Studies on Strengthening of High Performance Self Compacting Concrete

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Available online: https://edupediapublications.org/journals/index.php/IJR/ P a g e | 4805

Studies on Strengthening of High Performance Self

Compacting Concrete

1G.Vijay, 2D.vinay Kumar, 3R.sahithi, 4N.satya shiva Prasad

Assistant Professor, Balaji institute of technology and science

Abstract:

Self Compacting Concrete (SCC) has more consideration in light of its capacity to minimal without the need of interior or outside vibration. The setting of typical traditional cement is troublesome in fortification restriction places and furthermore the quality of the solid is low when it is subjected to extreme introduction condition. With a specific end goal to defeat these impacts the admixtures were utilized as a part of the solid to build the quality and tough properties of the solid. Self-Compacting Concrete (SCC) is one of the solid which makes utilization of admixture to build the stream capacity of the solid with no extra vibration. As the solid is flowable, it has great workability. SCC has greater workability and by the expansion of mineral admixture like flyash and silica rage, the solid will achieve more quality and tough, with the goal that the solid will act as Self Compacting High Performance Concrete (SCHPC).The point of the examination is to decide the flexural conduct of the self-compacting superior cement. In this present work the different literary works identified with SCC with various mineral admixtures was considered also, the best among them was picked for the future work

Keywords: - Self Compacting Concrete, Fly ash,

Silica fume, Super plasticizer, Viscosity Modifying Admixture

1. INTRODUCTION

Self-Compacting Concrete (SCC) is a streaming solid blend that can combine under its own

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Available online: https://edupediapublications.org/journals/index.php/IJR/ P a g e | 4806 (VMA), and receptive Mineral Admixtures

(MA), e.g. Silica Fume (SF), are utilized. The execution of SCHPC is very enhanced by utilizing SF anyway it is costly because of the restricted accessibility particularly in creating nations. Blend extents for SCC vary from those of normal cement, in that the previous has more powder content and less coarse total. The High Range Water Reducing Admixture (HRWRA) helps in accomplishing fantastic stream at low water substance and VMA lessens draining and enhances the security of the solid blend. A compelling VMA can likewise cut down the powder necessity and still give the required dependability. Besides, SCHPC quite often incorporates a mineral admixture, to upgrade the deformability and stability of concrete.

2. ADVANTAGES OF SCHPC

Self-Compacting High performance Concrete possess various numbers of advantages because of its fluidity nature .Some of the advantages are listed below.

1. Improved quality of concrete and reduction of onsite repairs

2. Faster construction times

3. Improvement of health and safety is also achieved through elimination of handling of vibrators

4. Possibilities for utilization of dusts, which are currently waste products and which are costly to dispose of.

5. Ease of placement results in cost savings

through reduced equipment and labor

requirement.

3. LITERATURE REVIEW

The influence of cement and sweeping added substance sorts in the execution of self-pushing and self-compacting cements for auxiliary components was examined. The impact of various parameters was assessed by the expansion of far reaching added substances which comes about is compressive quality decrease. It was watched that the decrease in compressive quality was principally because of the aggregate development of concrete which relies upon alumina and sulfate substance of bond. The expansion of added substances advanced expanded estimations of droop for comparative w/c proportion and super plasticizer content. (Carballosa et al. 2015) The impact of antifoaming admixture on High-Performance Self-Compacting Concrete was featured. The impact of the admixture sort on pore measure dispersion, compressive quality and ice protection of HPSCC at consistent water to concrete proportion, sort and volume of total, and volume of bond glue was analyzed. The outcomes demonstrated that admixtures impact the properties of HPSCC and alteration of against frothing specialist impact impacts the air substance and workability of HPSCC. (Beata. 2015)

The physico-mechanical properties of superior solid utilizing distinctive totals in nearness of silica rage was observed.Four diverse cement blends with a similar concrete substance and distinctive w/c proportions were planned utilizing typical dolomite total, air-cooled slag side-effect and two unique sorts of iron metal totals. Superior cement can be accomplished utilizing super plasticizer to decrease the water/bond proportion and physic-mechanical properties of coarse total and solidified cement was examined. The outcomes demonstrated that expansion of 10% silica smolder built up a more grounded concrete network. (Salah et al. 2014) The examination on the impact of example shape

on remaining mechanical properties of

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Available online: https://edupediapublications.org/journals/index.php/IJR/ P a g e | 4807 concrete (SCC) presented to raised temperatures

was talked about. Different sorts of filaments were utilized as a part of barrel shaped and cubical states of solid example and air cooling was done in the room temperature before testing. Warm stun prompted by round and hollow shape air cooling made more serious harm concrete with more prominent misfortunes in compressive quality than those with cubical shapes.(Arabi et al. 2014)

