A simple mix design method for self compacting concrete. A typical mix design of scc in comparison with conventional concrete. Selfconsolidating concrete, also known as selfcompacting concrete scc, is a highly flowable, nonsegregating concrete that spreads into place, fills formwork, and encapsulates even the most congested reinforcement, all without any mechanical vibration. Investigations for establishing a rational mix design method and selfcompactability testing methods have been carried out from the. Therefore, this method reduces considerably the extent of laboratory work, the testing. Mix design of self consolidating concretes exercise 8 mycourses. Selfcompacting concrete applications and advantages. The test results for acceptance characteristics of. Self compacting concrete seminar report, ppt, pdf for. A total of 8 numbers of column specimens have to be tested in this experimental investigation. However, even nowadays, there is still a lack of knowledge about scc, especially regarding the few practical mix design methods available. In the mix design of scc, the relative proportions of key components are generally considered by. Self compacting concrete scc is an innovative concrete that does not require vibration for placing and compaction. Self compacting concrete seminar report, ppt, pdf for civil.
The concrete mix of scc must be placed at a relatively higher velocity than that of regular 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. Self compacting concrete has been placed at heights taller than 5 meters without aggregate segregation. Self compacting concrete download ebook pdf, epub, tuebl, mobi. The main ingredients used in design of self compacting concrete are. Self compacting concrete scc is a type of concrete, which flows under the sole influence of gravity up to leveling, air out and consolidates itself without any external compaction energy. Pdf selfcompacting concrete procedure for mix design. Ordinary portland cement either 43 or 53 grade cement can be used. Viscosity of the mortar and the volumetric fraction of the aggregates control the flow behavior. Self compacting concrete download ebook pdf, epub, tuebl. It covers the basic principles and underlying scientific theory, practical advice for production of scc and its use in construction practice. Started in japan, numbers of investigations were reported worldwide on the mix design of scc, its microstructure and durability aspects.
This specification and guideline utilises efnarcs broad practical experience with scc to provide a framework for design and use of high quality scc. The relative proportions of key components are considered by volume rather than by mass. Best practices guidelines for selfconsolidating concrete 3 what is selfconsolidating concrete. Self compacting concrete, mix design, plastic stage, compressive strength, rice husk ash 1. Selfconsolidating concrete scc, also referred to as selfcompacting concrete, is able to flow and consolidate on its own. Efnarc guidelines for scc available as a free download from. It is able to gush under its own load, completely filling form. The self compacting concrete, which contains more fines content, is proved to be more durable. A practical mix design method for selfcompacting concrete. Investigations for establishing a rational mix design method and self compactability testing methods have been carried out from the. Keywords self compacting concrete, flowability, passing ability, resistance to segregation, fly ash, superplasticizer. It can be used in precast applications or for concrete placed on site. 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. Importantly, the investigation aims to highlight the opportunities for using scc in south africa.
Faster construction and requires less manpower reduce the overall cost of production. In 1988, selfcompacting concrete scc a highfl uidity concrete that maintains its stability was developed in japan. Very simply, self consolidating concrete scc is simply a mix that is optimized for flow characteristics. A simple tool for self compacting concrete mix design. The specimens are of size mm diameter and 750mm in height. Mix design of self compacting concrete with limestone filler versus.
Introduction the development of self compacting concrete scc by professor hajme 1 okamura and k. Selfcompacting concrete with a similar water cement or cement binder ratio will usually have a slightly higher strength compared with traditional vibrated concrete, due to the lack of vibration giving an improved interface between the aggregate and hardened paste. Self compacting concrete materials, properties and tests. Self compacting concrete an overview sciencedirect topics. A simple tool has been designed for self compacting concrete scc mix design with 29% of coarse aggregate, replacement of cement with metakaolin and. The test mixes were found to meet the necessary selfcompacting and the compressive strength criteria, thus fully validating the proposed mix proportioning method. The concrete community of various european countries intensely researches its application and implements experiences.
Learning outcomes understanding the basics of scc being familiar with the requirements and limits of designing a scc concrete mix implementing the scc concrete mix design tool excel work sheet being able to adjust the scc mix ingredients. The utilisation of self compacting concrete scc is growing rapidly. In this paper, investigation for establishing a rational mix design method with self compatibility been carried out from the viewpoint of making self compacting concrete. Traditionally, concrete with the fluidity of scc has had a very high watertocement ratio, which would lower compressive strengths and compromise.
