Slump test theory pdf

Correlating slump, slump flow, vebe and flow tests to. Standard test method for the slump of hydraulic cement concrete. It is used, indirectly, as a means of checking that the correct amount of water has been added to the mix. It determines the time required for transforming, by vibration, a concrete specimen in the. Concrete slump test is carried out from batch to batch to check the uniform quality of. This tests results can be interpreted in multiple ways. Dimensions 200 x 100 x 300mm h steel tamping rod, dia 16 x 600mm l slump metal base plate 450 x 450mm. 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. The slump test the slump test is done to make sure a concrete mix is workable. The consistency, or stiffness, indicates how much water has been used in the mix. Slump adjustment is a fact of life for concrete contractors, but they should follow these guidelines for its use variations in slump between trucks can be the result of many factors. The slump test is really a variant of the slr and the lasegues tests.

To determine workability of concrete by slump test. It can be employed either in laboratory or at site of work. The compaction factor test is carried out to measure the degree of workability of fresh concrete with regard to the internal energy required for compacting the concrete thoroughly. It is used conveniently as a control test and gives an indication of the. The technique depicted below is adapted from mark dutton. Lower slump concrete is very stiff, and higher slump concrete is more fluid. Pdf correlating slump, slump flow, vebe and flow tests. Slump test is performed in the sheet metal cylindrical pot of the consistometer. The slump test is a practical means of measuring the workability. The mold for the test is in the form of the frustum of a cone having height 30 cm, bottom diameter 20 cm and top diameter 10 cm.

Slump test equipment reliance laboratory equipment. Slump is a test for the rigidity of uncured concrete. Introduction tensile testing is one of the simplest and most widely used mechanical tests. The concrete slump test measures the consistency of fresh concrete before it sets. What is the importance of slump test in concrete work answers. With the exception of the widely used slump test, the few methods that have been studied extensively have generally failed to gain widespread acceptance. Initially the sheet metal slump cone is placed inside the cylinder container that is placed in the consistometer. The american standards explicitly state that the slump cone should have a. The test is essential for a fuller recognition of the factors contributing to some patients disorders. Slump test is the most commonly used test of measuring workability of concrete. Changes in the value of slump obtained during a job may indicate changes in materials, in the water content or in the. Slump cone, scale for measurement, temping rod steel.

Additional information on workability and quality of concrete. Concrete slump test for workability procedure and results. 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. Oct 29, 2015 different test methods for workability measurement depending upon the water cement ratio in the concrete mix, the workability may be determined by the following three methods. A little extra effort to observe good practice is the key to ensure that the concrete properties are properly evaluated. Add water, if necessary, in accordance with astm c 94. Concrete slump test is a measurement of concretes workability, or fluidity.

The purpose of this study was to identify the normative sensory responses to the slump test in asymptomatic subjects. Slump test compaction factor test veebee consistometer test 1. It is used conveniently as a control test and gives an indication of the uniformity of concrete from batch to batch. The compacting factor test is performed to find out the workability of concrete. Slump flow test is an alternative test for highly workable mixes and has been incorporated in japanese standard. When the mortars and concretes for which the final slump was less than 100 mm are excluded, the measured slump times range from 0. Its an indirect measurement of concrete consistency or stiffness.

For instance, the slump test only provides one point on the flow curve, namely, the yield stress. Each concrete layer is one fourth the height of the cone. The sensitivity and specificity of the slump and straight leg raised tests in patients with lumbar disc herniation. Slump is measured from the highest point according to indian standard code of practice.

Slump test doesnt give accurate results for the low workability of concrete when the slump is test used for concrete mixes of very low workability. Objective the compacting factor test is designed primarily for use in the laboratory but it can also be used in the field. Concrete slump test experiment procedure civilology. Patient is seated upright with hands held together behind hisher back. It is one of the physical parameters of concrete which affects the finesse, strength and durability. Fresh concrete when unsupported will flow to the sides and sinking in the. The ease with which one can use concrete is called workability. The slump test is described differently among sources. The common factor among sources is the reproduction of pain as tension is applied to the dura during testing. Slump and kelly ball testing would be performed to investigate workability of mixture. Slump test doesnt give accurate results for the low workability of concrete when the slump is slump and slump flow values are plotted in fig. They also provide a ball bearing effect, making the concrete easier to finish, and produce better cement hydration. The slump test is a neurodynamic test used to assess neurological symptoms such as sciatica, tingling, numbness or burning sensation in the lower limb possibly caused by a hernia or nerve root.

The theory part gives brief theoretical background of the experiment while the experimental part outlines the procedure for performing the test. The apparatus used for doing slump test are slump cone and tamping rod. Summary of concrete workability test methods the university of. To perform the test, you need a slump cone and a tamping rod.

Compaction factor test workability test of fresh concrete. The slump test result is a measure of the behavior of a compacted inverted cone of concrete under the action of gravity. The slump is carried out as per procedures mentioned in astm c143 in the united states, is. However you define it, though, the bottom line remains the same. The slump test is used as a fast, lowcost diagnostic tool in the evaluation of leg and back pain disorders. Pdf reproducible minislump test procedure for measuring the. 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 tamping rod is of steel 16 mm diameter and 60cm long and rounded at one end.