The impact of pressure lap join on the conduct of high quality self-compacted solid pillars was talked about. The impact of support bar distance across and proportion, join length and throwing position on the bar flexural conduct was watched. Extreme limit, avoidance, split example and method of disappointment have been recorded and test comes about demonstrated that the join length with various estimations of bar width indicated varieties in quality and had been contrasted and proposed values in the Egyptian code of practice.(Azab et al. 2014)

The conduct of self-compacting fiber

strengthened cement containing bond furnace tidy was explored. The impact of fortifying SCC with Polypropylene fiber was inspected. An examination was completed among the conduct of SCFRC blends, rigidity and shrinkage. Droop stream and L-box were performed and the outcomes demonstrated that shrinkage of SCC was decreased because of PPF incorporation. (Adam et al. 2014) The impacts of fly fiery debris and TiO2 nanoparticles on rheological, mechanical, miniaturized scale basic and warm properties of high quality self-compacting concrete has been contemplated. The different parameters, for example, Strength upgrade and sturdiness related

attributes were researched. It was discovered that the expansion of FA as a characteristic pozzolana can enhance the rheological, mechanical and solidness properties of cement at higher ages and

furthermore helped in sparing the vitality. (Mostafa et al. 2013) The strategies for restoration or reinforcing of these zones ought to be dependable, successful and efficient was foccused. The absolute most late issues and discoveries utilizing UHPFC as a repair material were examined. The superb repair and retrofit possibilities in compressive and flexure fortifying was acquired with Ultra High Performance Concrete (UHPFC) and it has high holding quality and bond sturdiness. (Bassam et al. 2013) The improvement of self-compacting solid utilizing contrast steady factorial outline was inspected. It was watched that if alteration of the four factors to be specific. bond content, water to powder proportion, fly fiery remains substance, and super plasticizer will expand the compressive quality of self-compacting concrete (SCC). It was reasoned that the cooperations of the parameters of a couple effectThe mechanical and crisp properties of high-quality self-compacting concrete containing class C fly powder was considered. A high quality self compacting concrete (HSSCC) blend of 100 MPa compressive quality was composed after the accessible rules for ordinary quality self-compacting concrete. It was discovered that with an identical w/b proportion, HSSCC grows

significantly higher compressive quality

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Available online: https://edupediapublications.org/journals/index.php/IJR/ P a g e | 4808 and Ponikiewski. 2013) the security properties

amongst fortification and high quality self-compacting concrete and in addition expectedly vibrated high quality cement was examined. The bar review, measurement, bond length, solid sort and their belongings were dictated by implies

of haul out tests and post-yield slip conduct of various steel solid sorts was resolved. The solid with various evaluations and distinction in pliability bars demonstrated width lessening because of hub pliable anxiety. This anxiety influenced their holding execution. (Ashtiani et al. 2013)

The superior self-compacting concrete altered by High-Calcium Fly fiery debris was contemplated. The bond was supplanted by High Calcium Fly fiery remains and it was likewise utilized as an added substance specialist to the solid. It was discovered that the crude calcium fly fiery remains indicated negative impact.

The different parameters, for example,

rheological properties, compressive quality and flexural quality tests have additionally been contemplated with varieties in HCFA as a substitution of bond in solid blend and the test outcomes demonstrated that there is no impact in change of fly powder fineness on properties goodness HPSCC blends. (Ponikiewski and Golaszewski 2013) The quality parameters of self-compacting concrete containing fly cinder and dolomite powder was examined. The concrete was supplanted by fly slag and dolomite powder in various rates. The seventh, 28th and 90th days compressive quality with water powder proportion of 0.33 was contemplated and different tests were led. The outcomes demonstrated that the utilization of fly fiery debris in self-compacting concrete diminished the draining and isolation and expanded the filling capacity of cement. The dolomite powder expanded the isolation protection of cement. It was general presumed that that the general

increment in workability happened when the fly cinder and dolomite powder were mixed well together. (Deepa and Paulose 2013)

The utilization of cloth filaments in fortified self-compacting concrete (SCC) was reviwed. Three roundabout thin segments were threw utilizing both plain and cloth fiber strengthened SCC to

decide the solidified properties and

mesostructural qualities along the segment statures. The different tests on crisp and solidified cement were conveyed. It was discovered that the expansion the workability of SCC was decreased because of the expansion of cloth strands and the solidified properties did not change altogether along the stature of the column.(Ahmed 2013) The self-compacting fiber strengthened cement in prestressed precast bars was inspected. The nine pre focused on I-light emissions spine measurements was utilized and shear assessment was broke down under various conditions. The strands go about as an extra support to stirrups and it was discovered that the Steel filaments control the presence of breaks as well as their proliferation .The splits made in concrete without steel strands were littler when contrasted with the solid with steel filaments. (Cuenca and Serna2013)

