アスファルトならびに結晶性パラフィンおよびステアリン酸塩類を添加したアスファルトのレオロジー的性質 : 土,岩石,コンクリートのレオロジー

概要

論文の詳細を見る
Petroleum asphalt is a so-called viscoelastic material. In this paper, the dynamic properties of some kinds of straight asphalts, which are residual materials obtained in a vacuum distillation process of crude oil, have been investigated by means of a method which has been effective in studying the linear viscoelasticity of many kinds of amorphous polymers. Furthermore, the viscoelasticity of straight asphalt with crystal paraffin or some kinds of stearates has been also examined. The results obtained are as follows : (1) Straight asphalt is a thermorhelogically simple material, the temperature dependence of the shift factor a_T reduced to the standard temperature T_S obeys the WLF's equation and this material has a glass transition point T_f and the difference between T_S and T_g is about 50℃. (2) The dynamic viscoelasticity of asphalt with crystal paraffin varies rapidly at temperature where the crystallization or melting of the paraffin occurs. (3) The dynamic viscoelasticity of asphalt with Al-stearate does not differ so much from that of one without it, but that of the asphalt with Ca-stearate or Na-stearate clearly differs from that of one without them. Namely, that dynamic viscosities of these materials very remarkably depending upon frequencies.
社団法人日本材料学会の論文
1963-05-15