The Experts below are selected from a list of 4152 Experts worldwide ranked by ideXlab platform
Haifu Wang - One of the best experts on this subject based on the ideXlab platform.
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freeze Thaw Resistance of alkali slag concrete based on response surface methodology
Construction and Building Materials, 2013Co-Authors: Liangcai Cai, Haifu WangAbstract:Abstract Alkali–slag concrete (ASC), with the frost resistant grade of above F300 and frost resistant coefficient D F of about 90%, is prepared using slag and composite activator composed of Na 2 SiO 3 and NaOH. Response surface methodology (RSM) is applied to study the freeze–Thaw Resistance of ASC. The effects of activator solution–slag ratio (A/S), slag content and sand ratio on the freeze–Thaw Resistance are analyzed using the softwares of Design Expert and Box-Benhnken Design (BBD). Models are established for D F and the influence of air-void structure of hard concrete on the freeze–Thaw Resistance, respectively. The result shows that the D F model coincides well with the test results and can be used to analyze and predict the freeze–Thaw Resistance of ASC. The influence on the freeze–Thaw Resistance from high to low is A/S, slag content and sand ratio. The interaction of A/S and slag content is the most prominent and air-void structure is the crucial factor. The air bubble space coefficient and its specific surface area have good correlation with D F . The freeze–Thaw Resistance tends to better with smaller air bubble space coefficient and bigger specific surface area.
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Freeze–Thaw Resistance of alkali–slag concrete based on response surface methodology
Construction and Building Materials, 2013Co-Authors: Liangcai Cai, Haifu WangAbstract:Abstract Alkali–slag concrete (ASC), with the frost resistant grade of above F300 and frost resistant coefficient D F of about 90%, is prepared using slag and composite activator composed of Na 2 SiO 3 and NaOH. Response surface methodology (RSM) is applied to study the freeze–Thaw Resistance of ASC. The effects of activator solution–slag ratio (A/S), slag content and sand ratio on the freeze–Thaw Resistance are analyzed using the softwares of Design Expert and Box-Benhnken Design (BBD). Models are established for D F and the influence of air-void structure of hard concrete on the freeze–Thaw Resistance, respectively. The result shows that the D F model coincides well with the test results and can be used to analyze and predict the freeze–Thaw Resistance of ASC. The influence on the freeze–Thaw Resistance from high to low is A/S, slag content and sand ratio. The interaction of A/S and slag content is the most prominent and air-void structure is the crucial factor. The air bubble space coefficient and its specific surface area have good correlation with D F . The freeze–Thaw Resistance tends to better with smaller air bubble space coefficient and bigger specific surface area.
Liangcai Cai - One of the best experts on this subject based on the ideXlab platform.
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freeze Thaw Resistance of alkali slag concrete based on response surface methodology
Construction and Building Materials, 2013Co-Authors: Liangcai Cai, Haifu WangAbstract:Abstract Alkali–slag concrete (ASC), with the frost resistant grade of above F300 and frost resistant coefficient D F of about 90%, is prepared using slag and composite activator composed of Na 2 SiO 3 and NaOH. Response surface methodology (RSM) is applied to study the freeze–Thaw Resistance of ASC. The effects of activator solution–slag ratio (A/S), slag content and sand ratio on the freeze–Thaw Resistance are analyzed using the softwares of Design Expert and Box-Benhnken Design (BBD). Models are established for D F and the influence of air-void structure of hard concrete on the freeze–Thaw Resistance, respectively. The result shows that the D F model coincides well with the test results and can be used to analyze and predict the freeze–Thaw Resistance of ASC. The influence on the freeze–Thaw Resistance from high to low is A/S, slag content and sand ratio. The interaction of A/S and slag content is the most prominent and air-void structure is the crucial factor. The air bubble space coefficient and its specific surface area have good correlation with D F . The freeze–Thaw Resistance tends to better with smaller air bubble space coefficient and bigger specific surface area.
