Sound absorption and morphology characteristic of porous concrete paving blocks

Global Congress on Construction, Material and Structural Engineering 2017

材料科学;土木建筑工程

Abd Halim, N.H.^1 ; Nor, H Md^1 ; Ramadhansyah, P.J.^1 ; Moham, A.^1 ; Abdul Hassan, N.^1 ; Wan Ibrahim, M.H.^2 ; Ramli, N.I.^3 ; Mohamed Nazri, F.^4

Faculty of Civil Engineering, Department of Geotechnics and Transportation, Universiti Teknologi Malaysia, Johor Bahru

81310, Malaysia^1

Faculty of Civil and Environmental Engineering, Universiti Tun Hussein Onn Malaysia, Batu Pahat, Johor Bahru

86400, Malaysia^2

Faculty of Civil Engineering and Earth Resources, Universiti Malaysia Pahang, Pahang, Gambang

26300, Malaysia^3

School of Civil Engineering, Universiti Sains Malaysia, Engineering Campus, Nibong Tebal, Penang

14300, Malaysia^4

关键词: Coarse aggregates;    Different frequency;    Different sizes;    Impedance tubes;    Microstructure morphologies;    Porous concretes;    Sound absorption;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/271/1/012015/pdf
DOI  :  10.1088/1757-899X/271/1/012015

来源: IOP

【 摘 要 】

In this study, sound absorption and morphology characteristic of Porous Concrete Paving Blocks (PCPB) at different sizes of coarse aggregate were presented. Three different sizes of coarse aggregate were used; passing 10 mm retained 5 mm (as Control), passing 8 mm retained 5 mm (8-5) and passing 10 mm retained 8 mm (10-8). The sound absorption test was conducted through the impedance tube at different frequency. It was found that the size of coarse aggregate affects the level of absorption of the specimens. It also shows that PCPB 10-8 resulted in high sound absorption compared to the other blocks. On the other hand, microstructure morphology of PCPB shows a clearer version of existing micro-cracks and voids inside the specimens which affecting the results of sound absorption.