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Strengthening Geopolymer with Selective Sizes of Concrete Block Waste


Paper Type 
Contributed Paper
Title 
Strengthening Geopolymer with Selective Sizes of Concrete Block Waste
Author 
Parinya Somrang, Anucha Wannagon, Pattarawan Choeycharoen, and Watcharee Sornlar
Email 
parinyas@mtec.or.th
Abstract:

In this research, the properties of geopolymer materials containing aggregate from recycled concrete masonry blocks were studied. Metakaolin and waste lignite bottom ash were selected as the geopolymer raw materials. The effects of concrete block waste particle size on the mechanical properties of geopolymer materials were investigated. Concrete block waste from a construction site was crushed and classified into three different size groups smaller than 5 mm, 2 mm, and 1 mm. The Na2SiO3/NaOH ratio was fixed at 3:2 with the NaOH concentration at 10M. The compressive strength, density, porosity, and water absorption were determined. The results showed that geopolymer materials containing recycled aggregate with potential applications could be made. The compressive strength of metakaolin-based geopolymer using concrete block waste aggregates with a particle size smaller than 2 mm on the 28th day was between 39.79-44.75 MPa. SEM analysis results indicated the particle size of the concrete block waste influences the strength development of geopolymer. In which, the aggregates with a particle size smaller than 2 mm can reinforce geopolymer under certain conditions.

Start & End Page 
1657 - 1678
Received Date 
2021-06-29
Revised Date 
2021-09-02
Accepted Date 
2021-09-09
Full Text 
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Correspondence & Author Name 
Keyword 
geopolymer, metakaolin, bottom ash, concrete block waste, compressive strength
Volume 
Vol.48 No.6 (November 2021)
DOI 
View:337 Download:105

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Chiang Mai Journal of Science

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