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在沼气池的建筑和使用中,由于施工和使用不慎,往往会造成沼气池裂缝或局部损坏,致使沼气池不能使用。用普通的水泥修补会使新浇的水泥砂浆混凝土不能很好地粘合,达不到密封的目的。而用明矾石膨胀水泥修补沼气池裂缝或局部损坏部分,能使添补的水泥砂浆或混凝土与池很好地粘合,与沼气池形成一个整体,提高沼气池的密封性。现将这种水泥的特性和施工方法介绍如下:明矾石膨胀水泥,是以硅酸盐水泥熟料、天然明矾石、石膏和粒化高炉矿渣(或粉煤灰),按一定的比例磨制成的,具有膨胀性能的水硬性胶凝材料构成。这种材料的结晶不断的增长,填充在砂浆和混凝
In the construction and use of biogas digesters, due to careless construction and use, cracks or partial damages to biogas digesters are often caused, resulting in the inability to use biogas digesters. Repairing with ordinary cement will cause the newly poured cement mortar concrete not to adhere well and not achieve the purpose of sealing. The use of alumite expansion cement to repair the cracks or local damages of the digester can make the cement mortar or concrete added to the tank well adhere to the pool, form a whole with the digester, and improve the tightness of the digester. The characteristics and construction method of this cement are now described as follows: The alum stone expansion cement is a Portland cement clinker, natural alum, gypsum and granulated blast furnace slag (or fly ash), and is milled at a certain proportion. Made of hydraulic cementitious material with swelling properties. The crystallization of this material continues to grow, filling in mortar and coagulation