Research on Improvement of Slope Protection Concrete Precast Block Joints Based on Physical Model Experiment

Precast concrete block slope protection is widely used due to its advantages of easy detection and laying, ease organization, the limited time required for construction. In order prevent soil or gravel bedding precast from being subjected wind wave pressures, joints between blocks are usually filled with mortar. However, existing standards do not specify width material joints. Furthermore, excessively wide mortar shrinkage can result in loss, a hollowed-out cushion, damage slope, thus compromising quality engineering. To establish controlling seams, this paper designed conducted physical model test revetment seams. By embedding pore water pressure sensors cushion layer, changes were observed under varying conditions, including different sensor locations, levels front embankment, joint widths. Based on results, design widths recommendations treatment materials proposed. After adding amounts calcium oxide–calcium sulfoaluminate composite expansion agent (HME) into material, also carried out shear contact surface after oxide-calcium material. Following microporous structure test, construction The results indicate that closely related position level paving seam. When masonry seam increased 0.5 mm 1 1.5 mm, variation ranges 40–80% 6–20%, respectively, latter significantly lower than former. Therefore, practical engineering, should take account impact position, dike, width. Mortar shedding within range climbing height be addressed promptly, controlled below cm as much possible effectively surface. addition an improve bond strength certain extent. study found 8% content resulted best densest microstructure. These research findings serve basis development control protection.