To optimize the bonding performance between prefabricated concrete and wood in adhesive-bonded timber-concrete composite (TCC) system, the authors conducted quasi-static shear tests on several types of TCC joints bonded with epoxy resin in this study. The experimental variables considered were (1) concrete surface conditions (i.e. sandblasted, sanded and non-treated), (2) concrete type (i.e. normal strength concrete (NSC), high strength concrete (HSC) and ultra-high-performance concrete (UHPC)), and (3) wood species (i.e. glulam GL24 made of spruce and beech wood). The test results showed that the surface treatment on NSC (sandblasted) and HSC (sanded) significantly increased the shear bond strength of the TCC joints and changed the predominant failure mode from tearing-off of mortar-facial covers into failures in concrete substrates. Upon the surface treatment, using HSC increased the shear bond strength compared with the TCC joints using NSC. The joints with UHPC predominantly failed in the adhesive/concrete interface, and adhesion between adhesive and concrete, due to that the low porosity of UHPC impeded the penetration of epoxy resin into the substrate. When being bonded with UHPC, compared with the GL24 made of spruce, the beech wood increased the shear bond strength, since the wood-failure percentage decreased in the joints using beech wood. Furthermore, bond-line areas of all types of joints were examined under an optical microscope, to reveal the morphology (i.e. profile of a glue line, glue-line thickness, and penetration of resin into substrates). It was found that epoxy used in this study with a high initial viscosity (i.e. 6000 mPa·s at 23 °C) is suitable to bond surface-treated concrete and engineered wood, from the perspectives of penetration into substrates, the thickness of glue lines, and workability during gluing processes.

为了优化预制混凝土与木材在胶合木材-混凝土复合材料（TCC）系统中的粘合性能，作者在本研究中对几种用环氧树脂粘合的TCC接头进行了准静态剪切试验。考虑的实验变量是（1）混凝土表面条件（即喷砂，磨砂和未处理），（2）混凝土类型（即，普通强度混凝土（NSC），高强度混凝土（HSC）和超高性能混凝土（ UHPC）），以及（3）木材种类（即由云杉和山毛榉木材制成的胶合木胶GL24）。测试结果表明，对NSC（喷砂处理）和HSC（喷砂处理）进行的表面处理显着提高了TCC接头的抗剪粘结强度，并将主要破坏模式从砂浆面层的撕裂变为混凝土基底的破坏。经过表面处理后，与使用NSC的TCC接头相比，使用HSC可以提高剪切粘结强度。由于UHPC的低孔隙率阻碍了环氧树脂渗透到基材中，因此与UHPC的接头主要在胶粘剂/混凝土界面以及胶粘剂与混凝土之间的粘合中失效。当与UHPC粘合时，与由云杉制成的GL24相比，榉木提高了剪切粘合强度，因为使用榉木的接缝中的木材破坏率降低了。此外，在光学显微镜下检查所有类型接头的粘合线区域，以揭示其形态（即胶线的轮廓，胶线的厚度以及树脂向基材的渗透）。发现本研究中使用的环氧树脂具有较高的初始粘度（即