Title:
Restored Strength of Cracked Concrete Beam Repaired by Epoxy and Polymethyl Methacrylate
Author(s):
Yu-Cheng Kan, Tsong Yen, and Ming-Gin Lee
Publication:
Materials Journal
Volume:
105
Issue:
5
Appears on pages(s):
451-458
Keywords:
crack; epoxy; PMMA; repair
DOI:
10.14359/19974
Date:
9/1/2008
Abstract:
This paper presents a research work on the bonding characteristics of epoxy mortar and polymethyl methacrylate (PMMA)-based mortar to repair concrete cracks. The feasibility of using both materials to repair various types of cracks of various widths in concrete is examined. The propagation path of a flexural crack or a shearing crack was predicted using a dynamic finite element code. Such cracks were then produced experimentally in an appropriate test configuration. The bonding performance of the materials used to repair the crack was examined. Test results revealed that concrete with a flexural crack has a higher restoring efficiency than that with a shearing crack when repaired with epoxy mortar or PMMA mortar. Increasing the amount of sand inclusions in the mortar increases the restoring efficiency, allowing good workability to be achieved.