Self-flatting material of gypsum mine and preparation process thereof

A self-leveling and gypsum technology, applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problems of frosting, crystal structure damage, poor structural stability of hardened body, etc., and achieve simple production process, solidification The effect of moderate time and low production cost

Inactive Publication Date: 2006-06-28
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the poor water resistance of the product and the phenomenon of frosting, it has not entered the stage of practical application.
Through research, the reasons are preliminarily analyzed: (1) The calcination temperature is too high, which makes the initial water-filled spac

Method used

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  • Self-flatting material of gypsum mine and preparation process thereof

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Experimental program
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Effect test

Embodiment 1

[0023] Such as figure 1 As shown, the preparation method of gypsum tailings self-leveling material includes the following steps: 1). Preparation of gypsum tailings powder: crushing gypsum tailings to a particle size of less than 10mm, and then grinding to 0.08mm square hole sieve 15% fine powder for later use; 2). Preparation of slag powder: drying and grinding the water-quenched slag discharged from iron and steel enterprises until the specific surface area is greater than 5001-8000cm 2 / g standby; 3). With the mass percent as the gypsum tailings powder of 45, the mass percent is the ground slag powder of 20, the mass percent is the ordinary portland cement of 5, and the mass percent is the dry river sand of 30; Activator (quicklime) accounting for 1% of the mass of gypsum tailings powder, slag powder, ordinary Portland cement and river sand and 1.5% of the mass of gypsum tailings powder, slag powder, ordinary Portland cement and river sand % early strength agent (calcined a...

Embodiment 2

[0025] The preparation method of gypsum tailings self-leveling material comprises the following steps: 1). The preparation of gypsum tailings powder: crush the gypsum tailings to a particle size of less than 10mm, and then grind the gypsum tailings until the sieve residue of 0.08mm square hole is 15 % fine powder for subsequent use; 2). Preparation of slag powder: drying and grinding the water-quenched slag until the specific surface area is greater than 5000cm 2 / g standby: 3). With the gypsum tailings powder that mass percentage is 50, the finely ground slag powder that mass percentage is 18, the ordinary portland cement that mass percentage is 8, the dry river sand that mass percentage is 24; 1% of the activator (slaked lime) and 1.5% of the mass of gypsum tailings powder, slag powder, ordinary Portland cement and river sand % early strength agent (calcined alunite, ground into powder), accounted for 1% of the mass of gypsum tailings powder, slag powder, ordinary Portland c...

Embodiment 3

[0027] The preparation method of gypsum tailings self-leveling material is characterized in that it includes the following steps: 1). Preparation of gypsum tailings powder: crushing gypsum tailings to a particle size of less than 10mm, and then grinding to 0.08mm square hole sieve 15% fine powder for later use; 2). Preparation of slag powder: drying and grinding the phosphorus slag until the specific surface area is greater than 5000cm 2 / g spare (lower control limit is enough); 3). According to the mass percentage of each raw material: gypsum tailings powder 40, slag powder 20, ordinary Portland cement 10, river sand 30 to choose gypsum tailings powder, slag powder , ordinary Portland cement and river sand; according to the activator (slaked lime) accounting for 0.8% of the mass of gypsum tailings powder, slag powder, ordinary Portland cement and river sand, the proportion of early strength agent (alum powder) in gypsum tailings 1.3% of the mass of slag powder, slag powder, or...

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Abstract

A self-leveling material is proportionally prepared from the gypsum ore tailings, slag powder, ordinary silicate cement, river sand, trigger, early-strengthening agent, redispersible colloid powder, and efficient water-reducing agent.

Description

technical field [0001] The invention belongs to the technical field of new building materials, and in particular relates to a method for preparing self-leveling materials from gypsum tailings. Background technique [0002] Gypsum tailings refer to gypsum ore with a dihydrate gypsum content of less than 50%. Because it contains various impurities, it cannot be used for calcined plaster and becomes an industrial waste. At present, there are a large number of gypsum mines in major gypsum mines, which not only occupy land, affect production, but also pollute the environment. Therefore, the recycling of gypsum tailings has attracted people's attention. [0003] In the early 1980s, Yingcheng Gypsum Mine in Hubei Province conducted research on the recycling of gypsum tailings. The preparation method is as follows: the gypsum tailings are calcined at a high temperature (over 800° C.) to convert the dihydrate gypsum into anhydrous gypsum, and then add cement and other additives. H...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B18/12C04B24/00C04B103/30C04B103/40C04B111/72
CPCY02W30/91
Inventor 姜洪义
Owner WUHAN UNIV OF TECH
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