本文關(guān)鍵詞： HRB335鋼筋 鐵尾礦砂混凝土 拔出試驗(yàn) 粘結(jié)滑移曲線　出處：《河北聯(lián)合大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著建筑業(yè)的迅速發(fā)展，對于混凝土的需求量也在日益增長，混凝土的砂、石等原材料出現(xiàn)了嚴(yán)重的危機(jī)。而隨著冶金工業(yè)的發(fā)展，鐵尾礦砂的產(chǎn)生量不斷增加，鐵尾礦砂的存在嚴(yán)重破壞了周圍的自然環(huán)境。試驗(yàn)采用的鐵尾礦砂混凝土是在加入一定添加劑的條件下，利用鐵尾礦砂代替普通河砂。目前，，國內(nèi)外對鐵尾礦砂混凝土的研究主要集中在其材料性能方面，但是缺少對鐵尾礦砂混凝土結(jié)構(gòu)性能的研究。試驗(yàn)主要研究鋼筋與鐵尾礦砂混凝土的粘結(jié)錨固性能，并與普通混凝土的相應(yīng)的性能進(jìn)行比較，同時研究其粘結(jié)錨固公式。 試驗(yàn)研究了鋼筋與鐵尾礦砂混凝土的粘結(jié)錨固性能，根據(jù)72個粘結(jié)錨固試件，剖析了兩種不同的混凝土在不同的強(qiáng)度等級(C20；C30；C40)和不同直徑(12mm；16mm；20mm；25mm)的鋼筋(HRB335)的粘結(jié)滑移曲線。試驗(yàn)共有三種試驗(yàn)現(xiàn)象，分別為混凝土劈裂、鋼筋被拔出、鋼筋頸縮，與理論描述相同。不同強(qiáng)度等級和不同直徑的鐵尾礦砂混凝土的粘結(jié)滑移，上升段相差不大，強(qiáng)度越低下降越快；與普通混凝土的全曲線相比，變化趨勢大致相同，與理論的粘結(jié)滑移曲線上升段和下降段變化大致相同。 總之，通過試驗(yàn)研究得知，鐵尾礦砂混凝土與鋼筋的粘結(jié)錨固性能與普通混凝凝土的基本一致。故在粘結(jié)錨固性能方面，鐵尾礦砂可完全替代普通河砂，即鐵尾礦砂混凝土可以用于建筑結(jié)構(gòu)中，從而達(dá)到了既解決了普通混凝土用砂緊缺的問題，又達(dá)到了合理利用鐵尾礦砂的目的。
[Abstract]:With the rapid development of the construction industry, the demand for concrete is also increasing day by day. The raw materials such as concrete sand and stone are in serious crisis. With the development of metallurgical industry, the production of iron tailings is increasing. The existence of iron tailings has seriously damaged the surrounding natural environment. The iron tailings concrete used in the test is to replace the ordinary river sand with iron tailings under the condition of adding certain additives. The research of iron tailings concrete at home and abroad is mainly focused on its material properties, but it is lack of research on the structural performance of iron tailings mineral sand concrete. The experiment mainly studies the bond and anchoring performance of steel bar and iron tailings concrete. The performance of concrete is compared with that of ordinary concrete, and the formula of bond Anchorage is studied at the same time. The bond anchoring behavior of steel bar and iron tailings concrete is studied. According to 72 bonded anchoring specimens, The bond-slip curves of two kinds of concrete with different strength grades (C20C30C40) and different diameters (12mm / 16mm / 20mm / 25mm) are analyzed. The bond-slip behavior of iron tailings concrete with different strength grades and different diameters is similar to that of concrete with different strength grades and diameters. The lower the strength is, the faster the strength decreases, and the change trend is roughly the same compared with the whole curve of ordinary concrete. The change of the upward and descending sections of the bond-slip curve is approximately the same as that of the theoretical bond-slip curve. In a word, the experimental study shows that the bond anchoring performance of iron tailings concrete and steel bar is basically the same as that of ordinary coagulant soil. Therefore, iron tailings can completely replace ordinary river sand in terms of bond and anchoring properties. That is to say, the iron tailings concrete can be used in the building structure, which not only solves the problem of the shortage of sand for ordinary concrete, but also achieves the purpose of making rational use of iron tailings.
【學(xué)位授予單位】：河北聯(lián)合大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TU528

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相關(guān)期刊論文 前2條

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本文編號：1527120