A STUDY ON THE RELATION BETWEEN THE VOID STRUCTURE AND THE SOUND ABSORPTION CHARACTERISTIC OF POROUS CONCRETE

摘要

This paper aimed to estimate the relation between the void structure and sound absorption with porous concrete. At first, it was investigated the mechanism of the sound absorption with porous structure. The authors determined fixed quantity evaluation criteria of void structure and evaluation criteria of the sound absorption characteristic by considering the result. We did examination by using regression analysis and also multiple regression analysis about the relation between void structure and the sound absorption characteristic by using the value of these evaluation criteria. And the factors of air void system and some characteristic properties for sound absorption of porous concrete were measured and the relationship between them was evaluation. Based on the results, it was clear that the internal surface area of porous concrete gives sound absorption characteristic the most significant influence.