Meta-analysis of studies on eggshell concrete using mixed regression and response surface methodology

Beng, Wei Chong and Rokiah, Othman and Putra Jaya, Ramadhansyah and Xiaofeng, Li and Mohd Rosli, Mohd Hasan and Mohd Mustafa Al Bakri, Abdullah (2021) Meta-analysis of studies on eggshell concrete using mixed regression and response surface methodology. Journal of King Saud University - Engineering Sciences. pp. 1-20. ISSN 1018-3639. (In Press) (In Press)

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Eggshell concrete is an innovative green material that helps to recycle eggshell waste while reducing the environmental harm caused by excessive cement production. However, recent studies on eggshell concrete are limited and the outcomes may vary due to the variation of mix design. Design of experiment is used to simplify and optimize the study of sustainable concrete, yet analysis involving eggshell concrete is still scarce. This paper aimed to develop mathematical models for the prediction of eggshell concrete compressive strength using the mixed regression (MR) and response surface methodology (RSM). Overall, 43 datasets were collected from available studies in the literature on eggshell powder as partial cement replacement. The input variables used were percentage of eggshell, percentage of Ground Granulated Blast-furnace Slag (GGBS), cement content, fine aggregate, coarse aggregate, water, and Conplast SP-430 superplasticizer. The analysis of contour plot concluded that eggshell powder increased the concrete compressive strength at an optimal replacement percentage between 5% and 10%. However, the cement partial replacement with eggshell powder is more optimal for mix design with higher water content. The statistical results of the model, such as R2, adjusted R2 and root-mean-square error (RMSE), indicated that both MR and RSM models are powerful tools to formulate and predict the eggshell concrete compressive strength. However, RSM models showed better accuracy and lower deviation.

Item Type: Article
Uncontrolled Keywords: RDU200349,PGRS200370.
Subjects: T Technology > TH Building construction
Faculty/Division: Institute of Postgraduate Studies
College of Engineering
Faculty of Civil Engineering Technology
Depositing User: PM Dr. Ramdhansyah Putra Jaya
Date Deposited: 07 May 2021 06:47
Last Modified: 07 May 2021 06:47
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