The superior composite cementitious frameworks were broke down. The compressive quality, elasticity, gas penetrability and fast chloride particle entrance was examined. The substitution of 8 to 12% SF by bond yielded the ideal quality, penetrability and chloride particle entrance esteem. The appropriateness of counterfeit neural system for the forecast of compressive quality, elasticity, gas porousness and chloride particle infiltration acquired utilizing simulated neural systems have a decent relationship between's the tentatively gotten values. (Mohammad Iqbal Khan 2012) The impact of various filaments on the remaining conduct and flexural strength of

self-compacting superior cement after

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Available online: https://edupediapublications.org/journals/index.php/IJR/ P a g e | 4809 The two sorts of strands to be specific smaller

scale polypropylene fiber and full scale steel fiber was utilized. The crossover fiber self-compacting elite cement demonstrated great mechanical properties when contrasted with

mono fiber strengthened self-compacting

superior cement. The small scale polypropylene fiber mitigates spalling yet did not indicate impact on mechanical properties. (Ding et al. 2012) The self compacting fiber strengthened solid pillars was investigated to decide its flexural exhaustion quality and disappointment likelihood. The steel strands were utilized as a part of various proportions in SCFRC shafts and different tests, for example, compressive quality and flexural quality tests were led. It was discovered that the of Portland cement concrete was adversely affected by accelerated curing. (Hooton and Titherington. 2004)

SUMMARY OF LITERATURES

The research articles published by various authors were discussed and it was concluded that most of the mineral admixtures such as fly ash, various types and sizes of fibers, silica fume and metakaolin were used in SCC in varying percentage to improve the strength of the concrete. It shows that the mineral admixture plays a significant role in increasing the performance of the concrete in various means. Among that silica fume and fly ash were considered as most efficient one. Hence silica fume and fly ash will be used in SCC for experimental investigation of RC beam.

CONCLUSION

This paper reviewed the existing research work on Self Compacting Concrete (SCC) with various types of admixtures. The SCC with different types of mineral and chemical admixtures possessed greater strength and

enhance good flow ability and workability. It also showed that the durability property of the SCC was also increased which helps in increasing the service life of concrete structures. From the literature it is evident that the use of Fly Ash and Silica fume will exhibit good characteristics in both fresh and hardened state of SCC.

REFERENCE

[1] Arabi N.S. Al Qadi , Sleiman M. Al-Zaidyeen (2014), “Effect of fibre content and specimen shape on residual strength of polypropylene fibre self-compacting concrete exposed to elevated temperatures”, Journal of King Saud University –Engineering Sciences, Vol. 26, pp. 33–39.

[2] Arabi N.S. Alqadi, Kamal Nasharuddin Bin Mustapha, SivakumarNaganathan, Qahir N.S. Al-Kadi (2013), “Development of self-compacting concrete using contrast constant factorial design”, Journal of King Saud University – Engineering Sciences, Vol. 25, pp. 105–112.

[3] Bassam A. Tayeha, B H Abu Bakarb, M A MegatJoharib and Yen Lei Vooc (2013), “Utilization of Ultra-High Performance Fibre Concrete (UHPFC) for Rehabilitation”, Procedia Engineering, Vol. 54, pp. 525 – 538.

[4] BeataLazniewska-Piekarczyk (2014),

“Influence of Antifoaming Admixture Type on Several Properties of High- Performance Self-Compacting Concrete”, Journal of Materials in Civil Engineering, pp. 1-11.

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Available online: https://edupediapublications.org/journals/index.php/IJR/ P a g e | 4810 [6] E. Cuenca, P. Serna (2013), “Shear behavior

of prestressed precast beams made of

self-compacting fiber reinforced concrete”,

Construction and Building Materials, Vol. 45, pp. 145–156

[7] Eva Vejmelkova, Milena Pavlikova, Martin Keppert, ZbynekKersner, PavlaRovnanikova, Michal Ondracek, Martin Sedlmajer, Robert C erny (2010), “High performance concrete with Czech metakaolin: Experimental analysis of

strength, toughness and durability

characteristics”, Construction and Building Materials, Vol. 24, pp. 1404–1411.

[8] Heba A. Mohamed (2011), “Effect of fly ash and silica fume on compressive strength of Self-compacting concrete under different curing conditions”, Ain Shams Engineering Journal, Vol. 2,pp. 79–86.

[9] M. Pajak T. Ponikiewski (2013), “Flexural behavior of self-compacting concrete reinforced with different types of steel fibers”, Construction and Building Materials, Vol. 47, pp. 397–408

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