Effect of metakaolin content and shape design on strength performance of lightweight rubberized geopolymer mortars incorporated slag-waste glass powders
Lightweight rubberized geopolymer (LRGP) has gained attention due to its economic, engineering, and envi ronmental benefits. With the rising human demands, the need for alternative materials to meet the requirements of infrastructural expansion, and global industrialization required. Based on thos...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | en |
| Published: |
Elsevier
2024
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| Subjects: | |
| Online Access: | http://eprints.uthm.edu.my/12347/1/J17763_5d0179f69ed82d8429a67c58db70f3f7.pdf http://eprints.uthm.edu.my/12347/ https://doi.org/10.1016/j.conbuildmat.2024.136500 |
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| Summary: | Lightweight rubberized geopolymer (LRGP) has gained attention due to its economic, engineering, and envi
ronmental benefits. With the rising human demands, the need for alternative materials to meet the requirements
of infrastructural expansion, and global industrialization required. Based on those facts, this study aimed to
develop of lightweight geopolymer mortars using wastes rubber as fine aggregate (WRA) to replace the natural
aggregates, which metakaolin (MK), wastes bottle glass (WBG) and granulated blast furnace slag (GBFS) used as
precursor materials with alkaline activator contained low molarity of sodium hydroxide solution and sodium silicate and cured at ambient temperatures. The effect of WRA on physical, mechanical, and microstructural properties of metakaolin-based rubberized geopolymer has been evaluated by using several tests such as compressive, flexural and tensile strength. As well as morphology and chemical reaction on LRGP by using AFM, FESEM, EDX, FTIR and XRD tests. In addition, a sustainable shape design has been cast and subjected to compressive strength to obtain the strength performance of the proposed LRGP mortar. At optimal mixture, the SEM images exhibited improvement in the interfacial transition zone (ITZ) among WRA and binder, leading rubberized geopolymer with 15% WRA to achieve a strength of 27.47 MPa after 28 days and with a reduction in
density by 7.2%. The findings of this study can provide valuable insights on utilizing WRA in the shape design
and formulation of geopolymer mortar, a key ingredient in the development of functional environmentally friendly building materials. |
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