All types of cement conforming to en 197 are suitable. Similar to conventional concrete, scc can also be affected. Self compacting concrete scc has been widely used in industrial structures throughout the world since it has the ability to flow and fill all sections of forms with little or no vibration as. Self compacting concrete is a flowing concrete mixture that is able to consolidate under its own weight.
Self compacting concrete is a recent development that shows potential for future applications. Because of the wellcontrolled conditions, the introduction of scc in the precast concrete industry was successful. Selfcompacting concrete scc selfcompacting concrete scc is a flowing concrete that does not require vibration and, indeed, should not be vibrated. This paper presents the findings of an experimental study on the application of a reinforced selfcompacting concrete jacketing technique in damaged reinforced concrete beams. Placing and curing selfcompacting concrete in hot climates carlos f. Self compacting concrete scc non segregating concrete. Six precast prestressed bridge girders were cast using four scc and two conventional concrete mixes. It is able to gush under its own load, completely filling form.
Highly fluid, agilia is the ultimate selfcompacting concrete. A concrete mix can only be classified as self compacting concrete if the requirements for all the following three workability properties are fulfilled. 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. Because of the wellcontrolled conditions, the introduction of scc in. This paper presents the findings of an experimental study on the application of a reinforced self compacting concrete jacketing technique in damaged reinforced concrete beams. Selfcompacting concrete scc is a mixture of flowing concrete which is able to compact or consolidate by its own weight. The volume of excess paste was determined by experiments. Concrete self compacting concrete certified concrete. Selfcompacting concrete is the highly flowable, nonsegregating concrete that can spread into place, fill formwork, and encapsulate even the most congested reinforcement by means of its own weight, with little or no vibration. 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. Selfcompacting concrete scc is a flowing concrete mixture that is able to consolidate under its own weight. Scc is a highly flowable, nonsegregating, special concrete type that can settle into formworks, and encapsulates, heavily reinforced, narrow and deep.
It can be questioned whether the flow behaviour in pipes of. It uses superplasticisers and stabilisers to significantly increase the ease and rate of flow. Based on current research and available knowledge about scc presented in this paper, the following trends are emerging. Explore self compacting concrete with free download of seminar report and ppt in pdf and doc format. Scc is modern innovation does not require vibration for placement and compaction. Selfcompacting concrete is a recent development that shows potential for future applications. Self compacting concrete is the highly flowable, nonsegregating concrete that can spread into place, fill formwork, and encapsulate even the most congested reinforcement by means of its own weight, with little or no vibration. O scc was first developed in japan around the year 1980. The range of benefits offered go beyond fundamental aspects of concrete quality and productivity. First, 6 beams were designed to be shear dominated, constructed.
Self compacting concrete concrete building technology. Selfcompacting concrete is characterized by the adoption of a concreting method that does not require vibration during placing. Properties of selfcompacting concrete with recycled. Most revolutionary development in concrete construction for several decades. Selfcompacting concrete used for underground diaphragm walls of worlds largest 200,000 kl inground tanks at inchon lng terminal in korea. Selfcompacting concrete scc for prestressed bridge girders. Mar 01, 2000 self compacting concrete was first developed 1988 in order to achieve durable concrete structures.
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. Okamura from the university of tokyo japan is mainly responsible for initiating the development of scc. Use of scc can also help minimize hearingrelated damages on the worksite that are induced by. This recommendation specifies the performance required of selfcompacting concrete, primarily the selfcompactability, and provide verification and inspection methods. 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. Selfcompacting concrete procedure for mix design paratibha aggarwal, rafat siddique, yogesh aggarwal, surinder m gupta figure 2. An increase in the flowability of concrete is known to increase the risk of segregation.
