BITS Faculty Publications
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Item An Experimental Investigation of Accelerated Carbonation on Properties of Concrete(ENGINEERING JOURNAL, 2016) Bhunia, Dipendu; Singh, Shamsher BahadurThis study deals with the effect of carbonation on the mechanical properties such as compressive strength, flexural strength and durability like depth of carbonation and volume of permeable voids of the concrete cast using ordinary Portland cement over a time period of up to 120 days. To study the behavior of carbonation front of concrete in presence of varying water content, water binder ratios of 0.35, 0.50 and 0.65 are chosen. It is observed that the volume of permeable voids of concrete has decreased, with an increase in compressive strength, flexural strength and depth of carbonation as the number of days of exposure of concrete specimen to high carbon dioxide increased.Item Role of water/cement ratio on strength development of cement mortar(Elsiever, 2015-12) Singh, Shamsher BahadurThe effect of water/cement (w/c) ratio on the mechanical properties such as compressive strength and split tensile strength of cement mortar cylinders and cubes was investigated experimentally for 28 days curing period as per IS standard. Based upon the experimental results, empirical equations have been developed to predict the strength of cement mortar mixes with various w/c ratios. It is observed that Abrams’ law is applicable for the cement mortar also. The cement mortar contains varying proportions of portland pozzolana cement (PPC) and river sand such as 1:3, 1:4, 1:5, 1:6, 1:7, 1:8 with different w/c ratios. An empirical equation has been developed between split tensile strength and compressive strength of cement mortar. Results show that compressive strength and split tensile strength of cement mortar decreased with an increase in the w/c ratio. It is observed that minimum w/c ratio required to make the cement mortar workable is 0.5.Item An Experimental Investigation of Accelerated Carbonation on Properties of Concrete(Eng. Journal, 2016) Singh, Shamsher Bahadur; Bhunia, DipenduThis study deals with the effect of carbonation on the mechanical properties such as compressive strength, flexural strength and durability like depth of carbonation and volume of permeable voids of the concrete cast using ordinary Portland cement over a time period of up to 120 days. To study the behavior of carbonation front of concrete in presence of varying water content, water binder ratios of 0.35, 0.50 and 0.65 are chosen. It is observed that the volume of permeable voids of concrete has decreased, with an increase in compressive strength, flexural strength and depth of carbonation as the number of days of exposure of concrete specimen to high carbon dioxide increased.