高渗透改性环氧树脂充填砂浆材料裂隙试验研究

制作含4种裂隙倾角(0°、30°、45°、60°)的圆柱体砂浆试样,选用高渗透改性环氧树脂作为充填材料,在重力作用下无压力充填试样裂隙,并对充填前后的试样进行单轴压缩试验.试验结果表明:高渗透改性环氧树脂能依靠自身的渗透性渗进试样的裂隙,固化后能不同程度地提高不同裂隙倾角试样的抗压强度,其中45°倾角和60°倾角的试样...

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

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.