Formula of Moulding Sand, Bentonite and Portland Cement to Improve The Quality of Al-Si Cast Alloy

Authors

• Andoko Andoko, Department of Mechanical Engineering, Faculty of Engineering, Universitas Negeri MalangFollow
• Poppy Puspitasari, Department of Mechanical Engineering, Faculty of Engineering, Universitas Negeri MalangFollow
• Avita Ayu Permanasari, Department of Mechanical Engineering, Faculty of Engineering, Universitas Negeri MalangFollow
• Didin Zakaria Lubis, Department of Mechanical Engineering, Faculty of Engineering, Universitas Negeri MalangFollow

Abstract

A binder is any material used to strengthen the bonding of moulding sand grains. The primary function of the binder is to hold the moulding sand and other materialstogether to produce high-quality casts. In this study, there were four binder compositions being tested, i.e. 5% bentonite + 5% Portland cement, 4% bentonite + 6% Portland cement, 6% bentonite + 4% Portland cement, and 7% bentonite + 3% Portland cement. Each specimen was measured for its compressive strength, shear strength, tensile strength and permeability. The highest compressive strength was obtained fromthe specimen composed of 6% bentonite+ 4% Portland cement. The highest shear strength was obtained from the moulding sand with 7% bentonite+ 3%Portland cement. The highest tensile strength was obtained fromthe specimen contained 5% bentonite+ 5% Portland cement. The specimen composed of 5% bentonite + 5% Portland cement had the lowest permeability of 131 ml/min, while that of 6% bentonite + 4% Portland cement had the highest permeability of 176 ml/min.

Publisher

Universitas Negeri Malang

First Page

49

Last Page

52

Recommended Citation

Andoko, Andoko; Puspitasari, Poppy; Permanasari, Avita Ayu; and Lubis, Didin Zakaria (2017) "Formula of Moulding Sand, Bentonite and Portland Cement to Improve The Quality of Al-Si Cast Alloy," Journal of Mechanical Engineering Science and Technology (JMEST): Vol. 1: No. 2, Article 1.
DOI: 10.17977/um016v1i22017p049
Available at: https://citeus.um.ac.id/jmest/vol1/iss2/1