水泥基灌浆料工作性的实验
Experimental Study on Workability of Cement-based Grouting Material
张巨松 1李宗阳 1张娜 1杨豹 1门宇1
作者信息
- 1. 沈阳建筑大学材料科学与工程学院,辽宁沈阳110168
- 折叠
摘要
目的 通过研究不同外加剂对水泥基灌浆料工作性的影响,解决工程中高性能灌浆料的高工作性问题.方法 采用高度(60±0.5)mm、上口内径(70±0.5)ram、下口内径(100±0.5)mm、下口外径120 mm的截锥圆模、玻璃板、直尺等工具,依据《GB/T2419水泥胶砂流动度测试方法》对水泥基灌浆料进行流动性测试.结果 硫铝水泥基灌浆料与普硅水泥基灌浆料相比,其初始流动度与30 min流动度较好,且最小水胶比为0.21.采用萘系、聚羧酸,SM(均为固体)减水剂的硫铝水泥基灌浆料,在初始流动度大于300 mm的前提下,最小水胶比分别为0.26、0.21、0.27.硫铝水泥基灌浆料随着聚羧酸减水剂掺量的增加,初始流动度和30 min后的流动度均明显增加,最佳掺量在3‰ ～ 5‰.缓凝剂掺量的增加对硫铝水泥基灌浆料的初始流动度影响不明显,对其30 min后的流动度影响较为突出,最佳掺量不超过6‰.结论 测定硫铝水泥与普硅水泥基灌浆料的工作性,结果相差较大,说明水泥物理化学性质对减水剂的适应性产生较大影响;外加剂对水泥基灌浆料的流动度影响显著,宜控制在合理范围之内.
Abstract
The paper researches on workability of cement-based grouting material with different admixture,solves the problem of high workability of high performance grouting material in engineering.The frustum round mold is height of (60 ± 0.5) nun,catchy inner diameter of (70 ± 0.5) mm,under the port inner diameter of (100 ±0.5)mm,under the port outside diameter of 120 mm,glass board and ruler are applied to make the fluidity test by "Test method for fluidity of cement mortar".Compared Sulphoaluminate cementbased grouting material with Portland cement-based grouting material,the biggest initial fluidity and 30min fluidity are preferable,and the lowest water-cement ratio is 0.21.Naphthalene superplasticizer,Polycarboxylate superplasticizer and SM are applied to Sulphoaluminate cement-based grouting material,the lowest water-cement ratio is 0.26、0.21、0.27 respectively on the premise of initial fluidity more than 300 ram.The initial fluidity and 30 min fluidity increase obviously with increasing of content of Polycarboxylate superplasticizer,the best dosage is in 3‰～ 5‰.The initial fluidity of Sulphoaluminate cement-based grouting material with different content of retarder does not appear obvious effect,but 30min fluidity increases significantly,the best dosage is less than 6‰.The result that workability of Sulphoaluminate cement-based grouting material and Portland cement-based grouting material are different shows that the effect of Physical and chemical properties of cement on suitability of superplasticizer is significant.The content of admixture should control in a reasonable range because the effect of workability of cement-based grouting material on admixture is important.
关键词
水胶比/水泥基灌浆料/高效减水剂/缓凝剂Key words
water-cement ratio/cement-based grouting material/superplasticizer/retard引用本文复制引用
出版年
2013
NETL
NSTL
维普
万方数据