However working on the parameters which affect the basic properties of self compacting concrete such as plastic viscosity, deformability, flowability and resistance to segregation, self compacting concrete may be proportioned. Selfcompacting concrete scc for prestressed bridge girders. Although scc is advantageous its processability in hot climate regions is not well understood and is the main topic of this investigation. The inplace cost savings, performance enhancements, or both, are the driving forces behind the use of selfconsolidating concrete.
Use of rice huskbark ash in producing selfcompacting. Scc is modern innovation does not require vibration for placement and compaction. Every filler has its on influence on the mix for self compacting concrete and must be investigated by different methods mortar rheology tests and mixing trials. The range of benefits offered go beyond fundamental aspects of concrete quality and productivity. Professor, reva institute of technology and management, bangalore 560064. Explore self compacting concrete with free download of seminar report and ppt in pdf and doc format. It is able to gush under its own load, completely filling form. Selfcompacting, or selfconsolidating concrete scc was first developed in japan in the early nineties. It is able to flow under its own weight, completely filling formwork and achieving full compaction, even in the presence of congested reinforcement. Research paper relation between workability and compressive. Four specimens were reinforced with normal steel bars reference specimens and the remaining 16 with steel tubes. As per is4562000 6, cement is replaced by weight of material. Founded in 1904 and headquartered in farmington hills, michigan, usa, the american concrete institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensusbased standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design. This standard covers the test method for slump flow of self compacting concrete with a maximum coarse aggregate size of 40 mm or less.
Placing and curing selfcompacting concrete in hot climates carlos f. There fore each selfcompacting concrete has to be designed for the particular structure to be constructed. Selfcompacting concrete scc is a highly flowable concrete which does not segregate and can spread into place, fill the formwork with heavily congested reinforcement without any mechanical vibration. Okamura from the university of tokyo japan is mainly responsible for initiating the development of scc. Modelling using factorial experimental plans, cement and concrete research, vol 34, pp 11991208, 2004.
Self compacting concrete is a type of concrete that is highly fluid allowing it to selflevel, penetrate into complicated areas and formwork, through complex reinforcement and much more. Selfcompacting concrete scc is a special kind of innovative concrete, which is exceedingly flowable and nonsegregating concrete, and can be easily placed and compacted under its own self weight need not requiring any mechanical vibration due to its good deformability nature and also as it acquire a property called capability of flowing. Experimental studies on m30 grade self compacting concrete. Hence to overcome these defects the self compacting concrete is used.
Self compacting concrete seminar report, ppt, pdf for civil. Self compacting concrete scc for prestressed bridge girders final report prepared by. 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. Fresh concrete selfcompacting concrete is characterized by flow ability, passing ability and. Ct was partially replaced with ground rice huskbark ash grhba at the dosage levels of 0%40% by weight of binder. Roadstone self compacting concrete scc is a highly fluid and flowable non segregating concrete that requires no mechanical vibration. Self compacting concrete scc, also known asself consolidating concrete, is. Self compacting concrete scc should present compatible quality and cost with conventional concrete cc. Because of the wellcontrolled conditions, the introduction of scc in the precast concrete industry was successful. P,india is used as additives according to astm c 618 5.
Despite its increased fluidity, self compacting concrete maintains the high quality demanded by todays building industry, presenting both flexibility as. This recommendation specifies the performance required of selfcompacting concrete, primarily the selfcompactability, and provide verification and inspection methods. Inspection manual for selfconsolidating concrete in. 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. Inspection manual for selfconsolidating concrete in precast members product 054p1 txdot project 054. Selfcompacting concrete scc is a special type of concrete which can be placed and consolidated under its own weight without any vibration effort due to its excellent deformability, and which at the same time is cohesive enough to.
It is able to flow and consolidate under its own weight, completely filling the formwork even in the presence of dense reinforcement. The work presented in this paper seeks to build on the existing knowledge in this area by. Study of sorptivity of selfcompacting concrete with. The self compacting concrete is a concrete which flows and settles due to its own weight without segregation and bleeding. It can flow easily in congested reinforced areas such as in beam column joints. No single method has been found until date, which characterizes all the relevant workability aspects, and hence, each mix has. Selfcompacting concrete is a recent development that shows potential for future applications. 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. A numerical model for selfcompacting concrete flow. In most previous studies on self compacting concrete, t400 is used to estimate the flow velocity of self compacting concrete. The concrete was cast along the entire lengths of the walls to avoid construction joints. Self compacting concrete is world widely abbreviated by an acronym scc. Incorporation of silica fume into concrete mixtures enhances all physical properties.
Properties of self compacting 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. Materials for selfcompacting concrete the constructor. Ozawa introduction self compacting concrete scc is an pioneering concrete that does not involve shuddering for insertion and compaction. Selfcompacting concrete procedure for mix design paratibha aggarwal, rafat siddique, yogesh aggarwal, surinder m gupta figure 2. According to aci 237r07, self consolidating concrete, properly proportioned and placed self consolidating concrete can result in both economic and technological benefits for the end user. One such latest generation concrete is self compacting concrete scc. Selection of the type of cement will depend on the overall requirements for the concrete, such as strength, durability etc.