Scc can be made from any of the constituents that are generally used for structural concrete. The highly fluid nature of scc makes it suitable for placing in difficult conditions and in sections with congested reinforcement. Ozawa introduction selfcompacting concrete scc is an pioneering concrete that does not involve shuddering for insertion and compaction. This paper deals with the mix design of selfcompacting concrete. Written by an international group of contributors who are. Lackof globally accepted test standard and mix design costlier than conventional concrete based on concrete. Self compacting concrete scc is a special type of concrete able to flow and compact under its self weight. A simple tool has been designed for self compacting concrete scc mix design with 29% of coarse aggregate, replacement of cement with metakaolin and class f flyash, combinations of both and controlled scc mix with 0. Explore self compacting concrete with free download of seminar report and ppt in pdf and doc format.
Generally the three major characteristics of concrete are workability, strength, and durability. The scc requires high powder content mainly of cement up to 600kgm 3 to achieve its. Comparison of scc over nc ingredients normal concrete selfcompacting concrete. It is able to flow under its own weight, completely filling formwork and achieving full compaction, even in the. 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. 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. As no specific mix design procedures for scc are available mix design can be done with conventional bis method and suitable adjustments can be done as per the guidelines provided by different agencies.
Fresh concrete is combined of fine and coarse aggregates suspended in a matrix of binder paste. However the technological considerations and mixing problems in lwc and scc still govern the lwscc mix design. In 1988, self compacting concrete scc a highfl uidity concrete that maintains its stability was developed in japan. Selfcompacting concrete scc it uses superplasticisers and stabilisers to significantly increase the ease and rate of flow.
Selfcompacting concrete scc was founded in 1986, from these days until now its used profusely due to its different features like one of them the sustainability by using the waste materials. The highlight of this paper is, simplest process of mix design according to indian standard code of mix design is10262 and it. A simple tool has been designed for self compacting concrete scc mix design with 29% of coarse aggregate, replacement of cement with metakaolin and class f flyash. Self compacting concrete was first developed 1988 in order to achieve durable concrete structures. The utilisation of selfcompacting concrete scc is growing rapidly. Scc results in durable concrete structures, and saves labour and consolidation noise. The composition of self compacting concrete is same of. Mix design yang mampu memenuhi kriteria filling ability, passing ability dan ketahanan terhadap segregasi. Jun 17, 2019 the concrete mix of scc must be placed at a relatively higher velocity than that of regular concrete. A simple mix design method for selfcompacting concrete. Sangat encer, bahkan dengan bahan aditif tertentu bisa menahan slump tinggi dalam jangka waktu lama slump keeping admixture. Self compacting concrete scc was founded in 1986, from these days until now its used profusely due to its different features like one of them the sustainability by using the waste materials. Ozawa introduction self compacting concrete scc is an pioneering concrete that does not involve shuddering for insertion and compaction. Mix design requirements for self compacting concretescc.
The composition of self compacting concrete is similar to that of normal concrete, that is, cement, fine and coarse aggregates, water, mineral and chemical admixtures. Pdf a simple tool for self compacting concrete mix design. The mix designed as per the requirements are tested before using it in construction. In this paper, investigation for establishing a rational mixdesign method with selfcompatibility been carried out from the viewpoint of making selfcompacting concrete. Over the last years, scc has been successfully used.
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. Best practices guidelines for selfconsolidating concrete. Self compacting concrete scc is a flowing concrete mixture that is able to consolidate under its own weight. Since then, various investigations have been carried out, and the concrete has been used in practical structures in japan, mainly by large construction companies. Concrete producers must retrain their eyes for this very fluid mixture as it turns corners and fills forms. The paper presents an experimental procedure for the design of self compacting concrete mixes. Mix design for self compacting concrete or scc cannot be conducted directly because there are many control parameters in its rheological properties. Self consolidating concrete, also known as self compacting concrete scc, is a highly flowable, nonsegregating concrete that spreads into place, fills formwork, and encapsulates even the most congested reinforcement, all without any mechanical vibration. Introduction selfcompacting concrete scc, which flows under its own weight and does not require any external vibration for compaction, has revolutionized concrete placement. The test mixes were found to meet the necessary self compacting and the compressive strength criteria, thus fully validating the proposed mix proportioning method.
