Toughness improvement of epoxy resin mortar by incorporation of ground calcium carbonate

•The impact toughness of ERM had greatly improved with GCC addition.•GCC induced lots of crazes and triggered extensive plastic deformation in ERM.•The interface boundary between epoxy matrix and fillers (sand and GCC) was perfect.•The high-performance repair mortar is obtained through orthogonal ex...

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Bibliographic Details
Published in:Construction & building materials 2015-12, Vol.100, p.122-128
Main Authors: Li, Yue, Liu, Xiongfei, Yuan, Junjie, Wu, Miaoke
Format: Article
Language:English
Subjects:
Analysis
Calcium carbonate
Epoxy resin mortar
Epoxy resins
Fracture mechanics
Fracture toughness
Ground calcium carbonate
Impact toughness
Mechanical properties
Orthogonal experiment
Properties
Surveys
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Summary:•The impact toughness of ERM had greatly improved with GCC addition.•GCC induced lots of crazes and triggered extensive plastic deformation in ERM.•The interface boundary between epoxy matrix and fillers (sand and GCC) was perfect.•The high-performance repair mortar is obtained through orthogonal experiment. In this paper, ground calcium carbonate (GCC) was selected to improve the properties of epoxy resin mortar (ERM). The results indicated that the flexural strength and ratio of flexural strength to compressive strength of ERM got great increase by incorporation of GCC. At the same time, the impact toughness of ERM had greatly improved with GCC. To some extent, it increased with increasing addition of GCC. Scanning electron microscope (SEM) analysis illustrated the toughening mechanism of ERM filled with GCC. Through orthogonal experiment, the optimal combinations of the process parameters for a high-performance repair mortar are obtained.
ISSN:0950-0618
DOI:10.1016/j.conbuildmat.2015.09.054