ABSTRACT

In Korea, the transverse tining method has been applied to the surface texture of concrete pavements as it provides excellent skid resistance that improves road safety. However, transverse tining produces higher noise levels of about 4–5 dB(A) compared to asphalt pavements. Accordingly, exposed aggregate concrete pavement (EACP) is introduced since the low tyre-pavement noise and long-term skid resistance can be obtained. Surface texture of this pavement consists of coarse aggregates that are exposed after the removal of the cement mortar. Tyre-pavement noise in EACP resembles that in asphalt pavement due to the similar surface texture that is characterised by wavelength. This parameter is the distance between aggregate particles; thus, it is significantly related to the size and amount of coarse aggregate in the mixture proportion. In addition, short wavelength tends to produce low tyre-pavement noise and this can be a criterion to minimise the noise level in pavement design. Therefore, this study aims to optimise the mixture proportion of low-noise EACP based on the requirement of surface texture and structural capacity. As a result, concrete mixture with 8-mm size and 27% amount of coarse aggregate provided as short-wavelength as asphalt pavement and adequate structural strength was also achieved.

摘要

在韩国，横向着色法已应用于混凝土路面的表面纹理，因为它具有出色的防滑性，可提高道路安全性。然而，与沥青路面相比，横向倾斜会产生约 4–5 dB(A) 的更高噪音水平。因此，引入了外露骨料混凝土路面（EACP），因为可以获得低轮胎路面噪音和长期防滑性。该路面的表面纹理由去除水泥砂浆后暴露的粗骨料组成。EACP 中的轮胎-路面噪声与沥青路面中的噪声相似，因为具有相似的表面纹理，以波长为特征。该参数是骨料颗粒之间的距离；因此，它与配合比中粗骨料的大小和数量有显着的相关性。此外，短波长往往会产生较低的轮胎路面噪音，这可以作为在路面设计中最小化噪音水平的标准。因此，本研究旨在根据表面纹理和结构容量的要求优化低噪声EACP的混合比例。结果，还实现了具有 8 毫米尺寸和 27% 量的粗骨料作为沥青路面的短波长和足够的结构强度的混凝土混合物。