compaction factor of fresh green concrete.
May 23, 2017· Watch this video to learn about compaction factor, its advantages & disadvantages and the test on fresh concrete by compaction factor. Department: Civil Engineering Subject: Concrete Technology ...
Experiment :- To determine the workability of Fresh Concrete of given proportions by Slump Test and Compacting Factor Test. Workability of a concrete signifies the full compaction of concrete using a required or reasonable amount of work which helps to achieve the desired possible density or void of fresh concrete resulting better strength and durable concrete structure and helpful to maintain ...
The simple pull-out tes t for fresh concrete is recommended as an alter native test to compacting factor, slump and V-B cons istometer test in measur ing workability 5.
There are various methods of testing which is available to measure the workability of fresh concrete such as slump test, compacting factor test, flow test, Kelly ball test, Vee Bee consistometer test etc. Here, we are discussing compaction factor test (compacting factor test) i.e. test procedure, testing apparatus, recommended criteria, etc.
Sep 11, 2017· Any surplus concrete from the cylinder is removed in the manner explained before. The weight W 2 of the concrete in the cylinder is found out. The ratio of the two weights W 1 /W 2 is known as the compaction factor. A compaction factor of 0.85 represents a mix of poor workability, 0.92 represents medium and 0.95 good workability.
Jan 25, 2017· Objective: To assess the workability of concrete (using compaction factor test) Apparatus Compaction factor apparatus' trowels Hand scoop (15.2 cm long) Steel rod or other handy equipment (1.6 cm diameter, 61 cm long rounded at one end) and a balance. Sampling Concrete mix (M15) is blended according to the specified mix design in the laboratory.
Mar 28, 2020· This test is generally suitable to the concrete having low water cement ratio, Compaction factor apparatus' trowels, hand scoop (15.2 cm long), a rod of steel or other suitable material (1.6 cm diameter, 61 cm long rounded at one end ) and a balance, the compaction factor test is used for low workability justify, compaction factor test ...
Apr 30, 2016· Workability of concrete is defined as the ease and homogeneity with which a freshly mixed concrete or mortar can be mixed, placed, compacted and finished. Strictly, it is the amount of useful internal work necessary to produce compaction.
Compacting factor of fresh concrete is done to determine the workability of fresh concrete by compacting factor test as per IS: 1199 – 1959. The apparatus used is Compacting factor apparatus. Procedure to determine workability of fresh concrete by compacting factor test. i) The sample of concrete is placed in the upper hopper up to the brim.
In the process of mixing, transporting and placing of fresh concrete,air bubbles are likely to get entrapped in the concrete.The lower the work ability, the higher is number of air bubbles entrapped. Also Read: Workability of Fresh Concrete. Air bubbles occupy between 5 to 20 percent volume of the total concrete.If the air is not removed fully,it can reduce the bond between the concrete and ...
compaction achieved by a standard amount of work done by allowing the concrete to fall through a standard height. The degree of compaction, called the compacting factor is measured by the density ratio i.e., the ratio of the density actually achieved in the test to density of same concrete …
Tests conducted on Cement Concrete in Civil Engineering.refs: Compaction Factor Test for Concrete Workability - Method and ... Compaction Factor Test for Concrete Workability – Method and Procedure... Compaction Factor Test for Concrete Workabilit...
1. objective. The compacting factor test is designed primarily for use in the laboratory but it can also be used in the field. 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 …
Apr 09, 2015· Properties of Fresh Concrete Concrete remains in its fresh state from the time it is mixed until it sets. During this time the concrete is handled, transported, placed and compacted. Properties of concrete in its fresh state are very important because the influence the quality of the hardened concrete. The fresh concrete has the following […]
Jan 25, 2015· Concrete gain strength with time. With the passage of time bond between cement, sand and aggregates strengthen up. Following measures should be taken into consideration for fresh laying concrete. Curing. When it comes to protection of fresh concrete, Curing is the most important factor that must be considered in construction.
