Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Laboratorial investigation on sound absorption property of porous concrete with different mixtures
Highlights Effect of aggregate gradation on sound absorption ability of porous concrete was examined. Effect of thickness on sound absorption ability of porous concrete was explored. Influence of cement to aggregate ratio on sound absorption ability of porous concrete was analyzed. Correlation between porosity and sound absorption ability was investigated.
Abstract Porous concrete (PC) is considered as an environmentally friendly pavement material due to its internal porosity. It has good functions such as: mitigate stormwater runoff, removal water pollutants, noise reduction, and mitigate urban heat island benefits. Many parameters have an effect on the sound reduction of PC, especially the porosity was often considered as the main factor affecting the sound absorption ability of PC. Therefore, thirty-six groups of porous concrete were selected to obtain different porosities of PC samples in this study. These groups include twelve kinds of aggregate gradation and three kinds of cement to aggregate (C/A) ratios. The selected concrete materials are mixed and cast on different thicknesses to study the influence of different mixtures on the sound absorption ability of PC using impedance tubes method with varied sound frequency (200 ~ 2000 Hz). In addition, the correlation between the sound absorption ability and the porosity of mixtures was investigated. The results show that the porosity, aggregate gradation, C/A ratio and pavement thickness have significant effects on the sound absorption performance for the examined PC mixtures.
Laboratorial investigation on sound absorption property of porous concrete with different mixtures
Highlights Effect of aggregate gradation on sound absorption ability of porous concrete was examined. Effect of thickness on sound absorption ability of porous concrete was explored. Influence of cement to aggregate ratio on sound absorption ability of porous concrete was analyzed. Correlation between porosity and sound absorption ability was investigated.
Abstract Porous concrete (PC) is considered as an environmentally friendly pavement material due to its internal porosity. It has good functions such as: mitigate stormwater runoff, removal water pollutants, noise reduction, and mitigate urban heat island benefits. Many parameters have an effect on the sound reduction of PC, especially the porosity was often considered as the main factor affecting the sound absorption ability of PC. Therefore, thirty-six groups of porous concrete were selected to obtain different porosities of PC samples in this study. These groups include twelve kinds of aggregate gradation and three kinds of cement to aggregate (C/A) ratios. The selected concrete materials are mixed and cast on different thicknesses to study the influence of different mixtures on the sound absorption ability of PC using impedance tubes method with varied sound frequency (200 ~ 2000 Hz). In addition, the correlation between the sound absorption ability and the porosity of mixtures was investigated. The results show that the porosity, aggregate gradation, C/A ratio and pavement thickness have significant effects on the sound absorption performance for the examined PC mixtures.
Laboratorial investigation on sound absorption property of porous concrete with different mixtures
Zhang, Yi (Autor:in) / Li, Hui (Autor:in) / Abdelhady, Ahmed (Autor:in) / Du, Hongwei (Autor:in)
28.07.2020
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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