硅酸盐通报2023，Vol.42Issue(12)：4298-4308,11.
基于流变参数多样本统计的自密实混凝土稳定性及均匀性分析方法
Analyzing Methods for Stability and Homogeneity of Self-Compacting Concrete Based on Rheological Parameters of Multiple Samples Statistics
摘要
Abstract
Self-compacting concrete with high fluidity and compactness is often used in the special engineering structures such as concrete-filled steel tubes.However,its preparation and construction process are highly susceptible to complex factors at the engineering site,resulting in uncontrollable fluctuations in its workability.There is still a lack of analytical control methods based on essence of rheology.This paper makes an analysis of the rheological parameters of concrete according to the data collected from actual engineering sites.The results show that the rheological parameters of concrete well conform to a log-normal distribution under multiple sample conditions.Besides,an analysis of the overall concrete stability was carried out according to the 95％ confidence interval of the samples,using (¯τ)s0∈[194.75,225.76]∩ (¯μ)∈[88.76,95.00]as a criterion for good concrete stability,and the rheological parameters of concrete adjusted on site were analyzed along with the flow behavior of concrete in the pump pipe.The direction of rheological property regulation was discussed,and methods for optimizing pumpability ranges(τs0 =[54.17,391.76]∪μ =[52.77,126.66])and rheological parameters were proposed based on concrete rheological parameters.By revealing the inherent homogeneity of the concrete through the analysis of the characteristics of the rheological parameter curves,the paper proposed a criterion for the homogeneity evaluation of self-compacting concrete on site,providing a theoretical basis for the homogeneity evaluation,rheological property regulation and mix proportion design of self-compacting concrete.关键词
自密实混凝土/均匀性/稳定性/流变参数/施工质量控制/多样本统计Key words
self-compacting concrete/homogeneity/stability/rheological parameter/construction quality control/multiple sample statistics分类
建筑与水利引用本文复制引用
韦强,高强,卢福洲,陈亮胜,陈犇,赵国欣,李静,陈正..基于流变参数多样本统计的自密实混凝土稳定性及均匀性分析方法[J].硅酸盐通报,2023,42(12):4298-4308,11.基金项目
国家重点研发计划(2021YFB2600903) （2021YFB2600903）
