灌浆墙体用膨胀珍珠岩砂浆研究.pdfVIP

学兔兔 中国科技核心期刊 新 建魄 灌浆墙傩用膨胀玲璃岩础浆砜究 牛艳芳 z，苏宇峰 ，杨正宏 (1．同济大学先进土木工程材料教育部重点实验室，上海 201804 2．先进土木工程材料协同创新中心，上海 201804) 摘要：通过正交试验研究了胶骨比、膨胀珍珠岩种类、乳胶粉掺量、纤维素醚掺量和减水剂掺量对灌浆墙体用膨胀珍珠岩砂浆 物理力学性能的影响。配制的流动度175 mm、干表观密度520kg／m3、抗压强度4．13 MPa、吸水率18．52％的砂浆，满足墙体灌浆材料 要求。进一步研究了砂浆抗压强度、吸水率与干密度的关系，结果表明，砂浆的抗压强度与干密度呈正相关线性关系，而吸水率随干 密度增大而急剧减小，呈幂次方关系。 关键词：灌浆墙体；膨胀珍珠岩砂浆；正交试验 中图分类号：TU55 1．34 文献标识码：A 文章编号：1001—702X(20i4)l1-0070—03 Use of expanded perHte aggregate in cement mortar for grouting wall M Yanfangl ，SU l，咖ng： ，YANG Zhenghong (1．Key Laboratory of Advanced Engineering Materials of the Ministry of Education，Tongji University，Shanghai 201804，China： 2．Collaborative Innovation Center of Advanced Engineering Materials，Shanghai 201804，China) Abstract：The influences of binder to aggregate ratio，types of expanded perlite aggregate，dosages of emulsion powder， cellulose ether and water reducing agent on the physical and mechanical properties of the expanded perlite mortars were studied by an orthogonal array experiment．The best mortar system performed a fluidity of 175 mm，dry apparent density of 520 kgCm ， compressive strength of 4．13 MPa and water absorption of 18．52％，which can well meet the requirementsof grouting wal1．The results also indicated that the compressive strength of mortar shown a strong positive linear correlation with its dry density， however，the water absorption of mortar sharply decreased with the increase of the dry density followed a power function mode1． Key words：grouting wall；expanded