Selfcompacting concrete procedure for mix design, 24. Scc is a family of tailored concretes with special engineered properties in the fresh state. Comparison of selfcompacting concrete and conventional concrete. Lbox has arrangement and the dimensions as shown in figure 2. Self compacting concrete scc it uses superplasticisers and stabilisers to significantly increase the ease and rate of flow. In the present study, a selfcompacting concrete mix of 50 mpa compressive strength was designed, using locallyavailable materials in christchurch, new zealand. Since the concrete is capable of selfconsolidating and reaching the difficult areas in moulds, manual variables in terms of placing and.
The highly fluid nature of scc makes it suitable for placing in difficult conditions and in sections with congested reinforcement. Selfcompacting concrete scc for prestressed bridge girders. 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. The workability slump, vfunnel and lbox the test carried out on fresh 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. 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.
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. Controlling fresh properties of selfcompacting concrete. Admixtures a polycarboxylic ether based superplasticizer complying with astm c494 type f, was 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. The production of selfcompacting concrete scc with low density has become a major challenge for civil engineering, especially regarding the dosage and maintenance of mechanical strength.
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. 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. 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. Paper open access effect of superplasticizer on workability. Scc generally possess high power content, which keeps the concrete cohesive regarding flow ability. Effect of curing conditions on the engineering properties of. This specification and guideline utilises efnarcs broad practical experience with scc to provide a framework for design and use of high quality scc. Self compacting concrete scc is an innovative construction material with a favourable rheological behaviour, which is caused in the modified concrete composition. Selfcompacting concrete scc selfconsolidating concrete in north america is a family of tailored concretes with engineered properties in the fresh state.
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. The paper reports an experimental study investigating the influence of curing conditions on the engineering properties of selfcompacting concretes scc. A new mix design method for selfcompacting concrete in which the amount of aggregates required was determined, and the paste of binders was then filled into the voids of aggregates to ensure that the concrete thus obtained has flow ability, selfcompacting ability and other desired scc properties 4. Selfcompacting properties include a good flowability in the fresh state, and a good cohesiveness against segregation. Study on strength properties of self compacting concrete. Properties of selfcompacting concrete with recycled. Selfcompacting concrete has been used in bridges and even on precast sections. Six precast prestressed bridge girders were cast using four scc and two conventional concrete mixes. Download the latest pdf and ppt on slideshare for civil projects.
Selfcompacting concrete scc represents one of the most outstanding advances in concrete technology during the last decade. Lahoud centre for built infrastructure research, university of technology, sydney, australia abstract. Three types of superplasticizers conplast sp 561, conplast sp 430 and conplast sp 264 at different percentages 0, 10, 20 and 30% with the same water cement ratio of 0. Selfconsolidating concrete scc is highly flowable, nonsegregating concrete that can spread into place, fill the formwork, and encapsulate the reinforcement without any mechanical consolidation. Extensive testing of physical and mechanical properties of scc was carried out during the past decade. Selfcompacting concrete scc time development of the. Scc is characterized by its ability to flow into the formwork under its own weight and without segregating.
No single method has been found until date, which characterizes all the relevant workability aspects, and hence, each mix has been tested by more than one test. Mixing and casting are much easier thanks to its incredible properties of scc. Properties of selfcompacting concrete with recycled coarse. Selfcompacting concrete procedure for mix design paratibha aggarwal, rafat siddique, yogesh aggarwal, surinder m gupta the properties of fly ash conform to is. Comparison of self compacting concrete and conventional concrete. Jun 05, 2014 the state of theart report of rilem technical committee 228mps on mechanical properties of self compacting concrete scc summarizes an extensive body of information related to mechanical properties and mechanical behaviour of scc. 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. Keywordsself compacting concrete,steel fiber,super plasticzicer,viscocity modifying agent,mechanical properties. Selfcompacting concrete scc time development of the material properties and of the bond behaviour 117 the present procedure for the production of selfcompacting concrete is predominantly empirical. Jun 17, 2019 self compacting concrete has been used in bridges and even on precast sections.
Utility concrete products specializes in selfconsolidating concrete scc, also known as self compacting concrete, which is a highperforming concrete that can be poured into place flowing over obstacles such as heavily reinforced structures and into complex forms with little or no vibration needed without segregating. It is used in the construction where it is hard to use vibrators for consolidation of concrete. The work presented in this paper seeks to build on the existing knowledge. Self compacting concrete scc, also known asself consolidating concrete, is. Keywords concrete, self compacting concrete, vfunnel, lbox, density, compressive strength 1. Portland cement pc concrete and two types of scc, i. 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. Feb 27, 2014 based on above results conclusions are drawn and discussions the following self compacting concrete scc technology can save time, cost, enhance quality, durability and moreover it is a green concept. It uses super plasticisers and stabilizers to significantly increase the ease and rate of flow. The paper reports an experimental study investigating the influence of curing conditions on the engineering properties of self compacting concretes scc. In many aspects selfcompacting concrete scc self consolidating concrete in north america can be considered the concrete of the future.
