A durable steel slag concrete and its preparation process

A steel slag concrete and durability technology, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the problems of short service life of pavement and poor carbonization resistance of steel slag concrete, and achieve the effect of improving durability

Active Publication Date: 2022-03-08
河北浩远天宸环保科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the use of steel slag instead of aggregate is an effective way to improve the utilization rate of steel slag. The concrete produced with steel slag as raw material is mainly used for road surface repair. Carbon dioxide undergoes a carbonation reaction. Due to the poor carbonation resistance of steel slag concrete, there is a defect that the service life of the pavement paved with steel slag concrete is short

Method used

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  • A durable steel slag concrete and its preparation process
  • A durable steel slag concrete and its preparation process
  • A durable steel slag concrete and its preparation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A durable steel slag concrete, comprising the following raw materials in parts by mass obtained by stirring and mixing:

[0045] 210 parts of cement,

[0046] 255 parts of steel slag,

[0047] 150 parts of water,

[0048] 55 parts of fly ash,

[0049] 22 parts of nylon 66, wherein nylon 66 is modified nylon 66, and the particle size of modified nylon 66 is 250 μm.

[0050] The amine chain extender is preferably 4 parts of amino-terminated trimethylolpropane tripropylene glycol ether,

[0051] The dispersant is preferably 15 parts of sodium hexametaphosphate,

[0052] The toughening agent is preferably 13 parts of chlorinated polyethylene,

[0053] The preparation of modified nylon 66 comprises the following steps:

[0054] S1: Nylon 66 and amino-terminated trimethylolpropane tripropylene glycol ether were mixed at high speed for 30 minutes to obtain a premix;

[0055] S2: Add the pre-mixture to a twin-screw extruder for melt reaction and extrusion, and the extrus...

Embodiment 6

[0080] A durable steel slag concrete, based on Example 1, N,N-bis(2-hydroxypropyl)aniline is selected as the amine chain extender, and the rest of the operation steps and parameters are the same as in Example 1.

Embodiment 7

[0082] A kind of durable steel slag concrete, based on the basis of Example 1, the amine chain extender is selected from 3,3'-dichloro-4,4-diamino-diphenylmethane, and the rest of the operation steps and parameters are the same as those in the implementation Example 1 is the same.

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Abstract

This application relates to the field of concrete pavement construction, and specifically discloses a durable steel slag concrete and its preparation process. The steel slag concrete includes the following raw materials in parts by mass and is obtained by stirring and mixing: 200-220 parts of cement, 250-260 parts of steel slag, water 120-180 parts, 50-60 parts of fly ash, 18-25 parts of nylon 66, the particle size of the nylon 66 is 200-300 μm, the preparation method of steel slag concrete is, the concrete raw material nylon 66, cement, water, steel slag, etc. The steel slag concrete is finally obtained by stirring and mixing, and the steel slag concrete composition of the present application can be used for laying road surfaces, and the present application has the advantage of improving the durability of the steel slag concrete.

Description

technical field [0001] The application relates to the field of concrete pavement construction, more specifically, it relates to a durable steel slag concrete and its preparation process. Background technique [0002] Steel slag is the waste slag discharged during the steelmaking process. It is mainly composed of slag-forming materials, smelting reactants, eroded and fallen furnace body, furnace repair materials, impurities brought in by metal charge and slag-forming materials added to adjust the properties of steel slag. solid solution, the amount of steel slag shelved in China has reached 1.8×10 7 tons, and is still growing at a rate of several million tons per year. Steel slag is a solid waste produced in the steelmaking industry. It is characterized by large output and very low utilization rate. At present, the main disposal method is site stacking, which occupies a large amount of land. With the vigorous development of the steel industry, the discharge of steel slag In...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00C04B20/02C04B18/14C04B16/06C04B111/20
CPCC04B28/00C04B16/0691C04B20/023C04B18/142C04B2111/20C04B18/08C04B24/32C04B2103/408C04B24/2682Y02W30/91
Inventor 高增民
Owner 河北浩远天宸环保科技股份有限公司
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