Journal of Ceramics and Concrete Technology. ISSN: 2457-0826 (Online)

Authors: Vijaylaxmi .B.V, Sneha. P , Ashwini. S, Sachin.H,  S.Gangangoudar

Abstract: Japan in the 1980’s was the first country who developed the idea of Self Compacting Concrete (SCC).  The use of Self Compacting Concrete (SCC) in the precast concrete is very common in many European nations and the USA. The use of Self Compacting Concrete(SCC) in the ready-mixed concrete business,  is restricted to certain limits and also limited to specific projects despite all the advantages it offers. One of the principal causes, why Self Compacting Concrete (SCC) is not used in the ready mixed business, is its high cost associated with such mixes. By mixing an innovative Viscosity Modifying Agent (VMA) with a Superplasticizer, the production of Smart dynamic concrete(SDC) is has been made possible.

In this study mix design method for obtaining SCC and SDC is based on absolute volume concept starting with a volume of paste was adopted. The method involves very few trails for obtaining SCC and SDC. Nine SCC and SDC mixes were developed using cement contents of 375 kg/m3 and 450 kg/m3 with the fixed water content of 190liters/m3 for all the trails for dif erent paste contents of 0.39, 0.41 and 0.43 and 230 kg/m3 and 280 kg/m3 with the fixed water content of 165 litres/m3 for all the trials for dif erent paste contents of 0.30, 0.32 and 0.34 respectively. The powder content varied from 545kg/m3 to 662kg/m3 for SCC and 361 kg/m3 to 460 kg/m3 for SDC. Water to powder ratio by mass ranged from 0.28 to 0.34 for SCC and 0.36 to 0.45 for SDC. Cubes of 150 mm were cast and tested at 1day, 7days and 28days. Based on the study it is very clear that the compressive strength and split tensile strength of SCC and SDC increases with the volume of paste for the same water and cement ratio. The compressive strength versus the water cement ratio follows Abrams hypothesis and use of filler materials not only makes the mix cohesive but also increases the long term strength. The modified method of mixing with the polycarboxylic ether based super plasticiser can be advantageously used for enhancing the flowability of mix.