For cube test two types of specimens either cubes of 15cm x 15cm x 15cm or 10cm x 10cm x 10cm depending upon the size of aggregate are used. The slump test indicates the behavior of a compacted concrete cone under the action of gravitational forces. The test is carried out in accordance with bs en 123502, testing fresh concrete. 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. Slump test doesnt give accurate results for the low workability of concrete when the slump is for concrete definition a slump test is a method used to determine the consistency of concrete. Site testing slump test always do your slump test before making your cubes to ensure the concrete is usable. Compaction factor test of concrete for low workability.
Commence the slump test as soon as possible after sampling of concrete as per standard procedure described in chapter 2. Fill cone full by volume and rod 25 times with 58inchdi ameter x 24inch long hemispherical tip steel tamping rod. The cone was then filled with wet concrete in three layers. Prepare a leveled surface and place the flow table on the surface. Mix the concrete at agitating speed for all revolutions over 150. In order to promote public education and public safety, equal justice for all, a better informed citizenry, the rule of law, world trade and world peace, this legal document is hereby made available on a noncommercial basis, as it is the right of all humans to. It is used to check the workability of freshly made. Oct 30, 2016 the slump test is a means of assessing the consistency of fresh concrete. After this, you fill it to the 34 point and tamp it again. Place the mould on a smooth horizontal non porous base plate. Procedures for slump test step by step the whole concrete slump test is performed under the 5 steps. So it is our responsibility to ensure that the concrete is in good quality. Fresh behavior of concrete was assessed by conducting slump test.
Each layer was tempered 25 times with a standard 16mm. 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. In particular a the slump flow provides a test for concrete mix of very high workability b the chloride penetration test provides a test for measuring the durability of concrete against chloride attack c the ambt provides a test for measuring the asr of aggregates used for our concrete mix. It is therefore important that the consistency of the mix is such that the concrete can be transported, placed and finished sufficiently easily and without segregation. 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. Concrete slump test procedure applications, types, uses and.
It is used to check the workability of freshly made concrete for the easy placement of concrete. The concrete slump test is an onthespot test to determine the consistency as well as workability of fresh concrete. Nd t 23 making and curing concrete test specimens in the field. This test indicates the watercement ratio and the properties of materials and also admixture etc. This test method was originally developed to provide a technique to monitor the consistency of unhardened concrete. The consistency, or stiffness, indicates how much water has been used in the mix. Fill the mould with the prepared concrete mix in 4 approximately equal layers. Gilson offers a solid selection of slump testing equipment meeting astm c143, aashto t 119, and bs 1881 standards for testing in the lab or field. Mar 24, 2020 slump test shouldnt be carried if the aggregate used in concrete is above 40mm. Stand firmly on the footpieces and fill the volume of the cone with the sample. The test is an empirical test that measures the workability of fresh concrete.
The concrete slump test is used for the measurement of a property of fresh concrete. Thoroughly mix the sample by shovelling to form a cone on the. With a workable concrete mix, slump test and making concrete cubes was also done. The water content was adjusted to compensate for the dry gravel and sand used in the lab. In a shear slump the top portion of the concrete shears off and slips sideways. Since 1922 slump test has been widely used to check out the concrete workability at the site. The two major types are structural concrete and pavement concrete see table 2, on page 6. The test is carried out in accordance with bs en 123502.
Jun 10, 2015 slump test of concrete to measure workability slump cone test of fresh concrete object. Empty the sample from the container onto the sampling try. Clean the internal surface of the mould and apply oil. Filled to the top with one last layer, the mixture gets a. In a true slump the concrete simply subsides, keeping more or less to shape. The aashto standard test procedure reports the percentage of material finer. The slump plate should be clean, firm, level and nonabsorbent. This is a test required to pass the american concrete institute aci. The division of the scale on the rod bf concrete cone in centimetres and volume vibration of the cone in pot. It also ensures that the slump loss is gradual, as evidenced by the slump loss test described below.
