TY - GEN
T1 - SHRINKAGE OF ALKALI-ACTIVATED BLENDED BINDER MIXTURES
AU - Tekle, Biruk Hailu
AU - Hertwig, Ludwig
AU - Holschemacher, Klaus
N1 - Funding Information:
The authors gratefully acknowledge the financial support of the Alexander von Humboldt Foundation (1206836-AUS-HFST-P).
Funding Information:
financial support of the Alexander von Humboldt Foundation
Publisher Copyright:
© 2022 ISEC Press.
PY - 2022
Y1 - 2022
N2 - Alkali-activated cement (AAC) has excellent mechanical and durability properties. Most of all, AAC is environmentally friendly and utilizes less raw material than ordinary Portland cement (OPC). It has been 60 years since the initial appearance of AAC in the research world. Since then, the knowledge has matured from the various research conducted in the area. Studies have shown that the shrinkage of AAC is relatively large compared to OPC, making it susceptible to cracking. For AAC to be an ideal replacement for OPC, its shrinkage behavior and factors affecting it need to be investigated in detail. In this paper, the influence of the ratio of total water to total solid binders (TW/TS), sodium silicate to sodium hydroxide solids (SS/SH), and alkaline solids to binders (AS/B) on shrinkage are investigated. The results showed that TW/TS is the main factor affecting the shrinkage of AAC. An increase in TW/TS reduced the shrinkage significantly. AS/B also reduced the shrinkage but at a lower significance. SS/SH ratio showed no significant effect. Such understanding of the different factors affecting the shrinkage of AAC can help design a mixture with a better shrinkage behavior.
AB - Alkali-activated cement (AAC) has excellent mechanical and durability properties. Most of all, AAC is environmentally friendly and utilizes less raw material than ordinary Portland cement (OPC). It has been 60 years since the initial appearance of AAC in the research world. Since then, the knowledge has matured from the various research conducted in the area. Studies have shown that the shrinkage of AAC is relatively large compared to OPC, making it susceptible to cracking. For AAC to be an ideal replacement for OPC, its shrinkage behavior and factors affecting it need to be investigated in detail. In this paper, the influence of the ratio of total water to total solid binders (TW/TS), sodium silicate to sodium hydroxide solids (SS/SH), and alkaline solids to binders (AS/B) on shrinkage are investigated. The results showed that TW/TS is the main factor affecting the shrinkage of AAC. An increase in TW/TS reduced the shrinkage significantly. AS/B also reduced the shrinkage but at a lower significance. SS/SH ratio showed no significant effect. Such understanding of the different factors affecting the shrinkage of AAC can help design a mixture with a better shrinkage behavior.
KW - Alkaline solid
KW - Ambient curing
KW - Autogenous shrinkage
KW - Blast furnace slag
KW - Fly ash
UR - http://www.scopus.com/inward/record.url?scp=85136082494&partnerID=8YFLogxK
UR - https://www.isec-society.org/ISEC_PRESS/EURO_MED_SEC_04/html/toc.php
U2 - 10.14455/ISEC.2022.9(1).AAC-05
DO - 10.14455/ISEC.2022.9(1).AAC-05
M3 - Conference contribution
AN - SCOPUS:85136082494
VL - 9
T3 - Proceedings of International Structural Engineering and Construction
SP - 1
EP - 7
BT - Proceedings of International Structural Engineering and Construction
A2 - Singh, Amarjit
A2 - Yazdani, Siamak
A2 - Dinevski, Dejan
A2 - Gurgun, Asli Pelin
A2 - Holschemacher, Klaus
A2 - Quapp, Ulrike
PB - ISEC Press
CY - United States
T2 - 4th European and Mediterranean Structural Engineering and Construction Conference, EURO-MED-SEC-4 2022
Y2 - 20 June 2022 through 25 June 2022
ER -