Estimating concrete workability based on slump test with. The electronic files of the construction standard including amendment, if any, can be found on the. 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. This european standard specifies a method for determining the consistence of fresh concrete by the slump test. Fourinch 4 slump is very common with normal weight concrete and is a good average slump for pumping. Sep 16, 2014 here are the steps to do the slump test of concrete. Evaluation of the 90 minute rule as an acceptance criteria. If the slump test is to determine whether or not the concrete is to be accepted, the sample must be taken from the early part of the load. Understand the importance of, and how to set realistic quality objectives. Pdf report of rilem technical committee tc145 wsm workability of special. If the slump test result is outside of the slump range, correct before placing th e concrete in the work. Carry out the slump test at a place free from vibration or shock and within a period of 2.
Sampling, mixing and curing of fresh concrete sampling of fresh concrete astm c17290. The slump test is sensitive to changes in the consistence of concrete, which correspond to slumps between 10 mm and 210 mm. This test can be used as a control test and gives an indication of the concrete uniformity from batch to batch. Concrete slump test for workability procedure and results. Workability is most often assessed through the slump test aashto t 119, with a desired range in slump for eot concrete often specified between 50 and 150 mm 2. Collect a sample of concrete to perform the slum test. Concrete history named after quarry stone from the isle of. A typical minimum service life for normal concrete is at least 50 years. Department of civil engineering, chiang mai university fresh concrete ce 215 structural materials and testing. Procedure to determine workability of fresh concrete by slump test.
Utc0406a slump cone funnel, made of seemless spun steel, should be ordered separately. Consistency is the ability of freshly mixed concrete to flow. Categories building construction tags building construction, concreting method, construction work on site, factors affecting workability of concrete, methods of concrete compaction, slump test for concrete, tests for concrete, tests for fresh concrete 8 comments post navigation. Description download bs en 123502 2009 testing fresh concrete. Roll the drum for a certain time to completely mix the concrete inside. Cement and concrete terminology, aci 116r00, aci manual. But it is not suitable for very wet or very dry concrete. What are the difference between tender and contract documents. Veebee consistometer i veebee consistometer procedure i a conventional slump test is performed, placing the slump cone inside the cylindrical part of the consistometer. Nemati winter quarter 2015 5 cm 425 concrete technology 9 slump test cm 425 concrete technology 10 properties of fresh concrete the most important properties of fresh concrete are thus associated with its workability and consistency. It is the concrete phase from time of mixing to end of time concrete surface finished in its final location in the structure concrete operations. Concrete slump test procedure applications, types, uses. Oct 03, 2017 astm c231 standard test method for air content of freshly mixed concrete by the pressure method duration. Nd t 23 making and curing concrete test specimens in the field.
Slump test is an empirical test that measures workability of fresh concrete, it is performed to check consistency of freshly made concrete. The slump operation shall be completed in a maximum elapsed time of 2 12 minutes. This document specifies a method for determining the consistence of fresh concrete by the slump test. Concrete workability, high performance concrete, slump, compacting factor, vebe time. Concrete slump test to determine the workability of concrete mix. The slump test is carried out on fresh concrete to determine its workability, which is the ease of placing, consolidating, and finishing freshly mixed concrete. Slump test and compacting factor test of fresh concrete. More specifically, it measures concrete consistency between batches. The concrete slump test is used for the measurement of a property of fresh concrete.
Is not only dependent upon durability concrete strength. Various tests for workability of concrete at construction sites i. It is performed to check the workability of freshly made. Concrete slump test is carried out to check the uniform quality during construction. Correlating slump, slump flow, vebe and flow tests to rheological. Slump test is used to determine the workability of fresh concrete. Start slump, temperature, and air content tests within 5 minutes after obtaining the sample of fresh concrete. Thus, concrete workability is a very crucial factor that must be considered in order to produce high quality concrete 24. Properties of fresh concrete university of washington. The test is an empirical test that measures the workability of fresh concrete.
Most concrete must be compacted after it has been placed in the. It is performed to check the workability of freshly made concrete, and therefore the ease with which concrete flows. Tests on concrete workability tests slump cone test, compaction factor test. Lab manual of concrete technology sanjay ghodawat group of. Acceptance test ing includes tests on plastic concrete for slump, air content, density unit weight, temperature, and tests on hardened concrete for strength and other durability properties as required in contract documents or project specifications. Nd t 121 density unit weight, yield, and air content gravimetric of concrete. If the slump and air content meet requirements, complete the discharge. The slump test as 1012, part 3 determining the consistency of concrete. The measured slump must be within a set range, or tolerance, from the target slump. Concrete slump test is carried out from batch to batch to check the uniform quality of concrete during construction. Standard test method for slump of hydrauliccement concrete.
Test specimen shall be a representative sample based on. 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. Even with the increase in knowledge of concrete rheology, the slump test remains the predominately used test method for measuring concrete workability. The slump test is a means of assessing the consistency of fresh concrete. Using this test, the slump can be derived by measuring the drop from the top of. Never take the sample from the first concrete out of the mixer. The test is carried out in accordance with bs en 123502, testing fresh concrete. The slump test is sensitive to changes in the consistence of concrete, which correspond to slumps between 10 mm and 200 mm. Slump is a measure of concrete consistency or fluidity. 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. Stand firmly on the footpieces and fill the volume of the cone with the sample. The test is popular due to the simplicity of apparatus used and simple procedure. This test requires filling a truncated cone with concrete, removing the cone and measuring the distance the concrete slumps. Concrete slump test procedure applications, types, uses and.
