【摘要】：隨著交通量的不斷增長(zhǎng)、重載車輛的增多，加之水泥混凝土材料自身剛度大、易收縮開裂等特征以及復(fù)雜的環(huán)境耦合作用，導(dǎo)致我國(guó)水泥混凝土路面建成通車后在使用過程中出現(xiàn)的病害問題逐漸突出，特別是混凝土板的破碎問題。基于此，針對(duì)養(yǎng)護(hù)工程具體情況及施工要求，作者對(duì)現(xiàn)有材料進(jìn)行優(yōu)選，旨在研究一種滿足2h左右的罐車運(yùn)輸條件，澆筑1d后可開放交通，且使用性能良好的早強(qiáng)復(fù)摻修補(bǔ)混凝土，以解決當(dāng)前水泥混凝土板維修周期長(zhǎng)和耐久性差等問題。 首先，對(duì)優(yōu)選的原材料進(jìn)行了性能測(cè)試，并根據(jù)交通狀況、路面結(jié)構(gòu)類型、路面狀況、施工時(shí)間等提出了混凝土板材料的工作性、力學(xué)性和耐久性的技術(shù)指標(biāo)要求。然后，研究了配合比設(shè)計(jì)參數(shù)和外摻料對(duì)復(fù)摻混凝土性能的影響規(guī)律，據(jù)此提出了一套配合比設(shè)計(jì)方法。 其次，基于上述配比，研究了復(fù)摻混凝土的耐久性能。通過研究，得出結(jié)論：復(fù)摻混凝土的耐磨性能、抗沖擊能力、抗硫酸侵蝕等性能明顯優(yōu)于相同配比下的普通道路混凝土。 為揭示復(fù)摻混凝土的良好性能的內(nèi)在原因，借助XRD、SEM兩種測(cè)試手段對(duì)復(fù)摻水泥漿和砂漿的微觀結(jié)構(gòu)進(jìn)行了研究，分析了復(fù)摻水泥水化機(jī)理，并進(jìn)一步提出了理想的復(fù)摻混凝土微結(jié)構(gòu)模型，分析了微觀結(jié)構(gòu)與宏觀力學(xué)性能的聯(lián)系。 最后將研究的復(fù)摻混凝土用于依托高速公路的試驗(yàn)段修復(fù)，，得到了很好的應(yīng)用。
[Abstract]:With the continuous growth of traffic volume, the increase of heavy-duty vehicles, the characteristics of cement concrete materials such as high stiffness, easy shrinkage and cracking, and complex environmental coupling, the problems of cement concrete pavement in service process are gradually prominent, especially the breakage of concrete slabs. In view of the concrete conditions and construction requirements of the maintenance project, the author optimizes the existing materials in order to study a kind of tank truck transportation condition which can satisfy about 2 hours, open the traffic after pouring for 1 day, and use early-strength composite repair concrete with good performance to solve the problems of long maintenance period and poor durability of the current cement concrete slab.
Firstly, the performances of the preferred raw materials are tested, and the requirements of workability, mechanics and durability of concrete slab materials are put forward according to traffic conditions, pavement structure types, pavement conditions and construction time. A set of mix design method is put forward.
Secondly, based on the above-mentioned mixing ratio, the durability of the mixed concrete is studied. Through the study, it is concluded that the wear resistance, impact resistance and sulfuric acid corrosion resistance of the mixed concrete are obviously superior to the ordinary road concrete under the same mixing ratio.
In order to reveal the intrinsic reason of the good performance of the mixed concrete, the microstructure of the mixed cement mortar and mortar was studied by means of XRD and SEM, the hydration mechanism of the mixed cement was analyzed, and the ideal microstructure model of the mixed concrete was put forward, and the relationship between the microstructure and the macroscopic mechanical properties was analyzed.
Finally, the composite concrete is used to repair the test section relying on the expressway, and it has been applied very well.
【學(xué)位授予單位】：長(zhǎng)安大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U414;U416.216

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 付杰;黃浩;歐陽堅(jiān);;路面修補(bǔ)用高性能混凝土的應(yīng)用研究[J];公路交通科技(應(yīng)用技術(shù)版);2009年09期

2 孫家瑛;聚丙烯纖維對(duì)高性能混凝土抗折強(qiáng)度、抗沖擊性能影響研究[J];混凝土;1999年06期

3 陳云鋼,孫振平,肖建莊;再生混凝土界面結(jié)構(gòu)特點(diǎn)及其改善措施[J];混凝土;2004年02期

4 喬歡歡;盧忠遠(yuǎn);嚴(yán)云;舒朗;;特種水泥對(duì)普通硅酸鹽水泥性能的影響[J];混凝土;2008年03期

5 許仲梓，鄧敏，藍(lán)祥輝，唐明述，蘇慕珍;鐵鋁、硫鋁酸鹽混合水泥的研究[J];混凝土與水泥制品;1996年06期

6 吳宗道;硫鋁酸鹽水泥的水化產(chǎn)物——鋁膠[J];中國(guó)建材科技;1995年01期

7 李益進(jìn),周士瓊,尹健,高英力;超細(xì)粉煤灰高性能混凝土的力學(xué)性能[J];建筑材料學(xué)報(bào);2005年01期

8 唐明,王甲春,李連君;壓汞測(cè)孔評(píng)價(jià)混凝土材料孔隙分形特征的研究[J];沈陽建筑工程學(xué)院學(xué)報(bào)(自然科學(xué)版);2001年04期

9 唐明,李曉;多種因素對(duì)混凝土孔結(jié)構(gòu)分形特征的影響研究[J];沈陽建筑大學(xué)學(xué)報(bào)(自然科學(xué)版);2005年03期

10 張惠玲,黃新,許士洪;粉煤灰在水泥石中的增強(qiáng)作用[J];武漢理工大學(xué)學(xué)報(bào);2001年09期

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