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. Evaluation of fresh and hardened properties of self. Experimental study on fiber reinforced self compacting. Self compacting concrete an overview sciencedirect topics. 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. Self compacting concrete scc, or self consolidating 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. 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. Study on strength properties of self compacting concrete by. This standard covers the test method for slump flow of self compacting concrete with a maximum coarse aggregate size of 40 mm or less. The ingredients used in the selfcompacting concrete is the same using in the conventional concrete. Materials, properties and applications presents the latest research on various aspects of self compacting 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. Self compacting concrete scc is a flowing concrete mixture that is able to consolidate under its own weight. Selfcompacting concrete scc is a flowing concrete that does not require vibration and, indeed, should not be vibrated. Effect of curing conditions on the engineering properties.
Keywords concrete, selfcompacting concrete, vfunnel, lbox, density, compressive strength 1. One of the most remarkable projects built using selfcompacting concrete is the akashikaikyo suspension bridge. In general, scc is concrete made with conventional concrete materials and, in some cases, with a viscositymodifying admixture vma. The notable difference of scc from normal concrete is that, the scc has more fines content, high range water reducing agents super plasticizers. Finally, the effect of watercement ratio on the plastic properties of selfcompacting concrete was quite negligible compared to conventional concrete. Selfcompacting concrete scc is an innovative concrete that does not requires vibration for placing and compaction. 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.
Self compacting concrete materials, properties and tests. 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. This research work presents properties of self compacting concrete after replacement of fine aggregate with powder of waste marble at different percentages 0%, 10%, 20%, 30% 40% and 50%. Properties of flowing concrete and selfcompacting concrete with highperformance superplasticier dr. Based on above results conclusions are drawn and discussions the following self compacting concrete scc technology can save time, cost, enhance quality, durability and moreover it is a green concept. It can also be high strength to improve its durability compared to the normal concrete 1. Self compacting concrete seminar report, ppt, pdf for civil. Properties of concrete mixtures the results of the examinations of concrete mixtures and rheological tests are shown in tables 3 and 4, respectively. Self compacting concrete seminar report, ppt, pdf for. Mechanical and corrosion properties of a reinforcing steel. The ingredients used in the self compacting concrete is the same using in the conventional concrete. Selfcompacting concrete scc is an innovative construction material with a favourable rheological behaviour, which is caused in the modified concrete composition.
A new mix design method for self compacting concrete in which the amount of aggregates required was determined, and the paste of binders was then filled into the voids of aggregates to ensure that the concrete thus obtained has flow ability, self compacting ability and other desired scc properties 4. Selfcompacting concrete applications and advantages. The main characteristics of scc is the higher cement matrixaggregate ratio with respect to an ordinary concrete. Self compacting concrete concrete that is able to flow under its own weight and completely fill the form work even in the presence of congestion of reinforcement without the. Based on this fact scc offers improved fresh concrete but also hardened material properties and therefore many advantages regarding the productivity and the design potential. 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.
The utilisation of selfcompacting concrete scc is growing rapidly. Selfcompacting concrete scc it uses superplasticisers and stabilisers to significantly increase the ease and rate of flow. Fresh and hardened properties of selfcompacting concrete. In this project, the scc was mixed onsite and pumped through a piping system to the specified point, located 200 meters away. Selfcompacting concrete scc is a flowing concrete mixture that is able to consolidate under its own weight. On the basis on these data one can find that the self compacting concrete mixtures with limestone powder need more superplasticizer and water to attain the required parameters of scc material. The mix design is based on experience from japan, the netherlands, france and sweden.
Due attention is given to the fact that the composition of scc varies significantly. 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. Self compacting properties include a good flowability in the fresh state, and a good cohesiveness against segregation. However, to date limited research exists exploring the use of coarse rca in scc. The work presented in this paper seeks to build on the existing knowledge in this area by. Apart from the gp control mix, other benchmark scc mix containing class f fly ash was also cast for comparison with glass scc mixes. Properties of flowing concrete and self compacting concrete with highperformance superplasticier dr. This standard covers the test method for slump flow of selfcompacting concrete with a maximum coarse aggregate size of 40 mm or less. One of the most remarkable projects built using self compacting concrete is the akashikaikyo suspension bridge. 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. The effect of limestone filler on the properties of self. The production of self compacting concrete scc with low density has become a major challenge for civil engineering, especially regarding the dosage and maintenance of mechanical strength. The flowability of scc is measured in terms of spread when using a modified version of the slump test.
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. Filling and passing ability, segregation resistance are the properties of self compacting. The advent of self compacting concrete represents a considerable step forward in respect of the durability of the structures. Self compacting concrete concrete that is able to flow under its own weight and completely fill the form work. Explore self compacting concrete with free download of seminar report and ppt in pdf and doc format.
667 621 1013 853 645 374 610 865 872 986 10 1061 115 1297 1059 1103 725 414 170 1301 860 1157 225 1519 127 817 1067 527 623 294 796 980 40 988 444 830 1246 403