Experimental studies on m35 grade self compacting concrete. P,india is used as additives according to astm c 618 5. Approaches to mix design and measurement of workability for self compacting concrete josef petrus jooste a dissertation submitted to the faculty of engineering and the built environment, university of the witwatersrand, in fulfillment of the requirements of the degree of master of science in engineering. Self compacting concrete scc mix design must involve key practices to achieve the requirements of quality and durable mix.
It can also be used in areas with normal and congested reinforcement, with aggregates as large as 2 inches. The selfcompacted concrete can be explained as an innovative product in civil engineering discipline in india. Self consolidating concrete mix self consolidating concrete scc is a highly fluid mixture designed to flow and consolidate under its own weight. Generally the three major characteristics of concrete are workability, strength, and durability. A simple mix design method for selfcompacting concrete. High segregation resistance of mortar and concrete. M40 grade stands for its a mix of concrete with a characteristic compressive strength of 40 nmm2. Nansu method of mix design for self compacting concrete. A practical mix design method for selfcompacting concrete. Scc looks very different from conventional concrete while mixing.
Self compacting concrete scc developed by professor hajime okamuraof kochi university of technology, japan, in1986 during his research, okamura found that the main cause of the poor durability performances of japanese concrete in structures was the inadequate compacting of the concrete in the casting operations. In this present experimental work a simple use mix design procedure is. The main aim of the concrete mix design is to find out the desired proportion of each ingredients which are cement, coarse aggregate, fine aggregate, water etc. Experimental investigation of m40 grade on self compacting. M40 represents a mix of concrete which is designed to attain a strength of 40mpa or 40nsq mm on 28th day from casting. Self consolidating concrete scc, also referred to as self compacting concrete, is able to flow and consolidate on its own. The mix design procedure for m40 grade concrete as per. Selfcompacting concrete scc provides a solution to these.
M40 grade stands for its a mix of concrete with a characteristic compressive strength of 40 nmm 2. An illustrative example m20, m25, m30, m40 grade concrete concrete mix design is a procedure of selecting the suitable ingredients of concrete and their relative proportions with an objective to prepare concrete of certain minimum strength, desired workability and durability as economically value engineered. Selfcompacting concrete scc for prestressed bridge girders. Scc results in durable concrete structures, and saves labour and consolidation noise. Abstract self compacting concrete scc is a high performance concrete that can flow under its own weight to completely fill the form work and self. May 26, 2017 normally concrete mix design is based on is. The authors have carried out pioneer work that has led to similar works in many other regions and which had found applications in many areas. The mix design m50 grade using admixture sikament provided here is for reference purpose only. 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 fresh properties of scc were satisfied once 400th of 20mm and 60 minutes of 12mm size of.
The advantages of concrete mix design are as follows. It uses super plasticisers and stabilizers to significantly increase the ease and rate of flow. Therefore, a mix design procedure to get the proportion of the ingredients in the scc is not standardized. Self consolidating concrete, or scc, is a chemically altered concrete product, manipulated to set itself. The mixture is very cohesive and is capable of filling all types of spaces without segregation or bleeding.
As there is no indian code available for self compacting concrete mix design, it is designed based on efnarc specifications. It was developed by varying percentages of fibres from 0. Traditionally, concrete with the fluidity of scc has had a very high watertocement ratio, which would lower compressive strengths and compromise. P, india abstract the self compacted concrete is an innovative product in civil engineering field of india. Selfcompacted concrete mix design and its comparison with conventional concrete m 40 rakesh kumar d department of structural engineering, integral university, lucknow, u. Self compacting concrete testing of all fresh properties duration. Tech student,civil engineering department, brcm college rohtak, haryana, india 2 assistant professor, civil engineering department, bit meerut, uttar pradesh, india abstract self compacting concrete scc was first.
Performance of glass fibre reinforced self compacting. First, the amount of aggregates required is determined, and the paste of binders is then filled into the voids of aggregates to ensure that the concrete thus obtained has flowability, self compacting ability and other desired scc properties. In this study, mix designing was carried out for m40 grade concrete, and the procedure is based on the method proposed by nan su et al. Dave anderson of cretex companies on scc mix design, as well as the contribution of materials, labor, the use of prestressing beds, and the use of the storage area at the elk river. Actual site conditions vary and thus this should be adjusted as per the location and other factors.
