STUDY OF ADDITIONAL COCONUT SHELL ASH
AGAINST COMPRESSIVE STRENGTH AND AIR CAVITIES ON
K-300 QUALITY CONCRETE
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Institusion
Universitas Darul ulum
Author
Cahyo Prabowo, Bowo
Subject
TA Engineering (General). Civil engineering (General)
Datestamp
2021-10-20 14:27:09
Abstract :
Concrete is one of the most important materials and most often used in the building and construction sector in Indonesia. Cement as one of the constituents of concrete can be cause damage to the environment, starting from taking raw materials, the production process to the ash pollution caused. Therefore, alternative materials are needed that can be used as a substitute for cement by utilizing waste organic, like coconut shell ash, remembering the coconut shell has the potential to cause organic waste which is still very low processing. In this study, it is expected that the number of cement in concrete can be reduced by investigating the potential coconut shell ash as a substitute for cement in percentage and its effect on the compressive strength of concrete. The research method used is the study experimental in the laboratory. In this study, 6 (six) variations in the percentage of coconut shell ash, namely 0% (control); 4%; 8%; 12%; 16%; and 20% of the initial cement weight with an amount of the test object for each percentage variation is 3. Compressive strength testing concrete is carried out when the concrete reaches the age of 7 days, 14 days and 28 day. The results of the study found that in a strong test, The normal compressive strength of 28 days old concrete is 300 kg/cm2 with a value of air cavity by 0.023%. While the value of the optimum compressive strength concrete with a mixture of coconut shell ash at the age of 28 days is as much as 4% with a compressive strength value of 319.11 kg/cm2 or an increase of 6.37% than normal concrete. While the value of the smallest air cavity is in a mixture of 8% coconut shell ash with a value of 0.011%.
Concrete is one of the most important materials and most often used in the building and construction sector in Indonesia. Cement as one of the constituents of concrete can be cause damage to the environment, starting from taking raw materials, the production process to the ash pollution caused. Therefore, alternative materials are needed that can be used as a substitute for cement by utilizing waste organic, like coconut shell ash, remembering the coconut shell has the potential to cause organic waste which is still very low processing. In this study, it is expected that the number of cement in concrete can be reduced by investigating the potential coconut shell ash as a substitute for cement in percentage and its effect on the compressive strength of concrete. The research method used is the study experimental in the laboratory. In this study, 6 (six) variations in the percentage of coconut shell ash, namely 0% (control); 4%; 8%; 12%; 16%; and 20% of the initial cement weight with an amount of the test object for each percentage variation is 3. Compressive strength testing concrete is carried out when the concrete reaches the age of 7 days, 14 days and 28 day. The results of the study found that in a strong test, The normal compressive strength of 28 days old concrete is 300 kg/cm2 with a value of air cavity by 0.023%. While the value of the optimum compressive strength concrete with a mixture of coconut shell ash at the age of 28 days is as much as 4% with a compressive strength value of 319.11 kg/cm2 or an increase of 6.37% than normal concrete. While the value of the smallest air cavity is in a mixture of 8% coconut shell ash with a value of 0.011%.
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