【摘要】：我國現(xiàn)階段的綜合實力不斷增強,經(jīng)濟、文化、政治不斷完善和發(fā)展,其中經(jīng)濟發(fā)展勢頭最為迅猛,也為我們城市帶來了日新月異的變化,城市道路、基礎(chǔ)設(shè)施等的建設(shè)作為城市“硬件”也在不斷更新,與此同時,也產(chǎn)生了諸多不良的影響。例如:我們城市道路大多數(shù)道路路面材料為瀝青混凝土材料,而瀝青混凝土路面的不透氣性和不透水性,直接導(dǎo)致了空氣中的水分、降水并不能直接透過混凝土路面進入土壤之中,這便直接導(dǎo)致地表植物因缺乏水分而不健康生長或凋零死亡,空氣水分和熱量難以與地表進行良性的循環(huán),從而導(dǎo)致了地表溫度升高,產(chǎn)生了“熱島效應(yīng)”。最重要的是混凝土路面的不透水性和不透氣性導(dǎo)致了每逢雨季路面排水困難,只能依靠排水設(shè)施,如遇短時間大量降水,難于解決路面積水問題,從而大大降低了路面行車的舒適性,增大了行人雨天出行危險性,對道路交通和社會安全具有極大的隱患。本文針對混凝土路面的不透氣性和不透水性給城市帶來的 熱島效應(yīng)‖、路面積水等問題,研究和制備高透水性的透水混凝土路面鋪裝材料以緩解上述問題,開展的具體研究工作如下:1.透水混凝土路面材料配合比設(shè)計。本文著重從材料方面入手,分別采用了碎石、輕型黏土陶粒、高強陶粒作為骨料,水泥凈漿、樹脂作為骨料粘結(jié)劑,制作不同種類的透水混凝土試件并設(shè)計實驗方案進行抗壓強度和透水系數(shù)試驗,對不同類型的透水混凝土的抗壓強度和透水系數(shù)進行分析,得出性能最優(yōu)的透水混凝土的配比。2.透水混凝土數(shù)值分析。利用離散元顆粒流軟件(PFC 3D)建立透水混凝土模型,并且模擬透水混凝土抗壓強度試驗,生成了透水混凝土試件在抗壓條件下的應(yīng)力變化曲線,與實測混凝土試件抗壓強度進行對比分析,驗證離散元模擬方法的可行性。3.透水混凝土耐久性試驗。分別選取水泥和樹脂膠結(jié)高強陶粒骨料這兩種透水混凝土試件進行凍融循環(huán)試驗,對比分析兩種不同的膠結(jié)材對透水混凝土的抗凍性的影響,分析產(chǎn)生試驗結(jié)果差異的原因,得出最佳的膠結(jié)方式。
[Abstract]:At the present stage of our country, the comprehensive strength is continuously strengthened, the economy, culture, and politics are constantly improved and developed. Among them, the economic development momentum is the most rapid, and it has also brought rapid changes to our cities, urban roads, The construction of infrastructure as the city's "hardware" is also constantly updated, at the same time, has also produced a lot of adverse effects. For example, most of our urban roads are made of asphalt concrete, and the impermeability and water permeability of asphalt concrete pavements directly lead to moisture in the air. Precipitation does not enter the soil directly through concrete pavements, which directly leads to the unhealthy growth or death of surface plants due to lack of water, and it is difficult for air moisture and heat to circulate well with the surface. As a result, the surface temperature increases and the "heat island effect" is produced. The most important thing is that the impermeability and impermeability of the concrete pavement make it difficult to drain the pavement during the rainy season, so it is difficult to solve the problem of water accumulation on the road surface if a large amount of precipitation occurs in a short period of time. Thus greatly reduces the road ride comfort, increases the pedestrian rainy weather travel danger, has the huge hidden danger to the road traffic and the social safety. In this paper, aiming at the problems of impermeability and impermeability of concrete pavement, such as heat island effect and water accumulation on the road surface, we study and prepare the high permeability permeable concrete pavement surfacing material in order to alleviate the above problems. The specific research work is as follows: 1. Design of mixture ratio of permeable concrete pavement material. In this paper, gravel, lightweight clay ceramsite, high strength ceramsite as aggregate, cement paste and resin as aggregate binder are adopted. The compressive strength and permeability coefficient of different kinds of permeable concrete were tested by designing the experimental scheme, and the compressive strength and permeability coefficient of different types of permeable concrete were analyzed. The optimum ratio of permeable concrete is obtained. 2. Numerical analysis of permeable concrete. The model of permeable concrete is established by using discrete element particle flow software (PFC 3D), and the compressive strength test of permeable concrete is simulated. The feasibility of the discrete element simulation method is verified by comparing and analyzing the compressive strength of concrete specimens measured. 3. Durability test of permeable concrete. Two kinds of pervious concrete specimens, cement and resin cemented high-strength ceramsite aggregate, were selected for freeze-thaw cycle test. The effects of two different cemented materials on the frost resistance of permeable concrete were analyzed, and the reasons for the difference of test results were analyzed. Come up with the best way of cementing.
【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：U414

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