Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Multi-scale creep analysis of SCM-modified concrete: indentation test and multiscale homogenization method
https://orcid.org/http://orcid.org/0000-0002-6641-2097
Traditional concrete creep testing and prediction methods are cumbersome and time-consuming. In this study, the creep behavior of concrete modified with various supplementary cementitious materials (sludge and fly ash, 10–30 wt.%) was investigated and analyzed using the indentation tests and multiscale homogenization analysis. The study revealed that incorporating 10% water treatment sludge ash (WTSA) effectively enhanced concrete’s axial compressive strength and elastic modulus, while reducing its creep strain. This was mainly because adding 10% WTSA improved the compactness of concrete and increased the ratio of high density (HD) C–S–H in C–S–H gel and reduced the width of interfacial transition zone (ITZ). However, a higher content of WTSA admixture was observed to negatively impact the concrete properties. Furthermore, the creep behavior of concrete was predicted through multiscale homogenization calculations. Utilizing the nanoindentation technique, accurate predictions in the multiscale creep model can be obtained by differentiating and quantifying the volume fraction of the physical phase based on the characteristic indentation modulus. In contrast, the quantitative results of the physical phase obtained from the inverse convolution need to be corrected by thermogravimetric analysis and backscattered electrons to obtain a higher level of accuracy in creep prediction.
Multi-scale creep analysis of SCM-modified concrete: indentation test and multiscale homogenization method
https://orcid.org/http://orcid.org/0000-0002-6641-2097
Traditional concrete creep testing and prediction methods are cumbersome and time-consuming. In this study, the creep behavior of concrete modified with various supplementary cementitious materials (sludge and fly ash, 10–30 wt.%) was investigated and analyzed using the indentation tests and multiscale homogenization analysis. The study revealed that incorporating 10% water treatment sludge ash (WTSA) effectively enhanced concrete’s axial compressive strength and elastic modulus, while reducing its creep strain. This was mainly because adding 10% WTSA improved the compactness of concrete and increased the ratio of high density (HD) C–S–H in C–S–H gel and reduced the width of interfacial transition zone (ITZ). However, a higher content of WTSA admixture was observed to negatively impact the concrete properties. Furthermore, the creep behavior of concrete was predicted through multiscale homogenization calculations. Utilizing the nanoindentation technique, accurate predictions in the multiscale creep model can be obtained by differentiating and quantifying the volume fraction of the physical phase based on the characteristic indentation modulus. In contrast, the quantitative results of the physical phase obtained from the inverse convolution need to be corrected by thermogravimetric analysis and backscattered electrons to obtain a higher level of accuracy in creep prediction.
Multi-scale creep analysis of SCM-modified concrete: indentation test and multiscale homogenization method
https://orcid.org/http://orcid.org/0000-0002-6641-2097
Traditional concrete creep testing and prediction methods are cumbersome and time-consuming. In this study, the creep behavior of concrete modified with various supplementary cementitious materials (sludge and fly ash, 10–30 wt.%) was investigated and analyzed using the indentation tests and multiscale homogenization analysis. The study revealed that incorporating 10% water treatment sludge ash (WTSA) effectively enhanced concrete’s axial compressive strength and elastic modulus, while reducing its creep strain. This was mainly because adding 10% WTSA improved the compactness of concrete and increased the ratio of high density (HD) C–S–H in C–S–H gel and reduced the width of interfacial transition zone (ITZ). However, a higher content of WTSA admixture was observed to negatively impact the concrete properties. Furthermore, the creep behavior of concrete was predicted through multiscale homogenization calculations. Utilizing the nanoindentation technique, accurate predictions in the multiscale creep model can be obtained by differentiating and quantifying the volume fraction of the physical phase based on the characteristic indentation modulus. In contrast, the quantitative results of the physical phase obtained from the inverse convolution need to be corrected by thermogravimetric analysis and backscattered electrons to obtain a higher level of accuracy in creep prediction.
Multi-scale creep analysis of SCM-modified concrete: indentation test and multiscale homogenization method
Archiv.Civ.Mech.Eng
He, Zhi-hai (Autor:in) / Jin, Dian (Autor:in) / Shi, Jin-yan (Autor:in) / Han, Xu-dong (Autor:in) / Jamal, Ahmed Salah (Autor:in)
12.04.2024
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
| British Library Online Contents | 2010