International Journal of Recent Technology and Engineering (IJRTE), 2019
In the present study, high strength high volume fly ash concrete of M70 grade is developed and it... more In the present study, high strength high volume fly ash concrete of M70 grade is developed and its durability properties such as water absorption capacity, porosity, and sorptivityare ascertained. It was found that high volume fly ash does not yield high strength so silica fume is added for early strength gain and for later strength gain lime required for complete pozzolonic action is added to achieve high performance concrete. In this study after testing for various combinations of quaternary blended concrete it was reported that 30% cement +70% fly ash as total powder achieves high strength of nearly 70 MPa, when silica fume of 10% by weight of powder and 30% of lime by weight of powder are added to the total powder content. The high strength high volume concrete developed with this optimum quantities of quaternary blends will be evaluated for the performance.It was found that water absorbtion in high strength high volume fly ash concrete reduced by nearly 85% and porosity is redu...
In this paper, a mathematical model for predicting the stress –strain and moment curvature relati... more In this paper, a mathematical model for predicting the stress –strain and moment curvature relations in concrete is developed. A good number of empirical equations were proposed to represent stress-strain behaviour of conventional concrete. Most of the equations can be used for the ascending portion of the curve only. In 1997 Mansur et al. have adopted Carriera and Chu (1985) model, which was based on the model proposed by Popovics (1973). As such, model proposed by Mansur et al includes both ascending and descending portions of the stress-strain curve for the confined concrete with introduction of two constants for the descending portion of the curve. Several researchers proposed various empirical equations for stress-strain behaviour as briefly reported in the previous chapter. An attempt has been made in this study to develop mathematical models for concrete in unconfined state. These analytical equations can be applied to any concrete with slight modifications. These models are ...
Fibre Reinforced Self Compacting Concrete(FRSCC) is emerging as improved structural material with... more Fibre Reinforced Self Compacting Concrete(FRSCC) is emerging as improved structural material with enhanced mechanical properties of higher Young’s modulus, increased compressive strength, crack resistance and durability. The present studies are aimed at understanding the effect of mechanical strength properties of FRSCC using glass fibres. In this study anti-crack high dispersion glass fibres with aspect ratio of 857 are used in M30 grade Self Compacting Concrete (SCC) with a dosage of 0.60kg/m3. The stress-strain behaviour of Glass Fibre Reinforced Self Compacting Concrete (GFRSCC) was investigated on standard cylinders of 150mm x 300 mm and mathematical models in the form of polynomial equations were developed. Subsequently, wall panels of 1500mm x 1000 mm size with 75mm thick(t) were cast with the same mix as investigated for mechanical properties. The wall panels were tested under vertical compressive load with minimum eccentricity with top and bottom edges fixed until failure. ...
International Journal of Recent Technology and Engineering (IJRTE), 2019
In the present study, high strength high volume fly ash concrete of M70 grade is developed and it... more In the present study, high strength high volume fly ash concrete of M70 grade is developed and its durability properties such as water absorption capacity, porosity, and sorptivityare ascertained. It was found that high volume fly ash does not yield high strength so silica fume is added for early strength gain and for later strength gain lime required for complete pozzolonic action is added to achieve high performance concrete. In this study after testing for various combinations of quaternary blended concrete it was reported that 30% cement +70% fly ash as total powder achieves high strength of nearly 70 MPa, when silica fume of 10% by weight of powder and 30% of lime by weight of powder are added to the total powder content. The high strength high volume concrete developed with this optimum quantities of quaternary blends will be evaluated for the performance.It was found that water absorbtion in high strength high volume fly ash concrete reduced by nearly 85% and porosity is redu...
In this paper, a mathematical model for predicting the stress –strain and moment curvature relati... more In this paper, a mathematical model for predicting the stress –strain and moment curvature relations in concrete is developed. A good number of empirical equations were proposed to represent stress-strain behaviour of conventional concrete. Most of the equations can be used for the ascending portion of the curve only. In 1997 Mansur et al. have adopted Carriera and Chu (1985) model, which was based on the model proposed by Popovics (1973). As such, model proposed by Mansur et al includes both ascending and descending portions of the stress-strain curve for the confined concrete with introduction of two constants for the descending portion of the curve. Several researchers proposed various empirical equations for stress-strain behaviour as briefly reported in the previous chapter. An attempt has been made in this study to develop mathematical models for concrete in unconfined state. These analytical equations can be applied to any concrete with slight modifications. These models are ...
Fibre Reinforced Self Compacting Concrete(FRSCC) is emerging as improved structural material with... more Fibre Reinforced Self Compacting Concrete(FRSCC) is emerging as improved structural material with enhanced mechanical properties of higher Young’s modulus, increased compressive strength, crack resistance and durability. The present studies are aimed at understanding the effect of mechanical strength properties of FRSCC using glass fibres. In this study anti-crack high dispersion glass fibres with aspect ratio of 857 are used in M30 grade Self Compacting Concrete (SCC) with a dosage of 0.60kg/m3. The stress-strain behaviour of Glass Fibre Reinforced Self Compacting Concrete (GFRSCC) was investigated on standard cylinders of 150mm x 300 mm and mathematical models in the form of polynomial equations were developed. Subsequently, wall panels of 1500mm x 1000 mm size with 75mm thick(t) were cast with the same mix as investigated for mechanical properties. The wall panels were tested under vertical compressive load with minimum eccentricity with top and bottom edges fixed until failure. ...
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