本文選題：嚴(yán)寒地區(qū) + 水泥混凝土　； 參考：《長安大學(xué)》2015年碩士論文

【摘要】：內(nèi)蒙古作為資源輸出大省,水泥混凝土道路在此有著重要意義。但內(nèi)蒙古地區(qū)環(huán)境氣候惡劣,冬季漫長寒冷,水泥混凝土路面面臨嚴(yán)重的凍害侵襲。為減少路面冰凍病害、提高混凝土耐久性、延長道路使用壽命、節(jié)約路面養(yǎng)護(hù)維修資金,水泥混凝土路面抗凍性能研究具有非常重要的理論和現(xiàn)實(shí)意義。以白音華至霍林郭勒一級公路作為工程依托,首先進(jìn)行了環(huán)境氣候條件調(diào)查,建立了公路氣象站,對太陽輻射、環(huán)境溫度、濕度、風(fēng)速、風(fēng)向、降雨量、蒸發(fā)量、路面內(nèi)部溫度進(jìn)行了長期觀測,鋪筑了氣象觀測試驗(yàn)路,分析了影響水泥路面混凝土路面材料抗凍融性能的關(guān)鍵因素。通過對水泥混凝土路面凍融破壞特征分析,剖析了其產(chǎn)生凍融破壞作用機(jī)理。通過室內(nèi)模擬試驗(yàn),分析了混凝土材料組成、強(qiáng)度等級、環(huán)境條件等對混凝土路面凍融破壞的影響,發(fā)現(xiàn)了凍融作用下混凝土路面性能衰減規(guī)律。最后提出了優(yōu)化材料組成設(shè)計(jì)、添加引氣劑、加強(qiáng)施工控制等預(yù)防水泥混凝土抗凍性的技術(shù)措施。研究結(jié)果表明混凝土材料組成對抗凍性能影響比較明顯,合適的水泥品種可以提高混凝土的抗凍性;吸水率低、力學(xué)性能好的集料有助于提高混凝土的抗凍性;CNF-3引氣緩凝高效減水劑,有效改善硬化混凝土的氣孔結(jié)構(gòu)和分布,從而使抗凍融性能得到了大幅的提高,增強(qiáng)混凝土的耐久性能。集料配合比和施工質(zhì)量可顯著影響水泥混凝土的抗凍耐久性。因此,為提高水泥混凝土抗凍性能需要嚴(yán)格控制混凝土材料組成、水灰比、含氣量、飽水狀態(tài)等因素。
[Abstract]:As a large province of resource output in Inner Mongolia, cement concrete roads are of great significance here. However, the environmental climate in Inner Mongolia is bad, the winter is long and cold, the cement concrete pavement is faced with severe frost damage. In order to reduce the freezing disease of the pavement, improve the durability of concrete, prolong the service life of the road, save the funds for the maintenance and maintenance of the pavement. It is of great theoretical and practical significance to study the frost resistance performance of the muddy concrete pavement. Based on the project of Bai Yin Hua to the first grade highroad of the hall, the environment and climate conditions are investigated and a highway weather station is set up. The solar radiation, ambient temperature, humidity, wind speed, wind direction, rainfall, evaporation, and internal temperature of the pavement are carried out. In the long term observation, the meteorological observation test road was paved, and the key factors affecting the frost resistance and thawing properties of concrete pavement materials were analyzed. The freezing thawing damage mechanism of cement concrete pavement was analyzed, and the composition of concrete material, strength grade and environmental strip were analyzed through indoor simulation test. The effect of parts on the freeze-thaw damage of concrete pavement was found, and the performance attenuation law of concrete pavement under freezing and thawing was found. Finally, the technical measures were put forward to optimize the composition design of the material, add air entraining agent, strengthen the construction control and so on to prevent the frost resistance of cement concrete. The results showed that the effect of the composition of the concrete on the frost resistance was obvious. The suitable cement varieties can improve the frost resistance of concrete; the aggregate with low water absorption and good mechanical properties helps to improve the frost resistance of concrete; CNF-3 air entraining retarding high efficiency water reducing agent can effectively improve the pore structure and distribution of hardened concrete, so that the resistance to freezing and thawing can be greatly improved and the durability of concrete is enhanced. The mixture ratio and construction quality can significantly affect the frost resistance and durability of cement concrete. Therefore, in order to improve the frost resistance of cement concrete, the composition of concrete material, water cement ratio, gas content and the state of satiety need to be strictly controlled.
【學(xué)位授予單位】：長安大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U416.216

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 宋擁軍;含氣量對混凝土抗凍性能的影響[J];中國三峽建設(shè);1999年11期

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本文編號：1910343