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Gypsum-based self-leveling mortar prepared from fine iron tailing sand, and preparation method thereof

A technology of self-leveling mortar and iron tailings, which is applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problems of occupying large land resources, few utilization channels, safety issues, etc., and achieves low cost, Improvement of mechanical properties and durability, and cost reduction effects

Active Publication Date: 2016-12-14
BEIJING BUILDING MATERIALS ACADEMY OF SCI RES +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are few large-scale, high value-added, and effective utilization methods for iron tailings fine sand. The accumulation of a large amount of iron tailings fine sand not only occupies a large amount of land resources, causes serious environmental pollution, but also causes serious environmental pollution due to dam breaks, etc. Problems Create Security Concerns

Method used

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  • Gypsum-based self-leveling mortar prepared from fine iron tailing sand, and preparation method thereof
  • Gypsum-based self-leveling mortar prepared from fine iron tailing sand, and preparation method thereof
  • Gypsum-based self-leveling mortar prepared from fine iron tailing sand, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A gypsum-based self-leveling mortar prepared from iron tailings fine sand, comprising the following components in parts by weight:

[0045]0.3mm≤particle size<0.5mm iron tailings fine sand: 30 parts;

[0046] 0.1≤particle size<0.3mm iron tailings fine sand: 14 parts;

[0047] Iron tailing fine sand with a particle size of <0.1mm: 6 parts;

[0048] High-strength gypsum: 44.645 parts;

[0049] 42.5 grade ordinary Portland cement: 5 parts;

[0050] High-efficiency polycarboxylate superplasticizer: 0.11 parts;

[0051] Redispersible latex powder: 0.05 parts;

[0052] Gypsum retarder: 0.035 parts;

[0053] Low viscosity cellulose ether: 0.06 parts;

[0054] Polyether defoamer: 0.10 parts.

[0055] It can be prepared by uniformly mixing the above raw materials in proportion.

[0056] Table 2 shows the properties of the gypsum-based self-leveling mortar after adding 25% water by weight.

[0057] Table 2 Physical and mechanical properties of gypsum-based self-leveling ...

Embodiment 2

[0060] A gypsum-based self-leveling mortar prepared from iron tailings fine sand, comprising the following components in parts by weight:

[0061] 0.3mm≤particle size<0.5mm iron tailings fine sand: 35 parts;

[0062] 0.1≤particle size<0.3mm iron tailings fine sand: 15 parts;

[0063] Iron tailing fine sand with particle size <0.1mm: 10 parts;

[0064] High-strength gypsum: 35 parts;

[0065] 42.5 grade ordinary Portland cement: 5 parts;

[0066] High-efficiency polycarboxylate superplasticizer: 0.10 parts;

[0067] Redispersible latex powder: 0.10 parts;

[0068] Gypsum retarder: 0.03 parts;

[0069] Low viscosity cellulose ether: 0.05 parts;

[0070] Polyether defoamer: 0.10 parts.

[0071] It can be prepared by uniformly mixing the above raw materials in proportion.

[0072] After adding 25% water by weight to the gypsum-based self-leveling mortar, its properties are shown in Table 3.

[0073] Table 3 Physical and mechanical properties of gypsum-based self-leveling ...

Embodiment 3

[0076] A gypsum-based self-leveling mortar prepared from iron tailings fine sand, comprising the following components in parts by weight:

[0077] 0.3mm≤particle size<0.5mm iron tailings fine sand: 20 parts;

[0078] 0.1≤particle size<0.3mm iron tailings fine sand: 20 parts;

[0079] Iron tailing fine sand with particle size <0.1mm: 10 parts;

[0080] High-strength gypsum: 42 parts;

[0081] 42.5 grade ordinary Portland cement: 8 parts;

[0082] High-efficiency polycarboxylate superplasticizer: 0.14 parts;

[0083] Redispersible latex powder: 0.05 parts;

[0084] Gypsum retarder: 0.042 parts;

[0085] Low viscosity cellulose ether: 0.08 parts;

[0086] Polyether defoamer: 0.18 parts.

[0087] It can be prepared by uniformly mixing the above raw materials in proportion.

[0088] After adding 25% water by weight to the gypsum-based self-leveling mortar, its properties are shown in Table 4.

[0089] Table 4 Physical and mechanical properties of gypsum-based self-leveling...

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Abstract

The invention relates to a gypsum-based self-leveling mortar prepared from fine iron tailing sand and a preparation method thereof. According to the invention, the raw material fine iron tailing sand of three particle size grades, i.e., less than 0.1 mm, no less than 0.1 mm and no more than 0.3 mm, and no less than 0.3 mm and less than 0.5 mm, is compounded according to a certain proportion. The method totally replaces river sand or quartz sand with the fine iron tailing sand; the prepared gypsum-based self-leveling mortar has excellent performance and completely meets requirements on all the performance indexes prescribed in JC / T1023-2007; moreover, the gypsum-based self-leveling mortar prepared from fine iron tailing sand is obviously reduced in cost, wherein the cost of each ton of the gypsum-based self-leveling mortar is reduced by 30 yuan or above.

Description

technical field [0001] The invention relates to the category of preparing special mortar by using iron tailing fine sand, an industrial by-product, in particular to a gypsum-based self-leveling mortar prepared by using iron tailing fine sand and a preparation method thereof. Background technique [0002] Iron tailings fine sand is the waste slag produced during the purification process of the valuable concentrate selected by the concentrator after the ore developed by the iron ore is ground. The particle size of the iron tailings fine sand is less than 0.5mm, and its chemical Indexes such as composition, mineral composition and fineness are relatively stable. At present, there are few large-scale, high value-added, and effective utilization methods for iron tailings fine sand. The accumulation of a large amount of iron tailings fine sand not only occupies a large amount of land resources, causes serious environmental pollution, but also causes serious environmental pollution...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14C04B18/12
CPCC04B18/12C04B28/14C04B2201/50C04B7/02C04B2103/302C04B2103/0057C04B2103/22C04B24/383C04B2103/50Y02W30/91
Inventor 黄天勇陈旭峰张文才章银祥
Owner BEIJING BUILDING MATERIALS ACADEMY OF SCI RES
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