In general, the numerical value of concrete slump is used to find the workability, which indicates the proportion of water to cement but various factors such as materials\u2019 properties, mix methods, usage amount, additives, and others affect concrete slump. To understand better the nature of a concrete slump test and the way it should be done, follow another article from Pars Zagros<\/strong>.<\/span><\/p>\n Fresh concrete which is cast in the project field soon, should have special standards as a part of the building project before use. The concrete slump test measures the consistency of a concrete volume to observe how the concrete easily flows in the mold and between rebars.<\/span><\/p>\n This test not only determines consistency between different classes of concrete but also detects faults existing in the mixture and enables the operator to modify it before casting the mixture in the field. By measuring the general concrete slump, you can recognize if the portion of water to cement is too large or not and if the mixture has high workability or not!<\/span><\/p>\n The main reason to conduct concrete slump tests is to make sure about the quality and strength of similar concrete classes. The more water is added to the mixture, the weaker the concrete will become. If the project needs greater workability and more consistent concrete (as a result of a greater slump), we should increase the cement content to ensure that the concrete can still provide the desired compressive strength. This test is only one of the ways of making sure about the concrete quality.<\/span><\/p>\n Workability is a crucial property of concrete and is related to compression and strength. Desirable workability is not the same for all kinds of concrete. Therefore, we can not set a specific standard for all the work related to concrete pouring.<\/span><\/p>\n Some definitions of workability are given below:<\/span><\/p>\n Tools required to conduct slump test are as follows:<\/span><\/p>\n Note: <\/strong>The above operation should be conducted in a place free from vibration or impact and within 2 minutes after sampling.<\/span><\/p>\n An increase in slump means that the moisture content of aggregates has increased unexpectedly or the lack of fine aggregate (sand) has changed. Too high or too low slumps indicate inappropriate workability of concrete and alert the mixer operator to find a solution for the problem.<\/span><\/p>\n The measured slump (vertical drop) should record the drop of the specimen in mm during the test. Investigating the concrete slump shape is as described below<\/span>:<\/p>\n<\/li>\n<\/ul>\n To achieve a suitable result, some precautions should be considered during the test:<\/span><\/p>\n If a shear or collapse drop occurs, the test should be repeated. We can conclude from the only true slump and categorize the result in a range according to the slump value:<\/span><\/p>\n Although there are different types of categorizations for concrete, the main rule is that a low slump value indicates lower workability and a high slump value indicates high workability.<\/span><\/p>\n According to Issue 55 of general technical specifications for building works, suitable slump for concrete elements and blocks is based on the following table:<\/span><\/p>\n Various international regulations have specific standards for concrete slump tests. These standards can specify methods and equipment for determining the consistency of fresh concrete using slump. Strict adherence to these standards during slump tests is essential for acceptance and reliability.<\/span><\/p>\n The standards of this test are as follows:<\/span><\/p>\n In workshop report, following items should be declared in concrete slump test:<\/span><\/p>\n The concrete slump test presents the consistency and flow of the fresh concrete mixture. For each building project, it is important to test slump value. This topic is also effective on ultimate compressive strength of concrete and other factors such as crack rate, durability, etc.<\/span><\/p>\n <\/p>\n <\/p>\n","protected":false},"excerpt":{"rendered":" Concrete Slump Test The concrete slump test is conducted to determine the workability or consistency of the concrete mixture provided in the laboratory or in the field. In other words, a concrete slump test is conducted to investigate the uniform quality during the construction of the structure. The slump should be called the simplest concrete […]<\/p>\n","protected":false},"author":2,"featured_media":8698,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[227,290],"tags":[525,511,510,249,512],"yoast_head":"\nWhat is the slump test?<\/h2>\n
The importance of using concrete slump test<\/h2>\n
What is concrete workability?<\/h2>\n
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The advantages of concrete slump test<\/h2>\n
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The limitations of concrete slump test<\/h2>\n
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Factors effective on concrete slump test<\/h2>\n
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![\"Concrete](\"https:\/\/betonparszagros.ir\/wp-content\/uploads\/2021\/08\/concrete-slump-test-equipments-betonparszagros.jpg\")
<\/p>\nThe required equipment for conducting concrete slump test<\/h2>\n
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![\"\u0646\u062d\u0648\u0647](\"https:\/\/betonparszagros.ir\/wp-content\/uploads\/2021\/08\/concrete-slump-test.jpg\")
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Concrete slump test methodology<\/strong><\/h2>\n
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The results of the concrete slump test<\/h2>\n
![\"\u0627\u0646\u0648\u0627\u0639](\"https:\/\/betonparszagros.ir\/wp-content\/uploads\/2021\/08\/concrete-slump-types.jpg\")
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The required precautions during the concrete slump test<\/h2>\n
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Measuring workability using concrete slump test<\/h2>\n
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Iran\u2019s code standards for concrete slump test<\/h2>\n
International standards for concrete slump test<\/h2>\n
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Which items should be declared in the concrete slump test report?<\/h2>\n
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Conclusion<\/h2>\n