Proctor Test

Proctor Test - P roctor Test (AST M D1557-91) The Proctor,...

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Proctor Test (ASTM D1557-91) The Proctor, or Modified Proctor Test, determines the maximum density of a soil needed for a specific job site. The test first determines the maximum density achievable for the materials and uses this figure as a reference. Secondly, it tests the effects of moisture on soil density. The soil reference value is expressed as a percentage of density. These values are determined before any compaction takes place to develop the compaction specifications. Modified Proctor values are higher because they take into account higher densities needed foe certain typed of construction projects. Test methods are similar for both tests. Proctor Test A small soil sample is taken from the jobsite. A standard weight is dropped several times on the soil. The material weighed and then oven dried for 12 hours in order to evaluate water content Modified Proctor Test This is similar to the Proctor Test except a hammer is used to compact material for greater impact, The test is normally preferred in testing materials for higher
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Proctor Test - P roctor Test (AST M D1557-91) The Proctor,...

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