Ultra‐Fast Preparation of High‐Strength Polymer Concrete via Frontal Polymerization at Room Temperature

Author:

Sun Jiongfeng1,Wang Rui1,Xue Guangjie1,Qiao Guofu123ORCID

Affiliation:

1. School of Civil Engineering Harbin Institute of Technology Harbin 150090 China

2. Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education Harbin Institute of Technology Harbin 150090 China

3. Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology Harbin Institute of Technology Harbin 150090 China

Abstract

AbstractConcrete, in particular application scenarios, such as crack repair, disaster rescue and relief, and 3D printing, needs to be cured quickly. In this work, a novel synthesis strategy, UV‐initiated frontal polymerization (FP), for fast preparation of high‐strength polymer concrete at room temperature is proposed, and the whole fabrication progress within several minutes, in which coarse aggregates and a small amount of short carbon fibers (CF) are used to enhance mechanical properties and heat conduction and reduce the amounts of chemical adhesives. SEM, DSC, MIP, Ultra depth of field microscope, and Rheometer are employed to characterize the properties of chemical adhesives, polymer concrete, and polymerization process. In addition, the finite element method is used to investigate the internal temperature field status of the FP process. The results indicate that the compressive and flexural strengths of the polymer concrete with 1.0 wt%‐1 mm‐CF‐50 vol.%‐quartz sand exceeded 70 and 20 MPa, respectively, in which the average self‐propagation velocity reached 58 mm min−1. The investigation provides a promising approach for the rapid construction of structural facilities, emergency repair after disasters, 3D printing concrete, etc.

Funder

National Key Research and Development Program of China

Publisher

Wiley

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