Road Cooling Material Combining Heat Reflection and Thermal Resistance

Abstract

The invention discloses a heat-reflection-and-heat-resistance-combined road cooling material. The heat-reflection-and-heat-resistance-combined road cooling material is prepared from porous asphalt, color fillings, aggregate, porous fly ash microspheres, light calcium carbonate, talcum powder, organic bentonite, pure acrylic emulsion, silicone acrylic emulsion and the like; a preparing method of the porous fly ash microspheres includes the following steps that dried fly ash and concentrated sulphuric acid are mixed according to the molar ratio of the concentrated sulphuric acid to metal oxide in the fly ash of 0.2-1.6, then the mixture is roasted for 80 min to 120 min at the temperature of 180 DEG C to 280 DEG C, soluble salt in the mixture is dissolved out with the water bath method, and solid-liquid separation is carried out, wherein the water-bath temperature is 45 DEG C to 80 DEG C, and water-bath time is 0.5 h to 1.0 h; the over-high pavement temperature is 'actively' reduced withheat reflection and heat resistance technological means, the working temperature of a pavement structure is reduced, the temperature reduction amplitude can be 15 DEG C to 20 DEG C, the heat storage capacity of a road body can also be reduced, rutting damage of an asphalt concrete pavement is reduced accordingly, the thermal physics characteristic of urban paving is improved, and the increasingly-serious urban heat island effect can be effectively relieved.

Description

technical field [0001] The invention relates to a pavement material, in particular to a pavement cooling material which combines heat reflection and heat resistance for pavement. Background technique [0002] The urban heat island effect has become a serious environmental problem. Its harm is not only manifested in the hot summer weather that it will cause, but also in the health of citizens, air pollution from furniture, natural disasters in local areas, abnormal climate and phenology, and aggravated energy crisis. Asphalt pavement has become the main form of road paving at home and abroad because of its good driving comfort, low noise, short construction period, and low cost. However, a significant disadvantage of asphalt concrete pavement is its strong ability to absorb solar radiation. The newly built asphalt concrete pavement has an absorption rate of solar radiation energy of up to 0.95. Under the load of the wheels in use, the asphalt covering the stone material is w...

AI Technical Summary

Problems solved by technology

Asphalt pavement has become the main form of road paving at home and abroad because of its good driving comfort, low noise, short construction period, and low cost. However, a significant shortcoming of asphalt concrete pavement is its strong ability to absorb solar radiation.