Summary of Emery Ground Construction and Use:
人气： Article Source: Unknown Popularity: 发表时间：2018-12-29 -Published time: 2018-12-29
Summary of construction and use on emery ground: 金刚砂 )由必定颗粒级配的矿产合金骨料、特种水泥、其它掺合料和外加剂组成。 Emery ground hardener ( corundum ) is composed of mineral alloy aggregate with certain particle size, special cement, other admixtures and admixtures. Emery bottom has high abrasion resistance, high impact resistance, high oil resistance, grease function, easy to clean, easy to construct, reduce dust and other benefits. It is widely used on the upper floors of various buildings. 金刚砂 耐磨地坪具有外表硬度高、密度大、耐磨、不发生尘土、不简略剥离、施工经济、适用范围广等利益。 The corundum wear-resistant floor of an industrial plant has the advantages of high appearance hardness, high density, wear resistance, no dust, no simple peeling, economic construction, and wide application. 金刚砂 耐磨地坪摒弃了传统的混凝土底层和面层分隔施工的操作方法，从而消除了因为地上底层与面层结合不良而导致裂缝和空鼓等地上质量通病，简化了地上的施工程序，缩短了地上施工周期，节省了人力和材料费用。 The overall corundum abrasion resistant floor abandons the traditional operation method of separate construction of the concrete base layer and the surface layer, thereby eliminating common ground quality problems such as cracks and hollow drums due to the poor combination of the ground layer and the surface layer, simplifying the construction process on the ground , Shortening the construction cycle on the ground, saving manpower and material costs. Corundum is therefore widely used in the construction of industrial plants, warehouses, runways, and docks. Emery is a metal oxide aggregate or metal aggregate hardener. The aggregate phase composition is mainly metal oxides such as Al2O3, Fe2O3, TiO2 or metal material aggregates. Metal oxide aggregates can be natural or artificially sintered products. Emery is directly applied to the concrete surface of the initial setting stage by the dry spreading method to obtain better wear resistance and impact resistance than non-metallic aggregates. The corundum is integrated with the concrete base, so it is not easy to fall. 金刚砂 地上和VNA区(高架区) 金刚砂 超平地上还没有相关的国家规范和相应的施工模范能够借鉴，而国外对 金刚砂 地上施工的相关文献也很少。 At present , there is no relevant national code and corresponding construction model for the emery ground and VNA area (elevated area) super flat ground, and there is very little foreign literature on emery ground construction. Therefore, the internationally recognized ground flatness and levelness standards are mainly the British Con-certe Society's BS Table7.1 specification and the American Concrete Association's ACI117 specification. 金刚砂 地上质量规划和操控一般参照美国的ACI117规范，而美国的ACI117规范引荐运用F-number系统用来描述地上平整度和水平度。 Emery industrial plant floor quality planning and control generally refer to the American ACI117 specification, and the American ACI117 specification recommends the use of the F-number system to describe the ground flatness and levelness. 金刚砂 地上平整度与水平度有必要具有两个相互独立的F-number。 The system methodology states that the flatness and levelness on the emery ground must have two independent F-numbers. That is, the flatness F-number (FF) and the horizontality F-number (FL) are mutually dependent and confirmed. The main reasons for the large-scale floor of traditional large-area concrete to briefly show the ground cracks are: changes in temperature and humidity caused changes in the internal stress on the ground, brittleness and unevenness of the laying of the concrete, unqualified construction materials, and the nature of the concrete after condensation Shortening and uneven settlement of ground construction. During the hardening of the concrete, the cement releases a lot of hydration heat, which causes the internal temperature on the ground to rise continuously and produce tensile stress on its surface. However, during the late cooling process of the ground, the ground foundation, old concrete, or internal binding forces, Tensile stress can also occur inside concrete. The decrease in temperature will also cause greater tensile stress on the concrete surface. When these tensile stresses exceed the crack resistance of concrete, cracks occur. The internal humidity of general corundum concrete is very small and slow, and the external humidity may be changed greatly or even drastically. For example, dry and wet changes and inadequate maintenance, the appearance of dry shrinkage and deformation due to the binding of the internal concrete on the ground often leads to crack. Concrete is a brittle material, and its tensile strength is about 1/10 of the compressive strength. Because of uneven raw materials, unstable water-cement ratio, and segregation during material transportation and ground pouring, the The tensile strength is uneven, and there are many thin parts with low tensile strength and easy to show cracks. In reinforced concrete, the tensile stress is mainly borne by the steel bar, and the concrete only bears the compressive stress. However, the tensile stress is presented inside the plain concrete or the edge of the reinforced concrete, which must be supported by the concrete itself. In construction, the concrete is cooled from the highest temperature to the stable temperature during normal use, which often causes considerable tensile stress in the concrete. Sometimes the temperature stress can cross the stress caused by other external loads, so it is especially important to master the rules for changing the temperature stress in ground construction.
金刚砂,地面,施工,及,用途,概况,总结,金刚砂, Keywords for this article: emery, ground, construction, and, uses, overview, summary, emery,