The test is popular due to the simplicity of apparatus used and simple procedure. 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. Slump slump 15 plastic this test method is applicable to plastic concrete having coarse aggregate upto 37. The glass disc attached to the swivel arm is moved and placed just on the top. Procedure to determine workability of fresh concrete by slump test. Veebee test to determine concrete workability using. The slump test the slump test is done to make sure a concrete mix is workable. The examiner instructs to the patient to flex hisher spine slump, followed by neck flexion. It is more precise and sensitive than the slump test and is particularly useful for concrete mixes of. Compaction factor test of concrete for low workability.
The scope of this field test is to ensure the concretes workability and consistency before casting it. The discussion in this manual is divided into three parts viz. 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. Concrete slump test is carried out from batch to batch to check the uniform quality of concrete during construction. 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. Correlating slump, slump flow, vebe and flow tests to. Standard test method for the slump of hydraulic cement concrete. Compaction factor test of concrete for low workability concrete. 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 is referred to in several testing and building codes, with minor differences in the details of performing the test.
Pdf the sensitivity and specificity of the slump and the. Slump test is performed in the sheet metal cylindrical pot of the consistometer. The test is carried out in accordance with bs en 123502, testing fresh concrete. Workability is the ease with which the given concrete mix can be mixed together. Stand firmly on the footpieces and fill the volume of the cone with the sample. Additional information on workability and quality of concrete. It is used, indirectly, as a means of checking that the correct amount of water has been added to the mix. This test method is used to determine the slump of plastic hydraulic cement concrete. The slump test is a neural tension test used to detect altered neurodynamics or neural tissue sensitivity. The theory part gives brief theoretical background of the experiment while the experimental part outlines the procedure for performing the test. The common factor among sources is the reproduction of pain as tension is applied to the dura during testing. 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. Testing slump in your concrete mix and why it is important.
Slump test is the most commonly used test of measuring workability of concrete. The american standards explicitly state that the slump cone should have a. A 50 cent rheometer for yield stress measurements n. Concrete slump test theory and lab test civil engineering. 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. The purpose of this study was to identify the normative sensory responses to the slump test in asymptomatic subjects. Introduction tensile testing is one of the simplest and most widely used mechanical tests.
The consistency, or stiffness, indicates how much water has been used in the mix. Add water, if necessary, in accordance with astm c 94. 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. The importance of slump test in concrete work is to ensure. Like other neural tension tests, the test may indicate if a patient is experiencing symptoms related to nerves adhering to.
Furthermore, to construct the hybrid model, this research collected a dataset including actual concrete slump tests from a hydroelectric dam construction project in. 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. Initially the sheet metal slump cone is placed inside the cylinder container that is placed in the consistometer. Slump flow is simply the measurement of the diameter of concrete after subsidence in conventional slump test. Tests on concrete concrete slump test, compression test for. Pdf the minislump test is a fast, inexpensive and widely adopted method for. Test for workability of concrete slump cone youtube. It is used conveniently as a control test and gives an indication of the uniformity of concrete from batch to 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. What is the importance of slump test in concrete work answers. Lower slump concrete is very stiff, and higher slump concrete is more fluid. Determination of workability of fresh concrete by slump test aim. Objective the compacting factor test is designed primarily for use in the laboratory but it can also be used in the field. Slump is measured from the highest point according to indian standard code of practice.
Concrete slump test is a measurement of concretes workability, or fluidity. 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. Pdf correlating slump, slump flow, vebe and flow tests. Slump tests the slump test is performed on newly mixed concrete. Its an indirect measurement of concrete consistency or stiffness. 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. Fresh concrete when unsupported will flow to the sides and sinking in the.
A slump test is a method used to determine the consistency of concrete. The slump test indicates the behavior of a compacted concrete cone under the action of gravitational forces. 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. Dimensions 200 x 100 x 300mm h steel tamping rod, dia 16 x 600mm l slump metal base plate 450 x 450mm. It can also be used as an indicator of an improperly mixed batch.
The tamping rod is of steel 16 mm diameter and 60cm long and rounded at one end. 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. Mar 09, 2017 the slump test is perhaps the most widely used because of the simplicity of the apparatus required and the test procedure. Long delivery, waiting, and unloading times, for example, can decrease slump. 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. Slump and kelly ball testing would be performed to investigate workability of mixture. The slump test is a means of assessing the consistency of fresh concrete. Slump cone, scale for measurement, temping rod steel. Concrete slump test experiment procedure civilology. However you define it, though, the bottom line remains the same. Compaction factor test workability test of fresh concrete.
