Properties of selfcompacting concrete with recycled. The main advantages of self compacting concrete are. Faculty, sahand university of technology, tabriz, iran 3associated professor in civil eng. The test results for acceptance characteristics of selfcompacting concrete such as slump flow. Faculty, sahand university of technology, tabriz, iran. Although poor compaction is not prevalent in the majority of concrete cast today, any development that reduces the risks must be considered as. Pdf performance of selfcompacting concrete containing. Selfcompacting concrete scc is an innovative concrete that does not requires vibration for placing and compaction. Self compacting concrete scc non segregating concrete. Scc, was first introduced in the late 1980s by japanese researchers, is highly workable concrete that can flow under its own weight. Selfcompacting concrete has several advantages such as. The center for advanced cement based materials white. Department of civil engineering university of minnesota. It is able to flow under its own weight, completely filling formwork and achieving full compaction, even in the presence of congested reinforcement.
In this project, the scc was mixed onsite and pumped through a piping system to the specified point, located 200 meters away. It uses super plasticisers and stabilizers to significantly increase the ease and rate of flow. A numerical model for selfcompacting concrete flow. 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. Explore self compacting concrete with free download of seminar report and ppt in pdf and doc format.
A concrete mix can only be classified as self compacting concrete if the requirements for all the following three workability properties are fulfilled. Presidency, 201220, it is possible that construction projects will start to experience even higher pressure on. There are, however, some differences between the hvfa self compacting concrete and the hvfa concrete designed by canmet. Here, the grading and packing of all solids in the concrete mix serves as a basis for the development of new concrete mixes.
Selfcompacting concrete applications and advantages. Most of the researches have been done on steel fiber reinforced concrete, but these kinds of fibers cause a sharp drop in fresh properties of concrete and reduce its performance. Further, compressive strength at the ages of 7, 28, and 90 days was also determined and results are included here. The ingredients for selfcompacting concrete are similar to conventional concrete.
Faculty, sahand university of technology, tabriz, iran 2m. This recommendation specifies the performance required of selfcompacting concrete, primarily the selfcompactability, and provide verification and inspection methods. 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. The utilisation of selfcompacting concrete scc is growing rapidly. Selfcompacting concrete scc is a mixture of flowing concrete which is able to compact or consolidate by its own weight.
One of the most remarkable projects built using self compacting concrete is the akashikaikyo suspension bridge. Selfcompacting, concrete, workability, superplasticizer dosage, test. 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. It is the ability of scc to flow into all spaces within the formwork under its own weight. Keywords self compacting concrete, flowability, passing ability, resistance to segregation, fly ash, superplasticizer.
In most previous studies on selfcompacting concrete, t400 is used to estimate the flow velocity of selfcompacting concrete. Received 17th june 2012, revised 19 th june 2012, accepted 21 st june 2012 abstract self compacting concrete is one of the most revolutionary developments in concrete research. Selfcompacting concrete is characterized by the adoption of a concreting method that does not require vibration during placing. 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. The self compacting concrete has a major disadvantage of its cost due to additional usage of. Selfcompacting concrete scc v introduction to selfcompacting concrete. The flow able fluid nature of selfcompacting concrete makes it a good choice for placing concrete in difficult or under cha. Construction worker controlling flow of concrete from concrete pump, n14 highway, lanseria, gauteng. One of main advantages of concrete improved with fly ash is. Self compacting concrete scc advantages and disadvantages self compacting concrete. The invention of self compacting concrete scc is considered one of the most important developments in the construction industry. Selfcompacting concrete procedure for mix design from. Self compacting concrete seminar report, ppt, pdf for.
Ozawa introduction selfcompacting concrete scc is an pioneering concrete that does not involve shuddering for insertion and compaction. Testing selfcompacting concrete evaluate the deformability of scc in the absence of obstacles. Selfcompacting concrete scc is a flowing concrete that does not require vibration and, indeed, should not be vibrated. Mechanical behavior of selfcompacting reinforced concrete. M sonebi, medium strength selfcompacting concrete containing fly ash. The use of scc brings a series of advantages that can be classified into. Lightweight self compact, concrete, durability, leca. Design and application of self compacting concrete. Despite intensive research and a substantial number of. Introduction self compacting concrete scc represents one of the most significant advances in concrete technology for decades. Selfcompacting concrete can be defined as the concrete which requires no vibrations and can flow around obstructions, encloses the reinforcement and fills up the formwork completely under its self weight. The work presented in this paper seeks to build on the existing knowledge in this area by.
