A kind of prestressed anode prefabricated plate and its mold and processing method

A processing method and prestressing technology, applied in the field of prestressed anode prefabricated plate and its processing, can solve the problems of structural damage, easy aging, poor high temperature resistance of resin glue, etc., to improve service life and durability, consistency and stability. Good uniformity and the effect of improving mechanical properties

Active Publication Date: 2019-04-30
SHENZHEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method only starts from the perspective of improving the durability of concrete, but ignores the protection of steel bars. During the long-term service process, due to the comprehensive effect of the environment, steel bars will corrode to varying degrees, reducing the mechanical properties of reinforced concrete structures. On the other hand, problems such as poor high temperature resistance and easy aging of resin glue are also exposed in the process of strengthening concrete
This reinforcement method cannot play a good role in long-term protection of reinforced concrete structures.
[0004] The reinforced concrete structure is a composite of concrete and steel bars. Its corrosion forms can be divided into two types: one is the lack of durability of the concrete, which itself is destroyed, and the entire structure is damaged due to the exposure and corrosion of the steel bars; The second is that the concrete itself is not corroded, but due to the action of the external medium, the chemical properties of the concrete itself change or the ions that can stimulate the corrosion of the steel bar are introduced, so that the passivation effect on the surface of the steel bar is lost, causing the corrosion of the steel bar

Method used

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  • A kind of prestressed anode prefabricated plate and its mold and processing method
  • A kind of prestressed anode prefabricated plate and its mold and processing method
  • A kind of prestressed anode prefabricated plate and its mold and processing method

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preparation example Construction

[0048] In the present invention, there is no special limitation on the preparation method of the alkali-activated inorganic glue, and the method for preparing the composition well-known to those skilled in the art can be used. The preparation of the alkali-activated inorganic glue preferably comprises the following steps:

[0049] (1) mixing reinforcing filler, activator, dispersant and water to obtain mixed slurry;

[0050] (2) Mix the mixed slurry obtained in the step (1) with a gelling material, an expansion agent filler, an inorganic modified filler, a defoamer and a retarder to obtain an alkali-activated inorganic glue.

[0051] In the present invention, the reinforcing filler, activator, dispersant and water are preferably mixed to obtain a mixed slurry. In the present invention, there is no special limitation on the mixing operation of the reinforcing filler, activator, dispersant and water, and the technical solution for preparing the mixed slurry well known to those ...

Embodiment 1

[0057] Raw materials: 300g mineral powder (selected from Shaogang mineral powder), 180g activator potassium silicate (modulus 2.4) (the potassium silicate container should be shaken upside down before taking it out to prevent the bottom from settling and affecting the quality of the activator) , rubber powder 4g, gypsum 4g, light-burned magnesium oxide 15g, polyvinyl alcohol fiber 3g, dispersant (polyethylene glycol) 3g, retarder (zinc sulfate) 3g, defoamer (organic silicon defoamer) 9g .

[0058] Mix the polyvinyl alcohol fiber and dispersant into the water glass and stir (249r / min) to disperse the polyvinyl alcohol fiber evenly to obtain a mixed slurry; first put the mineral powder, rubber powder, gypsum and light-burned magnesium oxide into the stirring pot Stir at a low speed (150r / min) and control the time for 2 minutes to obtain the dry material; mix the mixed slurry, dry material and its defoamer and retarder, and manually stir for 2 minutes until the raw materials are ...

Embodiment 2

[0061] Raw material: 300g mineral powder (selected from Shaogang mineral powder), 220g activator sodium water glass (modulus 2.0) (shake the sodium water glass container upside down before taking it out to prevent the bottom from settling and affecting the quality of the activator) , rubber powder 3g, gypsum 3g, light-burned magnesium oxide 15g, ultra-high molecular fiber 3g, dispersant (polyethylene glycol) 3g, retarder (zinc sulfate) 3g, defoamer (organic silicon defoamer) 9g .

[0062] Mix polyvinyl alcohol fiber and dispersant into water glass and stir (249-284r / min) to disperse polyvinyl alcohol fiber evenly to obtain mixed slurry; put mineral powder, rubber powder, gypsum and light-burned magnesium oxide into the stirring pot Stir at medium and low speed (150r / min) and control the time for 2 minutes to obtain dry material; mix the mixed slurry, dry material, defoamer and retarder, and manually stir for 2 minutes until the raw materials are evenly wet, then control the mi...

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Abstract

The invention discloses a prestressed anode prefabricated plate, a mould thereof and a processing method and relates to the technical field of reinforced concrete structure reinforcing. The prestressed anode prefabricated plate comprises an upper glue layer, a prestressed carbon fiber cloth and a lower glue layer. The prestressed carbon fiber cloth is arranged between the upper glue layer and the lower glue layer, and the upper glue layer and the lower glue layer are made of alkali-activated inorganic glue. The prestressed anode prefabricated plate covers a reinforced concrete structure. Mechanical performance of the reinforced concrete structure is improved, and the prestressed anode prefabricated plate can serve as an auxiliary anode applying impressed current cathodic protection to steel bars. The steel bars are protected from being affected by the corrosion effect of ions capable of activating corrosion of the steel bars, so that the service life of the steel bars is prolonged, and the durability of the steel bars is improved. Compared with a traditional gluing technology, construction consistency is better.

Description

technical field [0001] The invention relates to the technical field of reinforcing reinforced concrete structures, in particular to a prestressed anode prefabricated plate and a processing method thereof. Background technique [0002] Reinforced concrete structure is the most important structural form in civil engineering, and its safety is closely related to the healthy development of the national economy. However, with the increase of the service life and the change of the service environment, the deterioration and functional failure of reinforced concrete structures are more common and serious. [0003] In recent years, a new technology of using fiber-reinforced plastics to repair, reinforce and renovate steel, concrete or other components or structures has gradually emerged, which has been highly valued in China and has been widely used and developed. Among them, the sheet mainly reinforced by carbon fiber has been used in the United States, Japan and Europe as a concre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04C2/26E04C2/04B28B7/00B28B23/04C04B28/00C23F13/16
CPCB28B7/0002B28B7/0014B28B7/0029B28B23/04C04B28/006C23F13/16C23F2201/02C23F2213/20E04C2/044E04C2/26C04B22/08C04B24/24C04B22/143C04B22/066C04B16/0641C04B2103/408C04B2103/22C04B2103/50C04B16/06C04B18/24
Inventor 方媛邢锋朱继华
Owner SHENZHEN UNIV
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