Details
| Originalsprache | Englisch |
|---|---|
| Seiten (von - bis) | 111-124 |
| Seitenumfang | 14 |
| Fachzeitschrift | European journal of mineralogy |
| Jahrgang | 23 |
| Ausgabenummer | 1 |
| Frühes Online-Datum | Nov. 2010 |
| Publikationsstatus | Veröffentlicht - 2011 |
Abstract
Silicate, aluminosilicate and calciumsilicate concretes, cements, and mortars were synthesized based on rice husk-bark ash, fly ash, slag and metakaolin. Alkali activation was done using sodium and potassium waterglass solutions. The hardening of the concretes and mortars was investigated in dependence on time by compressive strength measurements. The ageing of cement pastes was followed by infrared absorption spectroscopy. The infrared absorption peaks were evaluated in comparison to spectra obtained for silicate and aluminosilicate glasses and condensates from waterglass solutions. The increase in compressive strength of the materials at the beginning of ageing can be explained by the development of two main structural units on different time scales: a fast formation of silicate chain type units of considerable length and a slow formation of a silicate - and in presence of Al - aluminosilicate three-dimensional network enclosing the chains. The protection of the chains against destruction becomes crucial for long term high strength. Alkali activation of slag containing significant amounts of CaO leads to the formation of calcium silicate hydrate type phases and strongly enhanced mechanical strength.
ASJC Scopus Sachgebiete
- Erdkunde und Planetologie (insg.)
- Geochemie und Petrologie
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in: European journal of mineralogy, Jahrgang 23, Nr. 1, 2011, S. 111-124.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Silicate-, aluminosilicate and calciumsilicate gels for building materials
T2 - Chemical and mechanical properties during ageing
AU - Rüscher, Claus H.
AU - Mielcarek, Elzbieta M.
AU - Wongpa, Jakrapan
AU - Jaturapitakkul, Chai
AU - Jirasit, Fongjan
AU - Lohaus, Ludger
N1 - Funding Information: The authors thank J.L. Provis (University of Melbourne, Australia), and an unknown referee for critical reading of the manuscript and giving valuable comments, M. Wildner (University of Wien, Austria) and S. Conticelli (University of Firenze, Italy) for handling. EM thanks for the financial support within ‘‘Lichtenbergstipendium’’ of the ‘‘Land Niedersachsen’’. JW acknowledges support from Thailand research fund (TRF) under the Royal Golden Jubilee Ph.D Program and for the one year stay abroad at Department of Mineralogy of Leibniz University of Hannover, Germany. FJ thanks the DAAD for supporting part of her stay in Hannover.
PY - 2011
Y1 - 2011
N2 - Silicate, aluminosilicate and calciumsilicate concretes, cements, and mortars were synthesized based on rice husk-bark ash, fly ash, slag and metakaolin. Alkali activation was done using sodium and potassium waterglass solutions. The hardening of the concretes and mortars was investigated in dependence on time by compressive strength measurements. The ageing of cement pastes was followed by infrared absorption spectroscopy. The infrared absorption peaks were evaluated in comparison to spectra obtained for silicate and aluminosilicate glasses and condensates from waterglass solutions. The increase in compressive strength of the materials at the beginning of ageing can be explained by the development of two main structural units on different time scales: a fast formation of silicate chain type units of considerable length and a slow formation of a silicate - and in presence of Al - aluminosilicate three-dimensional network enclosing the chains. The protection of the chains against destruction becomes crucial for long term high strength. Alkali activation of slag containing significant amounts of CaO leads to the formation of calcium silicate hydrate type phases and strongly enhanced mechanical strength.
AB - Silicate, aluminosilicate and calciumsilicate concretes, cements, and mortars were synthesized based on rice husk-bark ash, fly ash, slag and metakaolin. Alkali activation was done using sodium and potassium waterglass solutions. The hardening of the concretes and mortars was investigated in dependence on time by compressive strength measurements. The ageing of cement pastes was followed by infrared absorption spectroscopy. The infrared absorption peaks were evaluated in comparison to spectra obtained for silicate and aluminosilicate glasses and condensates from waterglass solutions. The increase in compressive strength of the materials at the beginning of ageing can be explained by the development of two main structural units on different time scales: a fast formation of silicate chain type units of considerable length and a slow formation of a silicate - and in presence of Al - aluminosilicate three-dimensional network enclosing the chains. The protection of the chains against destruction becomes crucial for long term high strength. Alkali activation of slag containing significant amounts of CaO leads to the formation of calcium silicate hydrate type phases and strongly enhanced mechanical strength.
KW - Aluminosilicate gels
KW - Geopolymerisation
KW - Mechanical properties
KW - Spectroscopic analysis
UR - http://www.scopus.com/inward/record.url?scp=79954529036&partnerID=8YFLogxK
U2 - 10.1127/0935-1221/2010/0022-2070
DO - 10.1127/0935-1221/2010/0022-2070
M3 - Article
AN - SCOPUS:79954529036
VL - 23
SP - 111
EP - 124
JO - European journal of mineralogy
JF - European journal of mineralogy
SN - 0935-1221
IS - 1
ER -