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（新疆大學(xué)建筑工程學(xué)院， 烏魯木齊 830047）

［摘要］對(duì)天然沙漠砂代替普通工程用砂的可行性進(jìn)行了驗(yàn)證，對(duì)天然沙漠砂混凝土梁的受彎性能進(jìn)行了研究。通過(guò)試驗(yàn)配制出了C20，C30天然沙漠砂混凝土，對(duì)比分析了天然沙漠砂混凝土試塊與普通砂混凝土試塊的破壞形狀和曲線，然后通過(guò)6根普通砂鋼筋混凝土簡(jiǎn)支梁和6根天然沙漠砂鋼筋混凝土簡(jiǎn)支梁的正截面受彎性能試驗(yàn)，對(duì)比分析了在混凝土強(qiáng)度、配筋率和幾何尺寸相同的條件下，普通砂混凝土梁與天然沙漠砂混凝土梁的正截面承載力、撓度和破壞特性。研究結(jié)果表明：天然沙漠砂可以作為建筑用細(xì)骨料，天然沙漠砂混凝土梁表現(xiàn)出與普通砂混凝土梁基本相似的特性，試驗(yàn)結(jié)果與理論計(jì)算值吻合較好，普通砂混凝土梁的相關(guān)理論、正截面承載力公式等可用于天然沙漠砂混凝土梁。

［關(guān)鍵詞］可行性； 天然沙漠砂混凝土； 受彎性能； 鋼筋混凝土梁； 破壞特性

中圖分類號(hào)：TU528-56文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2017)24-0098-07

Experimental study on bending behavior of reinforced concrete beam using natural desert sand

 Dong Cun, Sawulet·Bekey, Elyar·Abdurexet, Yuan Haixiang 

(College of Architecture and Engineering, Xinjiang University, Urumqi 830047, China)

Abstract:The feasibility of using natural desert sand instead of using ordinary engineering sand was investigated, and the bending behavior of the natural desert sand was investigated. C20 and C30 concrete materials were produced using natural desert sand. Damage shapes and the curves of ordinary sand cubes and natural desert sand cubes were studied through comparison. Then the bending behavior of  6 reinforced concrete (RC) beams using ordinary engineering sand and another 6 using natural desert sand were fabricated and tested. Bending strength, deformation capacity and damage characteristics were studied through comparison under same strength of concrete, reinforcement ratio and geometry. Test results suggest that the natural desert sand can be an aggregate for concrete, and the RC beams using natural desert sand show similar bending behavior with those using ordinary engineering sand, the results obtained from theoretic calculations agree well with those obtained from physical tests, the bending strength calculation formula for RC beams using ordinary engineering sands is applicable to those using natural desert sand.

Keywords:feasibility; natural desert sand concrete; bending behavior; reinforced concrete beam; damage characteristics

*國(guó)家自然科學(xué)基金項(xiàng)目(51668059)。

通訊作者：沙吾列提·拜開依，碩士，碩士生導(dǎo)師，教授，Email：jgxyswlt@xju.edu.cn。