The paper reports the construction and surcharge load-testing of three (3) large-scale (~2.50 m-tall) GRS bridge abutment models in an outdoor test station to investigate the influences that the facing type and reinforcement spacing could have on their load-bearing performance. The facing types examined included cored Concrete Masonry Units (CMU) in Model #1 and much larger solid concrete blocks in Models #2 and #3. Reinforcement spacing in the first two models was 0.20 m, whereas it was increased to 0.30 m in the third model. Results show that using large facing blocks in GRS abutments could lead to significant improvements in their load-deformation performance relative to those with the CMU facing alternative. This improvement was observed even in the case of model with increased reinforcement spacing. Therefore, use of larger facing blocks could also help reduce the cost of GRS abutments by reducing the need for tighter reinforcement.

本文报告了三 (3) 个大型（~2.50 米高）GRS 桥台模型在室外试验站的施工和附加荷载试验，以研究面板类型和钢筋间距对其荷载的影响-轴承性能。所检查的饰面类型包括模型 #1 中的带芯混凝土砌块单元 (CMU) 和模型 #2 和 #3 中更大的实心混凝土砌块。前两个模型中的钢筋间距为 0.20 m，而在第三个模型中增加到 0.30 m。结果表明，在 GRS 基台中使用大面块可以显着改善其载荷变形性能，相对于使用 CMU 面替代方案的那些。即使在钢筋间距增加的模型中也观察到了这种改进。所以，