Orthogonal optimization mix ratio of fiber polymer repair protect mortar and its comprehensive performance realization mechanism

GAO Yibo; LUO Jianlin; LI Zhiqing; ZHANG Jigang; GAO Song; ZHU Xiatong; ZHU Min; ZHANG Liqing

doi:10.13801/j.cnki.fhclxb.20221208.001

Volume 40 Issue 9

Sep. 2023

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GAO Yibo, LUO Jianlin, LI Zhiqing, et al. Orthogonal optimization mix ratio of fiber polymer repair protect mortar and its comprehensive performance realization mechanism[J]. Acta Materiae Compositae Sinica, 2023, 40(9): 5258-5275. doi: 10.13801/j.cnki.fhclxb.20221208.001

Citation:

GAO Yibo, LUO Jianlin, LI Zhiqing, et al. Orthogonal optimization mix ratio of fiber polymer repair protect mortar and its comprehensive performance realization mechanism[J]. Acta Materiae Compositae Sinica, 2023, 40(9): 5258-5275. doi: 10.13801/j.cnki.fhclxb.20221208.001

Citation:

GAO Yibo, LUO Jianlin, LI Zhiqing, et al. Orthogonal optimization mix ratio of fiber polymer repair protect mortar and its comprehensive performance realization mechanism[J]. Acta Materiae Compositae Sinica, 2023, 40(9): 5258-5275. doi: 10.13801/j.cnki.fhclxb.20221208.001

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Orthogonal optimization mix ratio of fiber polymer repair protect mortar and its comprehensive performance realization mechanism

doi: 10.13801/j.cnki.fhclxb.20221208.001

GAO Yibo^1
,,
LUO Jianlin^{1, 2
,
,},
LI Zhiqing¹,
ZHANG Jigang^{1, 2},
GAO Song^{1, 2},
ZHU Xiatong¹,
ZHU Min³,
ZHANG Liqing⁴

1.
School of Civil Engineering, Qingdao University of Technology, Qingdao 266520, China
2.
Collaborative Innovation Center of Engineering Construction and Safety in Shandong Blue Economic Zone, Qingdao 266033, China
3.
The Fourth Construction Limited Center of China Construction Eighth Engineering Bureau, Qingdao 266413, China
4.
School of Civil Engineering and Architecture, East China Jiaotong University, Nanchang 330013, China

Funds: National Natural Science Foundation of China (51878364); Projects from China Construction Eighth Division (JM20191030; QUT-2022-FW-0192; QUT-2022-FW-0028); The National “111” Project, and Gaofeng Discipline Project Funded by Shandong Province

Received Date: 2022-10-13
Accepted Date: 2022-11-26
Rev Recd Date: 2022-11-16

Available Online: 2022-12-09

Publish Date: 2023-09-15

Abstract

Abstract

Under background of carbon peaking and carbon neutrality economic savings, it is urgent to develop high performance repair protect mortar for infrastructure repairing and protecting in complex service environment. In this paper, the effects of steel fiber (SF) dosing, ethylene-vinyl acetate copolymer (EVA) emulsion powder dosing, and the proportion of high-belite sulfate cement and ordinary Portland cement on the workability, mechanical properties, interfacial bonding performance and waterproofing/impermeability durability of the fiber reinforced polymer repair protect mortar (SCPRM) were investigated by Taguchi orthogonal method. Results reveal that the flowability, setting time, flexural strength (f_t), compressive strength (f_c), bond strength at 14 days (f_b^{14 d}), drying shrinkage at 90 days, water absorption after 3 days soaking, surface contact angle and chlorine ion permeability coefficient are 226.0 mm, 41 min/63 min (initial/final setting time), 5.2/17.1 MPa (f_t^{1 d}/f_t^{28 d}), 16.7/73.2 MPa (f_c^{1 d}/f_c^{28 d}), 3.61 MPa (f_b^{14 d}), 16.44×10⁻⁵, 0.16%, 70.04°, and 0.9486×10⁻¹² m²·s⁻¹, respectively. The corresponding macroscopic/microscopic structures show that SFs are uniformly dispersed in the hydration products and the EVA polymer film was netlike distributed. FTIR reveals the hydration feature of compound cementitious system, and the corresponding influence mechanism of its hydration of EVA dosing. Finally, a high-performance repair protect mortar with excellent comprehensive performance and adaptability to complex service environment are successively prepared.
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References(67)

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