Impact strength and workabilty behaviour of glass fibre self compacting concrete

Cement based materials are quasi-brittle and are known to exhibit a highly stress-rate sensitive behaviour. In structures that are subjected to impact forces, this causes concern in two ways: first the brittleness may result in catastopic failure without warning and second, the properties of concrete during such events may be very different from those measured in standardized quasistatic tests. Unfortunately, there are no standardised tests available for testing concrete under impact loading and there is significant confusion as to what constitutes an appropriate test.

Concrete is a mostly used construction material in the world. As the use of concrete becomes more widespread the specifications of concrete like Durability, Quality, Compactness and Optimization of concrete becomes more important. Self Compacting Concrete (SCC) is a very fluid concrete and a homogeneous mixture that solves most of the problems related to ordinary concrete. Besides, SCC gets compacted under its own weight and there is no need for an internal vibrator for the body of the mould. This specification helps the execution of construction components under high compression of reinforcement.

This paper presents an experimental investigation on the properties like workability, Compressive Strength and Impact strength of Glass Fibre Reinforced Self compaction concrete (GFSCC). The elimination of vibration for compacting concrete during placing through the use of Self compacting concrete leads to substantial advantages related to better Homogeneity, Enhancement of working environment and improvement in the productivity by increasing the speed of construction The resulting concrete is characterized in the fresh state by methods used for Self compacted concrete, such as slump-flow, V-funnel and L-box tests respectively.

This paper concentrates mainly on studying the properties like workability, Compressive Strength and Impact strength of GFSCC using Alkali-Resistant Glass Fibres in various proportions and comparing the same with the properties for SCC mixes of grade M 30 and M 65.