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问题	现场浇筑混凝土为什么严禁随意加水
释义	法律分析：现场浇筑混凝土严禁随意加水，混凝土随意加水会导致：1、局部水灰比增大务必导致局部强度偏低；2、局部强度偏低会形成一个混凝土质量弱区，裂缝等问题产生；3、可能造成泵送混凝土离析而堵管；4、可能造成蜂窝，麻面，孔洞等现象；5、影响混凝土耐久性。若造成上述问题，会导致工程出现问题。法律依据：《混凝土结构工程施工规范》第四十八条国家标准混凝土容重：特重混凝土（2500kg/m3）；普通混凝土（1900——2500kg/m3）；轻混凝土（600——1900kg/m3）。
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