论文部分内容阅读
当工地上发现水泥过期或有疑问需要取样做标号鉴定时,有些同志往往从原有的破袋和撒落在地上的水泥中取样。这种取样方法,不能反映整袋水泥的实际标号,鉴定结果,必然低于整袋水泥的标号,因而在使用上会造成浪费。如何使水泥取样有代表性呢?国家标准规定可连续取样(这是指水泥厂机械法连续取样), 也可从20个以上不同部位取等量样品,总数至少10公斤。这就是说,取水泥样时,如果是散装的,要在20个以上不同的部位取,而整袋的要在20袋以上的袋里取,各取半公斤,才能满足10公斤的要求。散装的样好取,袋装水泥怎么办呢?要打开20袋水泥取样,实际上是很难以做到的。现在介绍一种简便的工具——水泥取样器。这种取样器可用工
When cement on site was found to be out of date or there were doubts about the need to sample samples for identification, some comrades often sampled from the original broken bags and cement that had landed on the ground. This sampling method cannot reflect the actual label of the whole bag of cement, and the identification result must be lower than the label of the entire bag of cement, thus causing waste in use. How to make the cement sample representative? National standards stipulate that continuous sampling (this refers to the continuous sampling of the cement plant mechanical method), can also take equal amounts of samples from more than 20 different parts, a total of at least 10 kg. This means that when taking cement samples, if they are in bulk, they must be taken in more than 20 different locations, and the entire bag must be taken in 20 bags or more, each taking half a kilogram, to meet the requirements of 10 kilograms. How to do the bulk sample, bagged cement? To open 20 bags of cement sampling is actually very difficult to do. A simple tool, the cement sampler, is now introduced. This sampler is available