影响.研究发现:高吸水性树脂的加入一定稃度上降低了砂浆的流动度:砂浆在干燥养护时,在水灰比(质量比)为0.5~0.7范围内,砂浆的总体积收缩与水灰比关系不大,高效减水剂多聚羧酸酯的加入能增大砂浆的体积收缩;在水灰比为0.5～0.6的砂浆下燥养护时,将高吸水性树脂加入到砂浆中町以明显减小其体积收缩;而对水灰比为0.7的高水灰比砂浆的体积收缩改善作用不明显;对于水灰比为0.7的高水灰比砂浆,高吸水性树脂的加入导致其二次浸水时的吸水率增大.此外高吸水性树脂的加入能提高十燥情况下养护后砂浆的力学性能,尤其在较低水灰比的砂浆中作用更为明显.
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| 关 键 词： | 高吸水性树脂 水泥砂浆 体积收缩 力学性能 水灰比 |
INFLUENCE OF SUPER ABSORBENT POLYMER ON DIMENSION SHRINKAGE AND MECHANICAL PROPERTIES OF CEMENT MORTAR |
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| KONG Xiangming,LI Qihong.INFLUENCE OF SUPER ABSORBENT POLYMER ON DIMENSION SHRINKAGE AND MECHANICAL PROPERTIES OF CEMENT MORTAR[J].Journal of The Chinese Ceramic Society,2009,37(5). |
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| Authors: | KONG Xiangming LI Qihong |
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| Affiliation: | Key Laboratory of Structural Engineering and Vibration of China Education Ministry;Department of Civil Engineering;Tsinghua University;Beijing 100084;China |
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| Abstract: | The effects of the addition of self-prepared super absorbent polymer(SAP) on the properties of cementitious mortar formulations with varied water-cement ratios(m(w)/m(c),in mass) were studied.The degree of fluidity of fresh mortar,dimension shrinkage of hardening mortars during dry curing conditions and the mechanical properties of hardened mortars were measured in order to investigate the impact of SAP on the properties of mortars.It was found that the addition of SAP leads to a decrease of the degree of f... |
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| Keywords: | super absorbent polymer cementitious mortar dimension shrinkage mechanical property water-cement ratio |
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