Nself compacting concrete test pdf

Procedure for u box test on self compacting concrete. In the test comparison is made between ordinary cement concrete occ and self compacting concrete scc by taking the same size of beam 10x10x50cm. Based on current research and available knowledge about scc presented in this paper, the following trends are emerging. Introduction selfcompacting concrete scc is a special kind of innovative concrete, which is exceedingly flowable and nonsegregating concrete, and can be easily placed and. Okamura from the university of tokyo japan is mainly responsible for initiating the development of scc. Compactibility of fresh concrete using the funnel test. Roadstone self compacting concrete scc is a highly fluid and flowable non segregating concrete that requires no mechanical vibration. Pdf self compacting concrete with tests researchgate. It consists of cement, coarse and fine aggregates, water, mineral and chemical admixtures. Optimum mix proportioning of high strength self compacting.

Here, the grading and packing of all solids in the concrete mix serves as a basis for the development of new concrete mixes. This is taken as the aggregate correction factor, g. Selfconsolidating concrete or selfcompacting concrete commonly abbreviated to scc is a concrete mix which has a low yield stress, high deformability, good segregation resistance prevents separation of particles in the mix, and moderate viscosity necessary to ensure uniform suspension of solid particles during transportation, placement without external compaction, and thereafter until. Selfcompacting concrete procedure for mix design from. The concretes consistency is modified by using special additives. To check whether or not the concrete is selfcompactable for the. Explore self compacting concrete with free download of seminar report and ppt in pdf and doc format. Selfcompacting concrete scc for prestressed bridge girders. Concrete library of jsce, vol 25, june 1995, pp 5975. Properties of selfcompacting concrete with different types of additives 175 lbox test is used to assess the passing ability of scc to flow through tight openings including spaces between reinforcing bars and other obstructions without segregation or blocking. The paper presents an experimental procedure for the design of selfcompacting concrete mixes. This standard covers the test method for slump flow of selfcompacting concrete with a maximum coarse aggregate size of 40 mm or less.

The range of benefits offered go beyond fundamental aspects of concrete quality and productivity. Since then, various investigations have been carried out, and the concrete has been used in practical structures in japan, mainly by large construction companies. Highly fluid, agilia is the ultimate selfcompacting concrete. Standard test methods for selfcompacting concrete contents l.

Figure 5 shows the slump flow loss with elapsed time for selfcompacting concrete as affected by. Self compacting concrete is widely used from small to a big scale project. The measured, predicted, and calculated prestress losses were generally in good agreement. Firth self compacting concrete scc is a concrete that flows into place under its own weight. It meets the demands placed by the requirements of speed and quality in concrete construction. The test procedure for lbox test is described in en 1235010. The testprogram was divided in three series i, ii and iii. The concrete was cast along the entire lengths of the walls to avoid construction joints. Concrete self compacting concrete certified concrete. It achieves compaction into every part of the mould or formwork simply by means of its own weight without any segregation of the coarse aggregate. Existing rheological test procedure have not considered here, though. Testing and mix design method of self compacting concrete bvm. Placing and curing selfcompacting concrete in hot climates carlos f. About 20 liter of concrete is needed to perform the test, sampled normally.

Firth scc has also been proven to have superior bond to top bar reinforcing compared to normal concrete. As per is4562000 6, cement is replaced by weight of material. A self compacting concrete has the properties such as filling ability, passing ability and segregation resistance. Set the apparatus level on firm ground, ensure that the sliding gate can open freely and then close it.

Selfcompacting concrete scc is a flowing concrete that does not require vibration and, indeed, should not be vibrated. Further development of latest generation concretes in the recent past needs to update knowledge on the behaviour of such concrete with the addition of fibres to make them more efficient and effective. The concrete is poured to the top of the cleaned funnel whithout any agitation. Selfcompacting concrete procedure for mix design article pdf available in leonardo electronic journal of practices and technologies 712 june 2008 with 35,725 reads how we measure reads. To identify test methods for scc to improve its workability. Introduction selfcompacting concrete scc, which flows under its own weight and does not require any external vibration for compaction, has revolutionized concrete placement. U box test on self compacting concrete for filling ability. Methods of testing self compacting concrete workability. Selfcompacting concrete, also referred to as selfconsolidating concrete can flow and consolidate under its own self weight and deaerated almost. Abstract self compacting concrete is a highly flowable, yet stable concrete that.

