Rodded Unit Weight of Coarse Aggregates PURPOSE Determination of the unit weight of coarse aggregates in a compacted condition. This test method is applicable to aggregates not exceeding 15 cm in nominal size. The unit
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There is no generally accepted method of directly measuring the amount of work necessary to achieve full compaction, which is a definition of workability. Probably the best test yet available uses the inverse approach: the
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Flow Table Test This test was covered by BS 1881 : 105 : 1984. The test is appropriate for concrete of high and very high workability, including flowing concrete which would exhibit a collapse slump.
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Most standards have laid down the acceptance criteria of quality concrete. In all the cases, the 28-days compressive strength shall alone be the criterion for acceptance or rejection of the concrete. 7 days compressive strength of
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In this article, the Compaction Factor Test is discussed which is used to calculate the compaction factor, and to know more about workability. Compaction Factor Test Objective: To calculate the compaction factor, and to know more
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In this article, the Rebound Test (schmidt hammer test) is outlined. The Swiss engineer Ernst Schmidt, first developed a practicable rebound test hammer in the late 1940s, amd modern versions are based on this. Figure 1 shows the
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In this article “Non-Destructive Testing of Concrete” brief description is given for methods used to assess concrete strength and durability without damage. Non destructive test is a method of testing existing concrete structures to assess
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One of the important properties of concrete is “tensile strength” as structural loads make concrete vulnerable to tensile cracking. Tensile strength of concrete is much lower than its compressive strength (that’s why steel is used
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