Ecological water permeable brick applied to sponge city construction and preparation method thereof

A sponge city, permeable brick technology, applied in the application, paving with prefabricated blocks, construction, etc., can solve the problems of increasing the cost of permeable bricks, and achieve the effect of short preparation time, reducing tortuosity, and enhancing water permeability

Active Publication Date: 2021-09-03
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, in the manufacturing process of ecological permeable bricks, the finished nano-titanium dioxide is generally used directly, which will increase the cost of manufacturing permeable bricks

Method used

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  • Ecological water permeable brick applied to sponge city construction and preparation method thereof
  • Ecological water permeable brick applied to sponge city construction and preparation method thereof

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preparation example Construction

[0044] In one embodiment, a method for preparing an ecological permeable brick applied to sponge city construction provided by the present invention comprises the following steps:

[0045] 1) Prepare nano-titanium dioxide with titanium-containing blast furnace slag as raw material;

[0046] 2) Prepare the photocatalytic layer of ecological permeable bricks with cement, aeolian sand, diatomaceous earth, nano-titanium dioxide, etc.;

[0047] 3) The first water-permeable layer and the second water-permeable layer of ecological permeable bricks are respectively prepared from aeolian sand, combustible fuel, diatomite, etc.;

[0048] 4) The first water-permeable layer and the second water-permeable layer are pressed into a mould, and calcined to obtain a water-permeable brick matrix.

[0049] 5) Coating the prepared photocatalytic layer on the surface of the first permeable layer of the permeable brick base, pressing and molding under a certain pressure, and obtaining an ecological...

Embodiment 1

[0075] 1. Preparation of Nano-TiO2

[0076] 101) Sorting the titanium-containing blast furnace slag to remove impurities and pulverizing it;

[0077] 102) Calcinate the pulverized titanium-containing blast furnace slag with anhydrous sodium hydroxide at a ratio of 1:1.5 at 550° C. and 50 rpm for 1 hour. After cooling, the solid and liquid are separated, and the powder is washed with water;

[0078] 103) Mix the cleaned powder with hydrofluoric acid (mass percentage concentration of 40%) and hydrogen peroxide (mass percentage concentration of 30%) in deionized water at a molar ratio of 1:11 and 1:2 and then transfer to the reaction in the kettle

[0079] 104) Seal the reaction kettle, place the reaction kettle in an oven at 180° C. for 2-3 hours;

[0080] 105) Allow the reactor to cool down naturally, and then collect the solid material by centrifugation at a rotation speed of 6000r / min and a separation time of 2-3min.

[0081] 106) Washing the solid material, drying and gr...

Embodiment 2

[0097] 1. Preparation of Nano-TiO2

[0098] 101) Sorting the titanium-containing blast furnace slag to remove impurities and pulverizing it;

[0099] 102) Roast the pulverized titanium-containing blast furnace slag with anhydrous sodium hydroxide at a ratio of 1:1.5 at 500° C. and 60 rpm for 1.5 h. After cooling, the solid and liquid are separated, and the powder is washed with water;

[0100] 103) Mix the cleaned powder with hydrofluoric acid (mass percentage concentration of 40%) and hydrogen peroxide (mass percentage concentration of 30%) in deionized water at a molar ratio of 1:11 and 1:2 and then transfer to the reaction in the kettle

[0101] 104) Seal the reaction kettle, place the reaction kettle in an oven at 180° C. for 2 hours;

[0102] 105) Allow the reactor to cool down naturally, and then collect the solid material by centrifugation at a rotation speed of 6000r / min and a separation time of 3min.

[0103] 106) Washing the solid material, drying and grinding to...

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Abstract

The invention discloses an ecological water permeable brick applied to a sponge city and a preparation method thereof. The preparation method comprises the following steps: (1) preparing titanium dioxide by taking titanium-containing blast furnace slag as a raw material; (2) preparing an ecological water permeable brick photocatalytic layer by taking cement, aeolian sand, diatomite, nano titanium dioxide and the like as raw materials; (3) respectively preparing a first water permeable layer and a second water permeable layer of the ecological water permeable brick by taking aeolian sand, combustible fuel, diatomite, a 4% carboxymethyl cellulose solution and the like as raw materials; (4) carrying out compression molding on the first water permeable layer and the second water permeable layer in a mold at a certain pressure from top to bottom, and calcining to obtain a water permeable brick matrix; and (5) covering the surface of the first water permeable layer of the ecological water permeable brick with the photocatalytic layer, performing compression molding under a certain pressure, and performing maintenance to obtain the ecological water permeable brick. Self-made titanium dioxide is used, so that the manufacturing cost of the ecological water permeable brick is reduced. The photocatalytic layer of the ecological water permeable brick can effectively degrade pollutants in rainwater, and the three layers have certain porosity and can effectively permeate water.

Description

technical field [0001] The invention belongs to the technical field of sponge city, and specifically relates to an ecological permeable brick used in the construction of sponge city and a preparation method thereof. The permeable brick utilizes the structural characteristics of small upper voids and large lower voids, and focuses on the hydrophilicity and photocatalytic properties of nano-titanium dioxide. Improve the water permeability of permeable bricks and prolong their service life. Background technique [0002] In recent years, due to the severe urban waterlogging caused by heavy rains, the sponge city has become an important symbol of the transformation of urban development concepts and construction methods. An effective way to build a sponge city is to lay large areas of permeable bricks in areas such as urban roads, residential areas, park squares, and parking lots. Natural precipitation can be quickly absorbed by permeable bricks, and seep into the ground through ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C5/22E01C11/00C04B38/08C04B35/622C04B35/14C04B28/04
CPCE01C5/22E01C11/00C04B38/08C04B35/14C04B35/622C04B28/04C04B2235/602C04B2235/606C04B2235/656C04B2235/6562C04B2235/6567C04B2111/00827C04B38/068C04B14/305C04B14/068C04B18/26C04B22/16C04B2103/302
Inventor 孙昕孙云龙时晴晴
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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