Surface treatment method for clay brick recycled fine aggregate and cement-based water-permeable brick surface layer

A technology of recycled fine aggregate and surface treatment, which is applied in the field of building materials to achieve the effects of reduced water absorption, high compressive strength and increased water permeability

Inactive Publication Date: 2019-01-15
ZHENJIANG SOBUTE NEW MATERIAL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the commonly used recycled aggregate surface treatment methods are not suitable for clay brick recycled fine aggregate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A surface treatment method for clay brick regenerated fine aggregate: (1) Vacuum saturation treatment uses saturated calcium hydroxide solution to immerse 2.36-5.75mm regenerated fine aggregate in a closed container, then vacuumize to below 10 mbar, and keep for 48h; (2) Remove the solution, pour a mixture of stearic acid and water with a mass ratio of 1:20 to immerse the regenerated fine aggregate; (3) add hydrogen peroxide and alcohol as a composite catalyst, and the alcohol is ethanol with a mass ratio of 1:1 , propanol mixture, control the mass ratio of hydrogen peroxide and stearic acid to 1:5, and the mass ratio of alcohol to stearic acid to 1:20, and then evacuate to below 10 mbar for 2 hours; (4) Heating After reacting at 40-80°C for 3 hours, take out the regenerated fine aggregate, wash and dry it.

[0033] A surface treatment method of clay brick recycled fine aggregate and its application in cement-based permeable brick surface layer, the cement-based permeab...

Embodiment 2

[0035] A method for surface treatment of recycled fine aggregate of clay bricks: (1) Vacuum water saturation treatment uses saturated calcium chloride solution to immerse 1.18-2.36 mm recycled fine aggregate in a closed container, then vacuumize to below 10 mbar, and keep for 48 hours; (2) Pump out the solution, pour a mixture of ammonium stearate and water with a mass ratio of 1:5 to immerse the regenerated fine aggregate, and then evacuate to below 10 mbar for 2 hours; (3) Heat to 40~ After reacting at 80°C for 1 hour, the regenerated fine aggregate was taken out, washed and dried.

[0036] A surface treatment method of clay brick regenerated fine aggregate and its application in cement-based permeable brick surface layer, the cement-based permeable brick surface layer is composed of the following weight percentage: P·II 52.5 cement 400 parts, with 1500 parts of 1.18-2.36 mm clay brick aggregate processed by the above method, 100 parts of water, and 8 parts of polycarboxylat...

Embodiment 3

[0038] A surface treatment method for clay brick regenerated fine aggregate: (1) Vacuum saturation treatment uses saturated calcium nitrate solution to immerse 0.6-1.18 mm regenerated fine aggregate in a closed container, then vacuumize to below 10 mbar, and keep for 48 hours; ( 2) Remove the solution, pour a mixture of sodium stearate and water with a mass ratio of 1:10 to immerse the regenerated fine aggregate, and evacuate again to below 10 mbar for 2 hours; (3) Heat to 40~80 After reacting at ℃ for 2 hours, take out the regenerated fine aggregate, wash and dry it.

[0039] A surface treatment method of clay brick regenerated fine aggregate and its application in the permeable brick surface layer, the permeable brick surface layer is composed of the following weight percentage: P·II 52.5 cement 450 parts, treated with the above method 0.6-1.18mm clay brick aggregate 1600 parts, water 120 parts, polycarboxylate high performance water reducer 10 parts.

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Abstract

The invention especially relates to a surface treatment method for clay brick recycled fine aggregate and a cement-based water-permeable brick surface layer, belonging to the field of building materials. The surface treatment method comprises the following steps: vacuum saturation treatment of recycled fine aggregate; a mixing reaction; and washing and drying. According to the method, vacuum saturation treatment is implemented by immersing the recycled fine aggregate in a closed container with a calcium ion solution and then performing vacuumization until a pressure is 10 mbar or below; then the solution is removed through pumping, a catalyst and a mixture of stearic acid / stearate and water are poured, vacuumization is performed again until a pressure is 10 mbar or below, and the pressureis maintained for 2 h; and a temperature is raised to 40-80 DEG C for 1-3 h, then a reaction is performed for 1 to 3 h, and the recycled fine aggregate is taken out for washing and drying. The methodallows a calcium stearate hydrophobic layer to be generated on the surface of the porous recycled fine aggregate and in the pores of the porous recycled fine aggregate in situ through a simple process, so the water absorption rate of the recycled fine aggregate is significantly reduced, and the mechanical performance, water permeability and durability of a recycled cement-based water-permeable brick surface layer material are effectively improved.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a surface treatment method for clay brick regenerated fine aggregate and a cement-based permeable brick surface layer. Background technique [0002] Compared with developed countries, there is a large gap in the comprehensive utilization of construction waste resources in my country. my country's construction waste resource recycling is still in the exploratory stage, and the construction waste recycling rate is only 5%. Traditional construction waste disposal methods such as stacking in the open air or landfill not only increase dust and pollute the environment, but also occupy a large amount of land resources and affect soil vegetation. According to preliminary investigations, the demolished old urban buildings in my country are mainly brick-concrete structures, and 70% to 80% of construction solid waste is discarded clay bricks. If not properly disposed of, it wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B20/02C04B18/16C04B28/04C04B38/00
CPCC04B18/16C04B20/023C04B28/04C04B38/0041C04B2111/00284C04B2201/50C04B22/002C04B24/24Y02W30/91
Inventor 姜骞刘建忠周华新石亮崔巩
Owner ZHENJIANG SOBUTE NEW MATERIAL CO LTD
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