This device is used to determine the workability and degree of compaction of fresh concrete after being placed in the forms. Iron pan to mix concrete, weighing machine, trowel slump, cone, scale, and tamping rod. Workability of concrete is mainly affected by consistency i. Steel slump cone kit huge thanks to make sure your. Concrete slump is generally known to affect the consistency, flowability, pumpability, compactibility, and harshness of a concrete mix. It can also be used as an indicator of an improperly mixed batch. Patient should be sitting on the edge of the table. It is used to check the workability of freshly made concrete for the easy placement of concrete. Sampling concrete mix m15 is blended according to the specified mix design in the laboratory. Slump test measures the consistency or workability of concrete. This method is very suitable for very dry concrete whose slump value cannot be measured by slump test, but the vibration is too vigorous for concrete with a slump greater than about 50 mm. It is performed to check the workability of freshly made concrete, and therefore.
In this test the amount of compaction obtained by spending a known amount of energy is measured. The word workability defines an amalgam and composite of four concrete flowmaking physical properties like mixability, transportability, mouldability, and compatibility you cant ignore this physical parameter because of the fact that it effects the strength, durability, cost of labor, compaction effort, and also the final appearance. Stand firmly on the footpieces and fill the volume of the cone with the sample. The ease with which one can use concrete is called workability. The studies were limited to ultrahigh strength concretes16 or mortars17. The concrete slump test is, in essence, a method of becoz,quality control. 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 workability, high performance concrete, slump, compacting factor, vebe time, viscosity, mobility, fluidity. Workability of concrete and compaction factor test. According to acis cement and concrete terminology aci 116r90, no slump concrete is freshly mixed concrete exhibiting a slump of less than 14 inch. The slump test is the most widely used test for measuring concrete workability. Tip 11 testing concrete cores the strength of cores is used to verify the quality and strength of concrete in structures. The slump test is a way to measure the workability of concrete.
Feb 01, 2009 we use your linkedin profile and activity data to personalize ads and to show you more relevant ads. United kingdom and mainland europe edit 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. Each batch and mix was evaluated to obtain the workability by slump test as shown in fig. For a particular mix, the slump should be consistent. Begin and complete slump test within 212 minutes, maximum. It is one of the physical parameters of concrete which affects the finesse. Standard test method for slump of hydrauliccement concrete. Unworkable concrete need more work or effort to be compacted in. Concrete slump testing is used to evaluate the flow characteristics of freshly mixed concrete.
The slump and slump flow values are plotted in fig. As the name suggests, in this test the workability of concrete is determined by examining the flowing property of concrete. Slump cones top diameter is 10 cm, bottom dia is 20 cm and height is 30 cm. Slump test of concrete workability of concrete youtube. 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.
The purpose of this test its to place tension on the dural sheath of the sciatic nerve. The slump is carried out as per procedures mentioned in astm c143 in the united states, is. Determination of workability test for concrete civil engineering animated videos, civil. Move the glass disc attached to the swivel arm and place it just on top of the. It is used, indirectly, as a means of checking that the correct amount of water has been added to the mix. Karim kay nasser, a professor at the university of saskatchewan, the k slump tester provides fast, onthespot estimates of fresh concrete slump and workability. The first two tests are laboratory tests while the third test is the field test. Other researchers used rheometers to assess the frc fresh behavior. The base is placed on a smooth surface and the container is filled with concrete in three layers, whose workability is to be tested. It is the most commonly used test and gives a good assessment of filling ability. High workability concrete requires little compactive effort, yet does not segregate.
