本研究進行泥砂漿體的流變實驗及坍度實驗，探討其流變參數與坍度參數間的關聯性。流變實驗所使用之流變計為DV-III型水平旋轉式流變計，坍度實驗所使用之坍度儀為國家CNS標準規格之等比例縮小模具(平截圓錐體)，其頂端直徑為5 cm，底端直徑為10 cm，高度為15 cm。實驗使用的泥砂漿體材料有兩種高嶺土漿體及水庫淤泥漿體。高嶺土及水庫淤泥的中值粒徑為0.0048 mm及0.0036 mm。實驗採用25%、27.5%、30%、32.5%及35%五種體積濃度；再以體積濃度30%之高嶺土及水庫淤泥二種細泥砂漿體為基底，加入不同含量之粗顆粒(玻璃珠及砂顆粒，其平均粒徑皆約為1 mm)，調配成30%、40.5%、44%、47.5%及51%五種體積濃度之混合泥砂漿體，並分別求其流變特性及坍度特性。
流變實驗結果顯示，細泥漿體與混合泥砂漿體在低剪切率(20 s-1以下)時之流變特性大致符合賓漢流體模式。同時其流變參數(賓漢屈服應力及黏滯係數)會受到漿體濃度與粗顆粒的影響而有所不同，其濃度愈高，流變參數值愈大。坍度實驗結果顯示，細泥漿體隨著體積濃度的增加，坍流直徑及坍落度會逐漸減少；而混合泥砂漿在體積濃度含量在到達某一臨界量體時，粗顆粒才會對坍流直徑及坍落度造成較明顯之影響。綜觀兩實驗結果得知，細泥漿體在體積濃度25%至35%；混合泥砂漿體在粗顆粒含量為15%至30%時，將流變參數及坍度參數之關係做線性迴歸，其線性趨勢之r2的平均值為0.91。因此細泥漿體及混合泥砂漿體皆可以利用坍度實驗來推估流變參數。

This study investigated the relationships of the rheological parameters with respect to slump parameters for the materials of sediment-mixture slurry. Rheological parameters of sediment-mixture slurry were measured from laboratory experiments using the DV-III horizontal rotary rheometer. Slump parameters were measured from slump test through slump cone of the national standard of CNS down scaling mold (i.e., top diameter of 5 cm, the bottom diameter 10 cm, height 15 cm ). Sediment materials used in this study are kaolin soil and reservoir sedimentation with median diameters of 0.0048 mm and 0.0036 mm, respectively. Here we proportioned five sediment volume concentration of kaolin soil and reservoir sedimentation with 25%, 27.5%, 30%, 32.5% and 35% for rheological and slump experiments. Based on the, we also added coarse particles (with mean diameter of 1 mm) into those above mentioned slurry samplings that were further proportioned into volume concentration of 30%, 40.5%, 44%, 47.5% and 51% of sediment-mixture slurries to characterize the effect of coarse particles on its corresponding rheological and slump properties.
Rheological experimental results show that mud slurries and sediment-mixture slurries used in this study can be attributed as the Bingham fluid under a low shear rate. Rheological parameters (i.e., yield stress and viscosity) are affected by the concentration of slurry and coarse particles, indicating that the higher the concentration, the greater the value of the rheological parameters. On the other hand, slump test show that the slump diameters and slump heights of mud slurries decrease with increase in its corresponding volume concentration but coarse particles can only significantly affect slump diameters and slump heights of slurries when their volume concentration were higher than a threshold. Also, we established linear relationships between the parameters of rheology and slump for the mud slurries with volume concentration of 25% to 35% and sediment-mixture slurries with volume concentration of 15% to 30%, showing the determined coefficient r2 averages 0.91. These patterns indicates that slump parameters of sediment materials (i.e, slump diameters and slump heights) can be used to evaluate its corresponding rheological parameters.

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