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Water permeating and water holding material and preparation method thereof

A technology for water-retaining materials and aggregates, applied in the field of building materials, can solve the problems affecting the performance of water-permeable and water-retaining materials, and achieve the effects of high strength, not easy to block holes, and high strength

Active Publication Date: 2018-05-04
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a water-permeable and water-retaining material and its preparation method, which solves the problem of using Portland cement as a binder and the need to use aggregates with larger particle sizes, which in turn affects water permeability. Problems with the performance of water-retaining materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Binding agent is magnesium phosphate cement powder in the present embodiment, and aggregate is quartz sand, and preparation method comprises the following steps:

[0027] Stir 130g of magnesium phosphate cement powder and 455g of quartz sand with a particle size within the range of 0.50-3.00mm (the mass ratio of magnesium phosphate cement to aggregate is 1:3.5), then add 20.8g of water and stir evenly (water-solid Ratio of 0.0356), so that the surface of the aggregate is uniformly coated with a layer of magnesium phosphate cement slurry to make a non-fluid mixture; the mixture is placed in the mold and scraped, and it can be formed by normal manual compaction. The test piece was taken out and maintained at 25°C for 3 hours to obtain a water-permeable and water-retaining material.

Embodiment 2

[0029] Binding agent is magnesium phosphate cement powder in the present embodiment, and aggregate is quartz sand, and preparation method comprises the following steps:

[0030] Stir 130g of magnesium phosphate cement powder and 195g of quartz sand with a particle size within the range of 0.2-0.35mm (the mass ratio of magnesium phosphate cement to aggregate is 1:1.5), then add 32.5g of water and stir evenly (water-solid Ratio of 0.1), so that the surface of the aggregate is evenly coated with a layer of magnesium phosphate cement slurry to make a non-fluid mixture; the mixture is placed in a mold and pressed under a pressure of 20MPa, and the holding time is 20s , take out the test piece and maintain it at 20°C for 3 hours to obtain a water-permeable and water-retaining material.

Embodiment 3

[0032] Binding agent is magnesium phosphate cement powder in the present embodiment, and aggregate is quartz sand, and preparation method comprises the following steps:

[0033] Stir 130g of magnesium phosphate cement powder and 455g of quartz sand with a particle size within the range of 0.50-3.00mm (the mass ratio of magnesium phosphate cement to aggregate is 1:3.5), then add 20.8g of water and stir evenly (water-solid Ratio of 0.0356), so that the surface of the aggregate is uniformly coated with a layer of magnesium phosphate cement slurry to make a non-fluid mixture; the mixture is placed in a mold, and pressed with a press under a pressure of 7.5MPa. The pressure holding time was 20s, and the test block was taken out and maintained at 30°C for 3 hours to obtain a water-permeable and water-retaining material.

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Abstract

The invention discloses a water permeating and water holding material and a preparation method thereof. The water permeating and water holding material is characterized in that magnesium phosphate cement is used as an adhesive, wherein the mass ratio of the magnesium phosphate cement to aggregate is 1:(1.5-5); the particle size of the aggregate is 0.2-5 mm. The preparation method comprises the following steps: mixing the magnesium phosphate cement and the aggregate; adding water; uniformly stirring to obtain a mixture; and horizontally paving the mixture on a pavement, and molding; or performing compression molding on the mixture to obtain the water permeating and water holding material. According to the water permeating and water holding material, the magnesium phosphate cement is appliedto the preparation of the water permeating and water holding material, so that the water permeating material is high in water permeating performance, high in water holding performance, and high in pressure resistance.

Description

technical field [0001] The invention belongs to the field of building materials, in particular to a water-permeable and water-retaining material and a preparation method thereof. Background technique [0002] Sponge city refers to the city adapting to surroundings It has good "elasticity" in terms of changing and responding to natural disasters caused by rainwater, and it can also be called "water elastic city". release" and use it. Water-retaining and permeable pavement materials have small pore or gap sizes, and can effectively complete the process of water absorption, water storage, water seepage, and water purification by using their microporous characteristics, and the stored water can effectively adjust the environmental humidity. Vigorously paving water-retaining and permeable pavement materials has a significant effect on promoting the construction of sponge cities and solving problems such as the "heat island effect" and dust pollution caused by closed pavements. ...

Claims

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Application Information

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IPC IPC(8): C04B28/34C04B38/00
CPCC04B28/344C04B2111/00284C04B2111/0075C04B14/06C04B38/0041
Inventor 钱觉时李振唐江昱岳燕飞秦继辉刘从振
Owner CHONGQING UNIV