Chiang Mai Journal of Science

Physical and Mechanical Properties of Diatomite/Metakaolin-based Geopolymer for Construction Materials

Paper Type	Contributed Paper
Title	Physical and Mechanical Properties of Diatomite/Metakaolin-based Geopolymer for Construction Materials
Author	Suwanan Thammarong, Narumon Lertcumfu, Pharatree Jaita, Nuttaporn Pimpha, Tawee Tunkasiri, Gobwute Rujijanagul and Pruchya Malasri
Email	malasri0425@gmail.com
Abstract: In this study, the geopolymer materials were prepared by geopolymerization process, using calcined diatomite (from Lampang province) and metakaolin (from Ranong province) with alkali activators (NaOH and Na2SiO3 solutions). The fresh slurry was casted in a plastic mold with cubic shape and cured at room temperature. Effects of calcination temperature of diatomite were investigated. Material characterizations, including XRD, XRF, and SEM, were used in this work. The maximum density of the geopolymer samples was 1.43 g/cm3, observed for the sample containing diatomite which calcined at 700 °C. To determine the mechanical property (compressive strength), the geopolymers were tested after the curing process (for 28 days). The result suggested that the compressive strength of the samples can be linked with the porosity of the samples, where the sample contained diatomite which calcined at 700 °C had the highest compressive strength of 18.90 MPa.
Start & End Page	786 - 795
Received Date	2019-07-03
Revised Date	2020-05-11
Accepted Date	2020-05-18
Full Text	Download
Keyword	calcined diatomite, metakaolin, geopolymer composite, compressive strength
Volume	Vol.47 No.4 (Special Issue II : July 2020)
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