Self levelling concrete (High performance Concrete)

Self-levelling concrete (SLC) Self-levelling concrete (SLC) is a polymer modified high -performance concrete that has very good flow ability, segregation resistance, compact and provide a levelled surface when poured over the place. An SLC does not need any separate vibration or compaction as required by normal concrete construction. The properties, construction features and benefits of self-levelling concrete are explained in the below section. Properties of Self-Levelling Concrete The self-levelling concrete has a following properties ·     Low Plastic Viscosity ·        High Flow ability ·        Less segregation ·        Less Bleeding ·        Stability The low plastic property of SLC increase the flow ability properties which imparts the self-levelling property. The balance and proportion of the above-mentioned properties in mix design helps to design the desired SLC concrete. Providing low viscosity of the concrete mix can result in stability issues. This can result in high segregation and bleeding problems. This low viscosity or high flow ability is introduced by the addition of super plasticisers or polymer agents that maintains the stability without affecting the flow ability characteristics. The viscosity agents added prevents the settling down of aggregates that causes segregation and keep the cohesiveness of the mix within the bond which in turn helps in avoiding bleeding. The major advantages of self-levelling concrete are: ·        Easy to work (good workability) ·        Less labour required ·        Levelled and smooth surface finish is obtained ·        It has good Water Resistant surface ·        Resist growth of microorganisms ·        Best choice of heavily reinforced concrete construction ·        Hardening of concrete is taking place in a homogeneous way ·        Best option where formwork is arranged in unusual geometry ·        Compressive strength higher than traditional concrete is obtained           ·        SLC gives flat and smooth concrete surface     ·        Self-levelling concrete give cohesive concrete that resits bleeding and segregation issues