May 26, 2020· Introduction. The compacting factor test is conducted to determine the workability of fresh concrete. 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 …
Compaction Factor Test for Concrete Workability. Compaction factor test is the workability test for concrete conducted in laboratory. The compaction factor is the ratio of weights of partially compacted to fully compacted concrete. It was developed by Road Research Laboratory in United Kingdom and is used to determine the workability of concrete.
Mar 27, 2020· Compacting factor is defined as the ratio of weight of partially compacted concrete to the weight of fully compacted concrete. PROCEDURE: Four mixes are prepared with W/C., ratios 0.4, 0.5, 0.55, 0.6 and 0.65.
Concrete Placing; Concrete Compaction; Finishing with the homogeneity; It is necessary to measure workability of concrete before and during the concreting work because many factors affect the workability of fresh concrete like, weather conditions, type of work, types of ingredients which are used to make concrete etc. According to such factors ...
Compaction is a very important process that helps the fresh concrete reach its potential design strength. It ensures that the concrete fully surrounds and protects the reinforcement. However, as my luck would have it, the natural elements seemed to have damaged the reinforced elements such as beams, columns and walls of my house.
May 28, 2020· The compacting factor test is designed primarily for use in the laboratory but it can also be used in the field. 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 …
Compaction Factor Test – Workability of Concrete. 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. The compacting factor test has been developed at the Road Research Laboratory in United Kingdom.
Oct 17, 2012· Figureure 1: Variation of slump value of fresh concrete with quarry dust content 3.1.2 Compaction factor The variation of workability is measured in terms of compaction … Strength and durability properties of concrete containing quarry … highest slumps and compaction factor were recorded for the mixes designed by British method.
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.Its maximum answer is 1 but practically it is lesser than 1.
Nov 15, 2017· Now, the concrete inside the cylinder is fully compacted. Measure the weight of cylinder with fully compacted concrete and note it as W 3. Compaction factor test of Concrete Formula:-Important: The Compaction factor of concrete ranges from 0.7 to 0.95. This test is most suitable for concrete having a low water-cement ratio.
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. Apparatus: 1. Compaction Factor Machine, 2. Weighing Machine, 3. Steel Trowel Or Mechanical Vibrator.
Following tables shows the degree of concrete workability based on the results of slump tests and compacting factor tests. The range of results of each these tests indicates the suitable uses of concrete work. The slump and compacting factor test values shown below are of concretes with 20mm or 40mm maximum size of aggregates.
May 19, 2018· This video (Animation, Animated Video) explains the procedure for determination of workability by Compaction Factor Test. (Civil Engineering Animated Videos, Civil Engineering Videos) Social Media ...
Sep 13, 2016· 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: CF = wt. of partially compacted concrete/ wt. of fully compacted concrete Now what it signif...
In the compaction factor test, a given volume of concrete undergoes free fall from one hopper to the second, and then into a cylindrical container (see Figure 4). The compactability of the concrete is measured from the mass of the concrete inside the cylindrical container, without and with vibration (and subsequent filling).
Workability of concrete – Dr.N.Suresh Professor, The behavior of green or fresh concrete from mixing up to compaction depends mainly on the property called " workability of concrete ". Workability of concrete is a term which consists of the following four partial properties of concrete namely, Mixability, Transportability, Mouldability and Compactibility.
Fresh concrete is that stage of concrete in which concrete can be moulded and it is in plastic state. This is also called "Green Concrete". Another term used to describe the state of fresh concrete is consistence, which is the ease with which concrete will flow. Setting of Concrete The hardening of concrete before its […]
Nov 15, 2017· Compaction factor test of concrete:-The compacting factor test is performed to find out the workability of concrete. Slump test doesn't give accurate results for the low workability of concrete when the slump is <50mm. Here to dealt with Compaction factor test used for concrete mixes of very low workability.
COMPACTION FACTOR TEST AIM: To measure the workability of concrete by compaction factor test APPARATUS REQUIRED: Compaction factor test apparatus PROCEDURE 1. The sample of concrete to be tested is placed in the upper hopper up to the brim. The trap-door is opened so that the concrete falls into the lower hopper. 2.
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