STUDY ON STRENGTH AND DURABILITY PROPERTIES OF STEEL FIBRE REINFORCED SELF COMPACTING CONCRETE

Abstract

The present project investigates the durability studies on Steel Fiber Reinforced Self Compacting Concrete (SFRSCC), with different grades low strength standard grade and high grade concrete i.e., M20, M30, M40 and M60. In addition to compressive strength durability performance of Steel Fiber Reinforced Self Compacting Concrete (SFRSCC) mixes were determined by means of Chemical Resistance, Initial Surface Absorption Test (ISAT). In the present study, coarse aggregate with nominal size 10 mm was used. Viscosity Modifying Admixtures (VMA) is used to increase the suspension of power of aggregates and also to eliminate possible segregation. Fine powdered materials likefly ash is also used for eliminating the possible segregation. Super plasticizer is usedto enhance flow of mix. In the present study, the rational mix design procedure for self-compacting concrete is used. SCC mixes contains large quantity of powder (material whose parcelsize is 0.125 mm)to maintain the plastic yield of the properties of fresh concrete as per the general guidelines for design of SCC mixes given in the EFNARC (2005).The present project consists of two phases. In the first phase, SCC mixes for different grades are developed without steel fibers and with steel fibers. The mechanical properties like compressive strength of the different grades were studied. In the second phase, based on the experimental results, durability properties were studied with the using of specimens of size 100 mm × 100 mm × 100 mm. Durability studies like Acid attack factors, Acid-Durability factors, Sulphate attack factors, Sorptivity are studied for the Plain SCC and steel Fiber Reinforced SCC and a comparison is made. Detailed studies have revealed that the Steel Fiber Reinforced Self Compacting Concrete made with the Steel fibers displays a better performance. The investigations and results are presented in different chapters.