Volume 39 Issue 11
Nov.  2022
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WANG Zuohu, WANG Jiangbei, SHEN Shuyang, et al. Effect of freeze-thaw cycles on bond properties of FRP sheet-brick[J]. Acta Materiae Compositae Sinica, 2022, 39(11): 5275-5286. doi: 10.13801/j.cnki.fhclxb.20220110.003
Citation: WANG Zuohu, WANG Jiangbei, SHEN Shuyang, et al. Effect of freeze-thaw cycles on bond properties of FRP sheet-brick[J]. Acta Materiae Compositae Sinica, 2022, 39(11): 5275-5286. doi: 10.13801/j.cnki.fhclxb.20220110.003

Effect of freeze-thaw cycles on bond properties of FRP sheet-brick

doi: 10.13801/j.cnki.fhclxb.20220110.003
  • Received Date: 2021-11-15
  • Accepted Date: 2022-01-01
  • Rev Recd Date: 2021-12-31
  • Available Online: 2022-01-11
  • Publish Date: 2022-11-01
  • The effect of freeze-thaw cycles on the interfacial bonding properties of fiber reinforced polymer (FRP) sheet reinforced blocks was studied. Two kinds of fiber sheets, carbon fiber reinforced polymer (CFRP) sheet and glass fiber reinforced polymer (GFRP) sheet, were used to strengthen clay brick and shale brick respectively. The tests of various material properties, pull-off bond and single-lap shear bond were carried out to study the effect of freeze-thaw times. The results show that the mechanical properties of clay brick, shale brick, mortar block, CFRP sheet, GFRP sheet and epoxy resin are seriously affected by freeze-thaw cycles, and all decrease significantly with the increase of freeze-thaw times. The pull-off bond strength and single-lap shear bond strength of FRP sheet and brick gradually decrease with the increase of freeze-thaw times. After 30 freeze-thaw cycles, the pull-off debonding force of FRP sheet and brick block is reduced by 45.49%, and the single-lap shear bond strength of FRP sheet and brick block is reduced by 42.26%. The type of FRP sheet has little effect on the pull-off bond strength under different freeze-thaw times, but has a certain effect on the single-lap shear bond strength.

     

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