To Study Physical Properties of Self Compacting Concrete

2016

Concrete is the construction material which have been used from early times. The materials which are used for buildings, industries and for other purposes should be environmental friendly during usage. Self-compacting concrete is the most innovative type concrete in the recent days. Self-compacting concrete (SCC) does not require any type of vibration during its placement and compaction. The concrete is able to keep moving under its own weight through any type of formwork without any external compaction and even the concrete can flow through congested reinforcement. The amazing thing about SCC is that though it is not a conventional concrete but in its hardened state it is dense homogeneous and has same durability aspects as the normally vibrated concrete. To get the properties of fresh concrete for SCC mineral and chemical admixtures are added. An overview paper is presented based on research work of SCC through this decade. The test data says that the mechanical properties of SCC ...

—This article is the review study about the principle, properties, characteristics, method to form Self-compacting concrete, advantages and disadvantages of Self-compacting concrete. In this review article, SCC was made up of cement, fine aggregates, coarse aggregates, water and fly ash, etc. at different replacement level i.e. 10%, 20%, 30%, 40% and 50%. Concrete is a family of fine aggregate, water, binding material & coarse aggregate. But as always there is some limitation like self-compaction, surface finishes, etc. Hence to overcome this limitation, we try to make SCC with the help of mineral admixture. SCC is the concrete that can be placed & compacted under its own weight without any vibration effort. In 1980, Okamura first developed SCC in Japan. Significant research was carried out around the world for different applications of SCC with respect to identification of mix proportions and properties. This paper mainly tells about the mix proportions by various ecofriendly materials and to critically review the mechanical properties of SCC by partial replacement of cement and fine aggregate. The main observation was that the properties of SCC were improved to a considerable extent by the fine materials.

Self-Compacting Concrete Originally developed in Japan, SCC technology was made possible by the much earlier development of Superplasticisers for concrete. To compare the performance of SCC with Fly Ash 20%, Silica Fume 10%, Rice Husk Ash (5%, 10%, and 15%) as a partial replacement of cement, due to the high increase in construction which has brought a heavy demand for ingredients of concrete such as cement and sand, and these materials are becoming costly and scarce. The use of self-compacting concrete (SCC) is spreading worldwide because of its very attractive properties in the fresh state as well as after hardening. By using Super plasticizer (High Range Water Reducing Admixture) to increase the workability & admixture should bring about the required water reduction & fluidity but should also maintain the dispersing effect. The Using M40 grade of concrete with curing period of 7days, 14days and 28days.To Study the workability and mechanical properties of Self-Compacting Concrete & Compare to Conventional Self-Compacting Concrete. The laboratory testing included slump flow test, L-Box test, V-Funnel test, compressive strength test, and splitting tensile strength test.

2018

Self-compacting concrete is a most preferredtype of concrete, due to its complete flow ability without using vibrating tools. It is easily feasible for any shape and size of the formwork. Self-compacting concrete is one of the green technics for avoiding sound effect on construction site. The fly ash will be very helpful to reduction of natural resources for manufacturing cement and also very little effect in production of carbon emission gases. The mix design is made according to IS 10262:2009.Self-compacting concrete represents one of the most significant advances in concrete technology for decades. It is a high workable concrete and do not require any external vibration for consolidation. Inadequate homogeneity of the cast concrete due to poor compaction or segregation may drastically lower the performance of mature concrete. SCC ensures adequate compaction and facilitate placement of concrete in structures with congested reinforcement and in restricted areas. The fresh state pro...

2018

In this study ,We have reviewed many researches and papers that have recently been interested in the self-compacting concrete, its properties and additives, some of the studies focused on the use of specific additives in the self compacting concrete and the study of the effectiveness of these additives and their impact on the different properties of the concrete and its durability and performance, and we summarized the most important results, especially the results related to mechanical properties. Through the data available in recent previous studies, we studied the mechanical properties of self compacted concrete compared to normal vibrated concrete. the comparison was for compressive strength and tensile strength. We also presented a summary of the effect of use of various admixtures on the mechanical properties of self-compacted concrete, which may be useful in comparing the additives on the basis of their effect on the properties of self compacting concrete And to know the char...

The primary aim of this study is to investigate the strength properties and flexural behaviour of beam, of M40 grade self-compacting concrete made with fly ash, GGBFS and a mixture of both in different proportions and compare its values with M40 grade conventional concrete. Conventional concrete is designed by using IS: 10262-2009 and SCC is designed using Modified Nan Su method. For this purpose cement is replaced by weight in three different proportions of 10%, 20% and 30% by fly ash and GGBFS respectively. Also 20 % of cement was replaced by fly ash and GGBFS in different proportions such as 70%:30%, 60%:40% and 50%:50%. The characteristics of SCC like passing ability, flow ability and resistance to segregation have been checked using slump flow, L box test and V funnel test as per EFNARC guidelines. Specimens are tested for compressive strength, flexural strength, splitting tensile strength.