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Freeze–Thaw Resistance of alkali–slag concrete based on response surface methodology
Construction and Building Materials, 2013Co-Authors: Liangcai Cai, Haifu WangAbstract:Abstract Alkali–slag concrete (ASC), with the frost resistant grade of above F300 and frost resistant coefficient D F of about 90%, is prepared using slag and composite activator composed of Na 2 SiO 3 and NaOH. Response surface methodology (RSM) is applied to study the freeze–Thaw Resistance of ASC. The effects of activator solution–slag ratio (A/S), slag content and sand ratio on the freeze–Thaw Resistance are analyzed using the softwares of Design Expert and Box-Benhnken Design (BBD). Models are established for D F and the influence of air-void structure of hard concrete on the freeze–Thaw Resistance, respectively. The result shows that the D F model coincides well with the test results and can be used to analyze and predict the freeze–Thaw Resistance of ASC. The influence on the freeze–Thaw Resistance from high to low is A/S, slag content and sand ratio. The interaction of A/S and slag content is the most prominent and air-void structure is the crucial factor. The air bubble space coefficient and its specific surface area have good correlation with D F . The freeze–Thaw Resistance tends to better with smaller air bubble space coefficient and bigger specific surface area.
Xiaosa Yuan - One of the best experts on this subject based on the ideXlab platform.
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experimental investigation on the freeze Thaw Resistance of steel fibers reinforced rubber concrete
Materials, 2020Co-Authors: Tao Luo, Chi Zhang, Chaowei Sun, Xinchao Zheng, Xiaosa YuanAbstract:The reuse of rubber in concrete results in two major opposing effects: an enhancement in durability and a reduction in mechanical strength. In order to strengthen the mechanical properties of rubber concrete, steel fibers were added in this research. The compressive strength, the four-point bending strength, the mass loss rate, and the relative dynamic elastic modulus of steel fiber reinforced rubber concrete, subjected to cyclic freezing and Thawing, were tested. The effects of the content of steel fibers on the freeze–Thaw Resistance are discussed. The microstructure damage was captured and analyzed by Industrial Computed Tomography (ICT) scanning. Results show that the addition of 2.0% steel fibers can increase the compressive strength of rubber concrete by 26.6% if there is no freeze–Thaw effect, but the strengthening effect disappears when subjected to cyclic freeze–Thaw. The enhancement of steel fibers on the four-point bending strength is effective under cyclic freeze–Thaw. The effect of steel fibers is positive on the mass loss rate but negative on the relative dynamic elastic modulus.
Shanshan Jin - One of the best experts on this subject based on the ideXlab platform.
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Fractal analysis of effect of air void on freeze–Thaw Resistance of concrete
Construction and Building Materials, 2013Co-Authors: Shanshan Jin, Jin Xi Zhang, Baoshan HuangAbstract:Pore structure is one of the major characteristics influencing the freeze–Thaw Resistance of concrete. Although the air-void spacing factor associated to the porosity features of concrete is known as a widely used parameter to assess the freeze–Thaw Resistance, controversies on the determination of critical values of air-void spacing factor still exist in many related studies. Moreover, it is reported that the pore-size distribution in concrete also significantly affects its freeze–Thaw Resistance. In this study, a fractal model was established to characterize the air voids size-distribution in concrete, and the corresponding fractal dimension obtained from the fractal model was validated for its effectiveness in describing the air voids size-distribution quantitatively. By comparison to a fractal model presented in a previous study, the fractal model proposed in this study was found more reasonable and reliable. Based on the theoretical principle, correlations between air voids size-distributions and the measured freeze–Thaw Resistances of concrete were established through laboratory experiments. The results revealed that air voids size-distribution exhibited more significant influence on the freeze–Thaw Resistance of concrete than the air-void spacing. Furthermore, a regression equation with fairly high correlation coefficient between the fractal dimension of air voids size-distribution and the durability factors of concrete was obtained from the results.
