Designed Comparative Studies, The Optimum Combination Of High-strength Concrete Flooring And Engineering Structures

Concrete material consumes a great deal of resources and energy sources, and is also one of the largest used architectural materials in the world nowadays. It plays an important part in the development of national economy, and the technical development and application of concrete material influences human sustainable development directly.The high strength concrete(HSC) enjoys the following merits: such as fine durability, high strength and small deformation, so it adapts for the modern engineering construction of high-rise ,long-span and heavy-load buildings. Further more, it may reduce the section of structural member, enlarge utilization area and take from project cost. Therefore, the high strength concrete has been more and more widely used, and has achieved manifest technical and economic benefits.Basing upon the existing theories , experiment criterions and research results, by using orthogonal design method, adopting ordinary Portland cement with fine compound mineral admixture and super plasticizer, the thesis mainly studies mixing proportion optimum design to the series of high strength concrete(C60, C80 and C90). It is mainly about the influence that the differ factors, such as the mix measure ratio , the quantity of compound mineral admixture , the kind of compound mineral admixture and super plasticizer , give to the differ grades high strength concrete performance, through comparative analysis, we abtain the optimum mixing proportions to the series of high strength concrete(C60, C80 and C90) successfully.Combining with its applications among high-rise building vertical load-carrying members, we proceed contrast design studies on structure and economy, abtaining the practical specific characters of high-strength concrete in high-rise building. Through the contrast design studies of high-strength concrete in prestressed concrete rigid frame bridge construction, we draw specific characters and properties of C50 and C80 high-strength concrete in it. and the outcomes of the researches apply to the specific practice project.