从沥青的温度与密度关系预测沥青的低温性质

Predict low-temperature properties of asphalt from the relationship between density and temperature

沥青的密度是沥青的一个基础性质,它反映沥青的结构信息。任何物质的结构信息与其宏观性质都有内在联系。通过研究国产两种沥青的密度与温度关系,沥青的脆点和低温蠕变性质的数据,研究从密度判断沥青抗低温收缩裂缝能力的有效性。研究得出:沥青的密度与温度呈直线关系,从不同温度下的沥青密度的变化可以判断沥青抗低温收缩裂缝的能力。与脆点和沥青的低温蠕变性质相比,密度与温度的关系判断沥青路面的低温收缩裂缝更接近路面产生低温收缩裂缝的原理。

Density is a basic property of structure of any material information with their asphalt, it reflect the information of asphalt structure. The macroscopic properties is intrinsically linked to. Relationship between density and temperature, brittle point of asphalt, lower- temperature creep property were studied , and from these data we predict the validity of using the relationship of density and temperature to predict the ability of resisting low - temperature cracking. The results showed that the relationship between the density and temperature is linear; it is doable to predict the ability of resisting low - temperature cracking by the changing rule of density with temperature. The principle of predicting the ability of resisting low - temperature cracking by the relationship between density and temperature of asphalt is close to the principle of the low - temperature cracking of pavement comparing with brittle point of asphalt and lower - temperature creep property.