It is performed to check the workability of freshly made concrete, and therefore the ease with which concrete flows. Most people in the business agree that a typical slump for ordinary decorative concrete applications would be in the 4 to 5inch range, but theres. Materials natural coarse aggregate and siliceous fine aggregate with maximum size of 38 in. Used to determine the consistency of concrete mixes having medium and high workability. 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.

It can also be used as an indicator of an improperly mixed batch. Object the purpose of this experiment is to understand the uniaxial tensile testing and provide knowledge of the application of the tensile test machine. 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. Testing slump in your concrete mix and why it is important. Slump test is used to determine the workability of fresh concrete. The procedure for conducting the veebee test are as follows. The sensitivity and specificity of the slump and the straight leg raising tests in patients with lumbar disc herniation. The modified slump test as described was performed on all of the mixtures and the partial slump times which will hereafter be called the slump times are given in the tables in appendix ivvi. To assess whether a herniated disc, neural tension, or altered neurodynamics are contributing to the patients symptoms. The measured slump must be within a set range, or tolerance, from the target slump.

The discussion in this manual is divided into three parts viz. The slump and slump flow values are plotted in fig. 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 is the most commonly used method of measuring workability of concrete which can be employed either in laboratory or at site of work. It is not a suitable method for very wet or very dry concrete. Long delivery, waiting, and unloading times, for example, can decrease slump. It determines the time required for transforming, by vibration, a concrete specimen in the shape of a. Procedure to determine workability of fresh concrete by slump test. Test for workability of concrete slump cone youtube. 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.

Compaction factor test of concrete for low workability. Jun 10, 2015 slump test of concrete to measure workability slump cone test of fresh concrete object. Examination and treatment the slump test is becoming more widely accepted as an examination and treatment procedure for all levels of the vertebral column. Determination of workability of fresh concrete by slump test aim. The slump test is perhaps the most widely used because of the simplicity of the apparatus required and the test procedure. Mar 09, 2017 the slump test is perhaps the most widely used because of the simplicity of the apparatus required and the test procedure. The slump plate should be clean, firm, level and nonabsorbent. The test is popular due to the simplicity of apparatus used and simple procedure. In the united states, engineers use the astm standards and aashto specifications when referring to the concrete slump test. Veebee test to determine concrete workability using. The slump test is a means of assessing the consistency of fresh concrete. The slump test is referred to in several testing and building codes, with minor differences in the details of performing the test.

Pdf the minislump test is a fast, inexpensive and widely adopted method for. Tests on concrete concrete slump test, compression test for. 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. The model used to predict the yield stress from the conical slump test was devised by murata.

Title objective theory apparatus procedure result discussion reference. Pdf the sensitivity and specificity of the slump and the. The slump test is a neural tension test used to detect altered neurodynamics or neural tissue sensitivity. Attempt has therefore been made to correlate slump, slump flow, slump flow time, percent flow and vebe time to rheological parameters of highperformance concrete. It measures the consistency or the wetness of concrete which then gives an idea about the workability condition of concrete mix. The concrete slump test is an onthespot test to determine the consistency as well as workability of fresh concrete. 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. Lab 1 concrete proportioning, mixing, and testing supplemental lab manual prepared by mutlu ozer objectives concepts background experimental procedure report requirements discussion objectives students make concrete according to the mix design. Compaction factor test of concrete for low workability concrete. While laboratory rheometers provide comprehensive data, present field methods are severely limited because most of time they give only a value related to either yield stress or plastic viscosity.

Eightyfour subjects were tested using a standardized procedure by the same examiner to ensure consistency. The scope of this field test is to ensure the concretes workability and consistency before casting it. 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. Slump test suitability this method is suitable only for the concrete of high workability.

Slump adjustment is a fact of life for concrete contractors. Stand firmly on the footpieces and fill the volume of the cone with the sample. By reducing the amount of water required, cement amounts can be reduced because concrete strength is directly related to the watercement ratio. The slump test indicates the behavior of a compacted concrete cone under the action of gravitational forces. The purpose of this test is to avoid using the lowquality concrete mix for casting. A slump test is a method used to determine the consistency of concrete. 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 controlling the quality of the concrete produced gambhir. The glass disc attached to the swivel arm is moved and placed just on the top. Slump tests the slump test is performed on newly mixed concrete. The examiner instructs to the patient to flex hisher spine slump, followed by neck flexion. Collect a sample of concrete to perform the slum test. The relationship is of the expected form, with little variation of slump flow for slumps up to about 180 mm, the approximate limit of true slump, and considerable change in slump flow for slumps in excess of 200 mm, i.

This test method is used to determine the slump of plastic hydraulic cement concrete. Slump slump 15 plastic this test method is applicable to plastic concrete having coarse aggregate upto 37. Pdf estimating concrete workability based on slump test with. Even with the increase in knowledge of concrete rheology, the slump test remains. It is more precise and sensitive than the slump test and is particularly useful for concrete mixes of. Aug 26, 2016 the slump test is a neurodynamic test used to assess neurological symptoms such as sciatica, tingling, numbness or burning sensation in the lower limb possibly caused by a hernia or nerve root. Concrete slump test theory and lab test civil engineering. The test is carried out in accordance with bs en 123502, testing fresh concrete. The importance of slump test in concrete work is to ensure. Slump flow is simply the measurement of the diameter of concrete after subsidence in conventional slump test. Furthermore, to construct the hybrid model, this research collected a dataset including actual concrete slump tests from a hydroelectric dam construction project in. Slump plate 500 mm x 500 mm procedure of slump test for concrete.