Beyond these extremes the measurement of slump can be unsuitable and other methods of determining the consistence should be considered. Start slump, temperature, and air content tests with in 5 minutes after obtaining the sample of fresh concrete. They comprise batching, mixing, transporting, placing, compacting, surface finishing. Drm is included at the request of the publisher, as it helps them protect their by restricting file sharing. 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. Acceptance testing includes tests on plastic concrete for slump, air content, density unit weight, temperature, and tests on hardened concrete for strength and other durability properties as required in contract documents or project specifications. The concrete slump test is an onthespot test to determine the consistency as well as workability of fresh concrete. Correlating slump, slump flow, vebe and flow tests to. The slump plate should be clean, firm, level and nonabsorbent.
Here are the steps to do the slump test of concrete. The test devices described in the patent documents listed in table 6 typically only measure. Tests on concrete concrete slump test, compression test for. 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. Since fibers impart considerable stability to a fresh concrete mass, the slump cone is not considered as a good index of workability. In a true slump the concrete simply subsides, keeping more or less to shape.
It can also be used as an indicator of an improperly mixed batch. Department of civil engineering, chiang mai university fresh concrete. The slump test is the most common method for assessing the flow properties of fresh concrete. 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. Secure pdf files include digital rights management drm software. The test devices described in the patent documents listed in table 6 typically only. Concrete slump test the concrete slump test measures the consistency of fresh concrete before it sets. Beyond these extremes the measurement of slump can be unsuitable and other methods of determining the.
Additional information on workability and quality of concrete. Astm c231 standard test method for air content of freshly mixed concrete by the pressure method duration. It is the concrete phase from time of mixing to end of time concrete surface. Wet sieving stability test gtm screen stability 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 concrete slump test measures the consistency of fresh concrete before it sets. It is used, indirectly, as a means of checking that the correct amount of water has been added to the mix. Clean away the mortar or water leaked out between the mould and the base plate. Tests for workability of concrete at construction site and. Tests for fresh concrete building construction civil. Job task analysis jta for aci concrete quality technical manager certification continued page 4 of 7 approved 652014 aci 212.
To determine the workability of fresh concrete by using a veebee consistometer as per is. Workability is most often assessed through the slump test aashto t 119, with a desired range in slump for eot concrete often specified between 50 and 150 mm 2 to 6 in. Sep 22, 2010 categories building construction tags building construction, concreting method, construction work on site, factors affecting workability of concrete, methods of concrete compaction, slump test for concrete, tests for concrete, tests for fresh concrete 8 comments post navigation. Then curing of inplaced concrete starts 610 hours after casting. 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. Consistency is a general term to indicate the degree of fluidity or the degree of mobility. The apparatus used for doing slump test are slump cone and tamping rod. Although freshly mixed concrete remains plastic only a short time, its properties. Concrete workability, high performance concrete, slump, compacting factor, vebe.
With the exception of the widely used slump test, the few methods that have been studied extensively have generally failed to gain widespread acceptance. Slump test simplest and crudest test fill concrete into frustum of a steel cone in three layers. The test was used to perform rheological tests on zeroslump concrete since all parts of. For determining the consistency and workability of concrete. Each entry for a test method is presented in a standard format, namely. The slump test method is used for the determination of the consistency and workability of fresh concrete. Tests for workability of concrete at construction site and recommended values various tests for workability of concrete at construction sites i.
Slump test is the most commonly used method of measuring consistency of. Do not obtain portions from the very first or last portions the first and the last 15% of the volume. Fresh concrete testing pic i fresh concrete testing pic ii expected research outcome quantify the loss in performance, if any, beyond the 90 minute specified limit for concrete mixes without hydration stabilizer retarder. Job task analysis jta for aci concrete quality technical. This delay in placing concrete is extremely important when the test is on the first load of concrete of the day. This test method was originally developed to provide a technique to monitor the consistency of unhardened concrete. Repeat the whole procedure using a fresh 10 g sample to obtain r2. For given proportions of cement and aggregates without admixtures, the higher the slump, the wetter the mix. Job task analysis jta for aci concrete quality technical manager certification continued page 2 of 7 approved 652014 know the key elements of, and how to develop a quality policy. Air entrainment before and after redosing admixtures. Start strength tests within 15 minutes of obtaining the sample.
Slump test is an empirical test that measures workability of fresh ppt presentation summary. To determine the workability of fresh concrete of given proportions by slump test and compacting factor test. Slump test simplest and crudest test fill concrete into frustum of a steel cone in three layers hand tap concrete in each layer movement of the concrete lift cone up. Ifif meticulousmeticulous carecare isis notnot exercised,exercised, andand goodgood.
This test plays a vital role in ensuring immediate concrete quality in a construction project. Process of manufacture of concreteprocess of manufacture of concrete itit isis interestinginteresting toto notenote thatthat thethe ingredientsingredients ofof goodgood concreteconcrete andand badbad concreteconcrete areare thethe same. It is not a suitable method for very wet or very dry concrete. If a shear or collapse slump is achieved, a fresh sample should be taken and the test is. Aashto t119 test for slump of hydrauliccement concrete.
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. Test parameters per applicable standards, the following tests were performed on concrete batches at these time lapses. In a shear slump the top portion of the concrete shears off and slips sideways. Mahmoud aliraqi mansoura university, egypt slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising.
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