Firth scc has also been proven to have superior bond to top bar reinforcing compared to normal concrete. The selfcompacting concrete differs from conventional concrete in the following three characteristic features, namely, appropriate flowability, nonsegregation, and no blocking. Selfcompacting concrete procedure for mix design paratibha aggarwal, rafat siddique, yogesh aggarwal, surinder m gupta the properties of fly ash conform to is. 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 ingredients for self compacting concrete are similar to conventional concrete. The main difference between conventional vibrated concrete cvc and selfcompacting concrete scc is observed in the fresh state, as scc has a significantly lower yield stress. It consists of cement, coarse and fine aggregates, water, mineral and chemical admixtures.
Selection of the type of cement will depend on the overall requirements for the concrete, such as strength, durability etc. Jul 27, 2012 the main difference between conventional vibrated concrete cvc and self compacting concrete scc is observed in the fresh state, as scc has a significantly lower yield stress. The highly fluid nature of scc makes it suitable for placing in difficult conditions and in section with congested reinforcement. Selfcompacting concrete development must ensure a good balance between deformability and stability. Self compacting concrete scc is already common in the fabrication of precast concrete products. Selfcompacting concrete civil engineering community. Selfcompacting concrete scc concrete cement free 30. Selfcompacting concrete scc, also known as self consolidating concrete, is one of the most widely used concrete types, mainly because of its self compacting characteristics and strength. The european guidelines for self compacting concrete represent a stateoftheart document addressed to those specifiers, designers, purchasers, producers and users who wish to enhance their expertise and use of scc. Proc of 2nd int symp on selfcompacting concrete, tokyo, japan, october 2001, coms engineering, japan.
P,india is used as additives according to astm c 618 5. This success is based on the high quality of these products as well as the reached economic advantages. This short time lag is extremely unusual in the construction industry, given the complexity of its organisation 1. Since then, various investigations have been carried out and this type of concrete has been used in practical structures in japan, mainly by large construction companies. It is able to flow under its own weight due to its highly fluid nature and achieving a full compaction even in a formwork with complicated shapes and dense reinforcement.
First, 6 beams were designed to be shear dominated, constructed by commonly. The ingredients for selfcompacting concrete are similar to conventional concrete. Introduction self compacting concrete scc is a new category of high performance concrete characterized by its ability to spread into a heavily reinforced area under its own weight without the need of vibration and. 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. A distinctive feature of the short history of self compacting concrete has been a wide range of applications which have closely followed research and development studies. It does not require mechanical compaction and thus saves time, labour, equipment requirements and formwork damage. Properties of selfcompacting concrete an overview paratibha aggarwal, national institute of technology, kurukshetra, india yogesh aggarwal, national institute of technology, kurukshetra, india s m gupta national institute of technology, kurukshetra, india r siddique, thapar institute of engineering and technology, patiala, india 30th conference on our world. The utilisation of recycled concrete aggregate rca in selfcompacting concrete scc has the potential to reduce both the environmental impact and financial cost associated with this increasingly popular concrete type. Highly fluid, agilia is the ultimate self compacting concrete. Mar 16, 2016 o self compacting concrete is an innovative concrete that does not require vibration for placing and compaction. Table 1 compares a firth scc mix developed for auckland to normal 50 mpa concrete.
Substantial research was carried out with regard to the properties of scc. Application of a reinforced selfcompacting concrete jacket. The work presented in this paper seeks to build on the existing knowledge in this area by. Scheme of compacted aggregate and concrete mixtures. Innovative solutions for optimization of microstructure composition of selfcompacting concrete for performant realization of precast concrete. Self consolidating concrete or self compacting 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. Self compacting concrete seminar report, ppt, pdf for. 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 ultimate freeflowing, self compacting concrete. Application of a reinforced selfcompacting concrete. Lbox has arrangement and the dimensions as shown in figure 2. Methods of testing self compacting concrete workability. It is the ability of scc to flow into all spaces within the formwork under its own weight. Properties of selfcompacting concrete with recycled coarse. The european guidelines for selfcompacting concrete. Ozawa introduction self compacting concrete scc is an pioneering concrete that does not involve shuddering for insertion and compaction. Selfcompacting concrete scc is already common in the fabrication of precast concrete products. One such latest generation concrete is self compacting concrete scc. Self compacting concrete scc, also known asself consolidating concrete, is. Parameters influencing pressure during pumping of self. An experimental study on self compacting concrete hemanvitha bobba,u. However, to date limited research exists exploring the use of coarse rca in scc.
