摘要
通过水洗海砂与机制砂复配,研究了复配细骨料棱角性、二维形状指数、分形维数、细度模数的变化及其对C30混凝土工作性、力学性能和流变性参数的影响规律。结果表明,随着复配细骨料棱角性和二维形状指数增大,C30新拌混凝土的屈服应力和黏度系数也会随之增大。此外,通过多参数线性回归分析,建立了流变性预测模型,并探讨了主要参数与流变模型的相关性。
Through the combination of washed sea sand and machine sand,the influence of the variation of angularity,two-dimensional shape index,fractal dimension and fineness modulus of composite fine aggregate on the working performance,mechanical properties and rheological parameters of C30 concrete were studied.The results show that the yield stress and viscosity coefficient of C30 fresh concrete increase with the increase of the angularity and the two-dimensional shape index of the composite fine aggregate.In addition,through multi-parameter linear regression analysis,a rheological prediction model was established,and the correlation between the main parameters and the rheological model was discussed.
作者
国诚
水中和
费洗非
郭伟
GUO Cheng;SHUI Zhong-he;FEI Xi-fei;GUO Wei(School of Materials Science Engineering,Wuhan University of Technology,430070,China;State Key Laboratory of Silicate Materials for Architecture,Wuhan University of Technology,430070,China;Zhuhai Chunhe New Material Research Institute,519000,China)
出处
《混凝土与水泥制品》
北大核心
2020年第7期21-25,29,共6页
China Concrete and Cement Products
基金
国家自然科学基金(51679179)
中山市2019年高端科研机构创新专项项目(2019AG010)。
关键词
棱角性
二维形状指数
线性回归
流变模型
Angularity
2D shape index
Linear regression
Rheological model
