Abstract
Pervious concrete or non-fine concrete is a simple form of lightweight concrete made by eliminating the use of fine aggregates. As a result of not using fine aggregate in pervious concrete, then created a cavity filled with air and water can be passed. This cavity resulted in reduced density of the concrete as well as the reduced amount of area that needs to be covered by cement paste, thereby reducing the compressive strength. To increase the compressive strength of pervious concrete, in this study will utilize waste material. The waste material is the cocnut shell ash and coconut shell to strengthen the coarse aggregate bonds, so it is expected to increase the compressive strength along with the increase in permeability. Thus, in this study will replace part of the coarse aggregate with coconut shell with percentage 0%, 2,5%, 5%, 7,5%, 10% and partially replace cement with coconut shell ash with percentage 0%, 2,5%, 5%, 7,5%
Highlights
Non-fine concrete can be called permeaconcrete or pervious concrete, such as concrete formed from mixture of cement, coarse aggregate, water with added material or admixture
Based on the results of the analysis in the previous chapter obtained the results of the analysis as follows: 1. Increased compressive strength of pervious concrete by partial replacement of cement with coconut shell ash only occurs in 0% coconut shell mixture with ash percentage from 0% to 2.5% ie from 4.94 MPa to 7.85 MPa
The compressive strength decreases in the percentage of shell ash over 2.5% ie the compressive strength is below 7.85 MPa
Summary
Non-fine concrete can be called permeaconcrete or pervious concrete, such as concrete formed from mixture of cement, coarse aggregate, water with added material or admixture. Weakness of pervious concrete is it’s compressive strength tend to low be low This is due to the cavities in the pervious concrete so it has permeability capability by eliminating the use of fine aggregates on concrete mixtures. Sometimes it was found difficult to obtain material for the manufacture of concrete To overcome this problem, this research will be done by using waste that is coconut shell as a partial replacement material of coarse aggregate and coconut shell ash as partial replacement material of cement for mixed material of pervious concrete. The coconut shell is capable of increasing the conventional concrete compressive strength to a maximum of 5% percentage of coarse aggregate material replacement [1]
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