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Toughened tailings ball concrete and preparation method thereof

A technology of concrete and tailings, which is applied in the field of construction concrete, can solve the problems of restricting the application of tailings concrete, low tensile strength, and heavy weight, and achieve the effects of promoting green sustainable development, improving compactness, and preventing secondary pollution

Inactive Publication Date: 2019-09-27
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with ordinary concrete, tailings concrete has the advantages of energy saving, environmental protection, and low cost. At the same time, it has the disadvantages of heavy weight, high brittleness, and low tensile strength, which limits the application of tailings concrete.

Method used

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  • Toughened tailings ball concrete and preparation method thereof
  • Toughened tailings ball concrete and preparation method thereof
  • Toughened tailings ball concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A toughened tailings ball concrete is characterized in that the toughened tailings ball concrete uses tailings balls as the concrete coarse aggregate, iron tailings powder as the concrete fine aggregate and is reinforced with steel fibers, and the toughened The tailings ball concrete is prepared according to the mass fraction of the following components: cement 14.93%, tailings balls 44.77%, iron tailings powder 29.85%, water reducing agent 0.14%, steel fiber 4.57%, water 5.74%.

[0044] A preparation method of toughened tailings ball concrete is carried out according to the following steps:

[0045] 1. Preparation of tailings pellets

[0046] 1.1 Preparation of raw materials

[0047] Raw materials are prepared, iron tailings powder accounts for 70% of the total mass of all materials, cement accounts for 20% of the total mass of all materials, and water accounts for 10% of the total mass of all materials;

[0048] 1.2 centrifugal molding

[0049] Dry mix the iron tai...

Embodiment 2

[0066] A toughened tailings ball concrete is characterized in that the toughened tailings ball concrete uses tailings balls as the concrete coarse aggregate, iron tailings powder as the concrete fine aggregate and is reinforced with steel fibers, and the toughened The tailings ball concrete is prepared according to the mass fraction of the following components: cement 14.93%, tailings balls 44.77%, iron tailings powder 28%, water reducing agent 0.14%, steel fiber 4.57%, water 7.59%.

[0067] A preparation method of toughened tailings ball concrete is carried out according to the following steps:

[0068] 1. Preparation of tailings pellets

[0069] 1.1 Preparation of raw materials

[0070] Raw materials are prepared, iron tailings powder accounts for 70% of the total mass of all materials, cement accounts for 20% of the total mass of all materials, and water accounts for 10% of the total mass of all materials;

[0071] 1.2 centrifugal molding

[0072] Dry mix the iron tailin...

Embodiment 3

[0083] A toughened tailings ball concrete is characterized in that the toughened tailings ball concrete uses tailings balls as the concrete coarse aggregate, iron tailings powder as the concrete fine aggregate and is reinforced with steel fibers, and the toughened The tailings ball concrete is prepared according to the mass fraction of the following components: 14% cement, 42% tailings balls, 28% iron tailings powder, 0.14% water reducer, 1.6% steel fiber, and 14.26% water.

[0084] A preparation method of toughened tailings ball concrete is carried out according to the following steps:

[0085] 1. Preparation of tailings pellets

[0086] 1.1 Preparation of raw materials

[0087] Raw materials are prepared, iron tailings powder accounts for 70% of the total mass of all materials, cement accounts for 20% of the total mass of all materials, and water accounts for 10% of the total mass of all materials;

[0088] 1.2 centrifugal molding

[0089] Dry mix the iron tailings powder...

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Abstract

The invention belongs to the technical field of concrete production, and relates to toughened tailings ball concrete and a preparation method thereof. The toughened tailings ball concrete is prepared by replacing a common concrete coarse aggregate with tailings balls, replacing a fine aggregate with iron tailings powder (that is to say, iron tailings is the main raw material for fully replacing concrete aggregate) and adding steel fibre, water and a water reducer. The raw materials include (by mass): 14-17% of cement, 42-52% of tailings balls, 28-34% of iron tailings powder, 0.14-0.17% of a water reducer, 1.6-4.7% of steel fibre and 5.2-6.3% of water. By using the iron tailings as the main raw material for fully replacing concrete aggregate, utilization rate of tailings is greatly enhanced, and the steel fibre is added to improve toughness of the tailings concrete. Meanwhile, iron tailings powder is centrifuged into balls, thus enclosing toxic substances in the tailings balls and effectively preventing secondary pollution.

Description

technical field [0001] The invention relates to the field of building concrete, in particular to a toughened tailings ball concrete and a preparation method thereof. Background technique [0002] The large-scale construction of my country's infrastructure consumes a large amount of concrete, and the price of sand and gravel mines continues to rise. On the other hand, solid waste such as iron tailings is piled up in large quantities, and the utilization rate is extremely low. From cost and environmental considerations, it is urgent to find suitable alternative materials. [0003] Tailings are solid wastes discarded by mining enterprises in the process of refining the main raw materials for metallurgy. They are generally stored in tailings ponds. A large amount of tailings not only wastes resources, pollutes the environment, but also occupies land resources. Tailings are similar to traditional building materials in terms of resource characteristics. Using tailings as concrete...

Claims

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Application Information

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IPC IPC(8): C04B28/00
CPCC04B28/00C04B2201/50C04B18/12C04B14/48C04B2103/302
Inventor 李艺陶云霄王迎港黄小斌塔拉
Owner NORTHEASTERN UNIV
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