Optimizing napthalene based superplasticizer content for optimum rheology and strength of self compacting concrete containing fly ash and MIRHA

摘要

Concrete properties in fresh state take critical role of successful pouring and good hardened state. In this point of view, the self compacting concrete simply called SCC was initiated. The aim of producing of such was that it should be honey-like viscous material that contain low amount of water and high range water reducers to modify the viscosity of concrete. The principal aim of this research study was to develop the optimum mix design of SCC by addressing the issues highlighted in a number of research papers. Investigation of the rheology of the fresh concrete was made in order to satisfy the criteria of self compactibility. This research has been prepared to extend the knowledge of self compacting concrete (SCC) when it mixed with fly ash and/or Microwave Incinerated Rice Husk Ash (MIRHA) as filler and also the role of these ashes as pozzolanic material in hydration process. Self compacting concrete itself is well-known with its high workability, flowability, segregation resistance and homogeneity. Determination of accepted SCC mix design or ingredient proportion is very crucial and become the central of this study by reason of reliability of particular mixed whether it can be applied into the formwork without any vibration or not. Whereas this test so-called rheological properties test is fundamental to get the optimum mix design together with the result of mechanical properties test. The result showed very promising outcomes that fly ash and MIRHA were proven have ability to enhance to strength and sustain both monotonic and cyclic loading better than normal concrete.