Astm c143 standard test method for slump of hydraulic. Commence the slump test as soon as possible after sampling of concrete as per standard procedure described in chapter 2. This test method was originally developed to provide a technique to monitor the consistency of unhardened concrete. The slump cone mold is lifted vertically upward and the change in height of the concrete is measured. Conclusion slump test to determine the relative water. There is no established tolerance for the slump flow of self consolidating concrete, that is measured in accordance with astm c 1611. Standard test method for the slump of hydraulic cement concrete. The test is performed to check the consistency of freshly mixed concrete in a specific batch. Concrete slump test or slump cone test is to determine the workability or consistency of concrete mix prepared at the laboratory or the construction site during the progress of the work. From a practical point of view, two geometrical quantities can be measured as the result of the test. This is a test required to pass the american concrete institute aci field technician certification program. Slump test is the most commonly used method of measuring consistency of concrete which can be employed either in laboratory or at site of work. When the slump test is carried out, following are the shape of the concrete slump that can be observed.
Consistency is a general term to indicate the degree of fluidity or the degree of mobility. The base is placed on a smooth surface and the container is filled with concrete in three layers, whose workability is to be tested. Concrete slump test is carried out from batch to batch to check the uniform quality of concrete during construction. It is not a suitable method for very wet or very dry concrete. Collect a sample of concrete to perform the slum test. How does the strength of concrete vary with a slump value. Finding the workability of concrete involves various parameters as workability depends upon stability, mobility, compactibility, placeability and finishability of concrete.
The test was repeated again, return used concrete to the mixer and remix for 30 seconds. The base is 200 mm 8in in diameter and it has a smaller opening at the top of 100 mm 4 in. This tests are carried out at site to check efficiency workability of the fresh concrete to be used in construction works and also confirmed an assurance the produced concrete within the slump range as specified in approved design mix nominal mix. Determination of workability test for concrete civil engineering animated videos, civil. Slump test is the most commonly used method of measuring workability of concrete which can be employed either in laboratory or at site of work. The slump vertical settlement measured shall be recorded in terms of millimeters of subsidence of the specimen during the test.
Measure the amount of slump in inches from the bottom of the straight edge to the top of the slumped concrete at a point over the original center of the base. Concrete slump test procedure applications, types, uses. Materials natural coarse aggregate and siliceous fine aggregate with maximum size of 38 in. Slump of concrete is measured in accordance with astm c 143. Furthermore, to construct the hybrid model, this research collected a dataset including actual concrete slump tests from a hydroelectric dam construction project in.
Astm c143143m standard test method for slump of hydraulic cement concrete. Astm c143 aci slump test of hydraulic cement concrete. The compression test measures concrete strength in the hardened state. The mold for the concrete slump test is a frustum of a cone, 300 mm 12 in of height. Here are the steps to do the slump test of concrete. As stated above slump test is essentially a measure of consistency or the wetness of the concrete mix. Concrete slump test procedure, advantages and limitations. The slump test is a means of assessing the consistency of fresh concrete. The slump test is done to make sure a concrete mix is workable. Obtain samples for strength tests by the same procedure as for slump or air test.
In a true slump concrete just subsides shortly and more or less maintain the. A small variation in slump caused by improper procedure or equipment, may cause the rejection of an entire. It is used, indirectly, as a means of checking that the correct amount of water has been added to the mix. The concrete slump test measures the consistency of fresh concrete before it sets. By this single test one judge that whether concreting has been done properly or not. Concrete slump test for workability procedure and results. Summary of concrete workability test methods the university of. Changes in the value of slump obtained during a job may indicate changes in materials, in the water content or in the proportions of the mix, so it is useful in. Typically, in a slump test, a mould of a given conical shape fig. American society for testing and materials astm standards are astm c 143 or astm. The slump plate should be clean, firm, level and nonabsorbent. Compressive strength of concrete cube test pdf, procedure, results the compressive strength of the concrete cube test provides an idea about all the characteristics of concrete.
The slump tolerances of astm c 94 are summarized in the table below. Consistency refers to the ease and homogeneity with which the concrete can be mixed, placed, compacted and finished. The slump is carried out as per procedures mentioned in astm c143 in the united states, is. Vee bee consistometer test workability of concrete test. Thoroughly mix the sample by shovelling to form a cone on the. Workability of concrete is a complex property of concrete. The concrete slump test is an empirical test that measures the workability of fresh concrete. Not equivalent to cpccco3033a slump test concrete unit descriptor this unit of competency specifies the outcomes required to slump test concrete to ensure the mix is workable and complies with the delivery docket and specified order. Concrete slump test this test is performed to check the consistency of freshly made concrete. Slump is a test to measure the plasticity wetness of concrete when it is placed. The unit includes sampling and slump testing to a set range or tolerance.
