現(xiàn)澆混凝土樓板收縮裂縫控制的試驗研究
張學宏 孫立進 叢俊華 魯文華 李 明 張鑒清
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（蘇州建筑職工大學 215000）［提要］ 通過對影響現(xiàn)澆混凝土樓板收縮裂縫主要因素的試驗分析，建議樓板的混凝土強度滿足耐久性和承載力要求即可（C20～C30），不宜取得過高；應盡量采用坍落度較小的混凝土；混凝土板必須振搗密實，并加強養(yǎng)護；采用泵送混凝土時，對普通板增加雙層、雙向溫度、收縮鋼筋用量。可供設計、施工和規(guī)范修訂時參考。［關鍵詞］ 混凝土樓板 收縮裂縫 強度等級 坍落度 鋼筋Test on Shrinkage Crack Controlling of Cast in situ Concrete Floors/Zhang Xuehong, Sun Lijin, Cong Junhua, Lu Wenhua, Li Ming, Zhang Jianqing (Suzhou Architecture Employee Univ., Suzhou 215000, China)Abstract:Based on the results of a shrinkage crack controlling test on cast in situ concrete floors, it is suggested that, the concrete strength grade of floor had better be C20～C30, as well as satisfy the demand of wear and bearing capacity; the concrete degree of collapse had better be low.; the concrete must be vibrated to be dense; when the pumped concrete is used, the setting steel should be intensified. The suggestions can be the references for the design, construction and codes emending.Keywords:concrete floor；shrinkage crack；strength grade；Degree of collapse； steel*蘇州市建設局資助項目。
