Behaviour of paver blocks by replacement of fine aggregate with m-sand and crumb rubber waste

Paver blocks have been extensively used as a problem solving technique for providing pavement in areas where conventional type of construction are less durable due to many operational and environmental constraints. Rubber production is increased world wide and generally 1.3 billion tons of waste tyres generated every year. The volume is expected to increase upto 2.2 billion tons by 2025. It is not possible to discharge these huge tons of rubber in environment because they decompose very slowly and cause environmental pollution. So, it is necessary to have a relevant use of this waste. Also digging of river sand leads to the extinct of river. So, the availability of river sand is reduced and the cost of the river sand is high. Hence, Manufactured sand (M sand) which has same properties compared to natural sand is used as fine aggregate in concrete. In this study, an investigation was carried out to identify the behaviour of paver blocks by replacement of fine aggregate with rubber waste & M-sand and partial replacement of cement with dolomite. The grade of concrete used was M35. The replacement percentage of rubber waste was 3%, 6%, 9%, 12% and 15% of fine aggregate and the remaining percentages were replaced by M-sand. The replacement percentage of dolomite was 30 % of cement. Physical properties such as Compressive strength, split tensile strength & flexural strength were determined for 7 days, 14 days & 28 days and the results were discussed.