Collect a sample of concrete to perform the slum test. Slump cones and accessories are available bundled as concrete slump test kits for convenience. Concrete slump test is carried out from batch to batch to check the uniform quality of concrete during construction. 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. The slump test consists of several different steps. The slump cone is a hollow frustum made of thin steel sheet with internal dimensions, as the top diameter 10 cm. Workability analysis of steel fiber reinforced concrete using. Introduction the concrete slump test just like compacting factor test measures the consistency of fresh concrete before it sets. A perfect chanel for the engineers and general personnel. The test is carried out in accordance with bs en 123502, testing fresh concrete. The concrete slump test is an onthespot test to determine the consistency as well as workability of fresh concrete. Place the slump cone in the sheet metal pot of the consistometer and fill it with fresh concrete as described in the slump test. Flow table test of concrete to test workability of concrete. Workability is a complex property of concrete which is defined as the ease with which it can be mixed, transported and placed in position within a homogenous state.
Test methods for workability of self compacting concrete 1. Results can theoretically be correlated against the slump test. This test is performed to check the workability or consistency of freshly mixed concrete in a specific batch. Pdf predicting the workability of fresh concrete using simple. Slump test is used to determine the workability of fresh concrete. A synthesis of more than 61 existing test methods for workability characterization found that available devices vary widely in their.
When the water content is too much, concrete strength is diminish. Slump test is the most common, easy and simple tests adopted to measure the workability of fresh concrete. The scope of this field test is to ensure the concretes workability and consistency before casting it. This test works on the principle of determining the degree of compaction achieved by a standard amount of work done by allowing the concrete to fall through a. The tendency for more workability is more water to cement ratio. Before knowing the term workability let us look at some of the definitions given by scientists and researchers. It can be used at the site, the test also indicates the resistance to. It is performed to check the workability how easily concrete can be placed and compacted of freshly made concrete, and therefore the ease with which concrete flows. Standard test method for the slump of hydraulic cement concrete. In this paper, we propose a 4d slump test method based on digital measurement and data processing as a novel concrete workability test. Concrete slump test procedure applications, types, uses.
Lower slump concrete is very stiff, and higher slump concrete is more fluid. Concrete slump test is only carried out where the nominal maximum size of. Furthermore, to construct the hybrid model, this research collected a dataset including actual concrete slump tests from a hydroelectric dam. Since the introduction of the slump test, a myriad of workability test methods have been developed. As stated above slump test is essentially a measure of consistency or the wetness of the concrete mix. Workability of concrete types and effects and test on. The apparatus used for doing slump test are slump cone and tamping rod. Let us check how can we do slump test of fresh concrete. The use of highly fluid concretes, the rheology of which cannot be suitably characterized with the slump test astm c 143 alone, has resulted in the emergence of many new methods for characterizing the flow of freshly mixed concrete. This research proposes a machine learning model for predicting. 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.
This test plays a vital role in ensuring immediate concrete quality in a construction project. It is more precise and sensitive than the slump test and is particularly useful for concrete mixes of very low workability and normally used when concrete is to be compacted by vibration. Pdf workability analysis of steel fiber reinforced concrete. Pdf workability is one of the physical parameters of concrete which. Sep 05, 2014 all about workability of concrete, slump test, vee bee test and compaction factor test duration. Apr 26, 2018 workability of concrete is the property of freshly mixed concrete which determines the ease and homogeneity with which it can be mixed, placed, consolidated and finished without segregation and bleeding. Apparatus used for cone test procedure 1measuring scale 2tamping rod. 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. Tests on concrete concrete slump test, compression test.
This video animation, animated video explains the procedure for determination of concrete slump test. 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 mm 58 in dia and hemispherical tip at both ends. The purpose of this test is to avoid using the lowquality concrete mix for casting. This test works on the principle of determining the degree of compaction achieved by a standard amount of work done by allowing the concrete to fall through a standard height. Concrete slump test for workability procedure and results. In simple words, workability means the ease of placement and workable concrete means the concrete which can be placed and can be compacted easily without any segregation. Workability analysis of steel fiber reinforced concrete using slump and vebe test article pdf available november 2015 with 1,056 reads how we measure reads. Evaluation of consistency properties of freshly mixed concrete. Astm c143143m standard test method for slump of hydraulic cement concrete. Workability of concrete definition factors affecting. The compacting factor test is designed primarily for use in the laboratory but it can also be used in the field.
