Mix design of self-compacting concrete ? A new approach

摘要

This paper deals with the Mix design of Self-Compacting concrete. The highlight of this paper is, simplest process of Mix design according to Indian Standard Code of Mix design (IS-10262) and It follows all the design conditions in line with Indian Standard Code of Reinforced Concrete Structure (IS:456). Generally, in construction industry (Pre-cast & Ready-mix Industry) there are mainly two methods of mix design are used. 1) Okamura-Ozawa proposed method (1986) & 2) Nan-Su method (2001). These two methods are tedious, and it required expertise in the Field of mix design. Another important guideline is EFNARC (2002, Revised 2005) is used widely. This is an extended part of Brite-EU ram Project. But EFNARC does not provide how to do SCC Mix design step by step. In India no specific Mix design process is available or adopted, based on climatic condition of country and in consideration with standard structural code provisions. Proposed mix design is as per Indian standard code and the output of research is matching with the EFNARC guidelines & Okamura-Ozawa proposal. To determine Flowability Slump Flow Test, For Viscosity T500 test, for passing ability L-Box test for determining the segregation resistance, sieve segregation test was conducted. Density of Fresh concrete test was performed. To measure the strength of concrete Compressive strength, Flexure strength & Split tensile test was performed. UPV test, Water absorption test performed to analysis the concrete pore structure. Pull Off test performed to obtain the bond strength of concrete constituents. SEM test performed to determine the concrete morphology. After performing all the tests on fresh properties, it can be concluded that this process of mix design as per IS: 10262 along with EFNARC guidelines is suitable for SCC Mix design and can be adopted further in construction industry with modification and requirement as per grade of concrete to be designed.