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大掺量矿物掺合料自密实混凝土工作性能研究

作者：周聪聪1，杨浩2，3，李允冠4，胡名卫1，俞毅1，应晓猛1，祝志雄1

关键字：大掺,量,矿物,掺合,料自,密实,混凝土,工作,

　
[1.浙江省建筑材料科学研究所有限公司，浙江 杭州  311000；
2.广西同和投资集团有限责任公司，广西 南宁  530022；
3.南宁浮法玻璃有限公司，广西 南宁  530022；
4.德清县发展新型墙体材料（散装水泥）中心，浙江 德清  313200]
    摘要：分别采用粉煤灰单掺（0~40%）、矿粉单掺（0~40%）及二者复掺（总掺量40%）作为矿物掺合料等量替代水泥，研究大掺量矿物掺合料对自密实混凝土工作性能的影响。结果表明，当粉煤灰掺量为30%时，浆体的流动度最大；当矿粉掺量为10%时，浆体的流动度最大；粉煤灰和矿粉的掺入都会使自密实混凝土浆体包裹性能更好，同时浆体稠度提高，增加流动的阻力，单掺粉煤灰30%，单掺矿粉10%分别能达到自密实混凝土流动性能最佳状态；30%粉煤灰+10%矿粉复掺时，自密实混凝土的流动性能达到最佳状态。
    关键词：自密实混凝土；矿物掺合料；大掺量；工作性能
    中图分类号：TU528.041        文献标识码：A        文章编号：1001-702X（2020）05-0010-03
 
Research on working performance of self-compacting concrete with large amount of mineral admixture
ZHOU Congcong1，YANG Hao2，3，LI Yunguan4，HU Mingwei1，YU Yi1，YING Xiaomeng1，ZHU Zhixiong1
[1.Zhejiang Institute of Building Materials Science Co. Ltd.，Hangzhou 311000，China；
2.Guangxi Tonghe Investment Group Co. Ltd.，Nanning 530022，China；
3.Nanning Float Glass Co. Ltd.，Nanning 530022，China；
4.New Wall Materials（Bulk Cement） Centre in Deqing County，Deqing 313200，China]
    Abstract：The influence of large amount of mineral admixtures on the working performance of self-compacting concrete was studied by selecting fly ash and mineral powder as the admixtures to replace cement in equal amount，and takes single admixture of fly ash（0~40%），single admixture of mineral powder（0~40%） and combined admixture of fly ash and mineral powder（total amount 40%） respectively. The experimental results show that when the content of fly ash is 30%，the fluidity of slurry is the largest；when the content of mineral powder is 10%，the fluidity of slurry is the largest；the incorporation of fly ash and mineral powder will make the wrapping performance of the self-compacting concrete slurry better，and at the same time the consistency of the slurry will increase，increasing the flow resistance. 30% of fly ash and 10% of mineral powder respectively can make the flow performance of self-compacting concrete reach the best state；the flow performance of self-compacting concrete can reach the best state when a large amount of fly ash（30%） and mineral powder（10%） are added.
    Key words：self-compacting concrete，mineral admixture，large amount，working performance