Selfcompacting concrete procedure for mix design paratibha aggarwal, rafat siddique, yogesh aggarwal, surinder m gupta figure 2. P, india abstract the selfcompacted concrete is an innovative product in civil engineering field of india. From the present study the test result showed that for fresh concrete all the. Selfcompacting concrete procedure for mix design article pdf available in leonardo electronic journal of practices and technologies 712 june 2008 with 35,326 reads how we measure reads. Initially the waterpowder ratio for zero flow 29 3. The mix design procedure for m40 grade concrete as per aci method is discussed. M40 means fck 40mpa its charecterstic strength of concrete for specified mix design. Introduction self compacting concrete scc is a new category of high performance concrete characterized by. This specification and guideline utilises efnarcs broad practical experience with scc to provide a framework for design and use of high quality scc. Opc 53 grade conforming is 12269 c maximum nominal size of aggregate. Self consolidating concrete concrete information, design. Mix proportions for m40 and m60 grade of selfcompacting concrete were developed victimization nan su methodology of mix design that satisfied the fresh properties of scc as per efnarc specifications. Selfcompacting concrete applications and advantages.
Performance of glass fibre reinforced self compacting concrete. Table 6 shows the mix proportions used in the present work. Mix proportioning for a concrete of m40 grade is given in ai to all. In 2011, b mahalingam et al carried out an experimental work on scc using fly ash as partial. Mix design for self compacting concrete is given as below. Opc cement 53 grade 290 kg ggbs 260 kg water cement ratio wc 0. A simple mix design methods for self compacting concrete. Self compacting concrete mix design for m30 kshama shukla1, akansha tiwari2 1 m. Self compacting concrete testing of all fresh properties. Experimental study on fiber reinforced self compacting concrete. 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. Using new admixtures and some mix modifications, we can now produce concrete that flows easily without segregating where the coarse aggregate separates from the cement paste. 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.
The behaviour of self compacting concrete with waste. A total of 8 numbers of column specimens have to be tested in this experimental investigation. Jun 17, 2019 the concrete mix of scc must be placed at a relatively higher velocity than that of regular concrete. The utilisation of selfcompacting concrete scc is growing rapidly. Selfcompacting concrete procedure for mix design from. Nov 19, 2018 disadvantages this type of concrete involves more economy compared to normal concrete. Tech student,civil engineering department, brcm college rohtak, haryana, india 2 assistant professor, civil engineering department, bit meerut, uttar pradesh, india abstract self compacting concrete. P, india abstract the self compacted concrete is an innovative product in civil engineering field of. Compacting factor weight of partially compacted concrete weight of fully compacted concrete 2.
First, the amount of aggregate required was determined, and the paste of binder was then filled into the void of. The mix designed as per the requirements are tested before using it in construction. The basic properties to be achieved by an scc mix is flowability, passing ability, strength, and segregation resistance. Self compacted concrete mix design and its comparison with conventional concrete m40 rakesh kumar d department of structural engineering, integral university, lucknow, u. When cubes are casted and after 28days the same are tested, and as all we know that concrete is hetrogenous material where we cant assure the sa. Self compacting concrete scc for prestressed bridge girders 7. Best practices guidelines for selfconsolidating concrete. 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. The utilisation of self compacting concrete scc is growing rapidly. The efnarc specification efnarc 2002 defines specific requirements for the scc material, its composition and its application. 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. Actual site conditions vary and thus this should be adjusted a.
Detailed study of mix design of self compacted concrete. Comparison of scc over nc ingredients normal concrete selfcompacting concrete. As no specific mix design procedures for scc are available mix design can be done with. The main purpose of the use of self compacting concrete is to get flow of concrete without segregation. M40 grade concrete mix design as per aci method the constructor. Mechanism of achieving self compaction 5 reduction of water. Compacted concrete, construction website, mix design of concrete. The cube strengths are tested on 7 and 28 days as a strength. Mix design requirements for self compacting concretescc.
