COMPRESSIVE STRENGTH AND MODULUS OF
ELASTICITY OF GEOPOLYMER CONCRETE WITH
METAKAOLIN AND SILICA FUME
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Institusion
Universitas Atma Jaya Yogyakarta
Author
HANDYANINGTYAS, GARUDEA MARTHA
Subject
Structure
Datestamp
2015-08-03 11:08:49
Abstract :
Geopolymer concrete is concrete which uses different materials and are environmental friendly during the production process. There are several advantages of geopolymer concrete; such as anti-fire, used as a cover material for the exterior of mechanical equipment, durable and environment friendly. Geopolymer also produced by the chemical reaction of alumina-silicate oxides (Si2O5, Al2O2) with alkali Poly-silicate yielding polymeric Si?O?Al bonds. Geopolymer concrete is concrete without cement as a bond but, geopolymer concrete uses alkali activator as a bond of the concrete. This research studies about compressive strength and modulus of elasticity of geopolymer concrete with metakaolin and silica fume as solid materials. The proportions of solid material are 25%, 50% and 75% for the metakaolin, while the proportion of silica fume is 5%. The alkali activators in this research are NaOH and Na2SiO3. The proportions of NaOH and Na2SiO3is are 2:1. The aggregates in this research are coarse aggregate (split) and fine aggregate (sand) with the proportion of 2:1. The samples in this research are 18 samples. 9 samples cylinder with the size are 70mm x 140mm and the other 9 samples cylinder with the size are 150mm x 300mm. Compressive strength test is done at the age of 14 days and 28 days. The compressive strength test is using Universal Testing Machine (UTM). Based on the compression strength test that has been done, the value of the average compressive strength at 28 days with comparative precursor (metakaolin:silica fume) 25:5, 50:5, 75:5 are 1.149 MPa, 0.641 MPa and 0.178 MPa, respectively. Based on modulus of elasticity test that has been done, the value of the average modulus of elasticity at 28 days with comparative precursor (metakaolin:silica fume) 25:5, 50:5, 75:5 are 2.866 MPa, 2.371 MPa and 1.143 MPa, respectively.
Geopolymer concrete is concrete which uses different materials and are environmental friendly during the production process. There are several advantages of geopolymer concrete; such as anti-fire, used as a cover material for the exterior of mechanical equipment, durable and environment friendly. Geopolymer also produced by the chemical reaction of alumina-silicate oxides (Si2O5, Al2O2) with alkali Poly-silicate yielding polymeric Si?O?Al bonds. Geopolymer concrete is concrete without cement as a bond but, geopolymer concrete uses alkali activator as a bond of the concrete. This research studies about compressive strength and modulus of elasticity of geopolymer concrete with metakaolin and silica fume as solid materials. The proportions of solid material are 25%, 50% and 75% for the metakaolin, while the proportion of silica fume is 5%. The alkali activators in this research are NaOH and Na2SiO3. The proportions of NaOH and Na2SiO3is are 2:1. The aggregates in this research are coarse aggregate (split) and fine aggregate (sand) with the proportion of 2:1. The samples in this research are 18 samples. 9 samples cylinder with the size are 70mm x 140mm and the other 9 samples cylinder with the size are 150mm x 300mm. Compressive strength test is done at the age of 14 days and 28 days. The compressive strength test is using Universal Testing Machine (UTM). Based on the compression strength test that has been done, the value of the average compressive strength at 28 days with comparative precursor (metakaolin:silica fume) 25:5, 50:5, 75:5 are 1.149 MPa, 0.641 MPa and 0.178 MPa, respectively. Based on modulus of elasticity test that has been done, the value of the average modulus of elasticity at 28 days with comparative precursor (metakaolin:silica fume) 25:5, 50:5, 75:5 are 2.866 MPa, 2.371 MPa and 1.143 MPa, respectively.
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