Jun 10, 2015 slump test of concrete to measure workability slump cone test of fresh concrete object. Attempt has therefore been made to correlate slump, slump flow, slump flow time, percent flow and vebe time to rheological parameters of highperformance concrete. The slump plate should be clean, firm, level and nonabsorbent. In the united states, engineers use the astm standards and aashto specifications when referring to the concrete slump test. Slump plate 500 mm x 500 mm procedure of slump test for concrete. Changes in the value of slump obtained during a job may indicate changes in materials, in the water content or in the. To determine workability of concrete by slump test.
Collect a sample of concrete to perform the slum test. Slump flow test is an alternative test for highly workable mixes and has been incorporated in japanese standard. It determines the time required for transforming, by vibration, a concrete specimen in the shape of a. Slump test compaction factor test veebee consistometer test 1. The slump test is described differently among sources. Slump test suitability this method is suitable only for the concrete of high workability. The measured slump must be within a set range, or tolerance, from the target slump. The sensitivity and specificity of the slump and the straight leg raising tests in patients with lumbar disc herniation. The slump test is used as a fast, lowcost diagnostic tool in the evaluation of leg and back pain disorders. Table below shows the veebee time in seconds for various workability as per american concrete institute 211 aci committee 211.
The procedure for conducting the veebee test are as follows. To perform the test, you need a slump cone and a tamping rod. The test is essential for a fuller recognition of the factors contributing to some patients disorders. Concrete slump test for workability procedure and results. Pdf reproducible minislump test procedure for measuring the. A little extra effort to observe good practice is the key to ensure that the concrete properties are properly evaluated. This tests results can be interpreted in multiple ways. Slump adjustment is a fact of life for concrete contractors. Examination and treatment the slump test is becoming more widely accepted as an examination and treatment procedure for all levels of the vertebral column. The slump test is perhaps the most widely used because of the simplicity of the apparatus required and the test procedure. 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 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 slump and slump flow values are plotted in fig. The model used to predict the yield stress from the conical slump test was devised by murata. Slump is a test for the rigidity of uncured concrete. It can be employed either in laboratory or at site of work.
Object the purpose of this experiment is to understand the uniaxial tensile testing and provide knowledge of the application of the tensile test machine. The purpose of this test is to avoid using the lowquality concrete mix for casting. The slump test is really a variant of the slr and the lasegues tests. 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. The slump test is a practical means of measuring the workability. Patient is seated upright with hands held together behind hisher back. It is performed to check the workability of freshly made concrete, and therefore the ease with which concrete flows. Slump test equipment reliance laboratory equipment. It is used conveniently as a control test and gives an indication of the. Materials natural coarse aggregate and siliceous fine aggregate with maximum size of 38 in. Even with the increase in knowledge of concrete rheology, the slump test remains.
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. 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. 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. To assess whether a herniated disc, neural tension, or altered neurodynamics are contributing to the patients symptoms. 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. It is not a suitable method for very wet or very dry concrete.
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 is carried out as per procedures mentioned in astm c143 in the united states, is. Eightyfour subjects were tested using a standardized procedure by the same examiner to ensure consistency. 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 ease with which one can use concrete is called workability. It is one of the physical parameters of concrete which affects the finesse, strength and durability. Used to determine the consistency of concrete mixes having medium and high workability. Concrete slump test is carried out from batch to batch to check the uniform quality of. 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. Slump test is used to determine the workability of fresh concrete. The sensitivity and specificity of the slump and straight leg raised tests in patients with lumbar disc herniation. 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. The apparatus used for doing slump test are slump cone and tamping rod. It determines the time required for transforming, by vibration, a concrete specimen in the.
When the mortars and concretes for which the final slump was less than 100 mm are excluded, the measured slump times range from 0. Title objective theory apparatus procedure result discussion reference. The compacting factor test is performed to find out the workability of concrete. A small variation in slump caused by improper procedure or equipment,may cause the rejection of an entire load of concrete. They also provide a ball bearing effect, making the concrete easier to finish, and produce better cement hydration. 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 measures the consistency of fresh concrete before it sets. 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. Pdf estimating concrete workability based on slump test with. The slump test result is a measure of the behavior of a compacted inverted cone of concrete under the action of gravity.
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