BS 890:1995 pdf download.Building limes.
1 Scope This British Standard specifies requirements for building limes used as binders, predominantly in mortar for masonry as well as for rendering and plastering, and for limes used for soil stabilization. It gives a general definition of the different types of building limes and their classification. It also specifies requirements for their chemical, mechanical and physical properties, which depend on the type of building lime, and provides guidance on the manufacturer’s autocontrol procedures to ensure conformity. Hydraulic limes are not covered by this standard.
2 References
2.1 Normative references This British Standard incorporates, by dated or undated reference, provisions from other publications. These normative references are made at the appropriate places in the text and the cited publications are listed on the inside back cover. For dated references, only the edition cited applies: any subsequent amendments to or revisions of the cited publication apply to this British Standard only when incorporated in the reference by amendment or revision. For undated references, the latest edition of the cited publication applies, together with any amendments.
5 Chemical properties When tested in accordance with BS EN 459-2, the chemical properties of building limes shall conform to the values given in Table 1. All types of lime listed in Table 1 are permitted to contain admixtures in small quantities. If the admixture content exceeds 0.1 %, the actual amount and types shall be declared. Admixtures shall have no detrimental effect on the properties of mortars.
6 Physical properties When tested in accordance with BS EN 459-2, the physical properties of quicklimes and of hydrated limes shall conform to the values given in Table 2 and Table 3, respectively. NOTE Conformity to the requirement for soundness may be ensured by the manufacturer through the operation of a statistical quality control scheme based on the conformity criteria described in Annex A.
7 Marking Building lime conforming to this standard shall be marked, on the bag if so supplied, the delivery note 2) , the invoice 2) or any other accompanying documentation, with the following information: a) type of building lime; b) commercial form of the type of building lime (i.e. quicklime, hydrated lime or lime putty); c) manufacturer’s name; d) place of production; e) working instructions if necessary; f) safety information according to regulations; g) type and amount of admixture if present in excess of 0.1 %; h) number and year of this British Standard, i.e. BS 890:1995 3) .BS 890 pdf download.