Iron tailing doped high-performance concrete and manufacturing method thereof

A high-performance concrete and manufacturing method technology, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve problems such as the shortage of natural sand resources for iron selection waste, achieve improved durability, improve integrity, The effect of improving the service life

Inactive Publication Date: 2013-06-12
潘锋
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a high-performance concrete mixed with iron tailings and its manufacturing method in order to solve the problem of recycling iron selection waste and the shortage of natural sand resources for concrete preparation raw materials

Method used

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  • Iron tailing doped high-performance concrete and manufacturing method thereof
  • Iron tailing doped high-performance concrete and manufacturing method thereof
  • Iron tailing doped high-performance concrete and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1 Iron-doped tailings high-performance concrete and its manufacturing method

[0018] (1) High-performance concrete with iron tailings, five kinds of concrete with different ratios of raw materials, the quality of raw materials used per cubic meter of high-performance concrete with iron tailings is shown in Table 1,

[0019] Table 1 The mass of raw materials used per cubic meter of high-performance concrete mixed with iron tailings (unit: kg / m 3 )

[0020]

[0021] The Portland cement kind that present embodiment uses is ordinary Portland cement 42.5 grade; The specific surface area of ​​slag powder is greater than 400m 2 / kg, the activity level reaches S75 or above; the specific surface area of ​​fly ash is greater than 150m 2 / kg, grade I and II dry ash with an activity level above S75; water reducer with a water reducing rate greater than 12%; the fineness modulus of iron tailings is between 2.3 and 2.7; the fineness modulus of natural sand Between 2.5 ...

Embodiment 2

[0029] Example 2 Comparison of Cracks

[0030] According to the ratio of raw materials in Table 3 and the manufacturing method of Example 1, concrete with two ratios of raw materials was prepared. The experimental results show that, under other conditions being the same, the number of cracks over 30 mm per square meter in concrete prepared with iron tailings instead of natural sand is 6, and the number of cracks over 30 mm in length per square meter in concrete prepared with natural sand for 21 articles.

[0031] Table 3 Raw material ratio of concrete in this example (unit: kg / m 3 )

[0032]

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Abstract

The invention discloses iron tailing doped high-performance concrete and a manufacturing method thereof. Each cube of the iron tailing doped high-performance concrete is prepared from the following raw materials by weight: 100-450kg of silicate cement, 30-100kg of slag powder, 50-150kg of fly ash, 3-6kg of unsaturated polyester resin, 5-12kg of a water reducing agent, 500-800kg of iron tailings, 850-1050kg of stones and 150-180kg of water. The manufacturing method comprises the following steps of: (1) weighing the iron tailings and the stones according to raw material proportions, then spraying running water to humidify the iron tailings and the stones, and adding the iron tailings and the stones into a double-horizontal-shaft forced concrete mixer when internal water of the iron tailings and stones is saturated; and (2) adding the other raw materials into the double-horizontal-shaft forced concrete mixer according to raw material mass ratios, and stirring for 30-40 seconds to obtain the concrete. By adopting the iron tailing doped high-performance concrete, the integrity, stability and safety of a concrete structure are improved, the durability of the concrete is improved, and the service life of a building is prolonged.

Description

technical field [0001] The invention belongs to the field of inorganic non-metallic materials and can be applied to the industries of on-site mixing concrete, concrete products and ready-mixed concrete. Background technique [0002] At present, on the one hand, the tailings dam formed by iron selection in China occupies a large amount of cultivated land and has not fully played its role. On the other hand, due to large-scale engineering construction, natural sand resources are seriously lacking, and natural sand for preparing high-performance concrete is extremely scarce. Contents of the invention [0003] In order to solve the problem of recycling iron selection waste and lack of natural sand resources as a raw material for concrete preparation, the invention provides an iron-doped tailings high-performance concrete and a manufacturing method thereof. [0004] In order to achieve the above object, the technical scheme adopted in the present invention is: [0005] A k...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B18/30
CPCY02W30/91
Inventor 潘锋王耀文崔君平张兰志
Owner 潘锋
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