大工11秋《建筑施工》在线作业2（Big work 11 autumn construction work online homework 2）.docVIP

大工11秋《建筑施工》在线作业2（Big work 11 autumn construction work online homework 2） In autumn 11 construction of online homework 2 1. concrete construction in winter, the stirring time should be stirring time at room temperature (times). A. 0.85 times B. 1 times C. 1.1 times D. 1.5 times Answer: D score: 4 points score: 4 2. key problems of large volume concrete pouring is (). A. cement hydration heat, accumulate in the internal cause internal temperature, and surface cooling rapidly, the temperature difference between inside and outside, cracks in the concrete surface B. cement paste and aggregate separation C. note after pouring and maintenance, to prevent cracking The contradiction between D. high workability and hardened to solve concrete mechanical property and durability of concrete Answer: A score: 4 points score: 4 3. in aerated concrete block transportation, loading and unloading, forbid throwing and dumping, the approach should be according to the varieties and specifications were neatly stacked, stacking height (should). A. should not be less than 5m B. should not be more than 5m C. should not be less than 2m D. should not be more than 2m Answer: D score: 4 points score: 4 4. steel weldability (commonly used) to estimate. A. yield point B. carbon equivalent C. extension rate The tensile strength of D. Answer: B score: 4 points score: 4 5. each floor walls to a certain height, the walls were leveling level in each, and on the wall from the pop-up indoor ground line mm (high level), this line is the floor of the indoor decoration construction, elevation control basis. A. 50mm B. 100mm C. 500mm D. 800mm Answer: C score: 4 points score: 4 The 6. column concrete should be built after the height of a floor, and mortar strength after continuous casting (to). A. 1MPa B. 1.2MPa C. 2.0MPa D. 2.4MPa Answer: A score: 4 points score: 4 7. brick shape is rectangular hexahedron, the specifications for the (). A. 240mm * 115mm * 53mm B. 240mm * 120mm * 60MM C. 240mm * 110mm * 55mm