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. Properties of selfcompacting concrete with recycled. Scc has several advantages over normal conventional concrete. May 14, 2014 this paper presents the use of blend of portland cement with rice huskbark ash in producing self compacting concrete scc. This study investigates the behavior of selfcompacting concrete scc specimens reinforced with smalldiameter steel tubes in lieu of reinforcing bars. Selfcompacting concrete scc for prestressed bridge girders final report prepared by. Mallesh m, associate professor, university bdt college of engineering, davangere, india. Behavior of selfcompacting concrete columns reinforced. In the present context the self compacting concrete can be proved as boon to construction industry. According to aci 237r07, selfconsolidating concrete, properly proportioned and placed selfconsolidating concrete can result in both economic and technological benefits for the end user.
Project report study on self compacting concrete using. Bulent erkmen carol shield catherine french department of civil engineering university of minnesota october 2008 published by. M sonebi, medium strength selfcompacting concrete containing fly ash. Selfconsolidating concrete for precast structural applications by eric p. Ozawa introduction selfcompacting concrete scc is an pioneering concrete that does not involve shuddering for insertion and compaction. There fore each self compacting concrete has to be designed for the particular structure to be constructed. Self compacting concrete seminar report, ppt, pdf for. Experimental investigation on selfcuring selfcompacting. Higher cement content andor lower watercement ratio leads to more effective results of selfcuring agents in concrete. One of the most outstanding advances in the concrete technology over the last decade is self compacting concrete scc. Founded in 1904 and headquartered in farmington hills, michigan, usa, the american concrete institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensusbased standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete. 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. 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. In all scc mixes compressive strengths of standard cube specimens were comparable to those of traditional vibrated concrete made with similar water cement ratios if anything strengths were higher.
We used similar compositions of scc and cc to study the fresh cement workability. Self compacting concrete scc is a flowing concrete mixture that is able to consolidate under its own weight. 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. Lbox has arrangement and the dimensions as shown in figure 2. Most revolutionary development in concrete construction for several decades. Selfcompacting concrete scc is an innovative concrete that does not require vibration for placing and compaction. Self compacting concrete an overview sciencedirect topics.
Fresh concrete self compacting concrete is characterized by flow ability, passing ability and. This standard covers the test method for slump flow of selfcompacting concrete with a maximum coarse aggregate size of 40 mm or less. 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. Mar 16, 2016 o self compacting concrete is an innovative concrete that does not require vibration for placing and compaction. Selfcompacting concrete scc is a highly fluid concrete that does not require any vibration during the placement process 1, 2. Development of scc self compacting concrete scc developed by professor hajime.
However working on the parameters which affect the basic properties of selfcompacting concrete such as plastic viscosity, deformability, flowability and resistance to segregation, selfcompacting concrete may be proportioned. However, no specification for t1 is given in efnarc or other codes. Selfcompacting concrete scc v introduction to selfcompacting concrete. Minnesota department of transportation research services section 395 john ireland boulevard, mail stop 330 st. Concrete is a mixture of cement, sand, gravel and water which dries hard and strong and is used as a material for building.
Concrete has to be heavily vibrated for flow into very intricate forms or forms that have a lot of reinforcing bars. In scc, the aggregates contribute 6070% of the total volume. Selfcompacting concrete is a highly flowable, stable concrete which flows readily into places around. Selfcompacting concrete is characterized by the adoption of a concreting method that does not require vibration during placing. Keywords self compacting concrete, flowability, passing ability, resistance to segregation, fly ash, superplasticizer. Compressive strength, porosity, chloride penetration, and corrosion of scc were determined. In most previous studies on selfcompacting concrete, t400 is used to estimate the flow velocity of selfcompacting concrete. It is able to flow under its own weight, completely filling formwork and achieving full compaction, even in the presence of. Self compacting concrete scc is a special type of concrete which can be placed and consolidated under its own weight without any vibration effort due to its excellent deformability, and which at the same time is cohesive enough to be handled without segregation or bleeding. Experimental investigation on selfcuring selfcompacting concrete by replacing natural sand by msand and coarse aggregates by light weight aggregate for m40 grade concrete mr. However, to date limited research exists exploring the use of coarse rca in scc. Properties of selfcompacting concrete with recycled coarse. Self compacting concrete is a recent development that shows potential for future applications. Scc is also otherwise called as highfluidity concrete, self leveling concrete and self consolidating concrete.
The inplace cost savings, performance enhancements, or both, are the driving forces behind the use of self consolidating concrete. Self compacting concrete scc non segregating concrete. Selfcompacting concrete scc is an innovative concrete that does not requires vibration for placing and compaction. Substantial research was carried out with regard to the properties of scc. Based on current research and available knowledge about scc presented in this paper, the following trends are emerging. Self compacting concrete and admixtures aggregate research. The highly fluid nature of scc makes it suitable for placing in difficult conditions and in sections with congested reinforcement. The grading curve for the filler can be finer graded for house building concrete with fewer. M sonebi, medium strength self compacting concrete containing fly ash. Use of rice huskbark ash in producing selfcompacting concrete. All types of cement conforming to en 197 are suitable. 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. 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. Many different methods have been developed to characterize the properties of scc.
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