The measured slump must be within a set range, or tolerance, from the target slump. Standard test method for slump of hydrauliccement concrete. The consistency, or stiffness, indicates how much water has been used in the mix. Repeated batches of the same mix, brought to the same slump, will have the same water content and water cement ratio, weights of aggregate, cement and admixtures are uniform and aggregate grading is within acceptable limits.
For the third slump test, our group successfully got true slump with 710 mm slump. The tolerance on slump varies by slump level as ordered or specified. Begin and complete slump test within 212 minutes, maximum. The test is carried out in accordance with bs en 123502, testing fresh concrete. Roll the drum for a certain time to completely mix the concrete. Additional information on workability and quality of concrete. It also ensures that the slump loss is gradual, as evidenced by the slump loss test described below. This test plays a vital role in ensuring immediate concrete quality in a construction project. Conclusion slump test to determine the relative water content of concrete, depending on the loss in height slump of a sample obtained from a coneshaped mould. Slump test of concrete determination of workability of.
Mix is too wet or high workability mix, slump test isnt appropriate for such mix. The sampling and the test is performed under the following rules and laws. Standard slump and flow table tests objective to determine the reference slump value for kistner concrete mix design and to calibrate it against an equivalent measure using a flow table. The slump operation shall be completed in a maximum elapsed time of 2 12 minutes. This video animation, animated video explains the procedure for determination of concrete slump test. Tools standard slump cone 100 mm top diameter x 200 mm bottom diameter x 300 mm high small scoop bulletnosed rod 600 mm long x 16 mm diameter rule slump plate 500 mm x 500 mm. When a truck mixer reaches the checkpoint, the quality engineer should check the delivery note to ensure that the concrete delivered is in compliance with the concrete grade required for the concrete element to be cast. Slump test provides immediate result about the consistency and workability of concrete, that is the reason it is used widely in all over the world since 1922. The slump test the slump test is done to make sure a concrete mix is workable. A slump test is a method used to determine the consistency of concrete. Perform correlation tests several times throughout the day. The slump test indicates the behavior of a compacted concrete cone under the action of gravitational forces. The slump test is a practical means of measuring the workability. With the exception of the widely used slump test, the few methods that have been studied extensively have generally failed to gain widespread acceptance.
American society for testing and materials astm standards are astm c 143 or astm c143m. Pdf estimating concrete workability based on slump test with. It is an indication of lack of cohesion of the mix. This test can be used as a control test and gives an indication of the concrete uniformity from batch to batch. Slump test slump test is the most commonly used method of measuring consistency of concrete which can be employed either in laboratory or at site of work. If the slump test result is outside of the slump range, correct before placing th e concrete in the work. Concrete slump should not be specified for construction pros.
Even with the increase in knowledge of concrete rheology, the slump test remains the predominately used test method for measuring concrete workability. If necessary, modify sampling procedures to fit a specific situation. Mix the concrete at agitating speed for all revolutions over 150. Measure slump from the top of the mold to the displaced original center of the concrete. The concrete slump test is an onthespot test to determine the consistency as well as workability of fresh concrete. The steel slump cone is placed on a solid, impermeable, level base and. Overview of astm c143 standard test method for slump of hydrauliccement concrete. Def12the slump test results in various shapes, and according to the profile of slumped concrete, the slump are usually specified at true slump, shear slump or collapse slump. We use your linkedin profile and activity data to personalize ads and to show you more relevant ads. Concrete slump test is a simple and lowcost test which is prepared in the laboratory or at the construction site for the determination of workability and consistency. Steel slump cone kit huge thanks to make sure your. Slump cone 100 mm 4 in upper dia, 200 mm 8 in lower dia and 300 mm 12 in height tamping rod 600 mm 24 in high, 15. Under laboratory conditions, with strict control of all concrete materials, the slump is generally found to increase proportionally with the water content of a given concrete mixture, and thus to be inversely related to concrete strength.
961 906 1117 159 967 673 224 1672 1299 371 1408 610 1535 91 1638 1377 1106 640 19 1309 267 1107 610 454 420 716 1292 1174 154 73 511