STUDI PENAMBAHAN BENTONIT PADA PASIR CETAK BASAH TERHADAP PERMEABILITAS DAN KEKUATAN TEKAN

Tegar, Gemilang and H, Budi and S, Herman (2012) STUDI PENAMBAHAN BENTONIT PADA PASIR CETAK BASAH TERHADAP PERMEABILITAS DAN KEKUATAN TEKAN. UNSPECIFIED thesis, UNSPECIFIED.

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Abstract

The purpose of the study is to know the influence of addition variation of bentonite content mixture in the amount of 0 gr, 30 gr, 50 gr and 70 gr of wet mold sand can produce difference of gas flow potential (permeability) and compressive strength with sand mixture materials (80% river sand and 20% silica sand). The study is also to know variation of the addition bentonite content from each the study sample that are produce optimum permeability and compressive strength. The samples in this study use SNI 15-0312-1989 which have a diameter of 50 mm and height 50 mm. Data is obtained by measuring rate of permeability by using Permeability Tester, meanwhile value of compressive strength is measured by using Universal Strength Machine. Other factors that are likely affecting results of measurement are controlled. The study use experiment method. The results of the study indicated that there was difference between variety of bentonite addition of wet mold sand toward gas flow potential (permeability) and compressive strength. Optimum mixture the addition of bentonite of wet mold sand from each sample of the experiment was: 50 gr the addition of bentonite produces permeability 104,67 cm 3 /menit and compressive strength 61,87 KN/m 2 . Keyword: bentonite mixture, permeability, and compressive strength

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