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Novel high-strength high-water-retention coal ash high-water material

A high-water material, fly ash technology, applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problem of unreasonable use of fly ash, production cost of dehydration under pressure, and later strength Low-level problems, to achieve the effect of simple construction, good pumping performance and fast coagulation speed

Inactive Publication Date: 2017-12-01
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention provides a new type of high-strength and high-water-retaining fly ash high-water material to solve the problems of low late strength, serious dehydration under pressure and high production cost of current high-water materials, as well as the environmental problems caused by unreasonable utilization of fly ash. pollution and waste of resources

Method used

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  • Novel high-strength high-water-retention coal ash high-water material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1 (comparative example)

[0031] Weigh component A: A material (sulfoaluminate cement clinker 140g), B material (lime + gypsum 140g), A-A material (retarder + suspending agent 14g), B-B material (accelerator + early strength agent + dispersant 5.6g);

[0032] Take component B: Example 1 is a comparison group, without fly ash;

[0033] Measure water: 900ml;

[0034] After mixing A and A-A, add 450ml of water, put in a mixer and stir evenly for 5-10 minutes to make A slurry;

[0035] After mixing B and B-B, add 450ml of water, put in a mixer and stir evenly for 5-10 minutes to make B slurry;

[0036] Mix A slurry and B slurry, put in a mixer and stir evenly for 5-10 minutes to make a high-water material slurry;

[0037] The high-water material slurry is injected into a φ50×100mm mold to make a high-water material specimen.

Embodiment 2

[0039] Weigh component A: A material (sulfoaluminate cement clinker 140g), B material (lime + gypsum 140g), A-A material (retarder + suspending agent 14g), B-B material (accelerator + early strength agent + dispersant 5.6g);

[0040] Weigh component B: Weigh fly ash (5%): 14.96g;

[0041] Measure water: 900ml;

[0042] After mixing A and A-A, add 450ml of water, put in a mixer and stir evenly for 5-10 minutes to make A slurry;

[0043] After mixing B and B-B, add 450ml of water, put in a mixer and stir evenly for 5-10 minutes to make B slurry;

[0044] Mix A slurry and B slurry, put in a mixer and stir evenly for 5-10 minutes to make a high-water material slurry;

[0045] Mix the weighed fly ash into the high-water material slurry, place it in a mixer and stir evenly for 5-10 minutes, and make the fly ash high-water material slurry;

[0046] The fly ash high-water material slurry with a content of 5% was injected into a φ50×100mm mold to make a new type of high-strength an...

Embodiment 3

[0048] Weigh component A: A material (sulfoaluminate cement clinker 140g), B material (lime + gypsum 140g), A-A material (retarder + suspending agent 14g), B-B material (accelerator + early strength agent + dispersant 5.6g);

[0049] Weigh component B: Weigh fly ash (10%): 29.92g;

[0050] Measure water: 900ml;

[0051] After mixing A and A-A, add 450ml of water, put in a mixer and stir evenly for 5-10 minutes to make A slurry;

[0052] After mixing B and B-B, add 450ml of water, put in a mixer and stir evenly for 5-10 minutes to make B slurry;

[0053] Mix A slurry and B slurry, put in a mixer and stir evenly for 5-10 minutes to make a high-water material slurry;

[0054] Mix the weighed fly ash into the high-water material slurry, place it in a mixer and stir evenly for 5-10 minutes, and make the fly ash high-water material slurry;

[0055] A 10% fly ash high-water material slurry was injected into a φ50×100mm mold to make a new type of high-strength and high-water reten...

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Abstract

The invention discloses a novel high-strength high-water-retention coal ash high-water material. The materials is prepared from a first major part and a second major part, wherein the first major part consists of 65%-75% of water, a material A (15%-20% of sulphoaluminate cement clinker), a material B (4%-6% of lime and 10%-15% of gypsum), a material A-A (1%-2% of a retarder and 2%-4% of a suspending agent), and a material B-B (0.1%-0.5% of a setting accelerator, 1%-2% of an early strength agent and 1%-2% of a dispersing agent), and the material A, the material A-A, the material B-B and the material B meet a relationship of A:(A-A):(B-B):B= 1:0.1:1:0.04. The coal ash weight of the second major part can reach 30% of the total weight of all the components except water of the first major part. The novel high-strength high-water-retention coal ash high-water material has the advantages of high later-stage strength, good water retention during a stress process, recycle of resources, environment protection and cost saving, and can be applied on a large scale to the field of long-term stable supporting and filling in mining areas

Description

technical field [0001] The invention belongs to the field of mining, and in particular relates to a long-term stable filling material used in coal mining by the filling method in coal mining. Background technique [0002] Mining will bring a series of ecological problems, among which surface subsidence is particularly prominent. In order to reduce or even avoid problems such as building settlement caused by mining, it is generally necessary to fill the goaf. [0003] High-water materials have the characteristics of fast condensing speed, good pumping performance, high filling rate and environmental protection, so they have been widely used in the fields of support and filling in mining areas in recent years. [0004] Traditional high-water materials have problems such as low strength in the later stage, high cost of raw materials, and serious water loss during the compression process. The low strength in the later stage affects the filling life of high-water materials. The...

Claims

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Application Information

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IPC IPC(8): C04B28/14C04B18/08
CPCC04B18/08C04B28/14C04B2201/50C04B7/323C04B22/064C04B2103/22C04B2103/0068C04B2103/12C04B2103/408Y02W30/91
Inventor 冯波刘长武吴帆李晓龙刁兆丰孙位
Owner SICHUAN UNIV
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