本文選題：道路工程 + 水泥混凝土�。� 參考：《東北林業(yè)大學(xué)》2015年碩士論文

【摘要】：水泥混凝土路面因其眾多優(yōu)點(diǎn)已被廣泛應(yīng)用,由于路面水泥混凝土長(zhǎng)期暴露在自然環(huán)境中,使用壽命受自然因素和行車(chē)荷載影響,具有良好的耐久性才能保證其在服役期間的服務(wù)水平,因此路面水泥混凝土的耐久性問(wèn)題是目前混凝土材料研究的主要方向之一。決定道路水泥混凝土宏觀耐久性能的因素較多,除了受原材料和配合比的影響,前人的研究證明,混凝土硬化后形成的微觀結(jié)構(gòu)是影響其耐久性的本質(zhì)內(nèi)在因素。本文基于道路水泥混凝土的基本要求,通過(guò)變化混凝土配合比中引氣劑的劑量,配制了具有不同微觀結(jié)構(gòu)的道路水泥混凝土。微觀試驗(yàn)主要采用壓汞法、光學(xué)法和電子顯微鏡掃描法測(cè)試各組道路水泥混凝土微觀孔隙結(jié)構(gòu)參數(shù)、孔隙結(jié)構(gòu)分布及水泥漿體、界面過(guò)渡區(qū)域的形貌；宏觀試驗(yàn)主要采用快速凍融法和電通量法測(cè)試各組道路水泥混凝土抗凍性與抗?jié)B透性能。主要分析了各孔隙結(jié)構(gòu)指標(biāo)和微觀形貌對(duì)道路水泥混凝土抗凍性與抗?jié)B透性能的影響規(guī)律,并針對(duì)黑龍江地區(qū)的道路水泥混凝土推薦了各孔隙結(jié)構(gòu)參數(shù)的合理取值范圍。同時(shí),基于微觀層面提出了改善路面水泥混凝凝土微觀孔隙結(jié)構(gòu),進(jìn)而提高其宏觀耐久性能的措施,主要是添加礦物摻合料粉煤灰、納米SiO2、納米TiO2和改變水膠比的方式。
[Abstract]:Cement concrete pavement has been widely used because of its many advantages. Due to its long-term exposure to the natural environment, the service life of cement concrete pavement is affected by natural factors and traffic loads. The durability of pavement cement concrete is one of the main research directions of concrete materials. There are many factors determining the macroscopical durability of road cement concrete. Besides the influence of raw materials and mix ratio, previous studies have proved that the microstructure formed after concrete hardening is the essential internal factor affecting the durability of road cement concrete. Based on the basic requirements of road cement concrete, the road cement concrete with different microstructure was prepared by changing the dosage of air entraining agent in the mix ratio of concrete. Mercury injection method, optical method and scanning electron microscope method were used to measure the parameters of pore structure, pore structure distribution, cement paste and the morphology of interface transition area in each group of road cement concrete. The rapid freeze-thaw method and the electric flux method were used to test the frost resistance and permeability of road cement concrete in macroscopical tests. The influence of pore structure index and micro-morphology on frost resistance and permeability resistance of road cement concrete is analyzed, and the reasonable range of pore structure parameters is recommended for road cement concrete in Heilongjiang area. At the same time, based on the micro level, the measures to improve the micro pore structure and improve the macroscopic durability of the cement coagulant are put forward, mainly by adding the mineral admixture fly ash, nano Sio 2, nano TiO2 and changing the water / binder ratio.
【學(xué)位授予單位】：東北林業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：U414

【參考文獻(xiàn)】

相關(guān)期刊論文 前4條

1 李永鑫,陳益民,賀行洋,韋江雄,張文生,張洪滔,郭隨華;粉煤灰-水泥漿體的孔體積分形維數(shù)及其與孔結(jié)構(gòu)和強(qiáng)度的關(guān)系[J];硅酸鹽學(xué)報(bào);2003年08期

2 熊?chē)?guó)宣,鄧敏,宋碧濤,唐明述;納米材料在混凝土中應(yīng)用的思考[J];混凝土與水泥制品;2002年05期

3 吳中偉;綠色高性能混凝土與科技創(chuàng)新[J];建筑材料學(xué)報(bào);1998年01期

4 侯學(xué)彪;黃丹;王委;;摻納米SiO_2高性能混凝土研究進(jìn)展[J];混凝土;2013年03期

相關(guān)碩士學(xué)位論文 前2條

1 郭劍飛;混凝土孔結(jié)構(gòu)與強(qiáng)度關(guān)系理論研究[D];浙江大學(xué);2004年

2 何俊輝;道路水泥混凝土微觀結(jié)構(gòu)與性能研究[D];長(zhǎng)安大學(xué);2009年

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本文編號(hào)：1918605