废弃混凝土粉对干混砂浆工作性能的影响分析
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摘要
将废弃混凝土破碎用于干混砂浆,可以实现废弃混凝土的再生利用。通过室内试验对废弃混凝土粉不同替代比例干混砂浆的稠度及稠度损失率、保水性、分层度和凝结时间等指标进行测试,评价干混砂浆的工作性能。测试结果表明,在废弃混凝土粉替代比例为20%时,干混砂浆的稠度、2h稠度损失率以及分层度均达到最佳效果,凝结时间也能满足工程施工的要求,具有良好的工作性能。
The waste concrete is crushed for dry-mixed mortar, which can realize the recycling of abandoned concrete.Through laboratory tests,the consistency, loss of consistency,water retention,stratification and setting time of dry mortar with different proportions of waste concrete powder were tested to evaluate the performance of dry mortar. The test results show that when the substitution ratio of waste concrete powder is 20%,the consistency of dry-mixed mortar,the loss rate of 2 h consistency and the degree of delamination all achieve the best results.The setting time can also meet the requirements of engineering construction and has good working performance.
The waste concrete is crushed for dry-mixed mortar, which can realize the recycling of abandoned concrete.Through laboratory tests,the consistency, loss of consistency,water retention,stratification and setting time of dry mortar with different proportions of waste concrete powder were tested to evaluate the performance of dry mortar. The test results show that when the substitution ratio of waste concrete powder is 20%,the consistency of dry-mixed mortar,the loss rate of 2 h consistency and the degree of delamination all achieve the best results.The setting time can also meet the requirements of engineering construction and has good working performance.
引文
[1]李炳杰,废弃混凝土再利用的研究[J].水泥技术,2015(06):35-38.
[2]谢玲丽,曹春龙,热干混砂浆工作性及性能优化[J].商品混凝土,2015(5):65-67.
[3]张道令,吕常胜,张春涛,等,全组分再生细骨料在干混砂浆中的应用研究[J].混凝土与水泥制品,2017(8):91-94.
[4]王朝强,谭克锋,戴传彬,等.引气剂对粉煤灰基干混砂浆性能的影响[J].混凝土与水泥制品,2014(4):22-27.
[5]谢汝朋,李秋义,曹瑜斌,再生砂制备干混砌筑砂浆保水率的研究[J].混凝土,2017(5):117-120.
[2]谢玲丽,曹春龙,热干混砂浆工作性及性能优化[J].商品混凝土,2015(5):65-67.
[3]张道令,吕常胜,张春涛,等,全组分再生细骨料在干混砂浆中的应用研究[J].混凝土与水泥制品,2017(8):91-94.
[4]王朝强,谭克锋,戴传彬,等.引气剂对粉煤灰基干混砂浆性能的影响[J].混凝土与水泥制品,2014(4):22-27.
[5]谢汝朋,李秋义,曹瑜斌,再生砂制备干混砌筑砂浆保水率的研究[J].混凝土,2017(5):117-120.