Scheme of compacted aggregate and concrete mixtures. Learning and guiding workers to implement the self compacting concrete. The test results for acceptance characteristics of selfcompacting concrete such as slump flow. Selfcompacting concrete scc v introduction to selfcompacting concrete. Testing and mix design method of self compacting concrete. Selfcompacting concrete civil engineering community. Specification and guidelines for selfcompacting concrete efnarc. The conditions of the self compacting concretes composition, according to the european guide for self compacting concrete efnarc, are the following. Self compacting concrete basics and how to do flow table test no a days due to increase in demand of housing and shortage of space and also the demand of architect to make structure thin. Selfcompacting concrete scc is one of the most significant recent advances in concrete technology. Principle behind self compacting concrete lets go to soil mechanics. The test results indicated that the overall performance of the scc girders was comparable to that of the conventional concrete girders.

Index terms self compacting concrete, nansu coefficient, watercement ratio, fly ash, auromix400 super plasticizer, compressive strength. Lbox has arrangement and the dimensions as shown in figure 2. Selfcompacting concrete scc is already common in the fabrication of precast concrete products. The volume of excess paste was determined by experiments. Selfcompacting concrete was first developed 1988 in order to achieve durable concrete structures. It uses super plasticisers and stabilizers to significantly increase the ease and rate of flow. Some literature reported that jring test for passing ability of selfcompacting concrete is the difference between slump flow and jring flow diameter, which should normally be within 2 inches. The tests methods presented here are devised specifically for self compacting concrete. Test specimens of self compacting concrete scc and ordinary cement concrete beam.

Table 1 compares a firth scc mix developed for auckland to normal 50 mpa concrete. Self compacting concrete basics and how to do flow table. Concrete is a mixture of cement, sand, gravel and water which dries hard and strong and is used as a material for building. Pdf selfcompacting concrete procedure for mix design. Self compacting concrete hardened properties testing of firth scc in new zealand has proven it to be equal or superior to normal concrete in hardened properties. The european guidelines for self compacting concrete 1 introduction selfcompacting concrete scc is an innovative concrete that does not require vibration for placing and compaction. Cip 37 self consolidating concrete scc self consolidating concrete scc, also known as self compacting concrete, is a highly flowable, nonsegregating concrete that can spread into place, fill the formwork and encapsulate the reinforcement without any mechanical consolidation. The ingredients for selfcompacting concrete are similar to conventional concrete. Further, compressive strength at the ages of 7, 28, and 90 days was also determined and results are included here. This is a simple, rapid test procedure, though two people are needed if the t50 time is to.

First, the features of japanese and chinese methods are discussed, in which the packing of sand and gravel plays a major role. P,india is used as additives according to astm c 618 5. Ideal for difficult concrete pours or areas with a high density of reinforcing steel, the excellent flowing characteristics of scc make the most complex and challenging project easily achieved. The utilisation of selfcompacting concrete scc is growing rapidly. There are three purposes for selfcompactability tests relating to practical purposes. Selfcompacting concrete is a recent development that shows potential for future applications.

It is able to flow under its own weight, completely filling formwork and achieving full compaction, even in the presence of congested reinforcement. Selfcompacting concrete journal of advanced concrete. Our role maximum application of self compacting concrete. Experimental studies on m30 grade self compacting concrete. This paper addresses experiments and theories on selfcompacting concrete. Selfcompacting concrete scc it uses superplasticisers and stabilisers to significantly increase the ease and rate of flow. Also explore the seminar topics paper on self compacting concrete with abstract or synopsis, documentation on advantages and disadvantages, base paper presentation slides for ieee final year civil engineering ce or ieee civil construction btech, be, mtech students for the year 2015 2016. Self compacting concrete scc developed by professor hajime okamuraof kochi university of technology, japan, in1986 during his research, okamura found that the main cause of the poor durability performances of japanese concrete in structures was the inadequate compacting of the concrete in the casting operations. Test methods for self compacting concretefilling ability of. Workability of selfcompacting concrete on the basis of the above study two superplasticer dosages 0. The flowability of scc is measured in terms of spread when. Self compacting concrete seminar report, ppt, pdf for.