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A kind of preparation method of ecological high permeable concrete

A permeable concrete and ecological technology, applied in the field of waste resource utilization, can solve the problems of increasing crushing energy consumption, increasing concrete production cost, large porosity of steel slag, etc., so as to improve weather resistance, realize resource utilization, and reduce environmental pollution. The effect of pollution

Active Publication Date: 2020-01-03
SHOUGANG SHUICHENG IRON & STEEL GRP SAIDE CONSTR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Steel slag has large porosity and high hardness. If it is used in high-strength concrete, it must be crushed, which will increase the energy consumption of crushing and increase the production cost of concrete.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] (1) 47.3kg liquid bisphenol A type epoxy resin 6101, 4.8kg hydrogenated liquid bisphenol A type epoxy resin, 19.2kg liquid polyamide curing agent, 1.0kg silane coupling agent KH-570, 8.4kg polyamide Vinyl alcohol emulsion and 19.3kg ethylene glycol diglycidyl ether are stirred evenly to obtain epoxy resin adhesive;

[0015] (2) fully stir the epoxy resin adhesive obtained in step 1 and 12000kg particle diameter of 5 to 15mm steel slag, so that the epoxy resin adhesive can completely coat the steel slag to obtain the modified steel slag particles;

[0016] (3) Pour 500kg of P.O42.5 cement into the modified steel slag particles obtained in step 2, add 160kg of tap water after fully stirring, continue fully stirring, and finally obtain permeable concrete.

[0017] The prepared permeable concrete has a porosity of 36.1%, a 28d compressive strength of 31.2MPa, and a water permeability coefficient of 44.2mm / s.

Embodiment 2

[0019] (1) 44.6kg liquid bisphenol A type epoxy resin 616, 8.2kg hydrogenated liquid bisphenol A type epoxy resin, 22.5kg liquid polyamide curing agent, 1.3kg silane coupling agent KH-550, 6.7kg polyamide Vinyl alcohol emulsion and 16.7kg ethylene glycol diglycidyl ether are stirred evenly to obtain epoxy resin adhesive;

[0020] (2) fully stir the epoxy resin adhesive obtained in step 1 and 25000kg particle diameter of 5 to 15mm steel slag, so that the epoxy resin adhesive can completely coat the steel slag to obtain the modified steel slag particles;

[0021] (3) Pour 1200kg of P.O42.5 cement into the modified steel slag particles obtained in step 2, add 420kg of tap water after fully stirring, continue fully stirring, and finally obtain permeable concrete.

[0022] The prepared permeable concrete has a porosity of 38.7%, a 28d compressive strength of 33.2MPa, and a water permeability coefficient of 42.6mm / s.

Embodiment 3

[0024] (1) 36.5kg liquid bisphenol A type epoxy resin 618, 10.9kg hydrogenated liquid bisphenol A type epoxy resin, 20.1kg liquid polyamide curing agent, 2.2kg silane coupling agent KH-570, 12.5kg polyamide Vinyl alcohol emulsion and 17.8kg ethylene glycol diglycidyl ether are stirred evenly to obtain epoxy resin adhesive;

[0025] (2) fully stir the epoxy resin adhesive obtained in step 1 and 20000kg particle diameter of 5 to 15mm steel slag, so that the epoxy resin adhesive can completely coat the steel slag to obtain the modified steel slag particles;

[0026] (3) Pour 1000kg P.O42.5 cement into the modified steel slag particles obtained in step 2, add 340kg tap water after fully stirring, continue fully stirring, and finally obtain permeable concrete.

[0027] The prepared permeable concrete has a porosity of 35.2%, a 28d compressive strength of 35.8MPa, and a water permeability coefficient of 43.7mm / s.

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Abstract

The invention discloses a preparation method of ecological high-permeable concrete. The preparation method comprises the following steps: firstly, coating steel slag with an epoxy resin adhesive; then, mixing cement with the steel slag coated with the epoxy resin adhesive; finally, adding water and performing stirring to obtain the high-permeable concrete. The preparation method has the followingbeneficial effects: (1) all aggregate adopts the steel slag, recycling of the steel slag is realized, and environmental pollution caused by the steel slag accumulated outdoors is reduced; (2) when concrete is prepared, the steel slag is coated with the epoxy resin adhesive firstly, so that harmful elements in the steel slag can be prevented from seeping out and harming the environment; (3) prepared concrete has porosity of 35% or higher, 28d compressive strength reaching 31 MPa or higher and permeability coefficient reaching 42 mm / s or higher; (4) hydrogenated bisphenol A epoxy resin is addedto concrete and can improve weather resistance of concrete; (5) the steel slag does not need special treatment during use.

Description

technical field [0001] The invention relates to the technical field of resource utilization of waste, in particular to a method for preparing ecological high-permeable concrete by using steel slag as a raw material. Background technique [0002] Steel slag is the solid waste discharged by iron and steel enterprises during the steelmaking process. It is the largest solid by-product in the iron and steel industry, and its discharge is about 12% to 15% of the crude steel output. In 2016 alone, the discharge of steel slag in my country reached more than 100 million tons. In 2015, the cumulative stockpiling of steel slag in the country reached more than 1 billion tons. Since the steel slag is piled up outdoors, the chromium, cadmium, arsenic and other harmful elements contained in the steel slag will enter the soil after being washed by rainwater and seriously pollute the environment. At the same time, the flying slag dust also seriously pollutes the atmosphere. Although my coun...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B38/00C04B20/10C04B18/14
CPCC04B20/1037C04B28/04C04B2111/00284C04B2201/50C04B18/142C04B38/0041C04B38/0074Y02W30/91
Inventor 高昭宗蔡菲喻荣玲张大忠王玉
Owner SHOUGANG SHUICHENG IRON & STEEL GRP SAIDE CONSTR CO LTD