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fractal analysis of effect of air void on freeze Thaw Resistance of concrete
Construction and Building Materials, 2013Co-Authors: Shanshan Jin, Jin Xi Zhang, Baoshan HuangAbstract:Pore structure is one of the major characteristics influencing the freeze–Thaw Resistance of concrete. Although the air-void spacing factor associated to the porosity features of concrete is known as a widely used parameter to assess the freeze–Thaw Resistance, controversies on the determination of critical values of air-void spacing factor still exist in many related studies. Moreover, it is reported that the pore-size distribution in concrete also significantly affects its freeze–Thaw Resistance. In this study, a fractal model was established to characterize the air voids size-distribution in concrete, and the corresponding fractal dimension obtained from the fractal model was validated for its effectiveness in describing the air voids size-distribution quantitatively. By comparison to a fractal model presented in a previous study, the fractal model proposed in this study was found more reasonable and reliable. Based on the theoretical principle, correlations between air voids size-distributions and the measured freeze–Thaw Resistances of concrete were established through laboratory experiments. The results revealed that air voids size-distribution exhibited more significant influence on the freeze–Thaw Resistance of concrete than the air-void spacing. Furthermore, a regression equation with fairly high correlation coefficient between the fractal dimension of air voids size-distribution and the durability factors of concrete was obtained from the results.
Baoshan Huang - One of the best experts on this subject based on the ideXlab platform.
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Fractal analysis of effect of air void on freeze–Thaw Resistance of concrete
Construction and Building Materials, 2013Co-Authors: Shanshan Jin, Jin Xi Zhang, Baoshan HuangAbstract:Pore structure is one of the major characteristics influencing the freeze–Thaw Resistance of concrete. Although the air-void spacing factor associated to the porosity features of concrete is known as a widely used parameter to assess the freeze–Thaw Resistance, controversies on the determination of critical values of air-void spacing factor still exist in many related studies. Moreover, it is reported that the pore-size distribution in concrete also significantly affects its freeze–Thaw Resistance. In this study, a fractal model was established to characterize the air voids size-distribution in concrete, and the corresponding fractal dimension obtained from the fractal model was validated for its effectiveness in describing the air voids size-distribution quantitatively. By comparison to a fractal model presented in a previous study, the fractal model proposed in this study was found more reasonable and reliable. Based on the theoretical principle, correlations between air voids size-distributions and the measured freeze–Thaw Resistances of concrete were established through laboratory experiments. The results revealed that air voids size-distribution exhibited more significant influence on the freeze–Thaw Resistance of concrete than the air-void spacing. Furthermore, a regression equation with fairly high correlation coefficient between the fractal dimension of air voids size-distribution and the durability factors of concrete was obtained from the results.
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fractal analysis of effect of air void on freeze Thaw Resistance of concrete
Construction and Building Materials, 2013Co-Authors: Shanshan Jin, Jin Xi Zhang, Baoshan HuangAbstract:Pore structure is one of the major characteristics influencing the freeze–Thaw Resistance of concrete. Although the air-void spacing factor associated to the porosity features of concrete is known as a widely used parameter to assess the freeze–Thaw Resistance, controversies on the determination of critical values of air-void spacing factor still exist in many related studies. Moreover, it is reported that the pore-size distribution in concrete also significantly affects its freeze–Thaw Resistance. In this study, a fractal model was established to characterize the air voids size-distribution in concrete, and the corresponding fractal dimension obtained from the fractal model was validated for its effectiveness in describing the air voids size-distribution quantitatively. By comparison to a fractal model presented in a previous study, the fractal model proposed in this study was found more reasonable and reliable. Based on the theoretical principle, correlations between air voids size-distributions and the measured freeze–Thaw Resistances of concrete were established through laboratory experiments. The results revealed that air voids size-distribution exhibited more significant influence on the freeze–Thaw Resistance of concrete than the air-void spacing. Furthermore, a regression equation with fairly high correlation coefficient between the fractal dimension of air voids size-distribution and the durability factors of concrete was obtained from the results.
