【摘要】：為研究粉煤灰粒徑對(duì)高濃度膠結(jié)充填材料性能的影響,對(duì)原狀粉煤灰進(jìn)行研磨分析,獲得不同粒徑特征的粉煤灰顆粒群。通過測試粉煤灰-水泥-煤矸石混合料的堆積空隙率,研究了粉煤灰粒徑特征對(duì)混合干料空隙率的影響,以及料漿流變特征、坍落度和單軸抗壓強(qiáng)度與粉煤灰粒徑之間的關(guān)系。研究結(jié)果表明,充填料漿坍落度與混合干料堆積空隙率線性相關(guān),料漿屈服應(yīng)力和塑性粘度隨粉煤灰粒徑的減小而減小,單軸抗壓強(qiáng)度隨粒徑的減小而增大。
[Abstract]:In order to study the effect of particle size of fly ash on the properties of high concentration cemented filling materials, raw fly ash was ground and analyzed, and different particle groups of fly ash with different particle size characteristics were obtained. The influence of particle size characteristics of fly ash on the porosity of dry mixture and the relationship among rheological characteristics, slump, uniaxial compressive strength and particle size of fly ash were studied by testing the stacking void ratio of fly ash-cement-coal gangue mixture. The results show that the slump of the filling slurry is linearly related to the porosity of the mixed dry mixture, the yield stress and the plastic viscosity of the slurry decrease with the decrease of the particle size of fly ash, and the uniaxial compressive strength increases with the decrease of the particle size.
【作者單位】： 中國礦業(yè)大學(xué)(北京)資源與安全工程學(xué)院;
【基金】：“十一五”國家科技支撐計(jì)劃資助項(xiàng)目((2011BAB48B02) 中央高�；究蒲袠I(yè)務(wù)費(fèi)專項(xiàng)資金資助項(xiàng)目(2014QZ03)
【分類號(hào)】：TD823.7

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