试验员考试题库《1》（Test questions bank 1）.doc

试验员考试题库《1》（Test questions bank 1） 1. what is the quality control index of earthwork subgrade, base course and asphalt surface compaction? How are these indicators defined? The compaction quality of subgrade and base (except for broken stone and gravel) and asphalt surface is the degree of compaction, and the volume of crushed stone base is solid volume ratio. For Subgrade and base (except for caulking crushed stone compaction is outside), the maximum dry density ratio refers to the actual site reached the dry density and the indoor standard compaction test results; for the asphalt pavement, compaction degree refers to the ratio of the density to the scene and indoor standard density. The volume fraction of solids refers to the ratio of solid volume to total volume. 2. please discuss the main process of sand filling method to determine the degree of compaction. (1) select suitable sand filling barrel; (2) calibrate the quality of the sand in the cone at the bottom of the sand filling tank; (3) demarcate unit quality of measuring sand; (4) choose the flat surface and clean it at the test site; (5) the substrate on a clean surface, along the center hole, cut the material into a plastic bag, all the layers of material removed, called total quality. (6) sampling the materials and putting them into the aluminum box to measure the water content; (7) the substrate is placed in test pit, the sand filling tube placed in the substrate (central sand quality known drum), open the switch, let the sand into the test pit, turn off the switch will not flow, be careful, take the sand filling tube, called residual sand quality. (8) calculate the degree of compaction. 3. please discuss the evaluation method of asphalt pavement deflection. Calculate and evaluate the deflection of a road section: Lr=, +Z, alpha, S Lr - to assess the deflection of a road section; - to assess the average value of the deflection of each measuring point in the road section; S - the criteria for assessing the