Lifting concrete-filled steel tube and production method thereof
A concrete-filled steel tube and jacking technology, applied in the field of building materials, can solve problems such as large shrinkage of concrete, and achieve the effects of increasing the ability to prevent bleeding, increasing strength and cohesion, and improving shrinkage reduction.
Active Publication Date: 2017-07-21
北京市中超混凝土有限责任公司
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Although this type of concrete can easily meet the requirements of high strength
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The invention relates to lifting concrete-filled steel tube, comprising, by weight, 290-350 parts of cement, 160-200 parts of fly ash, 20-30 parts of silica powder, 720-880 parts of fine aggregate, 810-890 parts of coarse aggregate, 12.1-15.5 parts of a compound admixture, and 155-180 parts of water, wherein the compound admixture is composed of polycarboxylate water reducer, a shrinkage reducing agent, high-absorption water resin and sodium alginate. By adding the compound admixture into concrete, shrinkage of the concrete is further reduced at the premise of ensuring high compressive strength of the concrete.
Description
technical field [0001] The invention relates to the technical field of building materials, in particular to a jacking steel pipe concrete and a preparation method thereof. Background technique [0002] With the deepening of theoretical research on building science and the emergence of new construction techniques, there are more and more high-rise and super high-rise buildings, and the concrete-filled steel tube structure is also increasingly widely used. The most effective pump in the construction process of concrete pouring inside the steel tube The jacking up method has also been rapidly and widely used. The pumping jacking process uses the pumping pressure of the concrete delivery pump to pour self-compacting concrete from the bottom of the steel pipe column, and flows inside the steel pipe from bottom to top until it fills the entire steel pipe column. It has the characteristics of high construction quality, no intersecting operation with the steel structure, and short ...
Claims
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CPCC04B28/00C04B2111/00146C04B2201/52C04B18/08C04B14/068C04B14/02C04B18/146C04B2103/302C04B2103/0051C04B24/38C04B2103/0068
Inventor 余成行刘敬宇陈学政肖鑫王友超谢光辉
Owner 北京市中超混凝土有限责任公司