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混凝土在酸作用下的稳定性不仅取决于粘结剂的耐酸性,而且还取决于骨料的耐酸性。制作以水溶性硅酸盐为基体的耐酸混凝土通常采用酸溶率不超过3—8%的岩石,这种高强度的岩石有安山岩、玄武岩、花岗岩和辉绿岩等。制作上述混凝土工艺特点是须采用三种不同的耐酸骨料:比表面积不小于2000厘米~2/克的磨细填充料、细骨料(砂)和粗骨料。破碎和细磨坚固的耐酸岩石得到的上述骨料造成混凝土本身价格上涨,1立方米耐酸混凝土骨料总造价比普通混凝土平均高出10—15卢布。
The stability of concrete under the influence of acid depends not only on the acid resistance of the binder but also on the acid resistance of the aggregate. Acid-resistant concrete with water-soluble silicates as the matrix is usually made of rocks with an acid-dissolving ratio of no more than 3-8%. Such high-strength rocks include andesite, basalt, granite, and diabase. The characteristics of the above-mentioned concrete process must be three different acid-resistant aggregates: ground filler, fine aggregate (sand) and coarse aggregate with a specific surface area of not less than 2000 cm to 2 g. The above-mentioned aggregates obtained by crushing and finely grinding strong acid-resistant rocks caused the price of the concrete itself to rise. The total cost of 1 cubic meter of acid-resistant concrete aggregates is 10-15 roubles higher than ordinary concrete.