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Bendable Concrete 13 Running Head: Polyvinyl Alcohol in Creating a Bendable Concrete

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Added on  2021-05-30

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BENDABLE CONCRETE (Conducted 2017) 13 Running Head: BENDABLE CONCRETE 1 Using Polyvinyl Alcohol in Creating a Bendable Concrete Student’s Name Institution Project summary Bendable concrete is a mortar based easily moulded composite which is reinforced with especially random short fibres. The flexural strength and compressive strength of slabs and cubes of two different thicknesses are obtained with the bendability features of the concrete observed during the test on the flexural strength.

Bendable Concrete 13 Running Head: Polyvinyl Alcohol in Creating a Bendable Concrete

   Added on 2021-05-30

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Running Head: BENDABLE CONCRETE1Using Polyvinyl Alcohol in Creating a Bendable ConcreteStudent’s NameInstitution
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BENDABLE CONCRETE2Project summaryBendable concrete is a mortar based easily moulded composite which is reinforced with especially random short fibres. The traditional concrete faces disastrous failure due to routine overuse or strained in an earthquake whereas the bendable concrete remains safe and intact for up to 5% tensile strains. Traditional concrete may not be able to withstand a load of a tensile strain of 0.01%. To overcome future concrete demand and to design fibre materials inthis article, the Polyvinyl Alcohol fibre is applied so as to minimize the content of the cementand for flexibility enhancement. It has an ultimate high tensile strength, the aspect ratio is high, good water affinity, elasticity modulus which is relatively high, good compatibility of chemicals with the Portland cement and has no risks to health. For concrete workability increase, superplasticizer is used. The flexural strength and compressive strength of slabs andcubes of two different thicknesses are obtained with the bendability features of the concrete observed during the test on the flexural strength.Keywords: engineered Cementitious Cement, superplasticizer, self-curing.
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BENDABLE CONCRETE3IntroductionBackground Normal concretes almost do not bend having a 0.1% strain capacity which makes them rigid and highly brittle. The featured lack of bendability is the main reason for failure under strain and this factor has pushed for an elegant development of a material known as Engineered Cementitious Composites as well as bendable concrete. The material has the ability to considerably exhibit an improved flexibility. Bendable concrete is reinforced with polymer fibres which are designed micro-chemically whereas Engineered Cementitious Composites is obtained from similar ingredients that are as basic as those of normal concrete. However, it has High Range Water Reducing agents added to it for the purpose of imparting better workability. In ECC, there is no use of coarse aggregates, therefore it is a mortar and not concrete. The amount of Engineered Cementitious Composites powder is high, relatively. Cementitious materials for example fumes of silica, fly ash, blast-furnace slag among others may be added to cement so as to increase the amount of the paste. Engineered Cementitious Composites typically uses 2% of discontinuous short fibres. Engineered Cementitious Composites incorporates silica sand which is very fine and Poly Vinyl Alcohol fibres that covered with a coating of very thin silk. This coating of the surface enables the fibre to begin slipping during over-loading which prevents fracturing.
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BENDABLE CONCRETE4Literature Review[ CITATION Sey18 \l 1033 ]Conducted a study on synthetic fibres and steel, both available commercially. Deflection and flexural stress relationships have been applied to determine flexural toughness, flexural strength, equivalent flexural strength ratio and equivalent flexuralstrength. The concrete’s flexural toughness was discovered to be averagely increasing upon the usage of synthetic fibres and steel, however, different fibres of equal dosages did not lead to specimens with similar flexural toughness.[ CITATION Rec17 \l 1033 ]Conducted an investigation study on the flexural behaviour on concrete that self-compacts reinforced with hooked-end and straight steel fibres at 0.5%, 1.0% and 1.5% levels compared to Normally Vibrated Concrete. The tests from the laboratory were determined as per RILEM TC 162-TDF recommendation. The flexural behaviour of SCC appeared comparably similar as Normally Vibrated Concrete, where an increase in the volume ration of fibres led to an increase in post-peak and pre-peak SCC parameters. The type of steel fibres nevertheless, greatly influences this dependency. However, the SCC gains maximum displacement in its crack mouth for lesser deflections as compared to Normally Vibrated Concrete.[ CITATION Wei17 \l 1033 ]carried out a study to experiment on the probable applications of the Engineered Cementitious Composites reinforced with fibres with less drying shrinkage characteristics in pavements of the concrete with the aim of joint elimination that is used normally to accommodate deformation of shrinkage and temperature. It was realized that composite slab having both normal concrete and LSECC with bars of steel at the interface of concrete/ LSECC and designed procedures of construction was able to localize the tensile cracks into the strip LSECC instead of fracturing in the nearest concrete slab[ CITATION Vik17 \l 1033 ].
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