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Full-Text Articles in Civil and Environmental Engineering
Oil Palm Shell As A Lightweight Aggregate For Production High Strength Lightweight Concrete, Hilmi Mahmud
Oil Palm Shell As A Lightweight Aggregate For Production High Strength Lightweight Concrete, Hilmi Mahmud
Hilmi Mahmud
In Malaysia, oil palm shell (OPS) is an agricultural solid waste originating from the palm oil industry. In this investigation old OPS was used for production of high strength lightweight concrete (HSLC). The density, air content, workability, cube compressive strength and water absorption were measured. The effect of five types of curing conditions on 28-day compressive strength was studied. The test results showed that by incorporating limestone powder and without it, it is possible to produce the OPS concretes with 28-day compressive strength of about 43-48 MPa and dry density of about 1870-1990 kg/m3. The compressive strength of OPS HSLC …
Development Of High Performance Concrete Using Silica Fume At Relatively High Water-Binder Ratios, Hilmi Mahmud
Development Of High Performance Concrete Using Silica Fume At Relatively High Water-Binder Ratios, Hilmi Mahmud
Hilmi Mahmud
The aim of this study was to investigate the possibility of developing high performance concrete (HPC) using silica fume (SF) at relatively high water-binder ratios. For this purpose, water-binder ratios of 0.45 and 0.50 were considered. Test specimens were air and water cured and exposed to a medium temperature range of 20 °C to 50 °C. The compressive strength, modulus of elasticity and initial surface absorption (ISA) of hardened concrete were determined in the laboratory. Test results indicated that concrete under water curing offers the best results. The highest level of compressive strength and modulus of elasticity and the lowest …