Novel tailing mixed soil road base course material and preparation method thereof

A technology of road base and mixed soil, which is applied in the field of road base materials and industrial solid waste treatment. It can solve the problems that road construction cannot be applied on a large scale, the chemical properties of iron tailings are inactive, and the adsorption force of particles is small, so as to achieve easy compaction and stability, solve the poor performance index, improve the effect of adsorption force

Active Publication Date: 2020-04-14
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0015] Based on the above literature, it can be found that although the research on the application of iron tailings to roads has achieved certain results, it cannot be applied on a large scale due to the inactivity of the iron tailings itself, the small adsorption force between particles, and the low overall strength. road construction

Method used

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  • Novel tailing mixed soil road base course material and preparation method thereof
  • Novel tailing mixed soil road base course material and preparation method thereof
  • Novel tailing mixed soil road base course material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0053] A new tailings mixed soil road base material, including the following raw materials in parts by mass, 50 parts of iron tailings sand, 50 parts of ordinary soil, 5 parts of cement, 5 parts of lime and 2 parts of ionic soil stabilizer, without polypropylene fiber , its preparation method comprises the following steps:

[0054] (1) After mixing the iron tailings sand, soil, cement and ionic soil curing agent, carry out a compaction test, and measure its optimum moisture content and optimum dry density;

[0055] (2) taking various raw materials according to the required proportioning, mixing the iron tailings sand, soil and lime evenly to obtain a mixture;

[0056] (3) According to the measured optimum water content, add tap water to the ionic soil stabilizer to prepare a dilution, wherein the total amount of water added should be about 1%-2% greater than the optimum water content.

[0057] (4) Add 70% of the diluent to the mixture, stir well, cover the mixture with a plas...

Embodiment 2

[0072] Example 2 Compared with Example 1, the raw materials, dosage and preparation steps for preparing tailings mixed soil are the same as Example 1. The difference is that the tailings mixed soil prepared in Example 2 was subjected to unconfined compression tests of different ages (7 days, 14 days, 28 days, 60 days, 90 days).

[0073] The specific operation is: divide the tailings mixed soil prepared in Example 2 into five groups according to different ages (7 days, 14 days, 28 days, 60 days, 90 days), and make 6 test pieces for each group and put them into standard curing Box (curing temperature 20±2°C, humidity 95%), after curing for 6 days, 13 days, 27 days, 59 days, 89 days, soak in water for 1 day, dry the surface moisture of the test block, according to the "Highway Engineering Inorganic Binder Stable Material Unconfined compressive strength test.

Embodiment 3

[0087] The tailings mixed soil prepared in Example 1 was subjected to indirect tensile tests (split tests) at different ages (7 days, 14 days, 28 days, 60 days, 90 days), and Example 3 was obtained. The specific operation is: use the reaction force frame and demoulding machine to make 30 test pieces (6 for each age) and put them into the standard curing box (curing temperature 20±2°C, humidity 95%), and curing for 6 days and 13 days respectively , 27 days, 59 days, and 89 days, soak in water for 1 day, wipe off the surface moisture of the test block, and conduct an indirect tensile test (split test) according to the "Test Regulations for Highway Engineering Inorganic Binder Stable Materials".

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Abstract

The invention provides a novel tailing mixed soil road base course material and a preparation method thereof, and relates to the technical field of road base course materials and industrial solid waste treatment, wherein the base course material comprises the following components in parts by mass: 40-60 parts of common soil, 40-60 parts of iron tailing sand, 1-5 parts of cement, 1-5 parts of lime,1-3 parts of an ionic soil curing agent, 0-0.5 part of polyethylene fibers and 8-16 parts of tap water. According to the invention, the novel tailing mixed soil road base course material is preparedby combining the soil solidification and the mixing gelation of lime, cement and polypropylene fibers through mutual excitation and cooperation of the materials, so that the base course material having high iron tailing sand utilization rate and meeting the normative performance requirement is provided.

Description

technical field [0001] The invention relates to the technical field of road base materials and industrial solid waste treatment, in particular to a novel tailings mixed soil road base material and a preparation method thereof. Background technique [0002] With the rapid development of our country's economy, the scale of highway construction is also increasing, and some problems in the construction process are gradually revealed. First of all, there is a large amount of internal and external transportation of earthwork in road construction. Today, with the strengthening of urban environmental governance, the cost of soil disposal has risen sharply. Stones can easily cause vegetation damage, soil erosion, and cause irreversible damage to nature. Therefore, how to make full use of local materials, reduce the use of natural sand and stone, and reduce transportation costs has become an urgent problem for researchers in the field of road engineering. [0003] Tailings belong to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/02
CPCC04B28/02C04B2201/50C04B2111/0075C04B2111/00017C04B18/12C04B14/10C04B22/064C04B24/24C04B16/0633
Inventor 黄伟刘鸿飞叶雨尘赵鲁卿陈明明张耄耋
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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