Effects of Foundry Sand Powder (Green Sand Molding Waste (GSW)) from Engine Parts Casting Upon Mechanical Properties of Concrete

Abstract

A group of foundry sand powder, green sand and molding waste (here-in-after referred to as GSW)was main by-products from engine parts casting process in which their status were transformed by heatingto high temperature close to 1400 °c in the formation process. It has potential to be utilized to partiallyreplace fine aggregate. Therefore, the objective of this research was to study the chemical compositionsand physical properties of foundry sand. The studied properties of fresh concrete were unit weight, waterrequirement, slump loss, and setting time. Also, mechanical properties such as compressive strength andsplitting tensile strength were investigated. The contents of ordinary Portland cement Type I (300, 350, and400 kg/m3), initial slumps of concrete (5 ± 0.5, 10 ± 0.5, and 15 ± 0.5 centimeters), and percentagereplacements (0, 5, 10, and 15% by weight) of the GSW foundry sand in fine aggregate (river sand) werevaried.

From test results, it was found that the increase of GSW proportions from 0 (normal concrete) to 5,10, and 15% by weight respectively, increased unit weight, water requirement of concrete at the specifiedslump, slump loss, and setting time. Whereas, the compressive and splitting tensile strengths of theconcrete decreased. Furthermore, it was found that the GSW foundry sand can be used to replace the riversand up to 15% by weight, depending on the specified compressive strength of concrete.