Durability of coconut shell powder (CSP) concrete

[摘要] The rising cost of construction in developing countries like Malaysia has led concrete experts to explore alternative materials such as coconut shells which are renewable and possess high potential to be used as construction material. Coconut shell powder in varying percentages of1%, 3% and 5% was used as filler material in concrete grade 30 and evaluated after a curing period of 7 days and 28days respectively. Compressive strength, water absorption and carbonation tests were conducted to evaluate the strength and durability of CSP concrete in comparison with normal concrete. The test results revealed that 1%, 3% and 5% of CSP concrete achieved a compressive strength of 47.65 MPa, 45.6 MPa and 40.55% respectively. The rate of water absorption of CSP concrete was recorded as 3.21%, 2.47%, and 2.73% for 1%, 3% and 5% of CSP concrete respectively. Although CSP contained a carbon composition of 47%, the carbonation test showed that CSP no signs of carbon were detected inside the concrete. To conclude, CSP offers great prospects as it demonstrated relatively high durability as a construction material.

[发布机构] Jamilus Research Centre, Faculty of Environmental and Civil Engineering, Parit Raja, Johor, Batu Pahat; 86400, Malaysia^1;Research Center for Soft Soil, Universiti Tun Hussein Onn Malaysia, Batu Pahat; 86400, Malaysia^2

[效力级别] 土木建筑工程

[关键词] Alternative materials;Coconut shell powders;Concrete grades;Curing periods;Filler materials;High durability;High potential;Normal concretes