マーシャル試験用供試体の空げき率算定値における誤差
スポンサーリンク
概要
- 論文の詳細を見る
In the Marshall test, the percentage of air voids has been used as a basis to determine the asphalt content. But, it is not easy to determine accurately the value of air voids of a compacted asphalt mixture. According to the author's experience, it is not rare to have the case that the calculated value of air voids content becomes negative. In this paper, in order to clarify the reason why the value of air voids content sometimes becomes too small an attempt was made to determine the effects of the following three factors on the calculated value of air voids content: (1) Method of measuring the volume of specimens, (2) method of measuring the specific gravity of aggregates, and (3) difference between the specified and the true asphalt content of compacted test specimens. From the results of the investigation, the following. conclusions were drawn. (1) The method of measuring the volume of compacted specimens affects the calculated value of air voids content. A minimum value was obtained when the volume was measured with paraffin coating. (2) The method of measuring the specific gravity of aggregates also affects the value of air voids content. A minimum value was obtained when the bulk. specific gravity was used. (3) When a large amount of asphalt is used, some of it adheres to the mixing and molding apparatus during the preparation of specimen. As the result, the value of air voids content calculated using the specified asphalt content is smaller than the true air voids.
- 社団法人日本材料学会の論文
- 1974-12-15
著者
関連論文
- アスファルト混合物の三軸試験値に及ぼすアスファルト針入度と骨材最大粒径の影響
- マーシャル安定度に及ぼすアスファルト針入度の影響
- アスファルトコンクリートにおける粗骨材の最大粒径に関する一実験
- 一定荷重下におけるセメントモルタルばりの破壊時間に関する二,三の実験
- マーシャル試験用供試体の空げき率算定値における誤差