ESTIMATION METHOD OF BENTONITE MIXING RATIO

To provide an estimation method of a bentonite mixing ratio with high accuracy without requiring labor or skill in measurement.SOLUTION: This invention relates to an estimation method of the bentonite mixing ratio of a bentonite mixed soil. The method comprises: a measurement step for measuring the water content ratio and water potential of a bentonite mixed soil with its bentonite mixing ratio unknown; and an estimation step for estimating the bentonite mixing ratio of the bentonite mixed soil with the unknown bentonite mixing ratio by applying the measured values of water content ratio and water potential to a prescribed correlation equation between a corrected water content ratio which is obtained by correcting the bentonite mixing ratio in advance and the water potential. The corrected water content ratio and the water potential have a high correlation, and the measurement of the water content ratio and water potential of the bentonite mixed soil does not require skill or labor. Therefore, the estimation method of the bentonite mixing ratio with high accuracy can be obtained without requiring labor or skill in measurement.SELECTED DRAWING: Figure 3 【課題】測定に手間も熟練度も要することなく、精度の高いベントナイト混合率の推定方法を提供すること【解決手段】ベントナイト混合土のベントナイト混合率の推定方法である。本方法は、ベントナイト混合率未知のベントナイト混合土の含水比と水分ポテンシャルとを測定する測定工程と、前記測定した含水比および水分ポテンシャルの値を、予め求めた、ベントナイト混合率で補正した補正含水比と水分ポテンシャルとの所定の相関式に当てはめて前記ベントナイト混合率未知のベントナイト混合土のベントナイト混合率を推定する推定工程と、を有する。補正含水比と水分ポテンシャルとの間には高い相関があり、且つ、ベントナイト混合土の含水比と水分ポテンシャルは測定に熟練度及び手間を要求しないので、測定に手間も熟練度も要することなく、精度の高いベントナイト混合率の推定方法がもたらされる。【選択図】図３