Cover Image

Central composite design application in the optimization of the effect of pumice stone on lightweight concrete properties using RSM

Among other lightweight aggregates, one choice is pumice stone (PS), which can replace coarse aggregates in concrete. In this study, the natural coarse aggregates are replaced by various per-centages of PS in concrete to examine its physical and mechanical properties. Experiments are designed to pre...

Full description

Saved in:
Bibliographic Details
Main Authors: Ali, Mujahid, Kumar, Abhinav, Yvaz, A., Salah, Bashir
Format: Article
Published: Elsevier 2023
Subjects:
TA Engineering (General). Civil engineering (General)
Online Access:http://eprints.um.edu.my/38453/
Tags: Add Tag
No Tags, Be the first to tag this record!
id my.um.eprints.38453
record_format eprints
spelling my.um.eprints.384532023-07-04T06:28:39Z http://eprints.um.edu.my/38453/ Central composite design application in the optimization of the effect of pumice stone on lightweight concrete properties using RSM Ali, Mujahid Kumar, Abhinav Yvaz, A. Salah, Bashir TA Engineering (General). Civil engineering (General) Among other lightweight aggregates, one choice is pumice stone (PS), which can replace coarse aggregates in concrete. In this study, the natural coarse aggregates are replaced by various per-centages of PS in concrete to examine its physical and mechanical properties. Experiments are designed to prepare mixtures (by varying ratios of PS) using response surface methodology (RSM). Slump and compaction factor tests are used to investigate the fresh properties, such as the workability of concrete. In contrast, the hardened concrete properties are determined using compressive strength (CS), flexural strength (FS), and split tensile strength (STS). The experi-mental, optimization and validation of the model results show that up to 30% of the PS can be replaced in the lightweight aggregate concrete for 7 - 56 curing days in which the CS is greater than 15 MPa, STS is 7-12% of the CS, and FS is 9 - 11% of the CS. Therefore, the optimum CS for the current study ranges from 17 to 20 MPa, in which the STS is 9.39 - 10.54% of the CS, and FS ranges from 17.49% to 21.12% of the CS. The quadratic model was proposed, and the ANOVA and model fitness was produced through RSM, with the coefficient of determination (R2) above 0.99 (99%) for all three responses representing the high importance of the suggested model. Besides, the difference among the R2 and adjusted R2 was negligible, and the P-Value for CS, STS, and FS was below 0.05 (<0.0001), indicating the model's high relevance. RSM was used to improve the model, which was then verified in further lab trials. Elsevier 2023-07 Article PeerReviewed Ali, Mujahid and Kumar, Abhinav and Yvaz, A. and Salah, Bashir (2023) Central composite design application in the optimization of the effect of pumice stone on lightweight concrete properties using RSM. Case Studies in Construction Materials, 18. ISSN 2214-5095, DOI https://doi.org/10.1016/j.cscm.2023.e01958 <https://doi.org/10.1016/j.cscm.2023.e01958>. 10.1016/j.cscm.2023.e01958
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
topic TA Engineering (General). Civil engineering (General)
spellingShingle TA Engineering (General). Civil engineering (General)
Ali, Mujahid
Kumar, Abhinav
Yvaz, A.
Salah, Bashir
Central composite design application in the optimization of the effect of pumice stone on lightweight concrete properties using RSM
description Among other lightweight aggregates, one choice is pumice stone (PS), which can replace coarse aggregates in concrete. In this study, the natural coarse aggregates are replaced by various per-centages of PS in concrete to examine its physical and mechanical properties. Experiments are designed to prepare mixtures (by varying ratios of PS) using response surface methodology (RSM). Slump and compaction factor tests are used to investigate the fresh properties, such as the workability of concrete. In contrast, the hardened concrete properties are determined using compressive strength (CS), flexural strength (FS), and split tensile strength (STS). The experi-mental, optimization and validation of the model results show that up to 30% of the PS can be replaced in the lightweight aggregate concrete for 7 - 56 curing days in which the CS is greater than 15 MPa, STS is 7-12% of the CS, and FS is 9 - 11% of the CS. Therefore, the optimum CS for the current study ranges from 17 to 20 MPa, in which the STS is 9.39 - 10.54% of the CS, and FS ranges from 17.49% to 21.12% of the CS. The quadratic model was proposed, and the ANOVA and model fitness was produced through RSM, with the coefficient of determination (R2) above 0.99 (99%) for all three responses representing the high importance of the suggested model. Besides, the difference among the R2 and adjusted R2 was negligible, and the P-Value for CS, STS, and FS was below 0.05 (<0.0001), indicating the model's high relevance. RSM was used to improve the model, which was then verified in further lab trials.
format Article
author Ali, Mujahid
Kumar, Abhinav
Yvaz, A.
Salah, Bashir
author_facet Ali, Mujahid
Kumar, Abhinav
Yvaz, A.
Salah, Bashir
author_sort Ali, Mujahid
title Central composite design application in the optimization of the effect of pumice stone on lightweight concrete properties using RSM
title_short Central composite design application in the optimization of the effect of pumice stone on lightweight concrete properties using RSM
title_full Central composite design application in the optimization of the effect of pumice stone on lightweight concrete properties using RSM
title_fullStr Central composite design application in the optimization of the effect of pumice stone on lightweight concrete properties using RSM
title_full_unstemmed Central composite design application in the optimization of the effect of pumice stone on lightweight concrete properties using RSM
title_sort central composite design application in the optimization of the effect of pumice stone on lightweight concrete properties using rsm
publisher Elsevier
publishDate 2023
url http://eprints.um.edu.my/38453/
_version_ 1770551494163038208
score 13.211869

Similar Items