【摘要】 江垭大坝为全断面碾压混凝土重力坝，采用少分缝坝体结构、中胶凝材料、高掺粉煤灰混凝土、大仓面薄层连续浇筑施工，为我国典型的RCC筑坝模式．应用人工骨料拌制混凝土，配合比的选择考虑了灰浆体积与砂空隙之比α、砂浆体积与粗骨料空隙之比β和灰浆与砂浆的绝对体积比V_p／V_m的适当选取，从而改善碾压混凝土在运输、摊铺过程中的抗分离能力并提高碾压混凝土的层面结合与防渗能力．更多还原

【Abstract】 Jiangya Dam, a full-section roller compacted concrete gravity dam, which employs the dam structure with few joints, medium cementing materials and high flyash concrete and adopts such construction method as to continuonsly place concrete in thin layers over a large area, is the typical RCC dam placernent model in China. The mix proportion of concrete mixed with artificial aggregate is determined by the rate between cement paste volume and sand gap (α),therate between mortar volume and coarse aggregate gap (β) and the air-free volumetric rate between cement paste and mortar (V_p/V_m), which should be a proper value to improve roller compacted concrete in anti-segregation property in the process of transportation and spreading and interlayer binding and impervious property.更多还原