1. Investigation on mechanical properties of low calcium fly ash and slag based geopolymer concrete
Authors : Tummala Srinivas
Pages : 223-234
DOI : http://dx.doi.org/10.21172/1.73.031
Keywords : Geopolymer Concrete, Oven Curing, Compressive, Tensile and Flexural Strength Abstract :Geopolymer is emerging as future cement as it not only meets the critical properties of cement but also falls under category of sustainability. An objective of this paper is aimed to investigate the compressive, tensile and flexural strength of low calcium fly ash (Class-F) and slag based geopolymer concrete for G50 which is equivalent to M50 grade of concrete. The alkaline solution used for the present study is combination of sodium silicate (Na2Sio3) and sodium hydroxide (NaOH in the range of 12 to 18 molarity). The ratio of Na2SiO3 to NaOH is 2.5 and SiO2 to Na2O is 2.09 has been used since the compressive strength is maximum at these ratios. The test specimens were cast and after one day rest period, half of the specimens were cured in an oven at 60°C for 24hours and the remaining period cured in sun light until the testing is done and remaining half of the specimens were ambient cured. The specimens were tested on 3rd, 7th and 28th day according to codal procedures. The comparative study is done among oven curing, ambient curing and contol mix for compressive, tensile and flexural strength of concrete. From the test results it is observed that the compressive strength of G50 grade of geopolymer concrete was slightly increased compared to control mix of M50 grade and there is a slightly lower result in case of split tensile strength but there is no much variation in flexural strength.
Citing this Journal Article :Tummala Srinivas, "Investigation on mechanical properties of low calcium fly ash and slag based geopolymer concrete ", Summer Special Issue - - June 2016, 223-234
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