Development of high performance concrete based on durability design of concrete structures. 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. 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. It achieves compaction into every part of the mould or formwork simply by means of its own weight. We used similar compositions of scc and cc to study the fresh cement workability. The ingredients for selfcompacting concrete are similar to conventional concrete. An experimental study on self compacting concrete hemanvitha bobba,u. The work presented in this paper seeks to build on the existing knowledge in this area by. Faculty, sahand university of technology, tabriz, iran 2m. Self compacting concrete scc for prestressed bridge girders final report prepared by. Table 1 compares a firth scc mix developed for auckland to normal 50 mpa concrete. Explore self compacting concrete with free download of seminar report and ppt in pdf and doc format. Self compacting concrete scc advantages and disadvantages self compacting 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. Selfcompacting concrete is a recent development that shows potential for future applications. The center for advanced cement based materials white. Selfcompacting concrete scc selfcompacting concrete scc is a flowing concrete that does not require vibration and, indeed, should not be vibrated. Pdf selfcompacting concrete procedure for mix design. Abstract self compacting concrete is a flowable concrete mixture with excellent strength and durability properties. This standard covers the test method for slump flow of self compacting concrete with a maximum coarse aggregate size of 40 mm or less. However, to date limited research exists exploring the use of coarse rca in scc. 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. Concrete self compacting concrete certified concrete. 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. Placing and curing selfcompacting concrete in hot climates carlos f. Bulent erkmen carol shield catherine french department of civil engineering university of minnesota october 2008 published by. It uses superplasticisers and stabilisers to significantly increase the ease and rate of flow.
Selfcompacting concrete is characterized by the adoption of a concreting method that does not require vibration during placing. Properties of selfcompacting concrete with recycled coarse. Selfcompacting concrete procedure for mix design paratibha aggarwal, rafat siddique, yogesh aggarwal, surinder m gupta figure 2. Mechanical vibration was, in itself, a major advance in the early twentieth century but it brought with it a number of problems including noise, vibration induced health problems for operatives and, arguably, some loss in concrete performance. Project report study on self compacting concrete using. 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. There are, however, some differences between the hvfa self compacting concrete and the hvfa concrete designed by canmet. It is the ability of scc to flow into all spaces within the formwork under its own weight. As per is4562000 6, cement is replaced by weight of material. Self compacting concrete has been used in bridges and even on precast sections. The selfcompacting concrete differs from conventional concrete in the following three characteristic features, namely, appropriate flowability, nonsegregation, and no blocking. View selfcompacting concrete research papers on academia. 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.
Testing and mix design method of self compacting concrete. 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. Based on current research and available knowledge about scc presented in this paper, the following trends are emerging. Although scc is advantageous its processability in hot climate regions is not well understood and is the main topic of this investigation. 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 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. Jul 09, 2018 self compacting concrete scc is a flowing concrete that does not require vibration and, indeed, should not be vibrated. This standard covers the test method for slump flow of selfcompacting concrete with a maximum coarse aggregate size of 40 mm or less. The concrete was cast along the entire lengths of the walls to avoid construction joints. 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. 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.
The volume of excess paste was determined by experiments. Lbox has arrangement and the dimensions as shown in figure 2. It meets the demands placed by the requirements of speed and quality in concrete construction. The present project investigates the making of self compacting concrete more affordable for the construction market by replacing high volumes of portland cement by fly ash. Roadstone self compacting concrete scc is a highly fluid and flowable non segregating concrete that requires no mechanical vibration. Therefore, it is essential to have proper mix design. The invention of self compacting concrete scc is considered one of the most important developments in the construction industry. The main characteristics of scc is the higher cement matrixaggregate ratio with respect to an ordinary concrete. Mix compositions for flowing concrete and self compacting concrete. The present project investigates the making of selfcompacting concrete more affordable for the construction market by replacing high volumes of portland cement by fly ash. Selfcompacting concrete scc is one of the most significant recent advances in concrete technology. A concrete mix can only be classified as self compacting concrete if the requirements for all the following three workability properties are fulfilled.
Self compacting concrete incorporating highvolumes of class. 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. View self compacting concrete research papers on academia. The requirements from the european guidelines for self compacting concrete for fresh selfcompacting concrete shall be measured by means of the following tests for characteristic. Scheme of compacted aggregate and concrete mixtures. 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. Self compacting concrete an overview sciencedirect topics. Self compacting concrete scc, also known asself consolidating concrete, is.
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. Self compacting concrete seminar report, ppt, pdf for. Filling and passing ability, segregation resistance are the properties of self compacting. Abstract self compacting concrete is a flowable concrete mixture with excellent strength and. Methods of testing self compacting concrete workability. Minnesota department of transportation research services section 395 john ireland boulevard, mail stop 330 st.
