SURFACE WATER AMOUNT MANAGEMENT METHOD FOR CONSTRUCTION MATERIAL

PROBLEM TO BE SOLVED: To accurately grasp particle size distribution and moisture content of a construction material to be used, to properly manage a surface water amount.SOLUTION: Moisture content of a construction material (e.g. CSG material) is measured by a microwave moisture meter 20. The construction material is flown downward in a state of diffusing the construction material evenly by diffusion flow-down means 60, and captured by imaging means 70; the captured image data is subjected to image analysis; and then particle size distribution of the construction material is obtained by particle size distribution analysis method 40. With the measurement result of the moisture content and the analysis result of the particle size distribution, a surface water amount of the construction material is managed. Measuring the moisture content with the microwave moisture system is preferably performed for each kind of construction material to be mixed and used. When the construction material is flown downward in a state of diffusing the construction material evenly, after vibration is added to the construction material in a conveyance path to make it into a thin layer, the construction material is preferably fallen in a vertical direction.SELECTED DRAWING: Figure 2 【課題】 使用する建設材料の粒度分布及び含水率を正確に把握して、表面水量を適切に管理する。【解決手段】 建設材料（例えばＣＳＧ材）の含水率をマイクロ波水分計２０により測定する。拡散流下手段６０により建設材料を均一に拡散した状態で流下させて撮像手段７０により撮像し、撮像した画像データを画像解析し、粒度分布解析手段４０により建設材料の粒度分布を求める。含水率の測定結果と、粒度分布の解析結果とを用いて、建設材料の表面水量を管理する。マイクロ波水分系による含水率の測定は、混合して使用する建設材料の種類毎に行うことが好ましい。建設材料を均一に拡散した状態で流下させる際、搬送経路で建設材料に振動を加えて薄層とした後に、建設材料を鉛直方向に落下させることが好ましい。【選択図】図２