Adsorption of cations from a cement suspension onto lignocellulosic substrates and its influence on cement setting

authors	Pereira, C; Jorge, FC; Ferreira, JMF
nationality	International
journal	JOURNAL OF WOOD CHEMISTRY AND TECHNOLOGY
author keywords	cement; cations; lignocellulosics; interactions; adsorption; hindrance
keywords	HARDENING INHIBITORY COMPONENTS; PORTLAND-CEMENT; TROPICAL HARDWOODS; WOOD; COMPATIBILITY; MANUFACTURE; BOARDS; HEARTWOOD; HYDRATION; STRENGTH
abstract	The calcium (Ca), sodium (Na), and potassium (K) contents of blue gum, maritime pine, and cork increased after these lignocellulosics were stirred with the filtrate of a cement suspension or a solution of calcium hydroxide. The adsorbed cations could be released easily by treatment with an acidic solution. It is suggested that those raw materials, and lignocellulosics in general, act as cation exchange substrates when they are mixed with cement and water to make wood-cement composites. The implications that such phenomena may have on cement hardening reactions, and how they could hinder them are discussed. The possibility that the phenomenon is related to well-known compatibility problems that many woods present when manufacturing wood-cement composites is discussed.
publisher	TAYLOR & FRANCIS INC
issn	0277-3813
year published	2005
volume	25
issue	4
beginning page	231
ending page	244
digital object identifier (doi)	10.1080/02773810500366672
web of science category	Materials Science, Paper & Wood
subject category	Materials Science
unique article identifier	WOS:000234138900003