Abstract: Automatic sprinkler systems have played a key role in fire protection engineering for over a century. Based on a review of statistical data, this Digest shows the reliability of such systems in place to be in excess of 96%. Means are suggested to improve this reliability to 99% through proper design, inspection and maintenance of systems.
Abstract: The sound transmission losses of single and double layer walls and floors are determined by the physical properties of the component materials and the methods of assembly. These factors are discussed.
Abstract: Polymer modified concrete may be divided into two classes: polymer impregnated concrete and polymer cement concrete. The first is produced by impregnation of precast hardened Portland cement concrete with a monomer that is subsequently converted to solid polymer. To produce the second, part of the cement binder of the concrete mix is replaced by polymer (often in latex form). Both have higher strength, lower water permeability, better resistance to chemicals, and greater freeze-thaw stability than conventional concrete.
Abstract: Polymer concrete (PC), or resin concrete, consists of a polymer binder, which may be a thermoplastic but more frequently is a thermosetting polymer, and a mineral filler such as aggregate, gravel and crushed stone. PC has higher strength, greater resistance to chemicals and corrosive agents, lower water absorption and higher freeze-thaw stability than conventional Portland cement concrete.
Subject: Concrete; polymer concrete; resin concrete; chemical attack; corrosivity; water absorption; freeze thaw cycles : Polymer concrete
Canadian Building Digest; no. CBD-242, ISSN: 0008-3097, Publication date: 1985-11-01