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石灰是在土木建筑中应用得最古老的一项建筑材料,几千年前我国劳动人民修筑万里长城时便已懂得使用石灰。现代一切建筑工程中仍然离不开这项材料。农村建筑中它被应用得也非常广泛。但若摸不清它的特性,在不应、不能使用石灰的场合去使用石灰,势必造成不应有的损失。一、石灰忌水石灰属气硬性材料,只有在大气中二氧化碳的作用下,熟石灭(氢氧化钙)才能变成碳酸钙,具有比较坚硬的结晶。在水中它永远不能凝硬;凝硬后长时间被水浸沤或保持潮湿状态,也会逐渐粉化解体,丧失强度。所以在一切遇水近潮见湿的场合或部位,都
Lime is one of the oldest building materials used in civil engineering. The working people of our country knew how to use lime when they built the Great Wall thousands of years ago. It is still inseparable from modern construction projects. It is also widely used in rural architecture. However, if one does not understand its characteristics, lime should be used in places where lime should not be used. It is bound to cause undue losses. First, lime avoid water Lime is a gas hard material, only the role of carbon dioxide in the atmosphere, cooked stone off (calcium hydroxide) can become calcium carbonate, with a relatively hard crystallization. In the water, it can never be hardened; after being hardened for a long time, it can be immersed in water or kept in a wet state, and it can gradually disintegrate and lose its strength. Therefore, in all occasions or locations where water is near wet and wet,