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迄今为止,针对混凝土路面砖透水路面(PICP)结构透水基层材料的研究,绝大多集中于采用非粘结颗粒材料上。本文则介绍用于PICP基层、掺水泥作为稳定颗粒材料的试验研究。对一系列使用相同级配集料的水泥稳定颗粒材料,试验研究所得到的路基性能,均优于目前为PICP推荐的基层材料性能。为确定这些因素对路面结构水文和结构性能的影响,对不同颗粒尺寸集料和不同水泥掺加量进行试验。测量孔隙率、渗透率、抗压强度、抗拉强度,以及在三轴荷载反复作用下所获得拉伸弹性模量值,进行了详细叙述;并将这些性能,与以前采用的传统路基材料和透水路基材料的性能,进行了对比。讨论这些研究结果,在PICP设计和施工中有指导意义。结果表明,掺水泥稳定基层材料具有高孔隙率和高渗透率,以及支撑路面足够交通荷载所需要的力学性能。
To date, most of the research on permeable base material for permeable pavement (PICP) structures of concrete pavement bricks has focused on the use of non-bonded particulate materials. This article describes the experimental study of a PICP-based, cement-added stabilized particulate material. For a series of cement stabilized particulate materials using the same graded aggregates, the subgrade properties obtained from the pilot studies are superior to those of the currently recommended base material for PICP. In order to determine the influence of these factors on the hydrological and structural properties of pavement structure, different particle size aggregates and different cement admixtures were tested. Measurement of porosity, permeability, compressive strength, tensile strength, and tensile modulus of elasticity obtained under repeated triaxial loads are described in detail; and these properties are compared with those of conventional subgrade materials and The performance of permeable subgrade materials was compared. Discussing these findings is instructive in PICP design and construction. The results show that the cement-stabilized base material possesses high porosity and high permeability and the mechanical properties needed to support sufficient traffic load on the pavement.