生石灰,学名氧化钙,是用石灰岩等天然原材料,经过1000～1100℃的高温煅烧而得的块状产品,工业与民用建筑中应用广泛。春天是建房的黄金时节,现将石灰的一些基本常识介绍如下。1.石灰的质量鉴定石灰在煅烧过程中,由于所受的温度不同,一般分为正品石灰、欠火石灰及过火石灰三种。煅烧良好的石灰块,质轻色匀,遇水后能迅速熟化;而欠火石灰容重较大,其中心部分仍是岩石硬块,不能熟 Quicklime, a scientific name of calcium oxide, is a massive product obtained by calcining a natural material such as limestone at a high temperature of 1000 to 1100°C, and is widely used in industrial and civil buildings. Spring is the golden season of building a house. Now we will introduce some basic common sense of lime as follows. 1. Quality Identification of Lime In the process of calcining lime, due to different temperatures, it is generally divided into three types: genuine lime, underfire lime, and overfire lime. Well-calcined lime blocks are light and uniform in color, and can be quickly matured after encountering water; while limestones that are under fire have a large bulk density, the central part of which is still a rock hard block and cannot be cooked.