摘要
为了定量评价机制砂中粉体的需水量特性,本文提出了一种粉体需水量指数(WDI)及其测定与计算的方法,探究了机制砂粉体WDI的影响因素,以及WDI与混凝土工作性、力学性能之间的关系。结果表明,混凝土的工作性与力学性能均随WDI的增大而降低,扩展度、抗压强度与WDI存在较高的线性相关性,相关系数分别为0.86和0.88。掺入不同黏土矿物调制后机制砂的WDI与混凝土工作性的相关性较高,与强度之间的相关性略低,WDI与机制砂混凝土性能间良好的相关性证明可用于机制砂的分类指标。最后提出了WDI指标的局限性和改进方案。
In order to evaluate the water demand of powder in manufactured sand(MS)quantitatively,a powder water demand index(WDI)as well as its measurement and calculation method was proposed.The influence factors of the WDI of manufactured sand powder were explored,and the relationship between WDI and the workability and mechanical properties of concrete was investigated.The results indicate that the workability and mechanical properties of concrete decrease with the increase of WDI.The correlation coefficient between WDI and slump flow is 0.86,and the correlation coefficient between WDI and compressive strength is 0.88,indicating a good correlation.The manufactured sand mixed with different clay minerals has higher correlation between WDI and concrete workability,while the correlation with strength is slightly lower,therefore,the significant correlation between WDI of MS and MS concrete performance indicate WDI can be used as a classification indicator.Finally,the limitations and improvement technical routs of WDI formula are proposed.
作者
伍文振
孙江涛
李志堂
尚一馨
张稳涛
许伟
沈卫国
WU Wenzhen;SUN Jiangtao;LI Zhitang;SHANG Yixin;ZHANG Wentao;XU Wei;SHEN Weiguo(Poly Changda Engineering Co.,Ltd.,Guangzhou 545000,China;School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China;State Key Laboratory of Silicate Materials for Architectures,Wuhan University of Technology,Wuhan 430070,China;Xiangyang Key Laboratory of Comprehensive Utilization of Massive Solid Waste and Green Building Materials,Xiangyang 441022,China)
出处
《硅酸盐通报》
北大核心
2025年第12期4368-4374,共7页
Bulletin of the Chinese Ceramic Society
基金
保利长大有限公司科技项目(202401hx0141)
“十三五”国家重点研发计划课题(2016YFB0303603)。
关键词
机制砂
粉体
需水量指数
混凝土性能
相关系数
manufactured sand
powder
water demand index
concrete performance
correlation coefficient
