【摘要】 屋盖与找平层对于混凝土干缩和温度的变化比较敏感 ,其原因是由于设计安全储备小 ,强度不足及施工质量差。其控制措施包括控制材料 ,使用钢筋 ,使用外加剂 ,提高施工质量 ,本文对其作了较详分析。更多还原

【Abstract】 The various changes of dry-shrink and temperature are fairly sensitive to the shape of a cast-in-site concrete roof and leveling blanket. The causes are listed as the following: desigins security capacity being insufficient; the strengh of concrete being poor and the quality of construction being poor.the methods of crack control are:Controling materials; using steel; using admixtured concrete and expansion admixture concrete; enhancing the quality of construction.更多还原