. Bulletin of the U.S. Department of Agriculture. Agriculture; Agriculture. SAMPLING AND TESTING HIGHWAY MATERIALS. 67 In making the slump test in the laboratory or in the field it is recommended that the form be filled immediately after mixing and withdrawn three minutes after mixing has been completed. When central mixing plants are used slump tests shall be made at the plant and at the end of the haul. At the plant the sample of concrete shall be taken after the h 4". PLAN Fig. 35.—Cone for concrete slump test. entire batch has been discharged from the mixer. At the end of the haul the
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. Bulletin of the U.S. Department of Agriculture. Agriculture; Agriculture. SAMPLING AND TESTING HIGHWAY MATERIALS. 67 In making the slump test in the laboratory or in the field it is recommended that the form be filled immediately after mixing and withdrawn three minutes after mixing has been completed. When central mixing plants are used slump tests shall be made at the plant and at the end of the haul. At the plant the sample of concrete shall be taken after the h 4". PLAN Fig. 35.—Cone for concrete slump test. entire batch has been discharged from the mixer. At the end of the haul the