The test is popular due to the simplicity of apparatus used and simple procedure. Fresh behavior of concrete was assessed by conducting slump test. Slump test for concrete to determine its workability. The mold for the concrete slump test is a frustum of a cone, 300 mm 12 in of height. A little extra effort to observe good practice is the key to ensure that the concrete properties are properly evaluated. Oct 08, 2004 however you define it, though, the bottom line remains the same. Testing slump in your concrete mix and why it is important. In almost every country in the world people refer to the workability of concrete in terms of its slump. Workability of concrete types and effects on concrete strength. It is performed to check the workability of freshly made concrete, and therefore the ease with which concrete flows. Hence, an accurate prediction of this property is a practical need of construction engineers. Mar 24, 2020 this test can be used as a control test and gives an indication of the concrete uniformity from batch to batch. Workability of concrete is better determined by compaction factor test.
Estimating concrete workability based on slump test with least. To conduct a slump test, concrete is placed into an inverted cone in three stages, using a metal rod to tamp down the concrete after every stage. If the slump test result is outside of the slump range, correct before placing th e concrete in the work. The steel slump cone is placed on a solid, impermeable, level base and. Different test methods for workability of self compacting. Concrete slump test to check the workability of concrete. Slump is a test for the rigidity of uncured concrete. In this test, slump test as mentioned above is performed by placing the slump cone inside the sheet metal cylindrical pot. Even with the increase in knowledge of concrete rheology, the slump test remains the predominately used test method for measuring concrete workability. The slump plate should be clean, firm, level and nonabsorbent. The concrete slump test measures the consistency of fresh concrete before it sets. All about workability of concrete, slump test, vee bee test and compaction factor test duration.
Compaction factor test workability test of fresh concrete. Procedure to determine workability of fresh concrete by slump test. Definition of noslump concrete concrete construction. Slump test of concretecone test procedure readcivil. Tests for workability of concrete at construction site and. What is the slump value for concrete having high workability.
Most commonly, cores are extracted when there is a reported low strength test result of standard cured cylinders. Visualization of concrete slump flow using the kinect sensor mdpi. Tests on concrete concrete slump test, compression test for. Materials natural coarse aggregate and siliceous fine aggregate with maximum size of 38 in. It is particularly useful for concrete mixes of very low workability or very dry concrete as they are insensitive to slump 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. The slump test is a practical means of measuring the workability. Procedure for workability test of concrete vee bee test these are the various steps involved in vee bee test procedure. Concrete workability, quantified by concrete slump, is an important property of a concrete mixture. Correlating slump, slump flow, vebe and flow tests to. Measure slump from the top of the mold to the displaced original center of the concrete. High workability can be achieved in many ways but in general it will require the use of a plasticising admixture. Slump test procedure is performed to check the workability of concrete.
First the patient slumps forward, rounding the shoulders. Astm defines it as that property determining the effort required to manipulate a freshly mixed quantity of concrete with. With the exception of the widely used slump test, the few methods that have been studied extensively have generally failed to gain widespread acceptance. Consistency is a general term to indicate the degree of fluidity or the degree of mobility. 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. Powers defined it as that property of plastic concrete. More specifically, this test is performed to measure the consistency of the fresh concrete. Zero slump zero slump is the indication of very low watercement ratio, which results in dry mixes. 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 for greater assurance of water cement. Workability of concrete is the property of freshly mixed concrete which determines the ease and homogeneity with which it can be mixed, placed, consolidated and finished without segregation and bleeding. Slump test gives an idea of only the flowing property of wet concrete and not of the workability.
