外文翻译高层建筑施工控制要点.docxVIP

文献翻译 High-rise building construction control points construction process. Data statistics show Ruoyin increase the moisture content of sand, sand rate fell 2% to 3%, concrete strength will be decreased by 15% to 20%, while the quantity of cement and 5% to 20%, gravel and sands affect 5% to 20%; water-cement ratio affect more by l%, 5% strength of a 10% reduction. Since the impact so great, it should take appropriate measures to control. (1) According to the regional market conditions for different proportions of raw materials testing, construction process to ensure the timely adjustment of the ratio, such as 5 ~ 40mm stones, M 2.3 fine sand to do a ,5-40mm gravel, M ≥ 2.3 in the sand to do a set of so. (2) the ratio of combination of laboratory water content of raw materials, for construction with mud content ratio adjusted to ensure that the ratio of the actual laboratory versatility. In the actual construction work to strengthen the checks of raw materials, sand and gravel gradation bad, take appropriate measures to adjust, such as the amount of incorporation of 0.5? L ~ 10? L sand and gravel.2.2 The strict conservation system By pumping concrete high-rise building and more. Pumping concrete can not only shorten the construction period, but also to improve the performance of concrete construction. However, the use of certain projects that the ratio of raw materials, vibration control strictly the case, there is still lack of concrete strength. Ana1 Introduction With the vigorous development of Chinas economy, building science and construction technology has been developing rapidly. Especially in urban areas, with land full of tension and further the comprehensive utilization of land, high-rise buildings are increasingly becoming the main urban construction. In general, 9 ~ 16 layers (50m) for a class of high-level, 17 to 25 layers (75m) for the second category level, 26 to 40 layers (100m) for the three high-level, 40 layer ( 100m) for the super