Keywords self compacting concrete, flowability, passing ability, resistance to segregation, fly ash, superplasticizer. Since then, various investigations have been carried out, and the concrete has been used in practical structures in japan, mainly by large construction companies. However, only a limited number of such investigations have been carried out using selfcompacting concrete scc for the core infill aslani, 20 aslani, 2014 aslani, 2015a aslani. Therefore, it is essential to have proper mix design. Selfcompacting concrete is a fluid mixture suitable for placing in structures with congested reinforcement without vibration. Development of ultra high performance self compacting concrete. Magnel laboratory for concrete research 62 durability in practice en 206 1. Development of scc self compacting concrete scc developed by professor hajime. The flow able fluid nature of selfcompacting concrete makes it a good choice for placing concrete in difficult or under cha.
Firth self compacting concrete scc is a concrete that flows into place under its own weight. It can be poured quickly, flowing and spreading effortlessly. Self compacting concrete an overview sciencedirect topics. It meets the demands placed by the requirements of speed and quality in concrete construction.
The concretes consistency is modified by using special additives. It achieves compaction into every part of the mould or formwork simply by means of its own weight. Ohtomo t, asaka s, kim jy, park cg, beak sj, jung cs, et al. The conditions of the self compacting concretes composition, according to the european guide for self compacting concrete efnarc, are the following.
Self compacting concrete scc it uses superplasticisers and stabilisers to significantly increase the ease and rate of flow. As per is4562000 6, cement is replaced by weight of material. To make scc interesting for other applications, in particular as a ready mix concrete, the higher material expenses in comparison to normal. Figure 5 shows the slump flow loss with elapsed time for self compacting concrete as affected by the superplasticiser dosage. Roadstone self compacting concrete scc is a highly fluid and flowable non segregating concrete that requires no mechanical vibration. On the other hand, the placement of scc by means of pumping is done with the same equipment and following the same practical guidelines developed for cvc. The invention of self compacting concrete scc is considered one of the most important developments in the construction industry. Concrete self compacting concrete certified concrete firth. Selfcompacting, or selfconsolidating concrete scc was first developed in japan in the early nineties. Self compacting concrete seminar report, ppt, pdf for civil. The work presented in this paper seeks to build on the existing knowledge.
Hence to overcome these defects the self compacting concrete is used. 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 contents abstract introduction chemistry behind workability mix design tests on fresh concrete field considerations applications advantages conclusion acknowledgements references. Selfcompacting concrete was first developed 1988 in order to achieve durable concrete structures. Admixtures a polycarboxylic ether based superplasticizer complying with astm c494 type f, was used. Concrete has to be heavily vibrated for flow into very intricate forms or forms that have a lot of reinforcing bars. Abstract self compacting concrete is a flowable concrete mixture with excellent strength and durability properties. These guidelines and are available for free download.
Self compacting concrete free download as powerpoint presentation. The utilisation of recycled concrete aggregate rca in self compacting concrete scc has the potential to reduce both the environmental impact and financial cost associated with this increasingly popular concrete type. Selfcompacting concrete scc v introduction to selfcompacting concrete. Materials for selfcompacting concrete the constructor. Characteristic compressive strength at 28 days 30mpa applicationsuse. Pdf on may 1, 20, ehsan ghafari and others published development of ultra high performance self compacting concrete find, read and cite all the research you need on researchgate. Workability of self compacting concrete on the basis of the above study two superplasticer dosages 0. Test results of 12 specimens subjected to monotonic loading up to failure or under repeated loading steps prior to total failure are included. 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.
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