Kumar 2006 reported the history of scc development and its basic principle, different testing methods to test highflowability, resistance against segregation, and passing ability. Investigations for establishing a rational mix design method and self compactability testing methods have been carried out from the viewpoint of making self compacting concrete a standard concrete. Aug 21, 2018 friends we use different concrete for different purposes. Normal concrete was created by utilizing is method and selfcompacting concrete was created with a simple mix design suggested by nan su. Self compacting concrete has been placed at heights taller than 5 meters without aggregate segregation. Best practices guidelines for self consolidating concrete 3 what is self consolidating concrete. Feb, 2014 mod01 lec21 self compacting concrete nptelhrd. Due to low watercement ratio, plastic shrinkage cracks may occur. Today, advances in admixtures and mix proportioning are making self consolidating concrete or scc a practical reality around the world. Experimental investigation on selfcuring selfcompacting. This paper proposes a new mix design method for self compacting concrete scc.
Selfcompacting concrete advanced concrete technology. Selfcompacted concrete mix design and its comparison. Concrete mix design for m30 grade for self compacting concrete concrete mix design for m30 grade concrete with ggbs for self compacting application is as follows. Pdf selfcompacting concrete procedure for mix design. Mix proportions were arrived for m20, m30, conventional m40 and m40self compacting concrete. Concrete producers must retrain their eyes for this very fluid mixture as it turns corners and fills forms. Mix details for self compacting concrete of m40 grade concrete. Self compacted concrete mix design and its comparison with conventional concrete m 40 rakesh kumar d department of structural engineering, integral university, lucknow, u. The specimens are of size mm diameter and 750mm in height. Dec 24, 2017 concrete mix design for m30 grade for self compacting concrete concrete mix design for m30 grade concrete with ggbs for self compacting application is as follows.
Mix design of self consolidating concretes exercise 8 exercise 8. In this study fresh property and hardened properties of the different mixes of concrete were determined. In 1988, self compacting concrete scc a highfl uidity concrete that maintains its stability was developed in japan. Conclusions based on the investigation conducted for the study of behavior of self compacting concrete the following conclusions are arrived. The selfcompacted concrete is an innovative product in civil engineering field of india. Mix proportions for m40 and m60 grade of self compacting concrete were developed victimization nan su methodology of mix design that satisfied the fresh properties of scc as per efnarc specifications. Concrete mix design for m30 grade for self compacting.
Self compacting concrete offers a rapid rate of concrete placement, with faster construction times and. The concrete community of various european countries intensely researches its application and implements experiences. Experimental studies on m30 grade self compacting concrete. There is no specific indian standards codal provision for mix design of self compacting 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 formwork and encapsulate the reinforcement without any mechanical consolidation. It can be used in precast applications or for concrete placed on site.
The european guidelines for self compacting concrete 3 nan su, kungchung hsu, hiswen chai. Self compacting concrete an overview sciencedirect topics. At the same time it is cohesive enough to fill spaces of almost any size and shape without segregation or bleeding. Self consolidating concrete scc is recognized as one of the greatest advances in the concrete industry. Mix design to achieve the aim in the present work, efnarc method is adopted 7 to design concrete mix of strength of m40. The mix design m 40 grade for pier using admixture fosroc provided here is for reference purpose only. In 2011, b mahalingam et al carried out an experimental work on scc using fly ash as partial replacement material for cement, at replacement levels of 30%, 40% and 50% respectively and also using suitable super plasticizer. Abstracta self compacting concrete concrete scc is the one that can be placed in the form and can go through obstruction by its own weight and without the need of vibration. Jul 09, 2018 self compacting concrete scc is a flowing concrete that does not require vibration and, indeed, should not be vibrated. No method specifies the grade of concrete in scc, except the nan su et al. 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. To investigate the fresh and hardened properties of self compacting concrete with and without glass fibres. However, even nowadays, there is still a lack of knowledge about scc, especially regarding the few practical mix design methods.
The strength based mix proportion of scc was arrived based on nansu method of mix design for m40 grade plastic fibre reinforced self compacting concrete. Study of mix design of self compacting concrete irjet. Highly skilled and experienced workers are required for the production of scc. Selfcompacting concrete is a fluid mixture, which is suitable for placing in difficult conditions and in. 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. A simple mix design method for self compacting concrete. High deformability of mortar and concrete self compacting concrete. Self compacting concrete with recycled coarse aggregates. As per is4562000 6, cement is replaced by weight of material.