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. The sensitivity and specificity of the slump and straight leg raised tests in patients with lumbar disc herniation. Here are the steps to do the slump test of concrete. The proposed experimental procedure for minislump testing produces highly reproducible results, and the yield stress calculated from. It measures the consistency or the wetness of concrete which then gives an idea about the workability condition of concrete mix.
Mar 09, 2017 the slump test is perhaps the most widely used because of the simplicity of the apparatus required and the test procedure. Slump the concrete is required to be workable and of the desired consistency. 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. Standard test method for slump of hydrauliccement concrete. Zero slump zero slump is the indication of very low watercement ratio, which results in. As a minimum, corrective actions are required for the slump, air content, unit weight, watercementitious ratio, water absorption, and depth of cover. Equation 1 can be used to determine the water cement ratio required to produce the desired slump. 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. This is a measure of the relative fluidity or mobility of the concrete mixture. Perform a slump test using the procedure given below.
This test can be used as a control test and gives an indication of the concrete uniformity from batch to batch. 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. The apparatus used for doing slump test are slump cone and tamping rod. Discussion and conclusion in result we get zero slump, in this time we must repeat the test, but with different mix design and watercement ratio, for obtaining true slump. Cube and slump test report density concrete scribd. A concrete slump test is used to determine the correct water content in a batch of concrete.
This method of test specifies the procedure to be adopted, either in the laboratory. This article supports the use of the slump test over the straight leg. What do the contractor and concrete producer do with them. Determine the arithmetic average of any three 3 consecutive strength test results.
Response to test results the contractor is required to take corrective action when quality control test results exceed the established limits. Workability, slump and compacting factor of concrete with 19 or 38 mm 34 or 1 1 2 in maximum size of aggregate. It is expected that slump test can provide accurate results to identify the effects of sand concentration, foam. This test method was originally developed to provide a technique to monitor the consistency of unhardened concrete. This tests results can be interpreted in multiple ways. Concrete slump test the concrete slump test is an onthespot test to determine the consistency as well as workability of 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 method 1 2 3 5 6.
The slump test is used to ensure uniformity for different loads of concrete under field conditions. Conclusion the experiment yielded the following conclusions. Pdf reproducible minislump test procedure for measuring the. Slump is the distance, measured in inches, the concrete settles after the slump cone is removed. Due to this fact, it has been widely used for workability tests since 1922. Air entrainment before and after redosing admixtures. A little extra effort to observe good practice is the key to ensure that the concrete properties are properly evaluated. Lets say the work is progressing and test reports are being provided routinely. The slump operation shall be completed in a maximum elapsed time of 2 12 minutes. Zero slump zero slump is the indication of very low watercement ratio, which results in dry mixes. The slump test indicates the behavior of a compacted concrete cone under the action of gravitational forces. A wheelbarrow meets the requirements of all the aashto test methods used for acceptance testing of concrete by indot and therefore is generally used as the sampling and mixing container.
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. Lab 1 concrete proportioning, mixing, and testing supplemental lab manual prepared by mutlu ozer objectives concepts. The unit includes sampling and slump testing to a set range. The concrete slump test measures the consistency of fresh concrete before it sets. A concrete batch with high slump is an indication that the concrete has to much water in it and will likely be weak when fully cured. When the mortars and concretes for which the final slump was less than 100 mm are excluded, the measured slump times range from 0. The slump plate should be clean, firm, level and nonabsorbent. The compression test measures concrete strength in the hardened state. Any slump speci men which collapses or shears off laterally gives incorrect result and if this occurs the test shall be repeated with another sample. Concrete temperature before and after redosing admixtures. Slump plate 500 mm x 500 mm procedure of slump test for concrete.
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. Although the straight leg raise test is sometime taught as the gold standard for rulingin lumbar disc herniations, the results of this study indicate that the slump test may be a more accurate tool. In comparison, the straight leg raise test had sensitivity and specificity levels of 52% and 83%, respectively. Estimating concrete workability based on slump test with.
