混凝土浇筑、振捣及养护注意事项(国外英文资料).docVIP

混凝土浇筑、振捣及养护注意事项(国外英文资料) General requirements for concrete casting and vibration The free fall of concrete from the head of the bucket should not exceed 2m, and the concrete measures must be taken when the height is more than 3m. 2, when the concrete should be segmented, layered continuous casting layer height should be according to the concrete supply capacity, a pouring quantity, concrete initial setting time, structural characteristics, reinforcement density considering the decision. The casting height is usually 1.25 times the length of the vibrator. The insertion type vibrator should be inserted fast, the insertion point should be evenly arranged, the order is carried out in order, and it is not left out. The moving spacing is no more than 1.5 times the vibratory radius (usually 30-40cm). The next layer should be inserted into the next layer, 5-10cm, to keep the two layers of concrete together. When vibrating, the vibratory rod must not touch the embedded parts and the template. The distance between the surface vibrator (or the plate vibrator) should be guaranteed to cover the edge of the vibrators plate. 4, concrete shall be carried out continuously, such as must be intermittent, the intermittent time should be shortened as far as possible, and should be in the first layer of concrete initial setting before the first layer of concrete pouring is completed. The maximum duration of the interval shall be determined according to the concrete conditions of the concrete, the temperature and the concrete conditions of the concrete, and generally more than 2h should be handled according to the construction seam. When concrete condenses time is less than 2h, the initial setting time of concrete should be executed. 5 should be often observe template, pouring concrete, steel bar, reserved holes and embedded parts and steel dowel for mobile, deformation or congestion, found that the problem should be dealt with immediately, and should be in already pouring concrete initia