00000nam 2200000za 4500 9.867402 CaOODSP 20221107162315 m o d f cr ||||||||||| 190121s1979 onca ob f000 0 eng d 0660105306 (print) CaOODSP eng eng fre n-cn--- M38-13/79-31E-PDF M38-13/79-31 Malhotra, V. M. Superplasticizers [electronic resource] : their effect on fresh and hardened concrete / V.M. Malhotra. Ottawa : CANMET, Energy, Mines and Resources Canada, 1979. v, 23 p. : ill. CANMET report ; 79-31 Cover title. "Minerals Research Program, Mineral Sciences Laboratories." "June 1979." Digitized edition from print [produced by Natural Resources Canada]. Includes bibliographical references (p. 19-21). "Superplasticizers are a new family of admixtures which can either be used as high-range water reducers or be incorporated into concrete to produce "flowing" concrete. They were introduced into North America in 1976 and since then a number of research laboratories have been developing data on their effect on the properties of fresh and hardened concrete. This paper reviews these developments. The properties of fresh concrete reviewed include bleeding and segregation, increases in slump and its subsequent loss with time, initial setting time, entrained air content, effect of repeated dosages, vibration requirements, and pumpability of superplasticized concrete. The properties of hardened concrete reviewed include accelerated strength, mechanical and elastic properties, freeze-thaw durability, resistance to salt scaling and sulphate attack"--Synopsis, p. i. Includes synopsis in French. Concrete--Additives Plasticizers Canada. Energy, Mines and Resources Canada. Canada Centre for Mineral and Energy Technology. Minerals Research Program (Canada) Mineral Sciences Laboratories (Canada) CANMET report ; 79-31. (CaOODSP)9.852792 PDF 2.29 MB https://publications.gc.ca/collections/collection_2019/rncan-nrcan/m38-13/M38-13-79-31-eng.pdf 307186