BS EN 934-6:2019 pdf free.Admixtures for concrete, mortar and grout.Sampling, assessment and verification of the constancy of performance.
BS EN 934-6 The sample shall be composed of sub-samples from 6 packages (bags) or if the total number of packages (bags) is less than 6, from all packages (bags). The sub-samples are to be taken from packages (bags) distributed at random throughout the consignment. One of the following procedures shall be applied: a} where the packages contain up to 500 g, take all the contents of each package; b) where the packages contain more than 500 g, use one of the following methods: 1) insert a sampling tube, which takes a core not less than 25 mm in diameter, into the packages so that it takes a core of the material from substantially the entire length of the package; 2] empty one of the packages to be sampled on to a clean dry surface and mix the material. Take at least three portions of not less than 125 g each from different parts of the heap. The method given in 1) is the preferred method, but if a sampling tube is not available, the method given in 2) shall be used. Repeat the procedure with each of the other packages to be sampled and thoroughly mix the subsamples obtained to form one bulk sample. If the bulk sample exceeds 3 kg, it shall be reduced to 3 kg, either by coning and quartering or by use of a sample splitter. Divide the sample into three equal parts and place each part in a clean, air tight, labelled container. At least one container holding 1 kg shall be kept for future reference. Store container(s) in a place that is protected from moisture, heat and light for one year or until the use-by date, whichever is the shorter period.The sample shall be composed of sub-samples taken from 6 containers or if the total number of containers is less than 6 from all containers. The sub-samples are to be taken from containers distributed at random throughout the consignment. Agitate the admixtures in the containers to disperse all lightly settled material. Disregard all deposits which are not readily brought into suspension by such agitation.BS EN 934-6 pdf download.