Experimental Investigations on Cement Replacement by GGBS in Concrete
Journal Title: IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE) - Year 2018, Vol 15, Issue 3
Abstract
The concrete is probably the most extensively used construction material in the world with about six billion tones being produced every year. It is only next to water in terms of per-capita consumption. However, environmental sustainability is at stake both in terms of damage caused by extraction of raw material and CO2 emission during cement manufacture. This brought pressures on researchers for the reduction of cement by supplementary materials. These materials may be naturally occurring, industrial wastes or by product that are less energy intensive. These materials (called pozzoloans) when combined with calcium hydroxide, exhibits cementitious properties. Most commonly used pozzaloans are fly ash (FS), silica fume (SF), Ground granulated blast furnace slag (GGBS) and metakaolin (MK). This needs to examine the admixtures performance when blended with concrete so as to ensure a reduced life cycle cost. The present study reports the results of an experimental work, conducted to evaluate the strength characteristics study, compressive strength, flexural strength and modulus of elasticity of concrete. In durability study conventional and GGBS concrete is tested by conducting acid attack, sulphate attack and RCPT. The property of concrete made by partially replacing the cement by various % of GGBS such as 10%, 20%, 30%, 40% and 50% by volume in M30 grade of concrete. The experimental results revealed that GGBS 20% replacement concrete have 15% more compressive strength then conventional mix. The compressive strength of GGBS concrete were calculated at the curing age of 28, 56 and 90 days. thus the optimum replacement % is found to be 20% by the volume of cement.
Authors and Affiliations
P. Bhavani, Dr. B. Vidivelli
Keywords
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- EP ID EP437919
- DOI 10.9790/1684-1503026170.
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