Using new admixtures and some mix modifications, we can now produce concrete that flows easily without segregating where the coarse aggregate separates from the cement paste. Such concrete should have a relatively low yield value to ensure high flow. Different methods of concrete compaction there are two methods. 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. Introduction selfcompacting concrete scc is considered as a concrete which can be placed and compacted under its self weight with little or no vibration effort, and which is at the same time cohesive enough to be handled without segregation or bleeding. Firth scc has also been proven to have superior bond to top bar reinforcing compared to normal 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. Troli enco, engineering concrete, ponzano veneto tv, italy abstract. Self compacting concrete was obtained by partially replacing portland cement with a previously prepared rice husk ash preliminary preparation included the thermal treatment of the ash under. Roadstone self compacting concrete scc is a highly fluid and flowable non segregating concrete that requires no mechanical vibration. Concrete is a mixture of cement, sand, gravel and water which dries hard and strong and is used as a material for building. With a reduced impact on the working environment due to lack of vibration and the ability to fill more complex and heavily reinforced form sections than with conventional concrete due to self flowing capabilities, scc is the next step in concrete evolution.
The first usable version of selfcompacting concrete was completed in 1988 and was named high performance concrete, and later proposed. Self compacting concrete, born in japan in late 80s to solve problems of pouring and setting concrete in high rebar densities structures, has slowly spread all. One such latest generation concrete is self compacting concrete scc. Page 5 of 7 compaction of concrete surface vibrators surface vibrators are applied to the top surface of concrete and act downwards from there. Self levelling concrete self compacting concrete cemex uk. This application of nanotechnology in construction provides benefits from the perspective of materials technology and environmental protection and is presenting diverse opportunities to engineers and architects alike. Self compacting concrete was first developed 1988 in order to achieve durable concrete structures. One of the most remarkable projects built using selfcompacting concrete is the akashikaikyo suspension bridge. The european guidelines for selfcompacting concrete. Self compacting concrete seminar report, ppt, pdf for civil. Methods of testing self compacting concrete workability. Selfcompacting concrete was first developed 1988 in order to achieve durable concrete structures. Pdf selfcompacting concrete scc it is considered to be one of the most successful innovation in industry of construction. Selfcompacting concrete procedure for mix design paratibha aggarwal, rafat siddique, yogesh aggarwal, surinder m gupta concrete that can flow under its own weight through restricted sections without segregation and bleeding.
Selfcompacting concrete has been used in bridges and even on precast sections. This is a special type of concrete which compacts under its own weight without an need of vibration. Self compacting concrete scc can be defined as fresh concrete that flows under its own weight and does not require external vibration to undergo compaction. Rating is available when the video has been rented.
Filling and passing ability, segregation resistance are the properties of self compacting. Scc is viewed as a major breakthrough in construction. Since then, various investigations have been carried out, and the concrete has been used in practical structures in japan, mainly by large construction companies. The compacting and finishing of concrete are generally two separate operations but sometimes, particularly with flat horizontal surfaces, they become parts of the one operation. 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.
Selfcompacting concrete, fiber reinforcement, fly ash, workability, strength 1. Six precast prestressed bridge girders were cast using four scc and two conventional concrete mixes. Selfcompacting concrete scc selfcompacting concrete scc is a flowing concrete that does not require vibration and, indeed, should not be vibrated. Scc is employed in the construction of raft and pile foundations. Selfcompacting concrete scc for prestressed bridge girders. During the last decade, concrete technology has made an enormous advance through the introduction of self compacting concrete. In this project, the scc was mixed onsite and pumped through a piping system to the specified point, located 200 meters away. Self compacting concrete an overview sciencedirect topics. Self compacted concrete is highly engineered concrete with much higher fluidity without segregation and is capable of filling every corner of formwork under its self weight. Selfcompacting concrete applications and advantages. It does not require mechanical compaction and thus saves time, labour, equipment requirements and formwork damage. To make scc interesting for other applications, in particular as a ready mix concrete, the higher material expenses in comparison to normal. Self compacting concrete free download as powerpoint presentation. Okamura from the university of tokyo japan is mainly responsible for initiating the development of scc.
