Study of fly ash waste styrofoam concrete under tropical environment

Lee , Yee Loon and Koh , Heng Boon and Ahmad, Mohd Hilton and Md Noor, Nurazuwa and Mat Seman, Ahmad Shakri (2011) Study of fly ash waste styrofoam concrete under tropical environment. Project Report. Universiti Tun Hussein Onn Malaysia. (Unpublished)

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Abstract

Geopolymer concrete (Geocrete, GPC) is a recently developed material to address the global issue of climate change. GPC does not require Portland cement as binder. Instead fly ash, sodium silicate and sodium hydroxide are used. This study focused on Grade 35 concrete mix design with workability of 500 rnm in slump flow. The effects of glass fiber, biomass aggregate and heated expanded polystyrene (EPS) were determined in GPC mixtures. GPC specimens were cast into cubes and prisms. There were 36 prisms of GPC as control and 36 prisms were added glass fiber for flexural strength test at 7 days, 14 days and 28 days. 108 cubes of size 100 mm were cast to determine compressive strength at 7 days, 14 days, 28 days and 56 days. There were 54 cubes of size lOOmm for water penetrati6n test and sulphuric acid test conducted at 7days, 14 days and 28 days. GPC was exposed to ambient temperature of around 33OC and heat cured at 60°C for 24 hours. Experimental results showed that the workability of GPC achieved 250 mm slump and flow diameter of 530 mrn. Compressive strength and flexural strength of GPC were 75.8 MPa and 6.01 MPa respectively. Water penetration of GPC achieved 7.3 mm at the age of 28 days. Weight loss and compressive strength change of GPC in 10 % concentration sulphuric acid tests were 2.34 % and 46.3 8 MPa reductions at the age of 28 days. These results showed that GPC has high compressive and flexural strengths, low water penetration and better sulphuric acid resistance compared to conventional concrete. This study is to be extended to cover other aspects related to strength, durability and dimensional stability under sustained load in order to increase the body of knowledge of geopolymer concrete for sustainable construction.

Item Type:Monograph (Project Report)
Subjects:T Technology > TP Chemical technology
ID Code:1786
Deposited By:Normajihan Abd. Rahman
Deposited On:04 Oct 2011 15:05
Last Modified:04 Oct 2011 15:05

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