Most of the differences shown by scc is due to this variation of flowability from the. One of the key differences between the self compacting concrete scc and normal cement concrete ncc is the flowability property of scc by its on one of the key differences between the self compacting concrete scc and normal cement concrete ncc is the flowability property of scc by its on weight. It consists of cement, coarse and fine aggregates, water, mineral and chemical admixtures. 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 scc should present compatible quality and cost with conventional concrete cc. 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. Properties of selfcompacting concrete with recycled. Self compacting concrete scc non segregating concrete.
Final report evaluation of selfconsolidating concrete celik. 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. It does not require mechanical compaction and thus saves time, labour, equipment requirements and formwork damage. Selfcompacting concrete civil engineering community. Self compacting concrete seminar report, ppt, pdf for civil. Proceedingd of the first international rilem symposium on selfcompacting concrete. P,india is used as additives according to astm c 618 5. Scc, was first introduced in the late 1980s by japanese researchers, is highly workable concrete that can flow under its own weight through restricted. Self consolidating concrete is an emerging class of concrete materials that offers great potential for improved ease of placement, increased rate of construction, and reduced cost through reduced time and labor. 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 self compacting concrete, primarily the self compactability, and provide verification and inspection methods.
In this project, the scc was mixed onsite and pumped through a piping system to the specified point, located 200 meters away. Concrete is a mixture of cement, sand, gravel and water which dries hard and strong and is used as a material for building. Self compacting concrete incorporating highvolumes of. This recommendation specifies the performance required of selfcompacting concrete, primarily the selfcompactability, and provide verification and inspection methods. Selfcompacting 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. The center for advanced cement based materials white paper. 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. Introduction selfcompacting 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.
Concrete self compacting concrete certified concrete firth. One such latest generation concrete is self compacting concrete scc. It is used in the construction where it is hard to use vibrators for consolidation of concrete. Self compacting concrete scc advantages and disadvantages. During the last decade, concrete technology has made an enormous advance through the introduction of selfcompacting concrete. Firth scc has also been proven to have superior bond to top bar reinforcing compared to normal concrete. An increase in the flowability of concrete is known to increase the risk of segregation. The range of benefits offered go beyond fundamental aspects of concrete quality and productivity. Concrete has to be heavily vibrated for flow into very intricate forms or forms that have a lot of reinforcing bars. Selfcompacting concrete scc, or selfconsolidating concrete in usa, is a segregationfree concrete although it is so fluid that it can completely fill any area of the formwork in the absence of any compaction effort. Faculty, sahand university of technology, tabriz, iran. Selfcompacting concrete was first developed in 1988 to achieve durable concrete structures. Scc is modern innovation does not require vibration for placement and compaction. College, gujarat technological university gujarat, india.
Self compacting concrete is characterized by the adoption of a concreting method that does not require vibration during placing. Self compacting concrete is a highperformance concrete which is highly flowable or self leveling cohesive concrete that can be easily placed in the tight reinforcement. Hence to overcome these defects the self compacting concrete is used. Self compacting concrete materials, properties and tests. 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. 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. Most revolutionary development in concrete construction for several decades. Introduction selfcompacting concrete scc, which flows under its own weight and does not require any external vibration for compaction, has revolutionized concrete placement. Firth self compacting concrete scc is a concrete that flows into place under its own weight. Self compacting concrete is a recent development that shows potential for future applications. Faculty, sahand university of technology, tabriz, iran 3associated professor in civil eng. 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. Highperformance superplasticiser glenium 51 was used the concrete mixes. One of the most remarkable projects built using self compacting concrete is the akashikaikyo suspension bridge.
Selfcompacting concrete applications and advantages. Difference between self compacting and normal concrete. It is able to flow under its own weight, completely filling formwork and achieving full compaction, even in the presence of congested reinforcement. 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. Self compacting concrete scc it uses superplasticisers and stabilisers to significantly increase the ease and rate of flow.
Development of scc self compacting concrete scc developed by professor hajime. 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. Selfcompacting concrete scc for prestressed bridge girders final report prepared by. During the last decade, concrete technology has made an enormous advance through the introduction of self compacting concrete. Compressive strength of self compacting concrete by aurelia bradu, nicolae cazacu, nicolae florea and petru mihai gheorghe asachi technical university of iasi, faculty of civil engineering and building services, received.
Scc, was first introduced in the late 1980s by japanese researchers, is highly workable concrete that can flow under its own weight. Acbm organized a research team in the fall of 2004 to coordinate ongoing research activities toward three theme questions. Selfcompacting concrete scc is an innovative concrete that does not requires vibration for placing and compaction. Selfcompacting concrete scc for prestressed bridge girders. It can be poured quickly, flowing and spreading effortlessly.
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