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求混凝土初步配合比计算

2025-04-03 09:22:02

推荐回答（3个）

回答1：

JJ55-2011配合比设计规程：1 fcu,o（配置强度）≥fcu,k(设计值）+1.645×标准差，标准差无统计资料差表取5. 2 水胶比 =粗骨料系数（aa)*胶材实际强度÷配置强度+粗骨料系数（aa*ab)*胶材实际强度（碎石系数aa 0.53 ab0.20 ）（胶材实际强度 42.5*1.1） 3 用水量查表取185kg 4 胶材=水/水胶比 5 砂率=（计算用砂量/计算用石量+计算用砂量）*100% 6 粗细骨料用量=（水泥用量/水泥密度）+（粗骨料用量/粗骨料密度）+（细骨料用量/细骨料密度）+（水用量/水密度）=1

回答2：

回答3：

JGJ55-2011《普通混凝土配合比设计规程》于2011.12.1实施后，与过去有很大不同，涉及比较复杂，网上不便于叙述。题目给出了材料密度，意在要求用体积法而不用重量法。请看该规范或阅读解读资料，建议参考以下网址。
http://wenku.baidu.com/view/eca29ba70029bd64783e2c73.html
http://wenku.baidu.com/view/9528dc1452d380eb62946d4d.html

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