發(fā)布時間：2018-04-07 18:19

  本文選題：鋼纖維　切入點：骨料粒徑　出處：《安徽理工大學(xué)》2017年碩士論文

【摘要】：在當代社會建設(shè)中,隨著科學(xué)技術(shù)的進步與發(fā)展,建筑行業(yè)里也出現(xiàn)了一個又一個新的世界紀錄,建筑行業(yè)正向著更高、更強、更好的方向去創(chuàng)新發(fā)展。鋼纖維混凝土應(yīng)運而生,鋼纖維混凝土是將亂向分布的短鋼纖維摻入到普通混凝土中形成的一種新型的多相復(fù)合材料。這些亂向分布的鋼纖維能夠有效地阻礙混凝土內(nèi)部宏觀裂縫的形成及微裂縫的擴展,能夠較好地改善了混凝土的抗拉、抗彎、抗沖擊及抗疲勞性能,具有較好的延性,因此鋼纖維混凝土在抗震結(jié)構(gòu)中得到了廣泛的應(yīng)用。目前,眾觀當代國內(nèi)外學(xué)者,已有很多對鋼纖維混凝土有了比較深入的研究,本文將結(jié)合前人的研究,著重對微鋼纖維與骨料粒徑匹配效應(yīng)的研究。通過在混凝土中加入不同含量的鋼纖維與不同大小粒徑粗骨料,進而更加深入地研究鋼纖維混凝土與粗骨料粒徑匹配關(guān)系及相關(guān)性能的影響。本文選取1種微鋼纖維直徑為0.2 mm,長度為13 mm(長徑比為65)及4種不同粒徑的粗骨料,骨料粒徑分別為0mm、5-10 mm、10-15 mm、15-20 mm。實驗設(shè)計了 2種不同強度等級的混凝土,強度分別為C30、C50;3種不同的纖維摻量,摻量分別為0%、1%、2%,實驗過程分別研究C30、C50混凝土在摻雜不同粒徑粗骨料與不同含量鋼纖維之后相關(guān)性能。本實驗分4批完成,在C30、C50混凝土中分4種不同粒徑的粗骨料混凝土,在每種粒徑骨料的混凝土中加入3種不同含量的鋼纖維,共設(shè)計了 24組,其中C30、C50混凝土各12組,在每組試件中制作了 3個150mm**150 mm*300 mm應(yīng)力應(yīng)變試塊、3 個 150 mm*150 mm*300 mm劈裂抗拉試塊、3 個 100 mm*100 mm*400 mm長方體彎曲韌性試塊、2個150 mm*150 mm*300mm用作切割的外觀試塊(此試塊在本文中不作過多闡述),共有264個試塊。通過對各試塊性能研究,得出圓柱體軸心抗壓強度與粗骨料粒徑關(guān)系,圓柱體軸心抗壓強度與纖維摻量關(guān)系,圓柱體軸心抗壓強度與骨料粒徑和纖維摻量兩者匹配效應(yīng)關(guān)系;劈裂抗拉強度與粗骨料粒徑關(guān)系,劈裂抗拉強度與纖維摻量關(guān)系,劈裂抗拉強度與骨料粒徑和纖維摻量兩者匹配效應(yīng)關(guān)系;彎曲韌性與粗骨料粒徑關(guān)系,彎曲韌性與纖維摻量關(guān)系,應(yīng)力-應(yīng)變與粗骨料粒徑關(guān)系,應(yīng)力-應(yīng)變與纖維摻量關(guān)系。研究成果對工程實際應(yīng)用和理論研究有著一定的參考價值。
[Abstract]:In the construction of contemporary society, with the progress and development of science and technology, the construction industry has also appeared a new world record one after another. The construction industry is moving towards higher, stronger and better direction to innovate and develop.Steel fiber reinforced concrete (SFRC) is a new type of multiphase composite material, which is formed by mixing short steel fibers randomly distributed into ordinary concrete.These disorderly distributed steel fibers can effectively hinder the formation of macroscopic cracks and the propagation of micro-cracks in concrete, and can improve the tensile, flexural, impact and fatigue resistance of concrete, and have good ductility.Therefore, steel fiber reinforced concrete (SFRC) has been widely used in seismic structures.At present, many scholars at home and abroad, there have been a lot of more in-depth research on steel fiber concrete, this paper will combine with previous research, focusing on the micro-steel fiber and aggregate particle size matching effect.By adding different content of steel fiber and coarse aggregate of different size into concrete, the matching relation between steel fiber concrete and coarse aggregate and the influence of relative properties were studied.In this paper, a kind of micro-steel fiber with a diameter of 0.2 mm, a length of 13 mm (ratio of length to diameter 65) and four kinds of coarse aggregate with different sizes are selected. The diameter of aggregate is 0 mm ~ 5 ~ 10 mm ~ 10 mm ~ (-15) mm ~ (15) mm ~ (15) mm ~ (-1).Three 150mm**150 mm*300 mm stress-strain test blocks were made in each set of specimens, and three 150 mm*150 mm*300 mm split tensile test blocks and three 100 mm*100 mm*400 mm cuboid bending ductile blocks were made, and 2 150 mm*150 mm*300mm were used as external cut test blocks.There are 264 test pieces in this paper.The relationship between axial compressive strength of cylinder and diameter of coarse aggregate, axial compressive strength of cylinder and fiber content, matching effect of axial compressive strength of cylinder with diameter of aggregate and fiber content are obtained by studying the properties of each sample.The relationship between splitting tensile strength and coarse aggregate particle size, split tensile strength and fiber content, the matching effect between splitting tensile strength and aggregate diameter and fiber content, the relationship between bending toughness and coarse aggregate particle size, the relationship between splitting tensile strength and fiber content, the relationship between splitting tensile strength and fiber content, the relationship between splitting tensile strength and fiber content, the relationship between splitting tensile strength and fiber content,The relationship between flexural toughness and fiber content, between stress-strain and coarse aggregate particle size, and between stress-strain and fiber content.The research result has certain reference value to the engineering practical application and the theory research.
【學(xué)位授予單位】：安徽理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TU528

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本文編號：1720322