Thrown in situ cementing is the most every now and again utilized materials innovation worldwide with its creation in auxiliary edges. In India, this innovation overwhelms the business sector however is tested by other aggressive generation routines. The feedback concerns issues with respect to example short section compasses (restricted adaptability for future repair), long generation times, unfortunate workplace and indoor air issues. A hefty portion of these hindrances are because of the way that by custom normal second rate concrete is utilized as a part of development field. Broad concrete materials research on SCC has uncovered chances to counter the feedback of cast in situ concrete, however the innovations are not yet used in vast degree. The examination venture goes for researching the capability of SCC for aggressive creation, basic plan and capacity of auxiliary edges of cast in-situ concrete. For quite a while, the issue of the strength of concrete structures has been a noteworthy issue postured to builds. To make strong concrete structures, adequate compaction is required. Compaction for traditional concrete is finished by vibrating. Over vibration can without much of a stretch reason isolation. In customary concrete, it is hard to guarantee uniform material quality and great thickness in vigorously strengthened areas. On the off chance that steel is not legitimately encompassed by concrete it prompts auxiliary and toughness issues. This is the issue primarily with intensely strengthened segments where a high clog of support is seen. For this situation, it turns out to be to a great degree hard to reduced the concrete. At that point what should be possible to abstain from honeycombing?. The response to the issue might be a sort of concrete which can get compacted into each side of structure work and hole between steel, absolutely by method for its own weight and without the requirement for compaction. The SCC idea was required to defeat these challenges. The SCC idea can be expressed as the concrete that meets unique execution and consistency necessities that can't generally be gotten by utilizing routine fixings, typical blending strategy and curing hones. The SCC is a built material comprising of bond, totals, water and admixtures with a few new constituents like colloidal silica, pozzolanic materials, substance admixtures to deal with particular necessities ,, for example, high-flowability, compressive quality, high workability, improved resistances to synthetic or mechanical hassles, lower porousness, sturdiness, resistance against isolation, and probability under thick fortification conditions. The properties, for example, ease and high imperviousness to isolation empowers the position of concrete without vibrations and with decreased work, clamor and a great deal less wear and tear of hardware. Utilization of SCC conquers the issue of concrete position in intensely strengthened areas and it abbreviates development period. Self compacting concrete is becoming quickly, particularly in the precast business sector where its focal points are quickly comprehended and used. Superplasticiser improves deformability and with the decrease of water, additionally powder isolation resistance is expanded. High deformability and high isolation resistance is acquired by constraining the measure of coarse total. On the other hand, the high measurements of super-plasticizer utilized for diminishment of the water content and for better workability, the high powder content as "ointment" for the coarse totals, and also the consistency specialists. Article demonstrates how self compacting concrete is valuable in making fast and solid concrete. How self compacting can enhance the sturdiness, quality and pace of development, what is the genuine capability of SCC tending to specialized/down to earth and temperate issues.

This paper presents some experimental investigation to characterize the fresh and mechanical properties of self-compacting concrete (SCC). The effect of concrete mix proportions on the main parameters of fresh SCC is studied.

International Journal of ChemTech Research, 2017

This paper gives a review on Self Compacting Concrete (SCC) to be made using various Mineral Admixtures and Fibers. In current scenario of construction industries due to demand in the construction of large and complex structures, which often leads to difficult concreting conditions. When large quantity of heavy reinforcement is to be placed in a reinforced concrete (RC) member, it is difficult to ensure fully compacted without voids or honeycombs. Compaction by manual or by mechanical vibraators is very difficult in this situation. That leads to the invention of new type of concrete named as self-compacting concrete (SCC). This type of concrete flows easily around the reinforcement and into all corners of the formwork. Self-compacting concrete describes a concerete with the ability to compact itself only by means of its own weight without the requirement of vibration. Self-copacting concrete also known as Self-consolidating Concrete or Self Compacting High Performance Concrete. It is very fluid and can pass around abstructions and fill all the nooks and corners without the risk of either mortar or other ingredients of concrete separating out, at the same time there are no entrapped air or rock pockets. This type of concrete mixture does not require any compaction and is saves time, labour and energy. This review paper explains the utilizationof fibers and various mineral admixtures in the properties of Self Compacting Compacting Concrete.

Cement and Concrete Research, 2001

An experimental and numerical study on mechanical properties, such as strength, elastic modulus, creep and shrinkage, of selfcompacting concrete (SCC) and the corresponding properties of normal compacting concrete (NC) is outlined in this article. The study included eight mix proportions of sealed or air-cured specimens with water ± binder ratio (w/b) varying between 0.24 and 0.80. Half of the mixes studied were based on NC. The age at loading of the concretes in the creep studies varied between 2 and 90 days. Four different stress to strength levels were studied. Parallel studies were performed on strength (f c) and relative humidity (RH). The results show that elastic modulus, creep and shrinkage of SCC did not differ significantly from the corresponding properties of NC. The ongoing study was started in 1997.