The purpose of this standard is to define and establish the characteristics that must be met by natural or artificial control materials that will be used in the manufacture of concrete, mortars and pastes without and with additives (control and control concretes, mortars and pastes). reference, respectively) to carry out the physical and mechanical tests indicated in the standards corresponding to each of the families of additives defined in the UNE 83-200 standard. Likewise, this standard defines and establishes the characteristics of the pastes, mortars and witness concretes - made with the mentioned witness materials, without using additives - and of reference - manufactured with said witness materials and with additives -. NOTE- Regardless of these control materials, those specific to each work (cement, aggregates and water) must be used to carry out the tests specified in the standards of each family of additives and, if possible, the same conditions of the work, in order to know the effects of the additive - or the various additives - that is intended to be studied.