Title : FLEXURAL BEHAVIOUR OF GEOPOLYMER CONCRETE
Authors : V. Bhikshma1, T. Naveenkumar2, M. Balamohana Krishna3
Publication : 23 - 26 October 2013
Volume :
Pages :
Price : 250
Abstract : In the construction projects, concrete is one of the most widely used construction material and facing lot of problems due to lack of proper available and sustainable materials. Cement is the material which can be produced with large volumes of CO2 emission and leading to high heat ofhydration resulted in to temperature cracks and reduced strain energy in to concrete structures. In view of the above geo-polymer concrete (No cement concrete) is the need of the hour to solve the problems of concrete and to protect the sustainable green concrete. In geo-polymer concrete no cement is used, instead fly ash and alkaline solutions such as sodium hydroxide (NaOH) and sodium silicate (Na2O, SiO2) and potassium hydroxide (KOH) are used to make the binder necessary to manufacture the concrete. In the present experimental investigation, five different trial mix proportions of alkaline liquid to fly ash ratios(0.30, 0.35, 0.40, 0.45 and 0.50) were designed and noted the properties of the fresh concrete results highly viscous and good in workable with compaction factor of 0.95. The trial mix specimens were tested for compressive strength at the age of 28 days. The test results gave a compressive strength ranging from 25 MPa to 35 MPa. Considering these values, 10 RC beams of size1500 mm x150 mm x 230 mm were cast and tested for each alkaline to chemical ratio with ambient temperature curing. The range of moment carrying capacity of the RC beams tested obtained is 27 kNm to 47 kNm and the results are encouraging for the future construction works.