Relation between Fracture Behavior and Curing Conditions of Epoxy Asphalt Mixture

スポンサーリンク

概要

• 論文の詳細を見る

• The process the epoxy asphalt mixture undergoes until it finally hardens changes with its curing conditions, and during the process the mixture will show some variation in its mechanical properties. A knowledge of the process in which the epoxy asphalt mixture changes its mechanical properties is as important as that of the mechanical properties of the mixture when finally hardened.In this paper, fracture behaviors of the epoxy asphalt mixture when cured in the open air, when cured at a constant temperature of 20°C, and when cured in accelerated curing conditions, i.e., at 120°C for 6 hours, were discussed, and changes in fracture behavior of the epoxy asphalt mixture until finally hardened were examined in comparison with those of the straight asphalt mixture.The breaking strength σb of the epoxy asphalt mixture cured at a constant temperature of 20°C for one day was approximately 1.1×101kg/cm2 (Fig. 1) at a strain rate of 2.91×10-2sec-1. The σb value of the epoxy asphalt mixture cured at a constant temperature of 20°C for 12 days was almost the same as that of the straight asphalt mixture, i.e., 5×101kg/cm2. When cured in the above conditions for 180 days, the epoxy asphalt mixture gave a σb value that was thought to represent the breaking strength in the finally hardened state. This value was identified with the value of 1.8× 102kg/cm2 obtained from the epoxy asphalt mixture cured in the accelerated conditions at 120°C for 6 hours. The results for strain εb and stiffness Sb were similar to those for σb (Figs. 2 and 3).The σb value of the epoxy asphalt mixture cured in the open air for 10 days was the same as that of the straight asphalt mixture (Fig. 5). When the epoxy asphalt mixture was cured in the above conditions for 30 days, the final breaking strength σb of 1.8×102kg/cm2 was obtained.As described in the above, the hardening process of the epoxy asphalt mixture varies with its curing conditions. We have clarified the hardening process by examining the changes in fracture behavior. Further, it was found that the products finally hardened in the different curing conditions had almost the same values of breaking strength σb, strain εb, and stiffness Sb. Based on these facts, it was concluded that the method of preparing test specimens of epoxy asphalt mixture in the accelerated curing conditions at 120°C for 6 hours as usually employed in laboratories can properly be used to know the mechanical properties of the material, and further, we could discuss in details how the epoxy asphalt mixture when used as a binder of road pavement changes its strength until it finally hardens.

• 公益社団法人 石油学会の論文

公益社団法人 石油学会 | 論文

• 担持金属ルテニウム触媒によるレブリン酸メチルの液相水素化反応
• 各種バイオエタノールサンプル中の不純物分析
• 超臨界水ガス化におけるフェノールとベンゼンの分解経路
• ベータ型ゼオライトを触媒添加材として用いた重質油接触分解での多次元反応制御
• バイオディーゼル燃料生成における低価格植物油の脱酸処理の影響

もっと見る

スポンサーリンク