May 10, 20 objective for determination of consistency of concrete where the nominal maximum size of aggregate does not exceed 38 mm using compacting factor test apparatus. In slump test we have to provide a uniform base and it requires 4 times for compacting the concrete to fill the cone while without disturbing the. 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. Workability of fresh concrete by compacting factor test. One of the most remarkable projects built using self compacting concrete is the akashikaikyo suspension bridge. The compacting factor test has been developed at the road research laboratory u. Compacting factor apparatus, concrete testing equipment, controls. Compacting factor apparatus, concrete testing equipment.
The compacting factor test is designed primarily for use in the laboratory but it can also be used in the field. The number of tamping of strokes per layer varies with the type of concrete. Procedure to determine workability of fresh concrete by compacting factor test. It also includes procedure for filling and compacting concrete as well as methods of testing of concrete. To determine the workability of fresh concrete of given proportions by slump test and compacting factor test. Compacting factor test to determine its workability civil. Compaction factor test for concrete test for workability of. The compaction of concrete by hand is done by using a standard tamping bar. Compacting factor apparatus consists of two conical hoppers mounted above a cylindrical mould and.
Selfcompacting concrete scc is a flowing concrete that does not require vibration and, indeed, should not be vibrated. Compacting factor the degree of compaction is also called the compacting factor and is measured with the help of density ratio that is the ratio of density actually achieved in the test to the density of same concrete when it is fully compacted. To determine the workability of concrete mix of given proportions by compacting factor test. Selfcompacting concrete is a recent development that shows potential for future applications. The two tests, compacting factor and degree of compactability are quite different. This standard covers the test method for slump flow of selfcompacting concrete with a maximum coarse aggregate size of 40 mm or less. Compaction factor test it is more accurate than slump test for concrete mixes and value of compaction factor of 0.
Sampling concrete mix m15 is blended according to the specified mix design in the laboratory. Concrete slump and compacting factor test values and uses. Compacting factor test is mainly used in laboratory to determine workability of concrete. But it is simpler to apply a standard amount of work to the concrete and to. It is more precise and sensitive than the slump test.
Selfcompacting concrete procedure for mix design paratibha aggarwal, rafat siddique, yogesh aggarwal, surinder m gupta figure 2. Its maximum answer is 1 but practically it is lesser than 1. In this project, the scc was mixed onsite and pumped through a piping system to the specified point, located 200 meters away. This standard covers the test method for slump flow of self compacting concrete with a maximum coarse aggregate size of 40 mm or less. Jul 09, 2018 self compacting concrete scc is a flowing concrete that does not require vibration and, indeed, should not be vibrated. May 18, 2018 this video animation, animated video explains the procedure for determination of workability by compaction factor test. Workability of concrete is better determined by compaction factor test. 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. Jan 24, 2018 workability of concrete compacting factor test aim. Following tables shows the degree of concrete workability based on the results of slump tests and compacting factor tests. A similar analysis to slump was carried out for compacting factor based on the standard compacting factor test results as shown in fig.
Compaction factor test for concrete workability method and. Slump test doesnt give accurate results for the low workability of concrete when the slump is compaction factor test used for concrete mixes of very low workability. Compacting factor test it is more precise and sensitive than the slump test and is particularly useful for concrete mixes of very low workability as are normally used when concrete is to be compacted by vibration. S elfcompacting concrete is a special kind of concrete that can permeate and fill the gaps o f reinforcement and the corners of molds without a ny desideratum o f vibration a nd. Comprising two conical hoppers having a hinged trap door attached to the lower end of each hopper, allowing the concrete sample to flow freely into the cylindrical mould. Compacting factor apparatus consists of two conical hoppers mounted above a cylindrical.
Methods of compaction of concreteconcrete technology. Nov 15, 2017 the compacting factor test is performed to find out the workability of concrete. Compaction factor test workability test of fresh concrete. The features on the fresh state have influence on the production process, whereas the mix that are easily compacted demands less strength of the equipment and also will result on paving units that. Compaction factor test of concrete for low workability concrete. Selfcompacting concrete has been used in bridges and even on precast sections. Although the most common method of determining workability is the slump test, it does not give an accurate result for the concrete with less workability, especially then the workability is less than 50 mm. The utc0570 kelly ball apparatus consists of a 152mm diameter ball which slides through a frame that rests on the fresh concrete. In this test, the compaction achieved through a free fall of concrete determines its workability. Procedure the sample of concrete to be tested is placed.
