本文選題：再生磚 + 植生混凝土�。� 參考：《山東農業(yè)大學》2014年碩士論文

【摘要】：隨著我國經濟的快速發(fā)展和城市建設步伐的加快、新農村建設工作的不斷深入及舊農村改造,地面被大量的建筑物和混凝土道路所覆蓋,城市綠色植被面積明顯減少,熱島效應加劇,同時城鄉(xiāng)拆遷產生了大量的廢棄磚,造成了資源的浪費；利用廢棄磚作為植生混凝土再生骨料既可以解決廢棄粘土磚造成的污染,又可以改善生態(tài)環(huán)境。植生混凝土在國外已經發(fā)展的比較成熟,而在國內的卻剛剛起步,許多學者已經取得一些成果,但利用廢棄磚再生骨料制備植生型多孔連續(xù)型混凝土方面的研究還未見相關報道,因此,研究再生磚骨料植生混凝土非常有必要。 本文在借鑒國外研究成果的同時,立足于國內的研究現(xiàn)狀,針對再生磚骨料植生混凝土結構的特點,著重研究再生磚瓦骨料植生混凝土的制備方法、降堿和植生技術,為工程應用提供參考。試驗研究結果表明： (1)針對碎磚集料吸水率高、強度低的特點,提出了采用二次裹漿法提升再生磚骨料性能。針對再生磚骨料植生混凝土在國內的研究較少這一現(xiàn)狀,目前還沒有統(tǒng)一合理的配合比設計方法,提出了以空隙率為主要設計參數(shù),強度為次要設計參數(shù)的設計思路。水灰比初配試驗證明：當水灰比在0.29-0.33時,水泥砂漿具有一定的流動性和粘聚性；最佳水灰比為0.31,目標空隙率為30%,再生磚骨料植生混凝土的強度為4.92MPa,滿足了工程護坡的要求。針對再生磚骨料植生混凝土空隙率大、骨料吸水率高的特點,配合比可用“飽和骨料體積法”計算。 (2)本文在分析植生混凝土內部孔隙堿類物質的來源、存在形態(tài)后,設計了用清水浸泡和用FeSO4溶液處理兩種方法改造再生磚骨料植生混凝土孔隙內堿性的對比試驗。試驗表明：用清水隔天換水可以將再生磚骨料植生混凝土孔隙內的PH降到9-10之間；用FeSO4溶液處理后的植生混凝土孔隙內的PH能達到8-9之間,但對強度有定的破壞。綜合考慮,用清水浸泡處理是一種改善再生磚骨料植生混凝土孔隙內堿性水環(huán)境的有效方法,工程中可以通過延長自然養(yǎng)護時間達到降堿目的。 (3)針對工程應用中實際要求,分析了種植基質、草種的種類和選材原則,研究不同的種植基質對再生磚骨料植生混凝土上的植物生長狀況的植生試驗,試驗表明：將種植基質、土壤與種子等按照一定比例攪拌均勻后,采取灌漿法或分層播種法填充在再生磚骨料植生混凝土內部空隙,加上必要的養(yǎng)護與管理,植物可以在上健康良好的生長。
[Abstract]:With the rapid development of our economy and the acceleration of the pace of urban construction, the construction of new rural areas and the reconstruction of old rural areas, the ground is covered by a large number of buildings and concrete roads, and the area of urban green vegetation is obviously reduced. The heat island effect is intensified, at the same time, a large number of abandoned bricks are produced in urban and rural demolition, resulting in a waste of resources. The use of waste bricks as recycled aggregate of planting concrete can not only solve the pollution caused by abandoned clay bricks, but also improve the ecological environment. Planting concrete has developed more mature in foreign countries, but it has just started in China. Many scholars have already made some achievements. However, the research on the preparation of porous continuous concrete with recycled brick aggregate has not been reported. Therefore, it is necessary to study the recycled brick aggregate planting concrete. According to the characteristics of recycled brick aggregate planting concrete structure, the preparation method, alkali reduction and planting technology of recycled brick and tile aggregate planting concrete are studied in this paper. It provides reference for engineering application. The experimental results show that: 1) aiming at the characteristics of high water absorption rate and low strength of broken brick aggregate, a new method is proposed to improve the properties of recycled brick aggregate. In view of the fact that there is little research on recycled brick aggregate planting concrete in our country, there is no uniform and reasonable design method of mix ratio at present. The design idea of taking porosity as the main design parameter and strength as the secondary design parameter is put forward. The initial water-cement ratio test shows that when the water-cement ratio is 0.29-0.33, the cement mortar has certain fluidity and cohesion, the optimum water-cement ratio is 0.31, the target void ratio is 30 and the strength of regenerated brick aggregate is 4.92 MPa, which meets the requirements of engineering slope protection. In view of the characteristics of large void ratio and high water absorption of recycled brick aggregate, the mixture ratio can be calculated by saturated aggregate volume method. 2) after analyzing the source and form of alkali material in the pore of regenerated concrete, a comparative experiment was designed to reconstruct the alkalinity in the pore of regenerated brick aggregate by soaking in water and treating with FeSO4 solution. The results show that the PH in the pore of regenerated brick aggregate can be reduced to 9-10 by changing water every other day, and the PH in the pore of regenerated concrete treated with FeSO4 solution can reach 8-9, but the strength of the pore can be destroyed. Comprehensive consideration is that soaking with clear water is an effective method to improve the alkaline water environment in the pore of regenerated brick aggregate planting concrete. The purpose of reducing alkali can be achieved by prolonging the natural curing time in engineering. (3) according to the practical requirements of engineering application, this paper analyzes the kinds of planting matrix, grass seed and material selection principle, and studies the planting test of plant growth condition on regenerated brick aggregate planting concrete with different planting matrix. After the soil and seed were stirred evenly according to a certain proportion the plants could grow healthily on the ground by filling the inner voids in the regenerated brick aggregate planting concrete by grouting or stratified seeding together with the necessary maintenance and management.
【學位授予單位】：山東農業(yè)大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TU528

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本文編號：1975321