The parameters used in this study are dosage level of highperformance superplasticiser glenium. 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 composite material concrete. In general, scc is concrete made with conventional concrete materials and, in some cases, with a viscositymodifying admixture vma. 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. Scribd is the worlds largest social reading and publishing site.
Concrete basicsaims to provide a clear, concise explanation of all aspects of making quality concrete. Mar 16, 2016 o self compacting concrete is an innovative concrete that does not require vibration for placing and compaction. Concrete that segregates loses strength and results in. In the situation where, in the project, are not mentioned the self compacting concrete s characteristics, the consistency classes must be selected carefully, on the basis of the site conditions, by all factors involved in designer, builder, concrete station. One of the most remarkable projects built using self compacting concrete is the akashikaikyo suspension bridge. Selfcompacting concrete scc is a key innovation in concrete technology and it is truly remarkable that, even after almost 30 years since its first implementation, it. Selfcompacting concrete is a recent development that shows potential for future applications. Compaction is a process of expelling the entrapped air. The science of concrete agilias product formulas are a culmination of the latest discoveries in organic chemistry. This paper is to reports the results of an investigation into the properties of flowing and selfcompacting concretes. Investigations for establishing a rational mix design method and self compactability testing methods have been carried out from the. A concrete of next decade 1n r gaywala 2 d b raijiwala address for correspondence 1 student of m.
Self compacting concrete incorporating highvolumes of class. Pdf selfcompacting concrete was first developed in 1988 to. The paper presents the characteristics of the selfcompacting concretes, their advantages and disadvantages when they are used in buildings. Self consolidating concrete scc is recognized as one of the greatest advances in the concrete industry. This video animation, animated video explains the concept of self consolidated concrete self compacting concrete.
Selfcompacting concrete is gradually becoming the preferred formulation worldwide for many applications such as foundations, floors, walls and complex bespoke structures because it combines great strength and superb finishes with the opportunity to make serious project productivity improvements. It is the ability of scc to flow into all spaces within the formwork under its own weight. Tech research, department of applied mechanics, s v national institute of technology, surat 395007. Firth self compacting concrete scc is a concrete that flows into place under its own weight. The seminar report on selfcompacting concrete which explains the mix design, advantages and disadvantages, applications, properties,process of making selfconsolidating concrete, theoretical and experimental studies with test results. Concrete basicsaddresses the needs of unskilled and semiskilled persons undertaking general concreting projects including home and handyman projects. Mechanical properties of selfcompacting concrete stateofthe. Workability of self compacting concrete on the basis of the above study two superplasticer dosages 0.
Self consolidating concrete scc is highly flowable, nonsegregating concrete that can spread into place, fill the formwork, and encapsulate the reinforcement without any mechanical consolidation. Predicting the ingredients of self compacting concrete using artificial. Selfcompacting concrete scc is a highly flowable, yet stable concrete that can spread readily into place and fill the formwork without any consolidation and without undergoing significant separation. A measure of the ease by which fresh concrete can be placed and compacted.
Development of scc 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. Types of materials required and their properties for self compacting concrete is discussed. Self compacting concrete has been used in bridges and even on precast sections. Self compacting concrete seminar report, ppt, pdf for. It uses superplasticisers and stabilisers to significantly increase the ease and rate of flow. Concrete has to be heavily vibrated for flow into very intricate forms or forms that have a lot of reinforcing bars. Self compacting concrete or scc is the concrete material for the future. Selfcompacting concrete scc it uses superplasticisers and stabilisers to significantly increase the ease and rate of flow. Self compacting concrete scc non segregating concrete. It can be used in precast applications or for concrete placed on site. A flowing concrete and two self compacting concretes were manufactured, at given portland cement content 400 kgm3 and watercement ratio 0. They are very useful for compacting slabs, industrial floors, road pavements, and similar flat surfaces.
Self compacting concrete materials, properties and tests. There fore each selfcompacting concrete has to be designed for the particular structure to be constructed. This concrete is defined as follows at the three stages of concrete. Abstractselfcompacting concretescc possesses enhanced qualities and improves productivity and working conditions due to elimination of compaction. O scc was first developed in japan around the year 1980. Self compacting concrete incorporating highvolumes of. Self compacting stevenson concretestevenson concrete. 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. Self compacting has material requirements same as conventional concrete, but it requires admixtures to enhance the workability.