It meets the demands placed by the requirements of speed and quality in concrete construction. The test is straightforward and inexpensive and can be quickly executed on inplace concrete. Compacting factor test to determine its workability. Compacting factor test of concrete we civil engineers. What is the maximum possible value of compacting factor. Compacting factor apparatus, balance, weights, trays, tamping rod and trowels. Compaction factor test for concrete workability method. W is the estimated consistency parameters which include slump, compacting factor and vebe time, corresponding to a. The simple pullout test was recommended as an alternative test to compacting factor, slump and vb consistometer tests in measuring. The compaction factor test is used for concrete which have low workability for which slump test is not suitable. Compacting factor test lab report building materials. Compacting factor test is an experiment that determines the consistency of freshly mixed concrete.
Compaction factor apparatus consists of trowels, hand scoop 15. One of the most remarkable projects built using selfcompacting concrete is the akashikaikyo suspension bridge. Slump test doesnt give accurate results for the low workability of concrete when the slump is workability of concrete. The compacting factor test is conducted to determine the workability of fresh concrete.
Jun 17, 2019 self compacting concrete has been used in bridges and even on precast sections. Pdf predicting the workability of fresh concrete using simple. The slump and compacting factor test values shown below are of concretes with 20mm or 40mm maximum size of aggregates. Summary of concrete workability test methods the university of. Hence to overcome these defects the self compacting concrete is used. S elf compacting concrete is a special kind of concrete that can permeate and fill the gaps o f reinforcement and the corners of molds without a ny desideratum o f vibration a nd. Dry concrete, also known as noslump concrete and earthmoist concrete, is used to manufacture paving units and demands vibrocompressers to be molded. By using standard tamping bar, we can distribute the concrete in a uniform manner along the crosssection of the mould.
Based on current research and available knowledge about scc presented in this paper, the following trends are emerging. For the compacting factor test, the top hopper is filled with concrete. Compaction factor test for concrete test for workability. Compacting factor test lab report building materials stuvia. Slump test doesnt give accurate results for the low workability of concrete when the slump is factor test is used for concrete which have low workability for which slump test is not suitable. But it is simpler to apply a standard amount of work to the concrete and to measure its degree of.
Selfcompacting concrete applications and advantages. Concrete workability, high performance concrete, slump, compacting. Key words concrete workability, high performance concrete, slump, compacting factor, vebe time, viscosity, mobility, fluidity 18. Test results showed that, in case of good concrete mix design, the addition of suitable fraction volume of glass or polypropylene fiber up to 0. Workability of concrete compacting factor test civil4m. 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 uses super plasticisers and stabilizers to significantly increase the ease and rate of flow. May 06, 2016 in this test, the compaction achieved through a free fall of concrete determines its workability. Jan 05, 2020 the compacting factor test is conducted to determine the workability of fresh concrete. The compacting factor test has been developed at the road research laboratory in united kingdom. Concrete has to be heavily vibrated for flow into very intricate forms or forms that have a lot of reinforcing bars.
Lbox test experimental procedure the procedure adopted in the study is as follows 1 using japanese method of mix design, initial mix design was carried out at coarse. Compacting factor article about compacting factor by the. Sep 11, 2017 workability of concrete is better determined by compaction factor test. Objective for determination of consistency of concrete where the nominal maximum size of aggregate does not exceed 38 mm using compacting factor test apparatus.
Civil engineering animated videos, civil engineering videos social media. This video animation, animated video explains the procedure for determination of workability by compaction factor test. Workability of concrete and compaction factor test. The maximum possible value of compacting factor for fresh green concrete is considered to be 1 theoretically, but lets look into it in a pragmatic way.
The compacting factor test has been developed at the. Compaction factor test of concrete for low workability. The workability of concrete has also been defined as the amount of work required to place the concrete and to compact it thoroughly. The most common test for hardened concrete is the compressive strength, at a particular period of time, from the time of casting the concrete cubes. All about workability of concrete, slump test, vee bee test and compaction factor test duration. The compacting factor apparatus is used to determine the compaction factor of concrete with low, medium and high workability. Compaction factor test is designed in such a way that it can be used only in laboratory but in some cases, it can be used for field concrete tests. Workability of concrete compacting factor test youtube.
Selfcompacting fiber reinforced concrete request pdf. Lab report for compacting factor test civil engineering notes. It is not easy to measure the amount of work required to fully compact it. Concrete is a mixture of cement, sand, gravel and water which dries hard and strong and is used as a material for building. Hence to overcome these defects the selfcompacting concrete is used. Slump test and compacting factor test of fresh concrete. This has now been withdrawn and replaced by bs en 123504. In this test the amount of compaction obtained by spending a known amount of energy is measured. If the slump value is less than 50 mm, then this test gives more. Concrete compacting factor test free download as powerpoint presentation. What is the different slump test and compacting factor. It is not suitable for concrete of very low workability of 0.
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