Experimental Study on Mortar Materials with Fissures Filled withHigh Permeability Modified Epoxy Resin

Abstract

Abstract: Cylindrical mortar specimens containing pre-made fissures were prepared,and fissures were of four kinds of different inclination angles (0°,30°,45° and 60°,respectively).Fissures of specimens were filled with high permeability modified epoxy resin under the effect of gravity and without grouting pressure.Uniaxial compression tests were carried out before and after the process of grouting,correspondingly.Test results show that the high permeability modified epoxy resin permeates into fissures of specimens relying on its own permeability.After solidification,it improves the uniaxial compressive strength (UCS) of specimens with different inclination angles of fissures to various extents.Among them,the improvement of UCS is the most significant when fissures inclination angles are 45° and 60°,respectively.The UCS of specimens decreases gradually with the increase of the inclination angle from 0° to 60°,no matter whether fissures are filled with epoxy resin or not.Failure modes of specimens before and after filling epoxy resin see no much difference,most of which are tensile splitting failures caused by tensile stress.The research results provide some data support and theoretical basis for analyzing the influence of epoxy resin on rock mass strength in practical engineering.

Key words: mortar material, fissure filling, epoxy resin, strength characteristic, permeability, failure mode

CLC Number:

TU452

ZHU Haowei, LIU Changwu, CHEN Xiaoqiang, ZHAO Chao. Experimental Study on Mortar Materials with Fissures Filled withHigh Permeability Modified Epoxy Resin[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(1): 77-82.

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