A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Photocurable resin as rapid in-situ protective coating for slag concrete against dry shrinkage
Highlights It is the first time to use photocurable resin to prepare a protective coating for concrete in-situ rapidly. The influence of in-situ coating on the drying shrinkage and mechanical properties of slag concrete was analyzed. The photocurable coating effectively improves the waterproof and impermeable performance of the slag concrete. The hydration products and microstructure were analyzed by XRD, TGA, FTIR, and SEM.
Abstract Slag concrete has the advantages of low hydration heat evolution and a low carbon footprint, but the impact of drying shrinkage will increase the risk of cracking concrete components. To achieve low-cracking performance, dry shrinkage was prevented against water evaporation by an in-situ coating of the concrete with a photocurable resin. In this study, polyurethane-acrylic resin was applied as an in-situ coating on the surface of slag concrete by UV polymerization for the first time. The purpose of the experiment is to explore the feasibility of using photocurable resin as a surface protective coating for general construction. The experimental results show that the drying shrinkage percentage of slag concrete samples after 28 days is reduced by 40%, the compressive strength of the test block increases by 1.67 times, and the tensile strength increases by 1.8 times. The photocurable resin in-situ protective coating can adhere tightly to the surface of the substrate, inhibiting water evaporation in the sample, and providing a moist internal curing environment that effectively alleviates shrinkage. Crack propagation on the concrete surface was also greatly prevented, resulting in a more deviated crack propagation behavior; therefore, the ductility of slag concrete is improved.
Photocurable resin as rapid in-situ protective coating for slag concrete against dry shrinkage
Highlights It is the first time to use photocurable resin to prepare a protective coating for concrete in-situ rapidly. The influence of in-situ coating on the drying shrinkage and mechanical properties of slag concrete was analyzed. The photocurable coating effectively improves the waterproof and impermeable performance of the slag concrete. The hydration products and microstructure were analyzed by XRD, TGA, FTIR, and SEM.
Abstract Slag concrete has the advantages of low hydration heat evolution and a low carbon footprint, but the impact of drying shrinkage will increase the risk of cracking concrete components. To achieve low-cracking performance, dry shrinkage was prevented against water evaporation by an in-situ coating of the concrete with a photocurable resin. In this study, polyurethane-acrylic resin was applied as an in-situ coating on the surface of slag concrete by UV polymerization for the first time. The purpose of the experiment is to explore the feasibility of using photocurable resin as a surface protective coating for general construction. The experimental results show that the drying shrinkage percentage of slag concrete samples after 28 days is reduced by 40%, the compressive strength of the test block increases by 1.67 times, and the tensile strength increases by 1.8 times. The photocurable resin in-situ protective coating can adhere tightly to the surface of the substrate, inhibiting water evaporation in the sample, and providing a moist internal curing environment that effectively alleviates shrinkage. Crack propagation on the concrete surface was also greatly prevented, resulting in a more deviated crack propagation behavior; therefore, the ductility of slag concrete is improved.
Photocurable resin as rapid in-situ protective coating for slag concrete against dry shrinkage
Zhou, Fengyang (author) / Huang, Jian (author) / Jian, Shouwei (author) / Tan, Hongbo (author) / Lv, Yang (author) / Hu, Hailong (author) / Wang, Wufeng (author) / Yang, Rong (author) / Manuka, Mesfin (author) / Yin, Yunchao (author)
2023-06-14
Article (Journal)
Electronic Resource
English
Characteristic shrinkage evaluation of photocurable materials
| British Library Online Contents | 2016
PHOTOCURABLE RESIN COMPOSITION AND GRAPHITE SHEET WITH PROTECTIVE LAYER
| European Patent Office | 2015