Effects of Sand/Fly Ash and the Water/Solid Ratio on the Mechanical Properties of Engineered Geopolymer Composite and Mix Design Optimization

Minerals

Nasir Shafiq¹  Muhammad Zahid¹ 

[1] Department of Civil and Environmental Engineering, University Technology Petronas, Seri Iskandar 32610, Malaysia;

关键词: engineered geopolymer composite;    sand/fly ash ratio;    water/geopolymer solid ratio;    response surface methodology;    statistical modeling;    fly ash;   

DOI  :  10.3390/min10040333

来源: DOAJ

【 摘 要 】

This paper presents the results of an experimental study that investigated the effects of two parameters: sand/fly ash (S/FA) ratio and water to geopolymer-solid (W/GS) ratio on the engineered geopolymer composite. The trial mix designs were optimized using the response surface method. These parameters influence the properties of the fresh and hardened geopolymer matrix, such as slump flow, compressive strength, flexural strength, elastic modulus, flexural toughness, ductility index and drying shrinkage. The optimizing process was conducted by developing statistical models using the response surface methodology (RSM) technique. The developed models were statistically validated and could be used to determine the desired response of engineered geopolymer composite (EGC) with a significance level of more than 95%. In this study, the optimized values of the S/FA ratio and W/GS ratio were obtained as 0.341701 and 0.225184, respectively. To validate the optimized S/FA ratio and W/GS ratio, an experimental study was performed, and a difference of less than 5% was found between predicted and experimental results.

【 授权许可】

Unknown