It was a response to the lack of qualified skilled workers at the construction sites and a solution for the accomplishment of durable concrete structures. Selfcompacting concrete scc is an innovative concrete that does not requires vibration for placing and compaction. Selfcompacting concrete scc is a type of concrete, which flows under the sole influence of gravity up to leveling, air out and consolidates itself without any external compaction energy. It is super workable due to its low watercement ratio, which gives rapid strength development, more durability, and best quality. The selfcompacting concrete european project group was founded in january 2004 with. Selfcompacting concrete procedure for mix design paratibha aggarwal, rafat siddique, yogesh aggarwal, surinder m gupta figure 2. Mix design of self consolidating concretes exercise 8 exercise 8. National institute of technology, uttarakhand, india. Self consolidating high performance concrete scc self. By the early 1990s, japan has developed and used scc. Scc, was first introduced in the late 1980s by japanese researchers, is highly workable concrete that can flow under its own weight. Selfcompacting concrete scc is a flowing concrete mixture that is able to consolidate under its own weight.
Scc is a special kind of concrete that can flow through and fill the gaps of reinforcement and corners of molds without any need for vibration and compaction. The notable difference of scc from normal concrete is that, the scc has more. At the same time it is cohesive enough to fill spaces of almost any size and shape without segregation or bleeding. Ozawa in 1986 has made an amazing impression on the construction industry by overcoming some of the complications associated with concrete in.
Pdf a simple mix design method for selfcompacting concrete. Selfcompacting concrete scc is becoming a popular form of concrete usage in a range of applications throughout the world. Testing selfcompacting concrete testing selfcompacting concrete assessing the workability of scc mix can be divided into three categories. It is believed that strength and durability are related to the hardened concrete and workability is related to the fresh concrete, however hardened properties may be directly attributed to the mix design and fresh properties. A concrete mix can only be classified as scc if it has the above mentioned characteristics. The size of the aggregates used for scc design is limited to 20mm. 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. Self compacting concrete scc is becoming a popular form of concrete usage in a range of applications throughout the world. The basic properties to be achieved by an scc mix is flowability, passing ability, strength, and segregation resistance. Scc, similarly to all concrete mixes, should be carefully designed to achieve the required performance characteristics, while being properly placed and properly cured. Scc concrete, also known as self consolidating concrete and self compacting concrete is a highly flowable, nonsegregating concrete that spreads into place, fills formwork, and surrounds even the most congested reinforcement, without the use of any mechanical vibration. Self compacting concrete scc advantages and disadvantages. Mix design of self compacting concrete based on ultra high. Scc concrete selfconsolidating concrete mixes a very.
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 can also be used in areas with normal and congested reinforcement, with aggregates as large as 2 inches. Selfcompacting concrete procedure for mix design from. Pdf mix design of selfcompacting concretea new approach. To be considered self compacting, concrete must flow easily under its own weight, so its yield stress must be very low. Selfcompacting concrete was first developed 1988 in order to achieve durable concrete structures. Self compacting concrete scc mix design must involve key practices to achieve the requirements of quality and durable mix.
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. 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. Download the latest pdf and ppt on slideshare for civil projects. Scc can be placed easily in complicated formwork and dense reinforcement. Selfcompacting concrete scc is an innovative concrete that does not require vibration for placing and compaction. Kelebihan self compacting concrete scc kelebihan dari scc diantaranya. It is able to flow under its own weight, completely filling formwork and achieving full compaction, even in the presence of congested reinforcement.
Learning outcomes understanding the basics of scc being familiar with the requirements and limits of designing a scc concrete mix implementing the scc concrete mix design tool excel work sheet. This paper deals with the mix design of 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. This investigation considers the development of the technology and use of scc. Scc looks very different from conventional concrete while mixing. Materials, properties and applications presents the latest research on various aspects of selfcompacting concrete, including test methods, rheology, strength and durability properties, scc properties at elevated temperature, sc manufacturing with the use of scms, recycled aggregates and industrial byproducts.
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