The Chalk Crushing Value is determined by using the chalk impact crushingtest, which measures the rate at which a sample of chalk lumps crushes under impactsfrom a freefalling rammer. The chalk crushing value can be used, together with thesaturation moisture content of the intact chalk lumps, to classify chalk in relationto its behaviour as a freshly placed fill material. The test procedure is describedfor a single sample of chalk lumps, but normal procedure should be to calculate themean value derived from six such tests on representative samples.
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<element name="ChalkCrushingValueTest" type="diggs:ChalkCrushingValueTestProcedureType" abstract="false" substitutionGroup="diggs:AbstractLaboratoryTestProcedure"><annotation><documentation>The Chalk Crushing Value is determined by using the chalk impact crushing test, which measures the rate at which a sample of chalk lumps crushes under impacts from a freefalling rammer. The chalk crushing value can be used, together with the saturation moisture content of the intact chalk lumps, to classify chalk in relation to its behaviour as a freshly placed fill material. The test procedure is described for a single sample of chalk lumps, but normal procedure should be to calculate the mean value derived from six such tests on representative samples.</documentation></annotation></element>