4.7 Article

Fabrication of graphene oxide/fiber reinforced polymer cement mortar with remarkable repair and bonding properties

Journal

JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
Volume 24, Issue -, Pages 9413-9433

Publisher

ELSEVIER
DOI: 10.1016/j.jmrt.2023.05.144

Keywords

Repair mortar; Graphene oxide; Comprehensive properties; Bonding interfaces; Microstructure; Micro; nano enhancement; mechanism

Ask authors/readers for more resources

Using high performance mortar for repair and protection of damaged structures is cost-effective and low-carbon emission. Graphene oxide (GO)/steel fiber (SF) reinforced ethylene vinyl acetate (EVA) polymer compound sulfoaluminate cement repair mortar (GOCRM) was directly prepared by water-reducer sonication dispersion and shear mix method. GOCRM showed good workability, mechanical properties, and durability, and the addition of sulfoaluminate cement, EVA, and GO improved the microstructure and bonding strength between GOCRM and the old substrate.
It is cost-effective and low-carbon emission using high performance mortar to repair and protect damaged structures. Here, graphene oxide (GO)/steel fiber (SF) reinforced ethylene vinyl acetate (EVA) polymer compound sulfoaluminate cement repair mortar (GOCRM) was directly prepared by water-reducer sonication dispersion and subsequent shear mix method. The workability, mechanical properties, and durability of GOCRM were systematically investigated along with microstructure and micro/nano enhancement mechanism evaluation. The flowability, initial/final setting time, 1 day/28 days flexural, 1 day/28 days compressive, interfacial bonding strength (fb), 90 days drying shrinkage, 3 days water absorption rate, contact angle and migration coefficient of chloride ion of GOCRM at 0.03% GO dosage reach 192.0 mm, 35 min/53 min, 8 MPa/19.9 MPa, 21.3 MPa/79.3 MPa, 4.93 MPa, 1.051x10-4, 0.1%, 80.96 & DEG; and 2.322x10-13 m2/s, respectively. Microscopic morphology, Fourier transform infrared spectroscopy, and X-ray diffraction spectra of mortars with varied curing ages demonstrate that sulfoaluminate cement, EVA, GO incorporation can improve the microstructure in interiors and at interfaces of mortars by filling micro-pores between products and promoting hydration degree. Accordingly, tighter bonding surface, higher fb and superior bond durability between GOCRM and the old substrate are achieved. These indicate that GOCRM can advantageously serve as high-performance repair mortar with superior fast repair capability, and long-term repair stability. & COPY; 2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.7
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available