Abstract
This paper presents fracture responses of alkali-activated slag (AAS) mortars with up to 30% (by volume) of slag being replaced by waste iron powder that contains a significant fraction of elongated iron particles. The elongated particles act as microreinforcement and improve the crack resistance of AAS mortars by enlarging the fracture process zone (FPZ). An enlarged FPZ signifies increased energy dissipation, which is reflected in a significant increase in crack growth resistance as determined from R-curves. Fracture responses of notched AAS mortar beams under three-point bending are simulated using the extended finite-element method (XFEM) to develop a tool for direct determination of fracture characteristics such as crack extension and fracture toughness in particulate-reinforced AAS mortars. Fracture response simulated using the XFEM framework correlates well with experimental observations. The comprehensive fracture studies reported here provide an economical and sustainable means of improving the ductility of AAS systems, which are generally more brittle than their conventional portland cement counterparts.
| Original language | English (US) |
|---|---|
| Article number | 04019043 |
| Journal | Journal of Materials in Civil Engineering |
| Volume | 31 |
| Issue number | 5 |
| DOIs | |
| State | Published - May 1 2019 |
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Keywords
- Alkali-activated slag
- Digital image correlation
- Extended finite-element method
- Fracture response
- Particulate reinforcement
ASJC Scopus subject areas
- Civil and Structural Engineering
- Building and Construction
- Materials Science(all)
- Mechanics of Materials
Cite this
Experimental and Numerical Investigation of Fracture Behavior of Particle-Reinforced Alkali-Activated Slag Mortars. / Nayak, Sumeru; Kizilkanat, Ahmet; Neithalath, Narayanan; Das, Sumanta.
In: Journal of Materials in Civil Engineering, Vol. 31, No. 5, 04019043, 01.05.2019.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Experimental and Numerical Investigation of Fracture Behavior of Particle-Reinforced Alkali-Activated Slag Mortars
AU - Nayak, Sumeru
AU - Kizilkanat, Ahmet
AU - Neithalath, Narayanan
AU - Das, Sumanta
PY - 2019/5/1
Y1 - 2019/5/1
N2 - This paper presents fracture responses of alkali-activated slag (AAS) mortars with up to 30% (by volume) of slag being replaced by waste iron powder that contains a significant fraction of elongated iron particles. The elongated particles act as microreinforcement and improve the crack resistance of AAS mortars by enlarging the fracture process zone (FPZ). An enlarged FPZ signifies increased energy dissipation, which is reflected in a significant increase in crack growth resistance as determined from R-curves. Fracture responses of notched AAS mortar beams under three-point bending are simulated using the extended finite-element method (XFEM) to develop a tool for direct determination of fracture characteristics such as crack extension and fracture toughness in particulate-reinforced AAS mortars. Fracture response simulated using the XFEM framework correlates well with experimental observations. The comprehensive fracture studies reported here provide an economical and sustainable means of improving the ductility of AAS systems, which are generally more brittle than their conventional portland cement counterparts.
AB - This paper presents fracture responses of alkali-activated slag (AAS) mortars with up to 30% (by volume) of slag being replaced by waste iron powder that contains a significant fraction of elongated iron particles. The elongated particles act as microreinforcement and improve the crack resistance of AAS mortars by enlarging the fracture process zone (FPZ). An enlarged FPZ signifies increased energy dissipation, which is reflected in a significant increase in crack growth resistance as determined from R-curves. Fracture responses of notched AAS mortar beams under three-point bending are simulated using the extended finite-element method (XFEM) to develop a tool for direct determination of fracture characteristics such as crack extension and fracture toughness in particulate-reinforced AAS mortars. Fracture response simulated using the XFEM framework correlates well with experimental observations. The comprehensive fracture studies reported here provide an economical and sustainable means of improving the ductility of AAS systems, which are generally more brittle than their conventional portland cement counterparts.
KW - Alkali-activated slag
KW - Digital image correlation
KW - Extended finite-element method
KW - Fracture response
KW - Particulate reinforcement
UR - http://www.scopus.com/inward/record.url?scp=85059571303&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85059571303&partnerID=8YFLogxK
U2 - 10.1061/(ASCE)MT.1943-5533.0002673
DO - 10.1061/(ASCE)MT.1943-5533.0002673
M3 - Article
VL - 31
JO - Journal of Materials in Civil Engineering
JF - Journal of Materials in Civil Engineering
SN - 0899-1561
IS - 5
M1 - 04019043
ER -