Concrete for profiled steel concrete composite structure with C110 in strength grade

Abstract

The invention discloses a concrete for a profiled steel concrete composite structure with C110 in strength grade and is characterized in that the concrete mix ratio to fine aggregate to coarse aggregate to water to water reducer to siliceous dust to coal ash (kg / m<3>) is 450:496:1276:138:9:60:90. A preparation method of the concrete comprises the following steps: adding the fine aggregate and thewater to a forced mixer in proportion by weight, wherein the water accounts for 50% of the total water consumption; evenly stirring the mixture for 1-2min, adding the coarse aggregate for evenly stirring for 2-4min, adding the concrete, the siliceous dust and the coal ash for stirring for 2-3min, and adding the water reducer and the rest of the water; and finally evenly stirring the mixture for 2-3min and discharging to obtain the concrete mixture. The concrete can obviously improve the adhesive property between the profiled steel and the concrete under the natural condition and effectively exert individual capacity and cooperative work performance of the two materials, thereby greatly improving bearing capacity and performance of construction members and enhancing durability, high-volumestability and economy thereof.

Description

technical field [0001] The invention belongs to the technical field of building materials, and relates to an ultra-high-strength and high-performance concrete with a strength grade of C110 for steel-concrete composite structures. Background technique [0002] Since the invention of Portland cement in 1824, concrete technology has developed rapidly, and its usage is large and its application range ranks the highest in the world. Although concrete, a man-made material, is a traditional building material, due to the irreplaceable superiority of this material and the continuous advancement of concrete material science and technology, concrete has become the main body of civil engineering materials. In the future civil engineering and It will also be one of the indispensable main materials in national construction. With the continuous expansion of city scale, population increase, land price increase, construction technology progress and rapid economic development, buildings are ...

AI Technical Summary

Problems solved by technology

[0005] The prior art is used in the preparation technology of high-strength and high-performance concrete whose concrete strength grades are C60, C70, C80, C90 and C100 for steel-concrete composite structures. However, there are still problems that cannot be extended to ultra-high-strength and high-performance concrete, that is, the ultra-high strengthening and ultra-durability of concrete, and it cannot solve the problem of section steel when it is used in steel-concrete composite structures. The problem of poor natural bonding performance with ultra-high-strength high-performance concrete, so it cannot meet the requirements of civil engineering buildings extending into the air, that is, building (ultra) high, (ultra) long-span, (ultra) durable and heavy-duty structures and so on to develop the requirements of this trend

In addition, in the prior art, there are also some preparation technologies for ultra-high strength and ultra-durability of concrete, but none of them involve or solve the natural bonding between section steel and ultra-high-strength high-performance concrete when used in steel-concrete composite structures poor performance problem

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