TY - JOUR
T1 - On the use of limestone calcined clay cement (LC3) in high-strength strain-hardening cement-based composites (HS-SHCC)
AU - Wang, Lei
AU - Ur Rehman, Nazaib
AU - Curosu, Iurie
AU - Zhu, Zhou
AU - Beigh, Mirza Abdul Basit
AU - Liebscher, Marco
AU - Chen, Liang
AU - Tsang, Daniel C.W.
AU - Hempel, Simone
AU - Mechtcherine, Viktor
N1 - Funding Information:
The authors express their gratitude to the German Research Foundation ( Deutsche Forschungsgemeinschaft – DFG) for the financial support provided within the framework of the Research Training Group GRK 2250, project number 287321140 . Furthermore, the support by the Alexander von Humboldt Foundation (AvH) is also greatly acknowledged by the first author.
Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2021/6
Y1 - 2021/6
N2 - High-strength strain-hardening cement-based composites (HS-SHCC) demonstrate excellent mechanical and durability properties. However, high cement content typical to HS-SHCC results not only in high carbon footprint, but also in excessive hydration heat and severe autogenous shrinkage. In this investigation, Limestone Calcined Clay Cement (LC3) was used to produce sustainable HS-SHCC. The LC3 substitution resulted in higher energy consumption during mixing and in shorter setting times of the fresh, plain matrices. Although the LC3 substitution slightly reduced the compressive strength, the formation of highly polymerized C-A-S-H gel and abundant ettringite benefited the flexural strength of the plain matrices. Additionally, single-fiber pullout experiments showed that the use of LC3 led to increased fiber-matrix bond strength and pullout energy. Finally, the replacement of Portland cement by LC3 resulted in HS-SHCC with similar mechanical performance to the reference composite, indicating a high potential for using LC3 in high-performance cement-based composites.
AB - High-strength strain-hardening cement-based composites (HS-SHCC) demonstrate excellent mechanical and durability properties. However, high cement content typical to HS-SHCC results not only in high carbon footprint, but also in excessive hydration heat and severe autogenous shrinkage. In this investigation, Limestone Calcined Clay Cement (LC3) was used to produce sustainable HS-SHCC. The LC3 substitution resulted in higher energy consumption during mixing and in shorter setting times of the fresh, plain matrices. Although the LC3 substitution slightly reduced the compressive strength, the formation of highly polymerized C-A-S-H gel and abundant ettringite benefited the flexural strength of the plain matrices. Additionally, single-fiber pullout experiments showed that the use of LC3 led to increased fiber-matrix bond strength and pullout energy. Finally, the replacement of Portland cement by LC3 resulted in HS-SHCC with similar mechanical performance to the reference composite, indicating a high potential for using LC3 in high-performance cement-based composites.
KW - Fiber-matrix bond
KW - Fresh-state properties
KW - High-performance fiber-reinforced composites
KW - Limestone calcined clay cement (LC)
KW - Microstructure
KW - Strain-hardening cement-based composites (SHCC)
UR - https://www.scopus.com/pages/publications/85102056148
U2 - 10.1016/j.cemconres.2021.106421
DO - 10.1016/j.cemconres.2021.106421
M3 - Journal article
AN - SCOPUS:85102056148
SN - 0008-8846
VL - 144
JO - Cement and Concrete Research
JF - Cement and Concrete Research
M1 - 106421
ER -
