Journals Proceedings

Abstract

This paper investigate the performance of lightweight oil palm shells concrete (OPS-LWC) slab with geogrid reinforcement of three OPS content to cement weight ratio of 0.45, 0.50 and 0.60. Slabs of 300mm x 300mm size with thickness of 20mm, 30mm and 40 mm were casted with different geogrid orientation and with different support boundary conditions are subjected to low impact projectile test. A self-fabricated dropweight impact test rig with a steel ball weight of 1.2 kg drop at 1 m height has been used in this research work. The main variables for the study is to find the relationship of the impact resistance against the support boundary conditions and geogrid reinforcement orientation for various OPS content.. Test results indicate that for 0.45 OPS content, the four support boundary conditions for control sample increased the impact resistance under service (first) limit crack up to 5.9 times and at ultimate limit crack up to 20.1 times against the control sample with 2 supports without geogrid. A good linear relationship has been established between first and ultimate crack resistance against the slab thickness. The orientation of the geogrid has minor significant to the crack resistance of the OPS concrete slab. OPS geogrid reinforced slab has a good crack resistance properties that can be utilized as a sustainable impact resistance construction materials.