高周波加熱装置を用いたフレッシュコンクリートの単位水量簡易迅速試験方法の開発

概要

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This report presents the results of experiment which aime is to establish the test method for water content of fresh concrete based on the heat dry method with microwave range. Water content of fresh concrete is expressed as follows. W=W_d+W_c+W_a where W: water content of fresh concrete (mortar) W_d: weight of water which is evaporates by drying W_c: hydrated water with cement W_a: weight of absorbed water in aggregate Various factors which would affect the duration and accuracy of the measurement were investigated in this experiment. The results are as follows. 1. The duration of the period required for the water to be evaporated by drying was about 40 minutes. 2. The weight of the water which is hydrated with cement during heat-drying is 1 to 1. 5 % of the weight of the cement. 3. The accuracy of the test when the heating time is 20 minutes is -5 % -0.5 %.
社団法人日本建築学会の論文
1989-06-30