Abstract
Synopsis: Flexural strengthening of reinforced concrete (RC) beams with fiber reinforced polymer (FRP) composites and two different bonding agents were investigated in this research. The bonding agents used in this research consisted of an epoxy paste and a sprayed polyurea. When polyurea was used as the bonding agent, it was sprayed to specific regions on the RC beams. Three RC beams were .flexural strengthened with FRP composites according to the following techniques: (a) sprayed polyurea with and without glass FRP (GFRP) grid reinforcement, and (b) manual layup using one GFRP grid. Experimental results clearly indicate that flexural strengthening with the un-reinforced or reinforced polyurea technique is an effective strengthening scheme. Advantages of using polyurea over other epoxy based methods are that the application process requires significantly less time and the polyurea cures within minutes. Furthermore, no debonding of the un-reinforced or reinforced polyurea system was observed, suggesting a further benefit of this technique. Application of the polyurea system and key experimental results are presented and discussed herein.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 845-856 |
| Number of pages | 12 |
| Journal | American Concrete Institute, ACI Special Publication |
| Volume | 2017-October |
| Issue number | SP 327 |
| State | Published - Jan 1 2017 |
| Event | 13th International Symposium on Fiber-Reinforced Polymer Reinforcement for Concrete Structures 2017, FRPRCS 2017 - Anaheim, United States Duration: Oct 15 2017 → Oct 19 2017 |
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Keywords
- GFRP
- Grids
- Polyurea
- Reinforced concrete
- Retrofit
- Strengthening
ASJC Scopus subject areas
- Civil and Structural Engineering
- Building and Construction
- Materials Science(all)
Cite this
Flexural strengthening of RC beams with GFRP grid reinforced polymer. / Yu, Piyong; Silva, Pedro F.; Nanni, Antonio.
In: American Concrete Institute, ACI Special Publication, Vol. 2017-October, No. SP 327, 01.01.2017, p. 845-856.Research output: Contribution to journal › Conference article
}
TY - JOUR
T1 - Flexural strengthening of RC beams with GFRP grid reinforced polymer
AU - Yu, Piyong
AU - Silva, Pedro F.
AU - Nanni, Antonio
PY - 2017/1/1
Y1 - 2017/1/1
N2 - Synopsis: Flexural strengthening of reinforced concrete (RC) beams with fiber reinforced polymer (FRP) composites and two different bonding agents were investigated in this research. The bonding agents used in this research consisted of an epoxy paste and a sprayed polyurea. When polyurea was used as the bonding agent, it was sprayed to specific regions on the RC beams. Three RC beams were .flexural strengthened with FRP composites according to the following techniques: (a) sprayed polyurea with and without glass FRP (GFRP) grid reinforcement, and (b) manual layup using one GFRP grid. Experimental results clearly indicate that flexural strengthening with the un-reinforced or reinforced polyurea technique is an effective strengthening scheme. Advantages of using polyurea over other epoxy based methods are that the application process requires significantly less time and the polyurea cures within minutes. Furthermore, no debonding of the un-reinforced or reinforced polyurea system was observed, suggesting a further benefit of this technique. Application of the polyurea system and key experimental results are presented and discussed herein.
AB - Synopsis: Flexural strengthening of reinforced concrete (RC) beams with fiber reinforced polymer (FRP) composites and two different bonding agents were investigated in this research. The bonding agents used in this research consisted of an epoxy paste and a sprayed polyurea. When polyurea was used as the bonding agent, it was sprayed to specific regions on the RC beams. Three RC beams were .flexural strengthened with FRP composites according to the following techniques: (a) sprayed polyurea with and without glass FRP (GFRP) grid reinforcement, and (b) manual layup using one GFRP grid. Experimental results clearly indicate that flexural strengthening with the un-reinforced or reinforced polyurea technique is an effective strengthening scheme. Advantages of using polyurea over other epoxy based methods are that the application process requires significantly less time and the polyurea cures within minutes. Furthermore, no debonding of the un-reinforced or reinforced polyurea system was observed, suggesting a further benefit of this technique. Application of the polyurea system and key experimental results are presented and discussed herein.
KW - GFRP
KW - Grids
KW - Polyurea
KW - Reinforced concrete
KW - Retrofit
KW - Strengthening
UR - http://www.scopus.com/inward/record.url?scp=85071942508&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85071942508&partnerID=8YFLogxK
M3 - Conference article
AN - SCOPUS:85071942508
VL - 2017-October
SP - 845
EP - 856
JO - American Concrete Institute, ACI Special Publication
JF - American Concrete Institute, ACI Special Publication
SN - 0193-2527
IS - SP 327
ER -