Selfcompacting concrete scc is already common in the fabrication of precast concrete products. Lachemib a research scientist international centre for sustainable development of cement and. It is used in the construction where it is hard to use vibrators for consolidation of concrete. It achieves compaction into every part of the mould or formwork simply by means of its own weight. Table 1 compares a firth scc mix developed for auckland to normal 50 mpa concrete. Pdf selfcompacting concrete procedure for mix design. Compaction is the process that expels entrapped air from freshly placed concrete and packs the aggregate particles together so as to increase the density of the concrete.
Selfcompacting concrete offers a rapid rate of concrete placement, with faster construction. Hence to overcome these defects the self compacting concrete is used. Selfcompacting concrete scc v introduction to selfcompacting concrete. Selfcompacting highperformance concrete is a high performance concrete that can be compacted into every corner of a formwork, purely by means of its own weight and without the need for vibrating compaction fig. Pdf self compacting concrete an inovative concrete researchgate. Classes of self compacting concrete delivered by holcim romania. 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. Performance of glass fibre reinforced self compacting. It has been found from the experimental studies that 1% air in the concrete approximately reduces the strength by 6%. The concretes consistency is modified by using special additives. It meets the demands placed by the requirements of speed and quality in concrete construction. By the early 1990s, japan has developed and used scc. What is self consolidated concrete self compacting. 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.
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. 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. Skarendahl and peter billberg rilem publications s. Glass fibre reinforced self compacting concrete gfrscc is composed of cement, different sizes of coarse and fine aggregates, which integrate with distinct, uneven glass fibre. 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 be handled without segregation or bleeding. Explore self compacting concrete with free download of seminar report and ppt in pdf and doc format. 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. There fore each self compacting concrete has to be designed for the particular structure to be constructed. Properties of selfcompacting concrete with different. 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. Self compacting concrete scc is already common in the fabrication of precast concrete products.
Casting of self compacting concrete final report of rilem technical committee 188csc. Self consolidating concrete overview of scc the concrete. They also aid in levelling and finishing the surface. Pdf selfcompacting concrete is a fluid mixture suitable for placing in structures with congested reinforcement without vibration. This success is based on the high quality of these products as well as the reached economic advantages. A concrete mix can only be classified as self compacting concrete if the requirements for all the following three workability properties are fulfilled. Jul 09, 2018 self compacting concrete scc is a flowing concrete that does not require vibration and, indeed, should not be vibrated. It uses super plasticisers and stabilizers to significantly increase the ease and rate of flow. Self consolidating concrete fills every nook and corner of the formwork without any segregation while maintaining homogeneity.
Selfcompacting concrete, slumflow test,vfunnel fly ash. Evaluation of fresh and hardened properties of self. Based on current research and available knowledge about scc presented in this paper, the following trends are emerging. Self compacting concrete is a recent development that shows potential for future applications. Together, this dynamic fusion delivers the ultimate freeflowing, selfcompacting concrete. Concrete self compacting concrete certified concrete. It is able to flow under its own weight, completely filling formwork and achieving full compaction, even in the presence of congested reinforcement. Self compacting concrete scc is a key innovation in concrete technology and it is truly remarkable that, even after almost 30 years since its first implementation, it still attracts the interest.
Self compacting concrete incorporating highvolumes of class f fly ash. The conditions of the self compacting concretes composition, according to the european guide for self compacting concrete efnarc, are the following. Lbox has arrangement and the dimensions as shown in figure 2. The present paper explores the recent innovations in self compacting concrete containing agroindustrial waste materials. Concrete self compacting concrete certified concrete firth. Figure 5 shows the slump flow loss with elapsed time for self compacting concrete as affected by the superplasticiser dosage. Selfcompacting concrete scc is a flowing concrete that does not require vibration and, indeed, should not be vibrated. Pdf selfcompacting concrete using pretreatmented rice. If we dont expel this air, it will result into honeycombing and reduced strength. Materials for selfcompacting concrete the constructor. Also self compacting concrete has a brittle characteristic even with other kinds of cementitious materials. The concrete was cast along the entire lengths of the walls to avoid construction joints. Launched in japan in late 1980s, it has been widely accepted since then and is now used around. Civil engineering animated videos, civil engineering videos social media.