Trade Journals for the Concrete Industry

Cement and mortar setting times are determined by means of a needle which performs a series of penetrations in a hydrated cement sample. As consistency increases, depth of penetration decreases, hence the diagram relevant to the latter describes the physical effect of setting process over a given time. Specific Standards prescribe the procedure to follow for the test as well as the form the instrument should take. The instrument is not only built in compliance with these Standards but also enables the test to be carried out automatically.