Reaction mechanisms of wood ash for use as a partial cement replacement

被引：18
|
作者：
Sigvardsen, Nina M. [1 ]
Geiker, Mette R. [2 ]
Ottosen, Lisbeth M. [1 ]
机构：
[1] Tech Univ Denmark, Dept Civil Engn, Lyngby, Denmark
[2] Norwegian Univ Sci & Technol, Dept Struct Engn, Trondheim, Norway
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2021年 / 286卷
关键词：
Wood ash; Hydraulic activity; Pozzolanic properties; Compressive strength; Phase development; FLUIDIZED-BED COMBUSTION; FLY-ASH; BIOMASS ASHES; WASTE; PEAT;
D O I：
10.1016/j.conbuildmat.2021.122889
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
An increase in the produced amounts of wood ashes (WAs) is seen worldwide. In this study, the potential use of two representative WAs as a partial cement replacement is investigated. The WAs originate from combustion of wood chips by grate combustion (WA1) and circulating fluidised bed combustion (WA2). Both WAs were found to possess hydraulic properties, no pozzolanic properties were detected. A substan-tial difference in strength development was observed between WA1 and WA2 attributed to the phases formed; WA2 contributing the most, ettringite in addition to other phases were formed, while gypsum formed in WA1 pastes. (c) 2021 Elsevier Ltd. All rights reserved.
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页数：11
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