Concrete admixture based on iron tailing powder and preparation method of concrete admixture

A technology of iron tailings powder and admixture, which is applied in the field of concrete, can solve the problems of environmental pollution, seriousness, and low utilization rate, and achieve the effect of reducing costs and increasing added value

Inactive Publication Date: 2019-10-25
江苏金木土科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] With the rapid development of the steel industry, the quantity of iron tailings is increasing rapidly, but its utilization rate is very low, and the pollution to the environment is also becoming more and more serious

Method used

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  • Concrete admixture based on iron tailing powder and preparation method of concrete admixture

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Experimental program
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Effect test

Embodiment 1

[0020] In the embodiment of the present invention, a concrete admixture based on iron tailings powder is made of the following components in proportion by weight: iron tailings powder + natural gypsum is specifically 59.7%, and Class I fly ash is specifically 59.7%. 25%; S105 mineral powder is 15%, liquid functional regulator is 0.3%;

[0021] The content of SiO2 in the iron tailings used is 62.13%, the content of CaO is 5.12%, the content of MgO is 4.36%, the content of Fe2O3 is 10.23%, and the content of Al2O3 is 9.65%. %, water requirement ≤95%, loss on ignition ≤5.0%; SO3 content in S105 slag micropowder ≤4.0%, basic coefficient >1, vitreous content ≥90%, 28d activity index ≥105%.

[0022] A preparation method of a concrete admixture based on iron tailings powder, comprising the following steps:

[0023] Step 1: Dry the iron tailings in a blast drying oven at 105°C until constant weight and set aside;

[0024] Step 2: Mix the dried iron tailings and natural gypsum evenly...

Embodiment 2

[0029] A concrete admixture based on iron tailings powder, which is made of the following components by weight: iron tailings powder + natural gypsum is specifically 52.5%, Class I fly ash is specifically 23%; S105 ore The powder is specifically 24%, and the liquid functional regulator is specifically 0.5%;

[0030] The content of SiO2 in the iron tailings used is 62.13%, the content of CaO is 5.12%, the content of MgO is 4.36%, the content of Fe2O3 is 10.23%, and the content of Al2O3 is 9.65%. %, water requirement ≤95%, loss on ignition ≤5.0%; SO3 content in S105 slag micropowder ≤4.0%, basic coefficient >1, vitreous content ≥90%, 28d activity index ≥105%.

[0031] A preparation method of a concrete admixture based on iron tailings powder, comprising the following steps:

[0032] Step 1: Dry the iron tailings in a blast drying oven at 105°C until constant weight and set aside;

[0033] Step 2: Mix the dried iron tailings and natural gypsum evenly in a ratio of 10:1, and the...

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Abstract

The invention discloses a concrete admixture based on iron tailing powder and a preparation method of the concrete admixture. The concrete admixture is prepared from the following components specifically in percentage by weight: 59.7% of the iron tailing powder and natural gypsum, 25% of level-I coal powder ashes, 15% of S105 mineral powder, and 0.3% of a liquid functional conditioning agent. Irontailings used are prepared from the following components in percentage by weight: 62.13% of SiO2, 5.12% of CaO, 4.36% of MgO, 10.23% of Fe2O3 and 9.65% of Al2O3. According to the concrete admixture based on the iron tailing powder and the preparation method of the concrete admixture, through certain activating treatment, the pozzolanic activity of the iron tailings is shown, the iron tailings andother mineral admixtures are compounded in proportion to produce a synergistic effect, the different mineral admixtures are made to exert respective advantages, the effect of complementary to each other is reached, the iron tailings can be developed to be the concrete admixture, then the additional value of the iron tailings is improved, and the cost of cement concrete is further lowered.

Description

technical field [0001] The invention relates to the technical field of concrete, in particular to a concrete admixture based on iron tailings powder and a preparation method thereof. Background technique [0002] High-performance concrete is widely used because it can greatly improve the performance of conventional concrete. Mineral admixtures have become one of the essential components of high performance concrete. Some researchers even believe that it is precisely because of the development of mineral admixtures that the development and utilization of some chemical admixtures have been promoted, and the concept of high-performance concrete has also been promoted. The mineral admixtures commonly used at present include blast furnace slag, fly ash, silica fume and so on. While these commonly used mineral admixtures are widely used and developed in high-performance concrete, they also have a series of disadvantages such as insufficient supply, low density and difficult tran...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/12C04B28/02
CPCC04B28/02C04B40/0039C04B2201/50C04B18/12C04B14/365C04B18/08C04B18/141C04B22/08C04B24/122C04B24/005C04B14/06
Inventor 牟忠江陆国森
Owner 江苏金木土科技有限公司
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