高反射保水阻热多孔水泥路面的力学及降温特性

Mechanics and Cooling Characteristics of Porous Cement Pavement with High Reflecting Water Retention and Heat Resistance

为了维持路面的高温稳定性,缓解城市热岛效应,以保水、阻热和光反射等技术为基础,通过理论分析、室内试验等手段,研发出一种新型的高反射保水阻热多孔水泥路面,并对其抗压强度、抗折强度和降温效果进行测试。结果表明:高反射保水阻热水泥混凝土的28、90 d抗压强度可以达到30.4 MPa和42.1 MPa,28、90 d抗折强度分别为4.6 MPa和6.1 MPa;与SMA沥青混合料、普通水泥混凝土、保水水泥混凝土相比,保水阻热水泥混凝土的路表最高温度分别降低11.4℃、5.5℃和4.1℃,路面内部最高温度分别降低10.3℃、6.1℃和4.6℃,具有良好的降温效果。

In order to maintain the stability of the road surface temperature and ease the urban heat island effect, based on such technologies as water retention, heat resistance and light reflection, a new type of highly reflective water-retaining and heat-resisting porous cement pavement was developed through theoretical analysis and laboratory tests. Its compressive strength, flexural strength and cooling effect were tested. The results show that the compressive strength of the highly reflective water-retaining and heat-resisting porous cement concrete can reach 30.4 MPa and 42.1 MPa at 28 d and 90 d respectively, and the flexural strength at 28 d and 90 d is 4.6 MPa and 6.1 MPa respectively; compared with SMA asphalt mixture, normal cement concrete and water-retained cement concrete, the maximum temperature on the surface of the highly reflective water retaining and heat-resisting porous cement pavement decreases by 11.4 ℃, 5.5 ℃ and 4.1℃, and internal maximum temperature drops by 10.3 ℃, 6.1 ℃ and 4.6 ℃, which demonstrates a good cooling effect.