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Mass concrete anti-crack construction method

A technology of mass concrete and construction method, which is applied in the direction of foundation structure engineering, building, foundation structure test, etc., to achieve the effect of strong applicability, cost saving, and avoiding excessive temperature difference between inside and outside

Pending Publication Date: 2021-11-30
CHINA NAT CHEM ENG NO 16 CONSTR
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0018] The technical problem to be solved by the present invention is to provide a large-volume concrete anti-crack construction method, which solves the problems of the existing pile foundation construction technology, replaces the traditional pile foundation construction technology with the anti-floating anchor construction technology, and saves resources , which reduces the cost; as an anti-floating measure, the anchor rod fully embodies the concept of green building. Anti-floating measures, compared with other solutions, have great cost and environmental advantages

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Embodiment Construction

[0082] Such as Figure 1~Figure 2 Among them, a mass concrete anti-cracking construction method comprises the following steps:

[0083] S1, raw material ratio and control:

[0084] (1) Choose low heat of hydration cement, preferably fly ash cement or low heat Portland cement or low heat slag Portland cement; the conditions are as follows: the heat of hydration in 3 days is not more than 240kJ / kg, the heat of hydration in 7 days is not Greater than 270kJ / kg;

[0085] (2) Coarse and fine aggregates are mixed and continuously graded; fine aggregates are made of medium sand, and the particle size of coarse aggregates is 5 mm to 31.5 mm; both coarse and fine aggregates are materials with a water absorption rate of less than 3%; coarse aggregates and fine aggregates are The mass ratio of aggregate is not less than 0.5;

[0086] (3) Add low-alkali, low-volume, high-efficiency UEA concrete as an expansion agent, add a retarder, and add fly ash as a gel substance; the water-cement r...

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Abstract

The invention discloses a mass concrete anti-crack construction method. The internal temperature of the concrete is monitored through an embedded electronic thermometer, the internal temperature of the concrete is regulated and controlled in real time, cracks are prevented, and the construction quality is guaranteed. The method of arranging water-cooling pipes inside concrete and covering heat preservation outside the concrete is adopted, the temperature difference inside and outside the concrete is controlled, cracks are prevented, the construction quality is guaranteed, the construction progress is guaranteed, and meanwhile the cost is saved. According to the method, multi-aspect measures are adopted for control, and multi-angle optimization from raw material control to construction process control is achieved, so that the overall hydration heat is released gently in the construction process, and heat accumulation is not likely to be formed; through real-time temperature monitoring, the situation that when the temperature changes rapidly, the internal and external temperature difference fluctuates greatly, and the reaction is not timely is avoided; internal cooling pipe water circulation is adopted, internal temperature accumulation is effectively controlled; when the internal temperature rises rapidly, the internal temperature can be effectively reduced, and the situation that the internal and external temperature difference is too large, and the concrete quality is affected is avoided.

Description

technical field [0001] The invention belongs to the technical field of large-volume concrete construction, and in particular relates to a large-volume concrete anti-crack construction method. Background technique [0002] Mass concrete construction is often involved in modern buildings, such as high-rise building foundations, large-scale equipment foundations, water conservancy dams, etc.; mass concrete is often used in important parts such as building foundations and large-scale equipment foundations. Mass concrete cracks directly affect buildings, The stress of equipment affects the safety and durability of its structure and the performance of buildings and equipment. And once a crack occurs, it will be very troublesome to deal with and repeated. For the cracks generated after concealment, it will be very difficult to repair, causing unnecessary economic losses; these parts have high overall quality requirements, and the quality directly affects the safe use of the struct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D15/02E02D27/01E02D33/00C04B28/08C04B28/02C04B28/04
CPCE02D15/02E02D27/01E02D33/00C04B28/08C04B28/021C04B28/04E02D2250/0023E02D2300/002C04B14/06C04B18/08C04B2103/0068C04B2103/22
Inventor 张爱平
Owner CHINA NAT CHEM ENG NO 16 CONSTR
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