A separate test, known as the flow table, or slump flow, test, is used for concrete that is too fluid workable to be measured using the standard slump test, because the concrete will not retain its shape when the cone is removed. Pdf reproducible minislump test procedure for measuring. Using this test, the slump can be derived by measuring the drop from the top of the slumped fresh concrete. Any slump specimen which collapses or shears off laterally gives incorrect result. The slump test had sensitivity and specificity levels of 84% and 89%, respectively. The test is essential for a fuller recognition of the factors contributing to some patients disorders. The slump test is done to make sure a concrete mix is workable. Cpccco3053a slump test concrete date this document was generated. Sep 16, 2014 here are the steps to do the slump test of concrete. The test procedure of veebee test carries out the similar procedure that a freshly mixed concrete is subjected to in its actual state. True slump true slump is the only slump that can be measured in the test. The results are applicable only to the specific concrete sample tested and may not be indicative of the strength or quality of other concrete placed on this date.
Like other neural tension tests, the test may indicate if a patient is. Acceptance testing and criteria are give in section 8. The slump test is the most simple workability test for concrete, involves low cost and provides immediate results. The test results are given in appendix iv for ordinary concretes, appendix v for concretes with admixtures, and appendix vi for concretes with silica fume and with intermediate dosages of hrwras. The measured slump must be within a set range, or tolerance, from the target slump. The measurement is taken between the top of the cone and the top of the concrete after the cone has been removed as shown in figure1.
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. Sep 22, 2017 the slump test is used to ensure uniformity for different loads of concrete under field conditions. If the slump test result is outside of the slump range, correct before placing the concrete in the work. Report slump test concrete building materials scribd. Materials natural coarse aggregate and siliceous fine aggregate with maximum size of 38 in. The technique depicted below is adapted from mark dutton. With the exception of the widely used slump test, the few methods that have been studied extensively have generally failed to gain widespread acceptance. It is performed to check the workability of freshly made concrete, and therefore the ease with which concrete flows. Collapsed slump this is an indication that the watercement ratio is too high, i. The attached handle can be rotated above the specimen and used as a guide to measure the slump. Slump cone sets slump cone set the portable slump test set includes all tools necessary to conduct a slump test on a sample of freshly mixed concrete. Collect a sample of concrete to perform the slum test. Step 1, normally, is to give the report a quick glance to look for a red stamp that signals an unsatisfactory result. The slump test is a measure of this workability and consistency and is required to be conducted in accordance with section 505.
Although aashto t 141 does not define the sampling container, other test methods are very specific on acceptable types of containers. Tests on concrete concrete slump test, compression test for. The slump test is a neural tension test used to detect altered neurodynamics or neural tissue sensitivity. Use of the slump test over the straight leg raise test. Cube and slump test report free download as word doc. The concrete slump test is an onthespot test to determine the consistency as well as workability of fresh concrete. This is an added advantage of vee bee test when compared with other tests, the slump test and the compaction factor test. The test results of the sample shall be the average of the strength of three. The slump test is the most common method for assessing the flow properties of fresh concrete.
Standard test method for the slump of hydraulic cement concrete. 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 test order was randomized for each subject and the two tests were separated by one day washout period. Table 2 shows the slump test results and the air content2results. The slump is carried out as per procedures mentioned in astm c143 in the united states. The slump test is described differently among sources. The slump test the slump test is done to make sure a concrete mix is workable. The slump test is suitable for slumps of medium to high workability, slump in the range of 5mm to 260 mm, the test fails to determine the difference in workability in stiff mixes which have zero slump, or for wet mixes that give a collapse slump. The common factor among sources is the reproduction of pain as tension is applied to the dura during testing. The corrective actions shall be designated in the qcp. It was found that the variation of mould lifting velocity had a greater influence on slump than spread, indicating that spread is a more appropriate measurement for determining the yield stress in a mini slump. Field concrete technician study guide 9 gdt 27 slump of portland cement concrete the purpose of the slump test is to determine the consistency of the 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.
