本文關(guān)鍵詞： 混雜纖維混凝土 玄武巖纖維 聚丙烯腈纖維 基本力學性能 抗?jié)B 抗裂　出處：《哈爾濱工業(yè)大學》2016年碩士論文　論文類型：學位論文

【摘要】：兩種或多種纖維混雜由于能夠優(yōu)勢互補在原來的基礎上改善了混凝土的各項性能,因而愈加受到人們重視。在提高混凝土性能的同時,將成本控制在較低水平既能節(jié)約資源也可減輕工程建設單位的負擔。由此本文結(jié)合纖維混凝土已有的研究成果,開展玄武巖—聚丙烯腈纖維混雜纖維混凝土基本力學性能及抗?jié)B抗裂性的研究,分析混雜纖維對混凝土的增強作用,以及纖維對混凝土抗?jié)B、抗裂性的影響。(1)以C40混凝土為基準,利用混雜纖維摻量變化與摻配比例變化、粉煤灰與混雜纖維復摻以及粉煤灰、膨脹劑與混雜纖維三者復摻對混凝土基本力學性能進行了研究,并分析了增強機理;(2)利用平板開裂試驗,對混雜纖維混凝土早期開裂進行了研究,結(jié)果表明混雜纖維與膨脹劑復摻能夠明顯延遲混凝土開裂時間,減少開裂面積;(3)利用電通量法及毛細吸水試驗,對混雜纖維混凝土進行了抗?jié)B性試驗,研究混雜纖維、粉煤灰及膨脹劑對混凝土抗?jié)B性的影響,結(jié)果表明三者復摻比單獨摻加能更有效提高抗?jié)B性。
[Abstract]:Because two or more fibers can complement each other and improve the performance of concrete on the basis of the original, it has been paid more and more attention to. While improving the performance of concrete, Controlling the cost at a lower level can not only save resources but also lighten the burden of engineering construction units. Therefore, this paper combines with the existing research results of fiber reinforced concrete. The basic mechanical properties and anti-seepage and crack resistance of basalt polyacrylonitrile fiber hybrid fiber reinforced concrete were studied, and the reinforcement effect of hybrid fiber to concrete and fiber to concrete impermeability were analyzed. Based on C40 concrete, the content and proportion of hybrid fiber are changed, fly ash and hybrid fiber are mixed and fly ash is mixed with fly ash. This paper studies the basic mechanical properties of concrete mixed with expansive agent and hybrid fiber, and analyzes the strengthening mechanism of concrete. (2) the early cracking of hybrid fiber concrete is studied by means of plate cracking test. The results show that hybrid fiber and dilatant admixture can obviously delay the cracking time of concrete and reduce the cracking area. The permeability of hybrid fiber concrete is studied by using electric flux method and capillary water absorption test. The effect of fly ash and expansive agent on the impermeability of concrete is studied. The results show that the composite admixture of fly ash and expansive agent can effectively improve the impermeability of concrete.
【學位授予單位】：哈爾濱工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2016
【分類號】：TU528
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本文編號：1544300