Data set for comparing different bond wrench test procedures (set-up and specimen's type)

The data set contains the results of a comprehensive investigation of the flexural bond behavior in brick masonry by means of bond wrench tests, with a focus on the influence of the testing procedure. In this context, the study explores the impact of the testing set-up's accuracy and the specimen type on the experimental assessment of the flexural bond strength. Additionally, the data set includes the results of a novel procedure to assess the flexural bond fracture energy.<br>The data set contains the results of the followings:Experimental assessment of flexural bond strength with set-ups with increasing accuracy: manually-operated vs computer controlled set-ups.(A) Force-controlled set-up entirely operated by hand for in-situ applications.(B) Force-controlled set-up operated by hand for lab applications.(C) Computer-controlled set-up operated by controlling the crack mouth opening displacement (CMOD) at the tension side of the tested specimen for labapplications.Experimental assessment of flexural bond strength of three different types of masonry specimens using the (A) in-situ bond wrench test: with/without head joints and couplets vs wallet.(D) “Standard”, stack-bonded couplets (without head joint).(E) Running-bonded couplets (with head joint).(F) Running-bonded wallets (with head joint and courses).Experimental assessment of flexural bond fracture energy using the (C) computer-controlled bond wrench test.<br>For both force-controlled set-ups, the maximum force registered during the test is reported together with the dimensions of the tested bed joint and weight of the portion of specimen pulled off. For the computer-controlled set-up, the force measured at the relative CMOD and Jack displacement are provided along with the dimensions of the tested bed joint and weight of the portion of specimen pulled off. Detailed pictures of the set-ups and specimens are also included.<br>Tests were performed on two traditional Dutch masonry types, i.e. calcium silicate brick masonry with a 1:3 (cement: sand proportions by volume) cement-based mortar and clay brick masonry with a 1:2:9 (cement: lime: sand proportions by volume) cement-lime mortar. <br>

本数据集包含通过粘结扳手试验（bond wrench test）开展的砖砌体（brick masonry）弯曲粘结性能（flexural bond behavior）综合调研结果，重点关注试验流程的影响。在此研究框架下，本工作探讨了试验装置精度与试件类型对弯曲粘结强度（flexural bond strength）试验评估的影响。此外，本数据集还包含一种新型弯曲粘结断裂能（flexural bond fracture energy）评估方法的试验结果。

本数据集涵盖以下几类试验结果：不同精度等级试验装置下的弯曲粘结强度试验评估：手动操作式与计算机控制式装置。(A) 适用于现场检测的全手动力控制试验装置；(B) 适用于实验室场景的手动力控制试验装置；(C) 适用于实验室场景、通过控制受拉侧试件裂缝口张开位移（crack mouth opening displacement, CMOD）实现计算机控制的粘结扳手试验装置。采用(A)现场粘结扳手试验对三类不同砌体试件的弯曲粘结强度进行评估：带/无顶头灰缝的对开试件与通缝砌体试件。(D) “标准”平叠对开试件（无顶头灰缝）；(E) 顺砌对开试件（带有顶头灰缝）；(F) 顺砌通缝砌体试件（带有顶头灰缝与砖皮层数）。采用(C)计算机控制式粘结扳手试验开展的弯曲粘结断裂能评估。

针对两类手动力控制试验装置，本数据集记录了试验过程中测得的最大荷载，同时附带受检灰缝（bed joint）尺寸与被拉脱试件部分的重量。对于计算机控制式试验装置，数据集同时提供了对应CMOD下测得的荷载、千斤顶位移数据，以及受检灰缝尺寸与被拉脱试件部分的重量。此外，数据集还包含试验装置与试件的详细实拍照片。

本次试验采用两种传统荷兰砌体类型：一是采用体积配合比为1:3（水泥:砂）水泥基砂浆（cement-based mortar）的硅酸钙砖（calcium silicate brick）砌体，二是采用体积配合比为1:2:9（水泥:石灰:砂）水泥石灰砂浆（cement-lime mortar）的黏土砖（clay brick）砌体。