Abstract
River sand is ruling construction industry due to its tremendous properties and composition. According to the statistics of World Industrial Silica Sand Demand, this need for sand will increase up to 123.4 millions of metric tons in 2025 in the United States and about 51 millions of metric tons in Asian countries. The increasing population has escalated the demand, in-parallel asking for an alternative material development from research community. The earlier study yielded a promising results on Polylactic acid as a replacement for river sand in steps of 0, 10, 30 and 50% inclusion in holding concrete matrix. Currently, the work focuses on reducing the degradation aspect of Polylactic acid, when it comes in contact with cement and aggregate. The work comprising of coating a Poly lactic acid with epoxy for better durability. Soil burial test was conducted from 0 to 50 days and weight of samples recorded. Further, the samples were subjected to Scanning Electron Microscopy study to check the water entrapment or air void filling by water droplets. After epoxy coating coupons were built to check any strength deterioration but results were quite convincing under simulation package ANSYS workbench along with experimental investigation. Compressive strength reduced by 43% in comparison to pristine PLA sample with previous work. As per Polylactic acid grade, a monomer and then polymer was built under the J-OCTA platform to extract the material properties, the same data were used in ANSYS Workbench for simulation. The results reveal that a good correlation with experimental and simulation for compressive strength of 21.7 MPa for the control mix of M30(based on previous work). In case of degradation study, the day-wise extracted reports reveal quite interesting facts, and with positive note, probably PLA in future can be considered as the most preferred material for replacement of river sand.
Published Version
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