Abstract
The mix design of ultra-high performance concrete (UHPC) is complicated by the presence of many "ingredients." The fundamental packing density allows a simpler mix design with fewer ingredients to achieve optimum packing density and dense microstructure. The optimum particle grading increases the flowability of UHPC and eliminates entrapped air. This study presents a simplified particle grading design approach that positively influences the strength, autogenous shrinkage, and microstructure characteristics of UHPC. Carbon nanofibers (CNFs) of superior mechanical properties were added to enhance the strength of UHPC and to reduce its autogenous shrinkage. In addition, ground granulated blast-furnace slag (GGBS) was used as a cement replacement material to reduce the amount of cement in UHPC mixes. Test results showed that the presence of homogeneously dispersed CNF increased the compressive strength and compensated the autogenous shrinkage of UHPC. The findings indicated that an ideal particle distribution, which is close to the modified Andreasen and Andersen grading model, contributed to achieving high compressive strength and CNFs were capable of providing nano-bridges to compensate the shrinkage caused by GGBS.
| Original language | English |
|---|---|
| Article number | 320 |
| Journal | Materials |
| Volume | 12 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 21 Jan 2019 |
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Keywords
- Autogenous shrinkage
- Carbon nanofibers (CNFs)
- Compressive strength
- Entrapped air
- Flowability
- Microstructure
- Nanostructure
- Particle grading
- Ultra-high performance concrete (UHPC)
ASJC Scopus subject areas
- Materials Science(all)
Cite this
Autogenous shrinkage, microstructure, and strength of ultra-high performance concrete incorporating carbon nanofibers. / Lim, Jacob L.G.; Raman, Sudharshan Naidu; Safiuddin, Md; Mohd. Zain, Muhammad Fauzi; Hamid, Roszilah.
In: Materials, Vol. 12, No. 2, 320, 21.01.2019.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Autogenous shrinkage, microstructure, and strength of ultra-high performance concrete incorporating carbon nanofibers
AU - Lim, Jacob L.G.
AU - Raman, Sudharshan Naidu
AU - Safiuddin, Md
AU - Mohd. Zain, Muhammad Fauzi
AU - Hamid, Roszilah
PY - 2019/1/21
Y1 - 2019/1/21
N2 - The mix design of ultra-high performance concrete (UHPC) is complicated by the presence of many "ingredients." The fundamental packing density allows a simpler mix design with fewer ingredients to achieve optimum packing density and dense microstructure. The optimum particle grading increases the flowability of UHPC and eliminates entrapped air. This study presents a simplified particle grading design approach that positively influences the strength, autogenous shrinkage, and microstructure characteristics of UHPC. Carbon nanofibers (CNFs) of superior mechanical properties were added to enhance the strength of UHPC and to reduce its autogenous shrinkage. In addition, ground granulated blast-furnace slag (GGBS) was used as a cement replacement material to reduce the amount of cement in UHPC mixes. Test results showed that the presence of homogeneously dispersed CNF increased the compressive strength and compensated the autogenous shrinkage of UHPC. The findings indicated that an ideal particle distribution, which is close to the modified Andreasen and Andersen grading model, contributed to achieving high compressive strength and CNFs were capable of providing nano-bridges to compensate the shrinkage caused by GGBS.
AB - The mix design of ultra-high performance concrete (UHPC) is complicated by the presence of many "ingredients." The fundamental packing density allows a simpler mix design with fewer ingredients to achieve optimum packing density and dense microstructure. The optimum particle grading increases the flowability of UHPC and eliminates entrapped air. This study presents a simplified particle grading design approach that positively influences the strength, autogenous shrinkage, and microstructure characteristics of UHPC. Carbon nanofibers (CNFs) of superior mechanical properties were added to enhance the strength of UHPC and to reduce its autogenous shrinkage. In addition, ground granulated blast-furnace slag (GGBS) was used as a cement replacement material to reduce the amount of cement in UHPC mixes. Test results showed that the presence of homogeneously dispersed CNF increased the compressive strength and compensated the autogenous shrinkage of UHPC. The findings indicated that an ideal particle distribution, which is close to the modified Andreasen and Andersen grading model, contributed to achieving high compressive strength and CNFs were capable of providing nano-bridges to compensate the shrinkage caused by GGBS.
KW - Autogenous shrinkage
KW - Carbon nanofibers (CNFs)
KW - Compressive strength
KW - Entrapped air
KW - Flowability
KW - Microstructure
KW - Nanostructure
KW - Particle grading
KW - Ultra-high performance concrete (UHPC)
UR - http://www.scopus.com/inward/record.url?scp=85060294086&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85060294086&partnerID=8YFLogxK
U2 - 10.3390/ma12020320
DO - 10.3390/ma12020320
M3 - Article
AN - SCOPUS:85060294086
VL - 12
JO - Materials
JF - Materials
SN - 1996-1944
IS - 2
M1 - 320
ER -