The term selfcompacting concrete scc refers to a new special type of concrete mixture. Self compacting concrete incorporating highvolumes of. Self compacting concrete scc advantages and disadvantages. Roadstone self compacting concrete scc is a highly fluid and flowable non segregating concrete that requires no mechanical vibration. Selection of the type of cement will depend on the overall requirements for the concrete, such as strength, durability etc. Selfcompacting concrete civil engineering community. It can be poured quickly, flowing and spreading effortlessly. The range of benefits offered go beyond fundamental aspects of concrete quality and productivity. There are several methods for testing its properties. Self compacting concrete, confinements, strength, ductility. Placing and curing selfcompacting concrete in hot climates carlos f.
Modelling using factorial experimental plans, cement and concrete research, vol 34, pp 11991208, 2004. Introduction selfcompacting concrete scc, which flows under its own weight and does not require any external vibration for compaction, has revolutionized concrete placement. The paper presents an experimental procedure for the design of selfcompacting concrete mixes. Development of scc self compacting concrete scc developed by professor hajime. View selfcompacting concrete research papers on academia. The materials, tests and properties of self compacting concrete are explained in the. Okamura in japan to offset a growing shortage of labour ouchi m 1999119. However, no specification for t1 is given in efnarc or other codes. Improper consolidation of conventional concrete results in significant durability loss which is one of the primary advantages of scc hence its original development. Selfcompacting concrete scc for prestressed bridge girders. First, the features of japanese and chinese methods are discussed, in which the packing of sand and gravel plays a major role. Selfcompacting concrete scc for prestressed bridge girders 7.
However, to date limited research exists exploring the use of coarse rca in scc. 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. It consists of cement, coarse and fine aggregates, water, mineral and chemical admixtures. Self compacting concrete materials, properties and tests. Over the last ten years, significant amount of work has been carried out on selfcompacting concrete all over the world. This research investigated selfcompacting concrete scc with levels of up to 80% cement replacement by fly ash in mixes adjusted to give constant fresh concrete properties. Selfcompacting concrete scc is considered as a concrete with high workability that is able to flow under its own weight and completely fill the formwork, even in the presence of dense. 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 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.
Mixes, consisting of slag blended cement, gravel 416mm, three types of sand 01, 02 and 0. It is able to flow and consolidate under its own weight, completely filling the formwork even in the presence of dense reinforcement. Magnel laboratory for concrete research 2 selfcompacting concrete. Development of selfcompacting ecoconcrete abstract ever since its introduction and increasingly widespread use since the early nineties, new mix design methods of selfcompacting concrete scc can hardly be recognized. Acbm organized a research team in the fall of 2004 to coordinate ongoing research activities toward three theme questions. Specification and guidelines for selfcompacting concrete efnarc. Self compacting concrete has been used in bridges and even on precast sections. Combining the advantages of both types is a new field of research. 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. Environmentallyfriendly selfcompacting concrete gradevinar.
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 a highly fluid concrete that does not require any vibration during the placement process 1, 2. 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. This standard covers the test method for slump flow of selfcompacting concrete with a maximum coarse aggregate size of 40 mm or less. Selfcompacting concrete is a fluid mixture suitable for placing in structures with. Self compacting concrete incorporating highvolumes of class f. Introduction selfconsolidating concreteorselfcompacting concrete scc is characterized by a low yield stress, high deformability, and moderateviscositynecessary to ensure uniform suspension of solid particles during transportation, placement without external. It is able to gush under its own load, completely filling form. This research work presents properties of selfcompacting concrete after replacement of fine aggregate with powder of waste marble at different percentages 0%, 10%, 20%, 30% 40% and 50%. Contractors may wish to consider possible advantages of pumping from the bottom of. As per is4562000 6, cement is replaced by weight of material. Mathematical modeling for durability characteristics of fly ash concrete.
Highly fluid, agilia is the ultimate selfcompacting concrete. Magnel laboratory for concrete research 3 selfcompacting concrete. Considering its lightweight structure and ease of placement, lightweight selfcompacting concrete may be the answer to. Inadequate homogeneity of the cast concrete due to poor compaction or segregation may. Okamura from the university of tokyo japan is mainly responsible for initiating the development of scc. Self compacting concrete scc, also known asself consolidating concrete, is. Selfcompacting concrete scc was developed to solve durability. This paper addresses experiments and theories on selfcompacting concrete. Selfcompacting concrete with limestone powder for transport. P,india is used as additives according to astm c 618 5.
Self compacting concrete scc has successfully met the challenge and is now increasingly being used in routine practice. The concrete was cast along the entire lengths of the walls to avoid construction joints. Self compacting concrete scc can be defined as fresh concrete that flows. Though the concept originally was thought to be a tool to. All types of cement conforming to en 197 are suitable. Methods of testing self compacting concrete workability. 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. There are many advantages of using scc, especially when the material cost is minimized.