Concrete strutting piece and preparation technology thereof

Abstract

The invention relates to a concrete strutting piece and a preparation technology thereof, belonging to the technical field of construction strutting piece. The concrete strutting piece is characterized in that a strutting piece body is a cuboid, a reinforcement steel bar slot is formed in the top surface of the strutting piece body, the length (L) of the strutting piece body is adaptive to the thickness of a building wall body, and the strutting piece body comprises raw materials: cement, aggregate chips and water the mass ratio of which is 100:480-550:43-63; the aggregate chips with particle size D of no more than 0.1cm accounts for 30-40% of total amount of aggregate chips. According to the technology, a reinforcement steel bar slot is formed in the side surface, and demolding and maintenance are immediately conducted after pressing is conducted for 1-4s. The strutting piece is short in maintenance time, high in early strength, adaptive to concrete of buildings, convenient and fast in technological process, firm and difficult to loose, short in preparation period and fast to use.

Description

technical field [0001] A concrete support and its preparation process belong to the technical field of building supports. Background technique [0002] During the construction of a reinforced concrete building structure, it is necessary to bind the steel frame before pouring the concrete wall. During the tying process of the reinforcement frame of the side wall, it is necessary to add a cushion support between the formwork and the reinforcement to determine the thickness of the concrete member's protective layer and ensure the same depth of the reinforcement frame. Inconsistent specifications of supports will lead to exposed ribs. [0003] At present, the raw materials of concrete supports are mainly cement and sand, and some concrete supports use stone chips instead of part of sand as the raw materials of concrete supports. With the implementation of environmental protection policies, it is an inevitable trend that the use of river sand and sea sand will be replaced. It ...

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Problems solved by technology

However, the inventor has found in practice that there are many problems in the process of preparing concrete supports by using stone chips to completely replace sand: 1. The preparation period of concrete supports is long, and the maintenance time required after pressing is long. About 14 days; 2. The strength of the concrete support is low, and it is easy to cause damage or cracking during the laying and maintenance of steel bars. It is troublesome to replace the concrete support after the steel frame is tied; 3. The concrete support is only considered when laying 4. The concrete support and the concrete basic structure of the building have different expansion and contraction ratios, causing the concrete support to fall off and the contact surface to crack. Moisture in the air seeps into the surface of the steel bar from the gap, causing electrochemical corrosion of the steel bar, and the corroded steel bar will expand in volume, further destroying the concrete structure and shortening the service life of the building; 5. During the production process, the pressing process of the concrete support adopts front Pressing, that is, pressing down from the side where the reinforcement groove is set to form the reinforcement groove, because the fluidity gap of concrete between different batches or / and the pressure of different pressing tools are different, so that the bottom of the reinforcement groove of the concrete support and the concrete support The distance between the bottom surfaces of the body is not uniform, resulting in uneven reinforcement surfaces when laying reinforcement

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