Prediction and Optimization of Self-Consolidating Concrete Properties

被引:13
作者
Elemam, Walid E. [1 ]
Abdelraheem, Ahmed H. [1 ]
Mandy, Mohamed G. [1 ,2 ]
Tahwia, Ahmed M. [1 ]
机构
[1] Mansoura Univ, Fac Engn, Struct Engn Dept, Mansoura, Egypt
[2] Mansoura Univ, Fac Engn, Educ & Student Affairs, Mansoura, Egypt
关键词
central composite design (CCD); compressive strength; flex-ural strength; optimization; response surface methodology (RSM); self-consolidating concrete (SCC); RESPONSE-SURFACE METHODOLOGY; COMPACTING CONCRETE; COMPRESSIVE STRENGTH; LIMESTONE POWDER; ASH; HYDRATION; DESIGN; SCC; PERMEABILITY; MIXTURES;
D O I
10.14359/51733149
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
This investigation aims to predict and optimize self-consolidating the total powder content. Total powder content (P), proportion of and proportion of high-range water-reducing admixture (HRWRA) were the input parameters of the mixtures, and the desirable responses were slump flow, 7- and 56-day compressive strength, and flexural strength. A total of 90 concrete mixtures were designed using the central composite design (CCD) concept in Minitab 18 statistical software under response surface methodology (RSM) to simulate and optimize the variables and responses of models. Results showed that high relation can be developed between the responses and the constituent materials in predicting characteristics of SCC, removing the drudgery of repetitive laboratory testing and enabling rapid decision-making for building applications. The slump flow increased with the increase in total powder content, FA content, w/p, and HRWRA dosage and decrease in SF content, while LP has insignificant effect on slump flow results. The increase in partial replacement of cement by FA decreased the compressive strength of mixtures at early ages. The higher values of compressive strength were observed when SF incorporated in higher levels, and flexural strength also enhanced with the increase in SF content.
引用
收藏
页码:91 / 104
页数:14
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