本文選題：纖維橡膠混凝土 + 橡膠粉　； 參考：《哈爾濱工業(yè)大學(xué)》2015年碩士論文

【摘要】：現(xiàn)如今,人們對(duì)于建筑工程的質(zhì)量和安全要求越來(lái)越高。一方面工程的質(zhì)量要對(duì)人身安全有所保障,另一方面還要盡可能符合國(guó)家提倡的綠色、環(huán)保、經(jīng)濟(jì)和可持續(xù)發(fā)展的戰(zhàn)略要求。隨著汽車數(shù)量的提升,廢舊輪胎數(shù)量急劇上升,廢舊輪胎的處理一直以來(lái)都是一個(gè)難題。對(duì)廢舊輪胎進(jìn)行回收,生產(chǎn)成為橡膠顆粒和細(xì)膠粉加入混凝土中,不僅能改善混凝土的一些性能,而且這種做法能有效的減少了污染,積極響應(yīng)了國(guó)家可持續(xù)發(fā)展的政策。玄武巖纖維是一種近年來(lái)發(fā)展起來(lái)的新型、無(wú)機(jī)、綠色的高性能纖維材料,與現(xiàn)在研究較多的聚丙烯纖維和鋼纖維相比,它的穩(wěn)定性好、耐老化、電絕緣性、耐高溫等許多優(yōu)異的性能,對(duì)纖維混凝土的使用壽命和耐久性能有很大的提高�；谝陨蟽煞N材料的性質(zhì),在普通混凝土中同時(shí)摻入橡膠粉和玄武巖纖維,得到新型復(fù)合型混凝土-玄武巖纖維橡膠混凝土,在不同水灰比(0.32和0.38)條件下,對(duì)不同摻量、不同長(zhǎng)度玄武巖纖維橡膠混凝土的力學(xué)性能、抗?jié)B性能和抗沖擊性能進(jìn)行試驗(yàn)研究。研究表明,隨著橡膠粉的摻入,混凝土的力學(xué)性能,尤其是抗壓強(qiáng)度降低程度較大,而抗?jié)B性、抗沖擊性能顯著提高。在此基礎(chǔ)上摻入玄武巖纖維,對(duì)混凝土有較好的阻裂和增強(qiáng)增韌的效果。綜合各項(xiàng)性能來(lái)看,兩種水灰比混凝土的纖維最優(yōu)摻量有所不同,水灰比為0.32時(shí)最優(yōu)摻量為0.12%左右,而水灰比提高到0.38,則最優(yōu)摻量為0.10%。纖維的長(zhǎng)度越短,其抗沖擊性能越好。最后通過(guò)Abaqus有限元軟件對(duì)混凝土抗沖擊過(guò)程進(jìn)行模擬,得出在相同沖擊荷載作用下,纖維混凝土的損傷增長(zhǎng)率比普通混凝土降低。最后通過(guò)纖維間距理論對(duì)不同水灰比條件下,纖維最優(yōu)摻量的不同進(jìn)行初步探討和數(shù)值分析。
[Abstract]:Nowadays, the quality and safety of construction projects are becoming more and more demanding.On the one hand, the quality of the project should be guaranteed to the personal safety, on the other hand, it should meet the strategic requirements of green, environmental protection, economy and sustainable development advocated by the state as much as possible.With the increase of the number of cars, the number of waste tires has increased sharply, and the disposal of used tyres has been a problem all along.Recycling waste tires and producing rubber particles and fine rubber powder into concrete can not only improve some properties of concrete, but also reduce pollution effectively and respond positively to the national policy of sustainable development.Basalt fiber is a new kind of high performance fiber material which has been developed in recent years. Compared with polypropylene fiber and steel fiber, it has good stability, aging resistance and electrical insulation.Many excellent properties, such as high temperature resistance, can greatly improve the service life and durability of fiber reinforced concrete.Based on the properties of the above two kinds of materials, rubber powder and basalt fiber are mixed in ordinary concrete at the same time, and a new type of composite concrete-basalt fiber rubber concrete is obtained. Under different water / cement ratio of 0.32 and 0.38), the content of rubber concrete is different.The mechanical properties, impermeability and impact resistance of basalt fiber rubber concrete with different lengths were studied.The results show that with the addition of rubber powder, the mechanical properties of concrete, especially the compressive strength, decrease greatly, while the impermeability and impact resistance of concrete are improved significantly.On this basis, basalt fiber is added to the concrete, which has a good effect of preventing crack and strengthening and toughening.According to the comprehensive properties, the optimum fiber content of the two kinds of water-cement ratio concrete is different. When the water-cement ratio is 0.32, the optimal content is about 0.12%, while the water-cement ratio is increased to 0.38, the optimal content is 0.10%.The shorter the fiber length, the better the impact resistance.Finally, the impact resistance process of concrete is simulated by Abaqus finite element software. It is concluded that the damage growth rate of fiber reinforced concrete is lower than that of ordinary concrete under the same impact load.Finally, through the theory of fiber spacing, the difference of optimal fiber content under different water-cement ratio is discussed and analyzed numerically.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TU528.57

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本文編號(hào)：1759618