Overview of astm c143 standard test method for slump of hydrauliccement concrete. It is used, indirectly, as a means of checking that the correct amount of water has been added to the mix. Introduction the concrete slump test is used for the measurement of a property of fresh concrete. The measured slump must be within a set range, or tolerance, from the target slump. The slump operation shall be completed in a maximum elapsed time of 2 12 minutes. 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.
Consistency refers to the ease and homogeneity with which the concrete can be mixed, placed, compacted and finished. It can be employed either in laboratory or at site of work. Each batch and mix was evaluated to obtain the workability by slump test as shown in fig. Concrete slump test for workability procedure and results. More specifically, it measures concrete consistency between batches. Compressive strength of concrete cube test, procedure. Concrete slump test procedure, advantages and limitations. A sample is poured into a mini slump cone, rodded, struck off, and lifted at 2 minutes. Fill cone full by volume and rod 25 times with 58inchdi ameter x 24inchlong hemispherical tip steel tamping rod.
Slump plate 500 mm x 500 mm procedure of slump test for concrete. For most of the works cubical moulds of size 15cm x 15cm x 15cm are commonly used. In the united kingdom, the standards specify a slump cone height of 300 mm, a bottom diameter of 200 mm and a top diameter of 100 mm. Concrete slump test equipment, slump cone, base, rod. Standard slump cone 100 mm top diameter x 200 mm bottom diameter x 300 mm high 2. It requires less apparatus when compared with the other tests. The base is 200 mm 8in in diameter and it has a smaller opening at the top of 100 mm 4 in. Astm c143 aci slump test of hydraulic cement concrete. The mini slump test is performed for the analysis of flow behavior of cement to check the workability, according to standard astm. Pdf the minislump test is a fast, inexpensive and widely adopted method for. Compressive strength of concrete cube test, procedure, results. Concrete slump test equipment, slump cone, base, rod gilson co.
Collect a sample of concrete to perform the slum test. Standard test method for the slump of hydraulic cement concrete. Slump test procedure can be performed in laboratory as well as construction site. Astm c143 standard test method for slump of hydraulic. Test procedure the original mini slump cone test procedure uses a 600 gram sample.
Slump test when making the slump test, the base of the slump cone was put on a flat surface. Slump test is the most commonly used method of measuring consistency of concrete which can be employed. The slump test is perhaps the most widely used because of the simplicity of the apparatus required and the test procedure. The cube specimens were tested to obtain compressive strength and cylinder specimens were evaluated for obtaining splitting tensile strength, as well as to establish the stressstrain relationship of concrete. Choose from individual products or required components contained in our convenient slump test sets.
After the material is introduced into the water, the mixing speed in increased from 1,200 rpm to 15,000 rpm for 1 minute. Pdf reproducible minislump test procedure for measuring the. If this test is being carried out in the field, the sample mixed concrete shall be obtained. Slump test procedure field testing gates concrete forming.
Acceptance test ing includes tests on plastic concrete for slump, air content, density unit weight, temperature, and tests on hardened concrete for strength and other durability properties as required in contract documents or project specifications. The program for sampling and testing plastic portland cement concrete varies with the type of concrete application. Pdf estimating concrete workability based on slump test with. This test is performed to measure consistency or workability of fresh concrete, where the nominal maximum size of aggregate does not exceed 38 mm using slump test apparatus. Determination of workability test for concrete civil engineering animated videos, civil. Vee bee testdefinition and procedure workability of. Measure slump from the top of the mold to the displaced original center of the concrete. Mar, 2019 the wc ratio, amount and type of aggregate and cement, admixtures, and weather conditions are main factors that affect the workability of concrete.
Flow table test to measure the flow value of concrete flow table test to measure the flow value of concrete. The compacting factor test is performed to find out the workability of concrete. 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. The slump flow provides a test for concrete mix of very high workability b the chloride penetration test provides a test. The scope of this field test is to ensure the concretes workability and consistency before casting it. The stiffness of the concrete mix should be matched to the requirements for the finished product quality.