For each mixture, the data collected from the measurements of the modified slump tests, the density, and the bingham. These type of concrete is generally used for road construction. Experimental results show that the proposed model is capable of predicting concrete slump accurately. This research recorded testing results of 95 concrete mixes during the construction. Although the straight leg raise test is sometime taught as the gold standard for rulingin lumbar disc herniations, the results of this study indicate. The slr and slump tests were performed three times on each patient by independent testers who were blinded to the result of the first test. Use of the slump test over the straight leg raise test for. The concrete slump test is referred to in several testing and building code, with minor differences in the details of performing the test. Like other neural tension tests, the test may indicate if a patient is experiencing symptoms related to nerves adhering to. It should be noted that equation 1 has only been validated for the experimental mix design used in this experiment. Investigations of the flume test and minislump test for.
The slump test is a practical means of measuring the workability. The minimum value of slump 1 25mm slump test the maximum value of slump 4 100mm. Estimating concrete workability based on slump test with least. Pdf estimating concrete workability based on slump test with.
Stand firmly on the footpieces and fill the volume of the cone with the sample. A true slump is the only measurable slump in the test 3. Compressive strength of concrete hardened concrete 1 g. Concrete slump test for workability procedure and results. The slump flow of concrete is not only determined by the water content, but that is also influenced by other concrete ingredients.
The slump is carried out as per procedures mentioned in astm c143 in the united states, is. There is a direct nonlinear relationship between the water cement ratio and the slump. Slump test is the most commonly used method of measuring consistency of. Reproducible mini slump test procedure for measuring the yield stress of cementitious pastes article pdf available in materials and structures 506 december 2017 with 1,027 reads. The slump cone apparatus for conducting the slump test essentially consists of. Even with the increase in knowledge of concrete rheology, the slump test remains. This test s results can be interpreted in multiple ways. Concrete slump test this test is performed to check the consistency of freshly made concrete. Filling and compaction in 3 equal layers with minimum of 35 strokes compressive strength of concrete. The slump type for our group was normal with a slump of 2. Examination and treatment the slump test is becoming more widely accepted as an examination and treatment procedure for all levels of the vertebral column. Shear slump the shear slump indicates that the result is incomplete, and. Acceptance testing and criteria for ready mixed concrete.
Slump test is used to determine the workability of fresh concrete. Concrete slump test procedure applications, types, uses. Results provide clear evidence of the secondary slump phenomenon with a consistent decline in each of the four parental involvement subscales parent modeling, parent instruction, parent encouragement, parent reinforcement and with female students reported significantly higher levels of parental involvement than males. Site testing slump test always do your slump test before making your cubes to ensure the concrete is usable. The unique base design allows all components to be combined into a onepiece unit. Test parameters per applicable standards, the following tests were performed on concrete batches at these time lapses. A separate test, known as the flow table, or slump flow, test, is used for concrete that is too fluid nonworkable to be measured using the standard slump test, because the concrete will not retain its shape when the cone is removed. The slump test based on the astm c143 astm 2004 standard has been widely used as the most common method for evaluating the flow properties of fresh concrete and cement pastes. The slump test indicates the behavior of a compacted concrete cone under the. Specification for concrete slump test apparatus by bureau of indian standards.
Veebee test to determine concrete workability using. For each mixture, the data collected from the measurements of the modified slump tests. The slump test is particularly prone to human error the. 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. Parental involvement, student active engagement and the. The test is popular due to the simplicity of apparatus used and simple procedure. Reproducible minislump test procedure for measuring the yield stress of cementitious pastes article pdf available in materials and structures 506 december 2017 with 1,027 reads. Acceptable slump ranges are designated in section 707. Cpccco3033a slump test concrete modification history not applicable unit descriptor unit descriptor this unit of competency specifies the outcomes required to conduct a slump test to concrete to ensure the mix is workable and complies with the delivery docket and specified order. Zero slump shows that the workability is very low, collapsed slump shows that the workability is too high and shear slump indicates that concrete needs to be retested as the results are incomplete. Conclusion slump test to determine the relative water. Compressive strengths of concrete cylinders from ultrasonic pulse velocity test astm c597. It can also be used as an indicator of an improperly mixed batch.
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