Since fibers impart considerable stability to a fresh concrete mass, the slump cone is not considered as a good index of workability. The concrete slump test is a measure of the workability of fresh concrete. Estimating concrete workability based on slump test with. Workability means how easily the concrete can be mixed, handled, transported, placed in position and compacted. If necessary, modify sampling procedures to fit a specific situation. Slump test of concrete determination of workability of.
The slump test is done to make sure a concrete mix is workable. 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. Workability of concrete test slump test a concrete slump test is carried out with a mould called slump cone. To determine the workability or consistency of a concrete mix of given proportion by slump test. To assess the workability of concrete using compaction factor test apparatus compaction factor apparatus trowels hand scoop 15. The slump test is used for checking the workability of concrete. It consists of a vibrating table, a metal pot, a sheet of metal cone and a standard iron rod. So it is our responsibility to ensure that the concrete is in good quality. Concrete slump test experiment procedure civilology. Apr 03, 2017 veebee test is a good laboratory test suitable for stiff concrete mixes having low and very low workability. It can be used for insitu measurements or inside test moulds and forms.
The reason for the popularity of the slump is that the equipment is light and portable and the test is simple and easy to carry out. These type of concrete is generally used for road construction. Nevertheless, it is not an adequate tool for assessing lowslump concrete workability. Workability tests for concrete workability have attempted to. Workability of concrete is the property of freshly mixed concrete which determines the ease and homogeneity with which it can be mixed, placed, consolidated and finished as defined by aci standard 116r90 aci 1990b. 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 time required for the shape of concrete to change from slump cone shape to cylindrical shape in seconds is known as vee bee degree. Flow table test of concrete also determines the quality of concrete concerning its consistency, cohesiveness and the proneness to segregation. 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. Zero slump concrete is defined in the same document, as concrete of stiff or extremely dry consistency showing no measurable slump after removal of the slump cone.
For example, the slump test has been the most specified workability test, but it measures the consistently of fresh concrete to fall under its own weight. Workability of concrete determination by slump test. Most workability tests measure various properties of fresh concrete, but very few tests measure a useful workability property for a certain application. The slump flow test is done to assess the horizontal flow of concrete in the absence of obstructions. A small variation in slump caused by improper procedure or equipment,may cause the rejection of an entire load of concrete. Collapsed slump this is an indication that the watercement ratio is too high, i. May 15, 2018 this video animation, animated video explains the procedure for determination of concrete slump test. The base is 200 mm 8in in diameter and it has a smaller opening at the top of 100 mm 4 in. Concrete slump test can either be carried out in the lab or on site during the progress of work. The slump test is a means of assessing the consistency of fresh concrete. A change in slump height would demonstrate an undesired change in the ratio of the concrete ingredients. 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 is performed by packing a metal cone with the concrete according to a specified procedure, then lifting the metal cone off the pavement and measuring the fall of the top. D urham geo slope indicator section concrete plastic. Test for workability of concrete slump cone youtube. Summary of concrete workability test methods the university of. Since 1922 slump test has been widely used to check out the concrete workability at the site. The measurement of workability, now referred to as consistence in standards, is undertaken using consistence tests such as slump, flow or slump. 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. Ce33 slump con c351 aluminum base with handle and tamping rod related items cl354 slump cone funne gr15910 armored concrete thermomete. Definitions of workability of concrete according to granville it is that property of the concrete which determines the amount of useful internal work necessary to produce full compaction. Measurement of workability of fresh concrete using a. Workability is a property of raw or fresh concrete mixture.
The measured slump must be within a set range, or tolerance, from the target slump. Perform correlation tests several times throughout the day. This test is carried out with a mould called slump cone whose top diameter is 10cm, bottom diameter is 20 cm and height is 30 cm. 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. Mar 09, 2017 the slump test indicates the behavior of a compacted concrete cone under the action of gravitational forces. Before adding plasticizers or superplasticizers to your fresh concrete, you need to check the workability of your concrete. Vee bee testdefinition and procedure workability of.
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