Лако-красочные материалы — производство

The manufacturer should provide a dated, coded and titled instruction sheet with each delivery of adhesive. It should refer to this Specification and indicate conformance with it. It should also state (1) the general chemical type of each component used in the adhesives (2) recommended storage conditions and shelf life when stored under these conditions […]

The adhesive should be packed in containers of suitable sizes so that weighing or measurement is not required. That is, the correct proportions should be obtained by mixing the entire contents of components A and В (and C). Compliance spectrum Each container should be durably and legibly marked with (1) manufacturer’s name and address (2) […]

The manufacturer should keep on file the normal quality control test data for each batch of adhesive, and should provide a copy of the test reports for each batch on request. He should also certify conformance with this Specification. Average results should meet the Specification requirements and no single result may be more than 15% […]

The surface preparation of steel adherends for joint testing should be as follows. (1) If necessary, remove heavy layers of rust by hand, or by mechanical abrasion with emery cloth, or by wire brushing, to give rust grades A or В as defined by Swedish Standard SIS 055900 (6). (2) Either wash with detergent solution, […]

Moisture resistance. The adhesive should be formulated to minimise moisture transport through the adhesive itself. The equilibrium water content (M„) should not exceed 3% by weight after immersion in distilled water at 20 °С. The permeability, obtained from the product of the coefficient of diffusion (D) and Mshould not exceed 5 x 10-14 m2/s at […]

A cure and storage temperature of 20 °С should be used for all tests described in this clause. Results should be based on the meanof a minimum of five tests in each case. Notwithstanding the effects of test rate and temperature, it should be recognized that the mechanical properties of the adhesive may undergo significant […]

Application. The adhesive should be capable of being applied readily to both concrete and treated steel surfaces in layers from 1 to 10 mm thick, to allow for concrete surface irregularities. Proprietory dispensing equipment is available to facilitate correct metering and mixing of the adhesive. Usable life. The usable life of the mixed adhesive before […]

The adhesive should be a two-part epoxy comprising resin and hardener components. The resin will normally be based on the diglycidyl ether of ‘bisphenol A’ or ‘bisphenol F’ or a blend of the two. The hardener, or curing agent, will normally be from the polyamine group, since these tend to result in adhesives with better […]

The purpose of the above is to specify requirements for a cold-cure adhesive to permit either the repair or strengthening of existing concrete structures by bonding on additional external steel plate reinforcement, or the construction of steel/concrete composite units in which wet concrete is poured on to steel freshly coated with a layer of adhesive. […]

The sample specification, or ‘compliance spectrum’ which follows was introduced by the authors in 1988 and published in the Proceedings of the Institution of Civil Engineers(l). It addresses the requirements of adhesives, bonding procedures and test methods for structural steel-to-concrete bonding. The test methods rec­ommended were based on the experience gained from extensive programmes of […]