CHAPTER 2 - SAND TESTING

Abstract

Publisher Summary The terminology sand testing is used by foundrymen, generally meaning testing of mould and core materials as prepared in the sand plants, but also involving the assessment of certain physical characteristics of, for example, incoming silica or naturally bonded sands such as grain size. There is a continuing effort to devise testing methods in an attempt to understand the behavior of mould and core materials at room and elevated temperatures. This chapter explains the testing procedures of the more commonly used properties, such as green and dry compressive strength, shatter index, green and dry permeability, clay content, and sieve distribution. Certain high temperature properties, such as hot compressive and retained strengths, are not generally measured on a routine basis and apparatus used by different foundries may vary. The testing procedures described in the chapter are designed for both routine control and research purposes and are in accordance with the specifications laid down by the American Foundrymen's Society (AFS).