High tensile permeable concrete sandwich structure and preparation method

A permeable concrete and sandwich technology, applied in the field of building materials, can solve the problems of complex construction process, low tensile strength, easy corrosion of steel bars, etc., and achieve the effect of expanding the scope of application, good tensile strength, and ensuring tensile strength.

Active Publication Date: 2020-07-10
WUHAN UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

[0003] The porous structure of pervious concrete brings many advantages, but also has some disadvantages: low tensile strength and poor crack resistance
For example, a permeable reinforced concrete disclosed in Chinese invention patent (publication number CN104446076A) combines permeable concrete with anti-corrosion steel bars, but because permeable concrete is different from conventional concrete, the steel bars in permeable concrete are prone to corrosion under long-term frequent water circulation. Therefore, the permeable reinforced concrete needs to be tightly covered and wrapped with anti-corrosion steel bars, and the construction process is complicated

Method used

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  • High tensile permeable concrete sandwich structure and preparation method
  • High tensile permeable concrete sandwich structure and preparation method

Examples

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Embodiment 1

[0051] In this embodiment, the fiber material is basalt fiber.

[0052] This embodiment provides a high tensile permeable concrete sandwich beam structure, see figure 1 As shown, the beam structure includes the lower permeable concrete 1, the upper permeable concrete 2, the geogrid reinforcement layer 3, the bonding layer 5, and the basalt fibers 4 evenly distributed in the lower permeable concrete 1 and the upper permeable concrete 2. Geogrid reinforcement layer 3 is tiled at the bottom of the distance beam where h represents beam height. The bonding layer 5 selects room temperature curable epoxy resin glue, and evenly coats the upper and lower surfaces of the geogrid reinforcement layer 3 .

[0053] In this embodiment, the lower permeable concrete 1 and the upper permeable concrete 2 are prepared by using pervious concrete, and the pervious concrete is prepared by mixing cement, fly ash, coarse aggregate, water and a water reducer. Among them, ordinary portland cement wi...

Embodiment 2

[0070] This embodiment is used to provide comparative experiments and experimental data.

[0071] Fabrication of permeable concrete beam structures U, R 0 , R 1 and high tensile permeable concrete sandwich beam structure R 2 , R 3 . The beam structure U has no geogrid reinforcement layer, bonding layer and basalt fiber, and is only the main body of the permeable concrete structure. Beam structure R 0 There is no geogrid reinforcement layer and bonding layer, and only basalt fibers are evenly distributed in the main body of the pervious concrete structure. Beam structure R 1 In the main body of the permeable concrete structure, a geogrid reinforcement layer is flatly laid, and basalt fibers are evenly distributed, but the upper and lower surfaces of the geogrid reinforcement layer are not coated with a bonding layer. Beam structure R 2 and R 3 Manufactured by the method of Example 1, the geogrid reinforcement layer is tiled in the main body of the permeable concrete st...

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Abstract

The invention discloses a high-tensile-strength pervious concrete sandwich structure and a preparation method thereof. The high-tensile-strength pervious concrete sandwich structure comprises a pervious concrete structure main body, a geogrid reinforced layer and bonding layers, wherein one geogrid reinforced layer or a plurality of geogrid reinforced layers arranged at intervals are laid in a tensile area in the pervious concrete structure main body; the upper and lower surfaces of each geogrid reinforced layer are coated with the bonding layers; a fibrous material is distributed in the pervious concrete structure main body; and the grid gaps of each geogrid reinforced layer are filled with pervious concrete in which the fibrous material is distributed. According to the invention, the tensile strength of the pervious concrete sandwich structure is improved through combined action of the geogrid reinforced layer, the bonding layers, the fibrous material and the pervious concrete; in addition, the pervious concrete sandwich structure of the invention is simple and flexible in construction and cost-effective, and is of great significance to expansion of the application range of the pervious concrete and promotion of the construction of sponge cities in China.

Description

technical field [0001] The invention relates to the field of building materials for building a smart sponge city, in particular to a sandwich structure of high-tensile permeable concrete and a preparation method thereof. Background technique [0002] Permeable concrete is an ecological concrete made by mixing specific graded cement, coarse aggregate, admixtures, and admixtures in a certain proportion. The existence of continuous pores in permeable concrete can effectively solve urban water accumulation and structural water damage, and promote urban and natural water circulation. Its heat absorption and heat storage effect is remarkable, which can effectively alleviate the urban heat island effect. The porous structure can also absorb sound and reduce noise, reducing urban noise pollution. The presence of large pores also makes the freeze-thaw resistance of pervious concrete higher than that of ordinary concrete. With the continuous advancement of my country's sponge city ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01C5/06E01C5/08E01C11/22B28B23/02B28C5/40C04B28/04
CPCB28B23/02B28C5/402C04B28/04C04B2201/50E01C5/065E01C5/08E01C11/225C04B18/08C04B14/02C04B2103/302C04B14/4643
Inventor 姜清辉池寅孟晓宇张云天刘乳燕
Owner WUHAN UNIV
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