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Concrete material by using tail sand to displace yellow sand and preparation method thereof

A technology for concrete and tailings, applied in sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problems of high extraction rate, low cost, high energy consumption, and achieve simple preparation process, excellent performance, saving The effect of resources

Inactive Publication Date: 2011-06-15
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Shougang Dashihe Iron Mine, after realizing the damage to the environment and the waste of resources by iron ore tailings, developed and prepared tailings autoclaved bricks and aerated concrete test blocks, which alleviated the destructive effect of iron ore tailings to a certain extent , but this technology requires instruments and equipment suitable for the project, and the energy consumption required to prepare the product is relatively high
The patent with the publication number CN1765520 describes a method for extracting iron from iron ore tailings. The invention has low cost, high extraction rate, high grade iron, and high technical and economic value. After the remaining waste is still to be processed

Method used

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  • Concrete material by using tail sand to displace yellow sand and preparation method thereof
  • Concrete material by using tail sand to displace yellow sand and preparation method thereof
  • Concrete material by using tail sand to displace yellow sand and preparation method thereof

Examples

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Embodiment 1

[0031] Weigh the cement, industrial waste and tailings according to the ratio shown in Table 1 and mix them uniformly in the concrete mixer; weigh the admixture and water according to the ratio shown in Table 1, mix them uniformly, and pour them into the uniformly stirred solid raw materials. Continue to stir to obtain a well-stirred concrete mixture; pour the concrete mixture in the mixer into the mold, and vibrate and compact it on the vibrating table; put the concrete material in the mold under standard conditions for 24 hours, wait for After hardening, the formwork was removed, and the prepared concrete material was cured under standard conditions for 7 days, and then cured in hot water at 95°C for 24 hours. After curing, test the flexural and compressive strength of the concrete material, the test results are as follows: figure 1 shown. The tailings in Example 1 are iron ore tailings, the cement is 52.5 Portland cement, the industrial waste residue is a mixture of silica...

Embodiment 2

[0035] Weigh the cement, industrial waste residue and tailings according to the ratio shown in Table 2 and mix them evenly in the concrete mixer; weigh the admixture and water according to the ratio shown in Table 2 and mix them evenly, then pour them into the evenly stirred solid raw materials , continue to stir; weigh the steel fibers according to the ratio shown in Table 2, evenly sprinkle them in the mixer, and stir further, so as to obtain a uniformly stirred fiber concrete mixture; pour the fiber concrete mixture in the mixer into the mold , and vibrated on a vibrating table for compaction; the concrete material in the mold was left to stand for 24 hours under standard conditions, and after it hardened, the mold was removed, and the prepared concrete material was cured under standard conditions for 7 days, and then placed at 95°C Cured in hot water for 24 hours. After curing, test the flexural and compressive strength of the fiber reinforced concrete material, the test r...

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Abstract

The invention discloses a concrete material by using tail sand to displace yellow sand and a preparation method thereof. The concrete material comprises the following raw materials: cement, industrial waste residue, water reducing agent, tail sand, water and reinforced fiber, wherein the industrial waste residue is one or two or more of silica fume, fly ash, fine slag powder, fine steel slag powder and other industrial byproducts with pozzolanic activity; the tail sand is the byproducts of the mining industry, with the maximum grain size of 3mm, namely the solid wastes of all types of mining enterprises. The preparation method disclosed by the invention is the improvement on preparation of common concrete; the prepared concrete product has good performances; and tail sand is fully utilized and the material and the method disclosed by the invention is environment-friendly.

Description

technical field [0001] The invention relates to a concrete material and a preparation method thereof, in particular to a concrete material prepared by using tailing sand instead of yellow sand and a preparation method of the material. Background technique [0002] Cement concrete is the most widely used material in the construction industry. It is estimated that the annual consumption of concrete in the world is 11 billion tons. Among them, yellow sand occupies a large proportion. [0003] In 2005, the State Council issued a number of opinions on accelerating the development of circular economy issued by the State Council [2005] No. 22, and in 2006 the National Development and Reform Commission’s Fa Gai Ban Huan Zi [2006] No. 538 document on the "Special Plan for Comprehensive Utilization of Resources" both pointed out that : In 2010, the comprehensive utilization rate of tailings and slag in my country will reach more than 86%; the comprehensive utilization rate of industr...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B18/12C04B14/48C04B14/38C04B16/06C04B16/02
CPCC04B28/02Y02W30/91C04B18/12C04B18/141C04B20/0048C04B20/0076C04B40/0028C04B40/02C04B40/0263C04B40/0286C04B2103/302C04B14/38C04B14/48C04B16/06C04B18/08C04B18/146C04B20/008C04B24/2641
Inventor 赖建中杨春梅徐升崔崇
Owner NANJING UNIV OF SCI & TECH
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