A study on high performance concrete using sandstone aggregates
An investigation into the potential use of crushed sandstone aggregates in high performance concrete (HPC) has been carried out. A suitable mix design of HPC has been developed using crushed sandstone coarse and fine aggregates. The engineering properties of both fresh and hardened HPC have been ob...
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| Format: | Thesis |
| Language: | English English |
| Published: |
2006
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| Subjects: | |
| Online Access: | https://eprints.ums.edu.my/id/eprint/344/1/24%20PAGES.pdf https://eprints.ums.edu.my/id/eprint/344/2/FULLTEXT.pdf |
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| Summary: | An investigation into the potential use of crushed sandstone
aggregates in high performance concrete (HPC) has been carried out. A suitable mix design of HPC has been developed using crushed sandstone coarse and fine aggregates. The engineering properties of both fresh and hardened HPC have been obtained by conducting tests on slump, air content, fresh concrete density, compressive strength, flexural strength and modulus of elastiCity. The long-term compressive strength performance of HPC has been studied. The flexural behaviour such as ultimate load capacity, deflection and crack width at service load, deflection and curvature ductility, and position of neutral axis have been determined on prototype reinforced HPC beams at two points load. The durability performance of hardened concrete has been conducted by doing the sorptivity, absorption and permeable pore voids, rapid chloride penetration test, chloride diffusion by 90-day salt ponding and, wet and dry cycle. In this investigation three types of curing conditions have been employed to see the effect of curing on strength and durability. The most satisfactory performance in engineering properties on HPC is observed in full water curing. Combination of silica fume and fly ash
as partial replacement of cement with crushed sandstone aggregates found to synergistic effects on workability, strength and durability on HPC. This investigation concludes that locally available sandstone aggregates can be used in HPC production. In future, the prospect for resource utilization of marginal quality sandstone aggregates in HPC can be explored further. |
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