Bulk utilization of flyash in self compacting concrete

• Published in: KSCE journal of civil engineering Vol. 19; no. 7; pp. 2116 - 2120
• Main Authors: Venkatakrishnaiah, R., Sakthivel, G.
• Format: Journal Article
• Language: English
• Published: Seoul Korean Society of Civil Engineers 01-11-2015; Springer Nature B.V; 대한토목학회
• Subjects: Admixtures; Blast furnace slags; Carbon dioxide; Carbonation; Cement; Chloride ions; Chloride resistance; Civil Engineering; Compressive strength; Concrete; Concrete mixes; Concrete properties; Engineering; Fly ash; Geotechnical Engineering & Applied Earth Sciences; GGBS; Granulation; Greenhouse gases; Ground stations; Industrial Pollution Prevention; Manufacturing; Materials; Penetration resistance; Portland cement; Portland cements; Power plants; Raw materials; Self-compacting concrete; Silica; Silica fume; Slag; Structural Engineering; Thermal energy; Thermal power; Thermal power plants; Water absorption; 토목공학; silica fume; durability and saturated water absorption; high volume fly ash concrete; Ground Granulated Blast furnace Slag (GGBS)
• ISSN: 1226-7988; 1976-3808
• DOI: 10.1007/s12205-015-0706-4

Manufacturing of Portland cement is a resource exhausting, energy intensive process that releases large amounts of the green house gas CO2 into the atmosphere. Production of 1 ton of Portland cement requires about 2.8 tons of raw materials, including fuel and other materials. As a result of de-carbonation of lime, manufacturing of 1 ton of cement generates about 1 ton of green house gas. This paper presents the initial efforts for development of self-compacting concrete mixes employing high volume of fly ash additionally admixed with other mineral admixtures such as Ground Granulated Blast furnace Slag (GGBS) and Silica Fume. The use of fine material such as fly ash, GGBS or silica fume etc. can ensure the required concrete properties. Here three sets of mixes are prepared and their properties are studied in their fresh state. In the first set of mixes 50% of cement content of designated M40 mix are replaced by fly ash (from Ennore thermal power station, Chennai). The second sets of mixes are prepared by admixing 20% of GGBS and 50% of fly ash as replacement of cement. The third set of mixes are prepared by admixing 50% fly ash, 20% GGBS and 5% of silica fume. The total content of the cementitious materials has been fixed at 600 Kg/m3 in all the mixes. The result of tests for the cube compressive strength, the saturated water absorption and resistance to chloride ion penetration indicate very good performance of all the three SCC mixes.