本文選題：改性橡膠混凝土 + 配制方法�。� 參考：《鄭州大學》2015年碩士論文

【摘要】：通過改性劑處理橡膠顆粒,能夠增強橡膠顆粒與水泥石的粘結作用,提高橡膠混凝土的各項性能。前期試驗成果顯示,改性橡膠混凝土具有良好的抗凍性,在水利工程中有較好的應用前景,但對其強度等力學性能的研究尚不完善。因此,本文在水利公益性行業(yè)科研專項經費項目(201301027)的資助下,對改性橡膠混凝土的配制方法和物理力學性能進行了研究。主要工作和結論如下:(1)研究了改性橡膠混凝土的配制方法。首先對項目的強度目標進行分析,得到改性橡膠混凝土配合比的確定原則:使基準橡膠混凝土與基準混凝土的強度比為0.71~0.83。然后根據不同橡膠粒徑和摻量的橡膠混凝土的坍落度和強度試驗,確定了改性橡膠混凝土的配合比。最后根據已有的試驗成果,確定了橡膠混凝土的3種改性方式:Na OH改性、KH570改性和復合改性。(2)試驗研究了改性橡膠混凝土的拌和物性能,發(fā)現改性橡膠混凝土較基準橡膠混凝土拌和物密度下降、坍落度升高。Na OH改性橡膠混凝土、KH570改性橡膠混凝土和復合改性橡膠混凝土的拌和物密度下降的幅度分別為0.59%、3.1%、2.3%,坍落度上升的幅度分別為24.4%、75.6%、70.7%。(3)試驗研究了改性橡膠混凝土的強度。結果顯示,Na OH改性橡膠混凝土和復合改性橡膠混凝土的強度較基準橡膠混凝土稍有下降,其中Na OH改性橡膠混凝土的28d立方體抗壓強度、劈拉強度和軸壓強度分別為基準橡膠混凝土的94.9%、98.8%和95.1%,復合改性橡膠混凝土分別為基準橡膠混凝土的88.5%、93.4%和90.9%。KH570改性橡膠混凝土的強度與基準橡膠混凝土相當,其分別為基準橡膠混凝土的100.3%、98.4%和102.7%。分析認為,改性劑在增強橡膠顆粒與水泥石粘結作用的同時會削弱混凝土的密實性。(4)試驗研究了改性橡膠混凝土的應力應變特性,采用過鎮(zhèn)海的混凝土本構模型擬合了改性橡膠混凝土的本構方程,理論公式與試驗結果吻合較好。與普通橡膠混凝土相比,改性橡膠混凝土峰值應變增加、彈性模量下降。Na OH改性橡膠混凝土、KH570改性橡膠混凝土和復合改性橡膠混凝土的峰值應變提高的幅度分別為19.7%、0.5%和9.8%,彈性模量下降的幅度分別為13.5%、3.3%和10.2%。
[Abstract]:By treating rubber particles with modifier, the bond between rubber particles and cement stone can be strengthened, and the properties of rubber concrete can be improved. The preliminary test results show that the modified rubber concrete has good frost resistance and has a good application prospect in water conservancy projects, but the study on its strength and other mechanical properties is not perfect. Therefore, the preparation method and physical and mechanical properties of modified rubber concrete are studied in this paper, supported by the special research project of water conservancy and public welfare industry (201301027). The main work and conclusion are as follows: 1) the preparation method of modified rubber concrete is studied. Firstly, the strength target of the project is analyzed, and the principle of determining the mix ratio of modified rubber concrete is obtained: the strength ratio of the standard rubber concrete to the standard concrete is 0.71g 0.83. Then according to the slump and strength test of rubber concrete with different rubber particle size and content, the mix ratio of modified rubber concrete was determined. Finally, according to the existing experimental results, three kinds of modification methods of rubber concrete were determined, that is, the modification of KH 570 and the modification of KH 570 and compound modification of rubber concrete. The mixing properties of modified rubber concrete were studied. It is found that the density of the modified rubber concrete is lower than that of the reference rubber concrete. The strength of modified rubber concrete was studied by means of increasing slump. NaOH modified rubber concrete and compound modified rubber concrete. The decrease range of mixing density was 0.59 and 3.1and 2.3.The slump increased by 24.45.6and 70.7. The results showed that the strength of Na-OH modified rubber concrete and compound modified rubber concrete was slightly lower than that of reference rubber concrete, and the 28d cube compressive strength of NaOH modified rubber concrete was found. The splitting tensile strength and axial compression strength of the standard rubber concrete are 94.998% and 95.1% of the standard rubber concrete, respectively. The composite modified rubber concrete is 88.593 4% of the reference rubber concrete and the strength of the 90.9%.KH570 modified rubber concrete is the same as that of the reference rubber concrete. It is 98.4% of the standard rubber concrete and 102.7% of the standard rubber concrete. The analysis shows that the modifier can weaken the compactness of concrete while reinforcing the bond between rubber particles and cement stone. The stress-strain characteristics of modified rubber concrete are studied. The constitutive equation of modified rubber concrete is fitted by using the constitutive model of concrete over Zhenhai. The theoretical formula is in good agreement with the experimental results. Compared with ordinary rubber concrete, the peak strain of modified rubber concrete increases. The peak strain of the modified rubber concrete and the composite modified rubber concrete were increased by 19.7% and 9.8%, respectively, and the decrease of the elastic modulus were 13.5% and 10.2%, respectively.
【學位授予單位】：鄭州大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TU528

【參考文獻】

相關期刊論文 前6條

1 徐溢,滕毅,徐銘熙;硅烷偶聯劑應用現狀及金屬表面處理新應用[J];表面技術;2001年03期

2 劉剛,方坤河,高鐘偉;高強混凝土的增韌減脆措施研究[J];混凝土;2004年05期

3 熊杰,鄭磊,袁勇;廢橡膠混凝土抗壓強度試驗研究[J];混凝土;2004年12期

4 李麗娟;謝偉鋒;陳智澤;陳應欽;盧慧祥;王瑞華;;橡膠粉改性高強混凝土高溫前后性能研究[J];混凝土;2007年02期

5 亢景付;王秀芬;韓春翠;張振利;;碾壓橡膠混凝土的強度特性[J];天津大學學報;2008年07期

6 潘東平;劉鋒;李麗娟;陳應欽;;橡膠混凝土的應用和研究概況[J];橡膠工業(yè);2007年03期

相關碩士學位論文 前4條

1 劉春生;橡膠集料混凝土的研究與應用[D];天津大學;2006年

2 潘東平;橡膠混凝土的本構關系研究[D];廣東工業(yè)大學;2007年

3 趙麗妍;摻廢舊輪胎橡膠粉改性水泥混凝土試驗研究[D];大連理工大學;2009年

4 周艷兵;碾壓橡膠混凝土抗裂性能研究[D];天津大學;2009年

，

本文編號：1816506