International Journal of Engineering and Technology

Self compacting concrete (SCC) has been developed in order to achieve durable concrete structures. Long term durability studies of self compacting concrete become necessary as it is different from normal concrete. Due to high powder content and cementitious paste in self compacting concrete it is vulnerable to chemical attack. This study aims at investigating the resistance of SCC with addition of waste plastic fibres to acid attack. The strength based mix proportion of SCC was arrived based on NANSU method of mix design for M40 grade plastic fibre reinforced self compacting concrete. It was developed by varying percentages of fibres from 0.0%, 0.25%, 0.5%, 0.75%, 1.00%, 1.1%, 1.2%, 1.3% and 1.4%. The result of fresh property tests satisfy the limit specified by EFNARC. The specimens were cured in water for 28days and then immersed in sulphuric acid solution with PH2.0. The percentage loss in compressive and split tensile strength and loss in weight of specimens for different percentages of fibers were evaluated. The addition of waste plastic fibres improved the compressive, tensile and durability characteristics. At 1.0%of plastic fibre content by weight of cement, maximum compressive and split tensile strength have been achieved. From the test results as the percentage of fibre increased, percentage weight loss and loss in compressive strength decreased when immersed in sulphuric acid with controlled PH of 2.0 for 30, 60 and 90 days.