不同石粉含量机制砂对混凝土性能影响关键技术研究  

Study on Key Techniques of the Influence of Sand with Different Stone Powder Content on Concrete Properties

作　　者：孙露 丁继辉[2] 石瞳希 郭超 单良玉 王宇宁 Sun Lu;Ding Jihui;Shi Tongxi;Guo Chao;Shan Liangyu;Wang Yuning(Liaoning Vocational College of Ecology Engineering,Shenyang 110000,China;College of Agricultural Science and Engineering,Hohai University,Nanjing 210098,China;Liaoning Water Resources Management Group,Shenyang 110000,China;Liaoning Provincial Department of Water Resources,Shenyang 110000,China;Zhuanghe City Water Bureau,Dalian 116400,China)

机构地区：[1]辽宁生态工程职业学院,沈阳110000 [2]河海大学农业科学与工程学院,南京210098 [3]辽宁省水资源管理集团,沈阳110000 [4]辽宁省水利厅,沈阳110000 [5]庄河市水务局,辽宁大连116400

出　　处：《黑龙江科学》2025年第6期12-15,18,共5页Heilongjiang Science

基　　金：国家自然科学基金项目(51879074);辽宁省辽河干流防洪提升工程;辽宁省教育厅2021年高等职业院校开放办学合作项目辽教办[2021]360号。

摘　　要：开展了基于机制砂中不同百分比含量的石粉物质对混凝土性能可能产生的影响研究。结果表明,在机制砂混凝土试配过程中,适当比例的石粉物质含量对颗粒级配的完善具有正效应,可填充拌和物颗粒物间留有的空隙,提高有效浆体数量,其综合效应改善了混凝土拌和物的工作性能(可塑性、粘聚性、流动性、保水性、易密性和稳定性等),提高了机制砂混凝土的强度。若试配不同等级的混凝土,其最优石粉含量区间是有所区别的,对于低强度混凝土来说,最佳石粉含量宜控制在10%~15%,而对于高强度混凝土来说,最佳石粉含量宜控制在7%~10%。The study analyzes the possible effect of different percentage of stone powder in machine-made sand on the performance of concrete.The results show that,in the trial mixing process of machine-made sand concrete,the appropriate proportion of stone powder material content has positive effect on the perfection of particle composition.It can fill the gaps left between the particles of the mix and increase the number of effective slurry.Its comprehensive effect improves the performance of concrete mixes(plasticity,cohesiveness,fluidity,water retention,densification and stability,etc.),and improves mechanism sand concrete strength.If different grades of concrete are tested,the optimal stone powder content interval is different.For low strength concrete,the best stone powder content should be controlled at 10%~15%,and for high strength concrete,the best stone powder content should be controlled at 7%~10%.

关 键 词：机制砂 石粉含量 混凝土 配合比 强度 

分 类 号：TU528[建筑科学—建筑技术科学]