Concrete with strength grade of C100 used for steel reinforced concrete combined structure

Abstract

The invention discloses a concrete with strength grade of C100 for composite structure of section steel reinforced concrete, wherein the mix proportion of the concrete is 450 : 510 :1190 :144 : 12 : 60 : 90 of cement : coarse aggregate : fine aggregate : water : high efficiency water reducing agent : silica fume : fly ash, and the unit is Kg / m3. The concrete has the advantages of good mechanical property (comprises strength property, plasticity property and bonding capacity among the section steels), sound working property, good durability and relatively low cost and is adapted for composite structure of section steel reinforced concrete, further using the concrete can reduce construction procedure, save steels, increase construction efficiency and obtain significant economic benefit.

Description

[0001] The present invention is filed on March 22, 2006, the application number is: 200610041959.5, and the title of the invention is: a divisional application for concrete used in steel-concrete composite structures technical field [0002] The invention relates to a concrete, in particular to a concrete with a strength grade of C100 for a steel-concrete composite structure. Background technique [0003] The steel high-strength high-performance concrete composite structure is the application of new high-tech concrete in the steel-steel concrete (SRC) composite structure. Among them, steel-concrete composite structure (SRC structure for short) is a main form of steel-concrete composite structure. Tall and supertall buildings in structural and seismic zones. Compared with the steel structure, the SRC structure can save a lot of steel, increase the section rigidity, overcome the disadvantages of the steel structure such as poor fire resistance and durability, and easy bucklin...

AI Technical Summary

Problems solved by technology

At present, there are generally two ways to deal with the bond-slip problem between steel and concrete in engineering design: one is to add shear connectors on the surface of the component, which will inevitably cause inconvenience in construction and increase the cost; the other is to Reduce the bearing capacity of components to consider the influence of bond slip, so there must be uneconomical factors

On the other hand, in the design of engineering structures, there is a phenomenon of emphasizing strength and ignoring durability. There have been many problems with the safety and durability of concrete structures during use at home and abroad.

Some concrete structures completely lose their function and bearing capacity due to alkali-aggregate reaction, chloride ion erosion and other reasons when they are used for less than half of the design life. Some projects even collapse partially or overall, causing casualties or damage to building facilities.