Comparison of various testing methods for low-temperature properties of asphalts
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概要
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The Moriyoshi Breaking Point (MBP) test, Fraass Breaking Point (FBP) test and conventional tests, i.e., performance-related grade tests developed by the Strategic Highway Research Program (SHRP), were performed on asphalt of various ages at low temperatures, and the Thermal Stress Restrained Specimen Test (TSRST) on asphalt mixtures. In addition, a field investigation on relationships between the MBP of asphalt residuals aged by the High Temperature Long Time Durability test (HTLTD) and pavement-cracking temperatures was conducted. A strong correlation was found between the results of the MBP, FBP and conventional tests performed on asphalt concrete. The rate of strain and brittle point of the asphalts were linear during the various tests, and the MBP temperature after HTLTD testing could be used to prevent low-temperature cracking.この論文は低温で種々の劣化状態のアスファルトを用い，森吉ぜい化点（MBP）試験，フラースぜい化点（FBP）試験，SHRP（戦略的道路研究プログラム）が開発した試験との関係，およびこれらとアスファルト混合物の熱応力試験（TSRST）等との関係について述べている。加えて，高温長期耐久性試験（HTLTD）で劣化したアスファルトの森吉ぜい化点（MBP）と舗装のき裂との関係の現場調査も行っている。MBP，FBPおよびアスファルト混合物で実施した通常の試験の間に強い相関関係が得られた。ひずみ速度とアスファルトのぜい化点との関係も直線関係にあり，HTLTD後のMBP温度はアスファルト舗装の低温き裂現象を防ぐ一つの指標であることを明らかにした。
- Japan Petroleum Instituteの論文
Japan Petroleum Institute | 論文
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