The graduated rod 7 is fixed on to the swivel arm and at the end of the graduated arm 8. The test is popular due to the simplicity of apparatus used and simple procedure. In order to promote public education and public safety, equal justice for all, a better informed citizenry, the rule of law, world trade and world peace, this legal document is hereby made available on a noncommercial basis, as it is the right of all humans to know and speak the laws that govern them. Concrete quality control test at site slump test youtube. Mar 09, 2017 2 the concrete slump test is used to determine of concrete s workability, or fluidity. Also indirectly to determine of concrete consistency or stiffness. Tests on concrete concrete slump test, compression test for. In a collapse slump the concrete collapses completely. Concrete slump test is carried out from batch to batch to check the uniform quality of concrete during construction. The test is performed to check the consistency of freshly mixed concrete in a specific batch. In the freshly prepared cement paste, small particles interact via colloidal forces, such as vander waals, electrostatic repulsion, steric hindrance, and hydrogen bonding, and some bigger particles interact via direct contact like friction or collisions. The concrete slump test is known as standard test method for slump of hydrauliccement concrete and carries the code astm c 143 or aashto t 119.
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. And more importantly, the stepbystep procedure of slump test followed by the list of cautions during the test and way to measure the workability from the test result. The aashto standard test procedure reports the percentage. 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.
Flow table test to measure the flow value of concrete. The slump test is a means of assessing the consistency of fresh concrete. Perform in 510 seconds with no lateral or torsional motion. Nd t 121 density unit weight, yield, and air content gravimetric of concrete. Slump test is the most commonly used test of measuring workability of concrete. It is used conveniently as a control test and gives an indication of the uniformity of concrete from batch to batch. Consistency is a general term to indicate the degree of fluidity or the degree of mobility.
The mold for the concrete slump test is a frustum of a cone, 300 mm 12 in of height. The purpose of this test is to avoid using the lowquality concrete mix for casting. The slump test is a practical means of measuring the workability. The flow table test procedure does not conform with astm standard and is as follows. Obtain samples for strength tests by the same procedure as for slump or air test, except obtain the sample from the middle half of the load whenever possible. Slump test always do your slump test before making your cubes to ensure the concrete is usable.
Place the slump cone in the sheet metal pot of the consistometer and fill it with fresh concrete as described in the slump test. Tests on concrete concrete slump test, compression test. Use a damp cloth to clean the top of the table and the inner surface of the mould. A small variation in slump caused by improper procedure or equipment, may cause the rejection of an entire. Estimating concrete workability based on slump test with least squares support vector regression. Concrete slump test or slump cone test is to determine the workability or. This test is not suitable for very dry and high stiff concrete. Standard test method for slump of hydrauliccement concrete. Begin and complete slump test within 212 minutes, maximum. Concrete slump test procedure applications, types, uses. Concrete is placed into a cylindrical steel mold with an inner diameter of 36 mm.
Concrete slump test measures consistency and workability of fresh concrete, and indirectly, the watercement ratio of the concrete mix. To test slump, you fill the slump cone to 14 of its height and tamp down with 25 strokes of a 34inch steel rod. Acceptance testing includes tests on plastic concrete for slump, air content, density unit weight, temperature, and tests on hardened concrete for strength and other durability properties as required in contract documents or project specifications. Slump test measures the consistency or workability of concrete. May 15, 2018 this video animation, animated video explains the procedure for determination of concrete slump test. Sep 16, 2014 here are the steps to do the slump test of concrete. If the slump test fails to meet the range limit as dictated by the british standard shown in the table below then the load should be rejected. In the case of concrete containing aggregate of maximum size more than 38 mm, the concrete shall. The concrete slump test is an empirical test that measures the workability of fresh concrete. The slump test the slump test is done to make sure a concrete mix is workable. Then you fill the cone to the halfway point and tamp it with another 25 strokes.
If a shear or collapse slump is achieved, a fresh sample should be taken and the test is. Slump test shouldnt be carried if the aggregate used in concrete is above 40mm. Concrete slump test experiment procedure civilology. Procedure for workability test of concrete vee bee test these are the various steps involved in vee bee test procedure.
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