lime mortar

基本解释

After a century, it's still standing, but its bricks have begun to drop and break as, little by little, its lime mortar, exposed to temperature swings, crumbles and powders.
一个世纪之后，它还依旧耸立，但砖块早就开始剥落，一点一点地裂开；石灰砂浆也是如此，温差变化使其碎裂为粉末。
blog.sina.com.cn
The experimental results showed that:the main component of masonry mortars is calcium carbonate, the content between 75% ~90%, and they should be made from relatively pure lime mortar.
结果表明：这些古城墙使用的胶结材料是纯＂白灰灰浆＂，主要成分是碳酸钙，含量在75%~90%之间，其原料主要是钙质生石灰，个别来自镁质生石灰；
Before the 19th-century invention of portland cement, masons used thin joints of lime mortar, which required greater precision than the thicker joints of portland-cement mortar and were not as strong.
在19世纪普通水泥发明之前，泥瓦匠使用石灰砂浆薄黏片，这种黏片比普通水泥砂浆的厚片更要求精确，但不是很坚固。