DURABILITY STUDY ON SELF COMPACTING CONCRETE
Abstract
Self Compacting Concrete is generally defined as the "Concrete, which does not need
Compaction." It means SCC gets compacted without external efforts like vibration, tamping etc. The mixture therefore is required to have the ability of flowing, filling voids and being stable. Due to these characteristics, SCC is ideally suited for concreting structures, which have heavily congested reinforcement or difficult access conditions. The use of SCC in actual construction is still less in India. Lack of awareness,
Technical data could be cited as the main reasons. Considerable research is carried out in India towards the technology development so that SCC could soon find a place in the Indian Construction Industry. The ingredients used for SCC are 53 grade ordinary Portland cement, river sand, coarse aggregate, super plasticizer, class-F fly ash from thermal power plant, viscosity modifying agent. Cement is replaced by fly
ash at 10%, 20%, 30% and 40% levels by weight of cement.In the present experimental investigation the main concentration is focused on durability properties of self compacting concrete mixes. The number of trail mixtures are used and tests such as Slump Flow, V-Funnel, L-box etc. Then investigations are carried out for Percentage loss in compressive strength, Percentage loss of weights, Durability factors for the
specimens immersed in H2So4, HC1 and Na2So4 Solutions for 28 days and Permeability aspect. The super plasticizer mix ratios are 1%, 1.5%, 2% and 2.5% like that VMA also mix at 1%, 1.5%, 2% and 2.5%. For each mix 9 numbers of cube and 18 numbers of cylinder are cast. The cube used to find the compressive strength and the cylinder used to find compressive strength and tensile strength. Chemical attack by strength deterioration factor test Acid resistance test, Alkaline resistance test, Sulphate resistance test to Comparative study on conventional with self-compacting concrete..
Author
P.Mayilsamy
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