Roadbed filling material and preparation method thereof

A roadbed filling material and stew material technology, applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problems of surrounding environmental pollution, road surface damage, insufficient strength characteristics, etc., to reduce production costs, Improve waterproof performance and optimize geotechnical performance

Active Publication Date: 2022-05-06
武汉三源特种建材有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A large amount of industrial by-product gypsum is piled up, which not only occupies land, but also wastes sulfur and calcium resources, and the acid and other harmful substances contained in it are likely to pollute the surrounding environment
At present, there have been researches on the application of phosphogypsum in road construction, but the direct use of phosphogypsum in roadbed materials has the following problems: Phosphogypsum is greatly affected by water, and when the water content is high, phosphogypsum will become soft and cause a decrease in strength , resulting in subsidence of the roadbed and damage to the road surface; when the water content is low, shrinkage cracks will occur, which will also lead to damage to the road surface; its geotechnical performance is poor, and the water stability is insufficient; on the other hand, it is the water pollution problem of phosphogypsum
However, due to the large number of clay components and insufficient strength characteristics, it is difficult to directly apply to engineering applications.

Method used

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  • Roadbed filling material and preparation method thereof
  • Roadbed filling material and preparation method thereof
  • Roadbed filling material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0040] The present embodiment provides a kind of roadbed filling material, comprises soil sample component and cementitious component, and wherein soil sample component comprises each component of following mass percentage: Copper tailings sand 40%, phosphogypsum 60%; Divided into cement, the mass is 10% of the total mass of copper tailings sand and phosphogypsum;

[0041] The preparation method of the roadbed filling material of the present embodiment may further comprise the steps:

[0042] S1. Weigh copper tailings sand and phosphogypsum in proportion, mix them with water with 20% of the total mass of copper tailings sand and phosphogypsum, and stew the materials for 24 hours to obtain soil sample components;

[0043] S2. Weigh 10% cement of the total mass of copper tailings sand and phosphogypsum, add it to the soil sample component obtained in step S1, mix evenly, and stew the material for 20 minutes to obtain the roadbed filling material.

Embodiment 2

[0045] The difference between Example 2 and Example 1 is that the soil sample components in this example include the following components in mass percentage: copper tailings sand 60%, phosphogypsum 40%.

Embodiment 3

[0047] The difference between Example 3 and Example 1 is that the soil sample components in this example include the following components in mass percentage: 80% of copper tailings sand and 20% of phosphogypsum.

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Abstract

The invention discloses a roadbed filling material and a preparation method thereof, and belongs to the technical field of roadbed engineering, the roadbed filling material comprises a soil sample component and a gelling component, the soil sample component comprises the following components in percentage by mass: 40-80% of copper tailing sand and 20-60% of phosphogypsum, and the mass of the gelling component is 2-15% of the mass of the soil sample component; according to the invention, the complementary chemical characteristic between the industrial waste copper tailing sand and the ardealite is utilized, the industrial ardealite is weakly acidic, the copper tailing sand is weakly alkaline, and the surface properties of the ardealite and copper tailing sand particles are changed through an acid-base neutralization reaction, so that the soil engineering performance of the ardealite and copper tailing sand particles is optimized. The copper tailings are applied to road construction on a large scale, so that industrial solid wastes are reasonably utilized, and the production cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of roadbed engineering, and in particular relates to a roadbed filling material and a preparation method thereof. Background technique [0002] my country is a big country in phosphorus chemical industry. For a long time, industrial by-product gypsum, especially phosphogypsum, has been a persistent problem affecting industrial production. A large amount of industrial by-product gypsum is piled up, which not only occupies land, but also wastes sulfur and calcium resources, and the acid and other harmful substances contained in it are likely to pollute the surrounding environment. At present, there have been researches on the application of phosphogypsum in road construction, but the direct use of phosphogypsum in roadbed materials has the following problems: Phosphogypsum is greatly affected by water, and when the water content is high, phosphogypsum will become soft and cause a decrease in strength , result...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): C04B28/00C04B18/12C04B22/14C04B111/27
CPCC04B28/00C04B18/12C04B22/144C04B2111/00017C04B2111/0075C04B2111/27C04B2201/20C04B2201/50Y02W30/91
Inventor从金瑶涂博杨恒祁庆龙彭佳志
Owner武汉三源特种建材有限责任公司