CO2 uptake of carbonation-cured cement blended with ground volcanic ash

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Accelerated carbonation curing (ACC) as well as partial replacement of cement with natural minerals are examples of many previous approaches, which aimed to produce cementitious products with better properties and environmental amicabilities. In this regard, the present study investigates CO2 uptake of carbonation-cured cement blended with ground Saudi Arabian volcanic ash (VA). Paste samples with cement replacement of 20%, 30%, 40%, and 50% by mass were prepared and carbonation-cured after initial curing of 24 h. A compressive strength test, X-ray diffractometry (XRD), and thermogravimetry were performed. Although pozzolanic reaction of VA hardly occurred, unlike other pozzolana in blended cement, the results revealed that incorporation of VA as a supplementary cementitious material significantly enhanced the compressive strength and diffusion of CO2 in the matrix. This increased the CO2 uptake capacity of cement, reducing the net CO2 emission upon carbonation curing. © 2018 by the authors.
Publisher
MDPI
Issue Date
2018-11
Language
English
Article Type
Article
Citation

MATERIALS, v.11, no.11, pp.2187 - 2187

ISSN
1996-1944
DOI
10.3390/ma11112187
URI
http://hdl.handle.net/10203/248738
Appears in Collection
CE-Journal Papers(저널논문)
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