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Special fine sand high-strength high-performance concrete ultra-high pumping construction method

A high-performance concrete and construction method technology, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the problems of large specific surface area, high void ratio, low water consumption, etc., to reduce cement consumption, The effect of convenient operation and time saving

Active Publication Date: 2008-10-08
中建五局第三建设有限公司 +1
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Problems solved by technology

[0003] However, ultra-fine sand has the characteristics of fine particle size, large specific surface area, high void ratio, and poor gradation. The concrete prepared according to these characteristics can only have low sand rate, low slump and low water consumption. This "three lows" "Phenomenon, it can only be used for low-fluidity concrete or dry hard concrete projects, not for ultra-high pumping concrete with large fluidity

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Embodiment Construction

[0047] The present invention will be further described below in combination with specific embodiments.

[0048] Take the construction of the main structure of reinforced concrete over-limit super high-rise in Chongqing Zhonghua New City as an example.

[0049] 1. Project overview

[0050] The Chongqing Zhonghua New City project is the largest conjoined public building project in my country. The construction area reaches 560,000 square meters, including three floors underground, podium buildings with 5-6 floors above the ground, and 8 towers in Buildings 3-10. field and equipment rooms; the podium building is a multi-functional commercial area, the 3#, 4#, 5#, 8#, 9#, 10# towers are high-end residential buildings with 27-30 floors, and the 6# building is a 37-story high-end hotel apartment office building, 7# building is a 54-story (structure height of 232 meters) office building and a five-star hotel. This project has the characteristics of large overall scale, super high s...

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Abstract

The invention discloses an ultrahigh pumping construction method for ultrafine sand concrete with high performance, which comprises the steps of selecting raw materials with preference, stirring and transporting the ultrafine sand concrete with high performance, preparing for casting, surface roughening of the bond interface of the vertical structure, concrete bestrewing and vibrating, rolling and laminating and secondary trowelling and maintenance. The invention is an ultrahigh pumping construction method for ultrafine sand concrete with high performance, which has the obvious effects of convenient operation, easy pumping, easily controlled contraction crack, being able to reduce cost and save construction period when used in the ultrahigh pumping construction of ultrafine sand concrete with high performance.

Description

technical field [0001] The invention relates to a concrete pumping construction method, in particular to an ultra-fine sand high-strength high-performance concrete ultra-high pumping construction method. Background technique [0002] Chongqing area lacks medium-coarse sand resources, but there are abundant reserves of ultra-fine sand. The scientific and rational use of ultra-fine sand has significant social and economic benefits, which is in line with the principle of "adapting measures to local conditions and using local materials". [0003] However, ultra-fine sand has the characteristics of fine particle size, large specific surface area, high void ratio, and poor gradation. The concrete prepared according to these characteristics can only have low sand rate, low slump and low water consumption. This "three lows" "Phenomenon, it can only be used for low-fluidity concrete or dry hard concrete projects, not for ultra-high pumping concrete with large fluidity. Contents of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04G21/02C04B28/04C04B18/08C04B14/02C04B14/06
CPCY02W30/91
Inventor 唐鹏杨选奎王铎郭新何思
Owner 中建五局第三建设有限公司
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