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Modified gas-forming additive and lightweight concrete doped with a large amount of tailings wet slag

A technology of lightweight concrete and additives, applied in the C04 field, to achieve the effects of reducing pollution, saving precious mineral resources, and simple preparation

Active Publication Date: 2015-12-09
唐山冀东发展集成房屋有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to solve the existing additives for the production of lightweight concrete, it is necessary to use special equipment, strict restrictions on complex processes, and overcome time and raw material constraints, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Take respectively: 1.8 parts of light calcium carbonate, 1.5 parts of calcium lignosulfonate, 1.2 parts of calcium carbide, 0.8 parts of corn starch, 1.8 parts of sodium aluminate, 0.1 part of lithium carbonate, 0.4 parts of sodium bicarbonate, and 0.2 parts of aluminum sulfate. The components are respectively ground to 150 mesh, dry-mixed and stirred evenly, and then stored to obtain a modified gas-generating additive with a large amount of waste tailings wet slag in ordinary Portland cement.

[0024] Take respectively: modified gas-generating additive 0.5%, water 27%--50% (the water-cement ratio is determined according to the moisture content of tailings wet slag), base material; ordinary Portland 42.5 cement 10%, tailings wet slag 90% According to the above ratio, add water first, then add ordinary Portland cement and waste tailings wet slag, use ordinary mortar mixer or manual mixing to mix the cement and slag base materials evenly, add modified gas-generating additi...

Embodiment 2

[0026] Take respectively: 1.8 parts of light calcium carbonate, 1.5 parts of calcium lignosulfonate, 1.2 parts of calcium carbide, 0.8 parts of corn starch, 1.8 parts of sodium aluminate, 0.1 part of lithium carbonate, 1.4 parts of sodium bicarbonate, and 0.2 parts of aluminum sulfate. The components are respectively ground to 150 mesh, dry-mixed and stirred evenly, and then stored to obtain a modified gas-generating additive with a large amount of waste tailings wet slag in ordinary Portland cement.

[0027] Take respectively: modified gas-generating additive 1%, water 27%--50% (adjust the water-cement ratio according to the moisture content of waste tailings wet slag), base material; ordinary Portland 42.5 cement 49%, waste tailings wet slag 50%, first add water according to the above ratio, add 49% of ordinary Portland cement 42.5, add 50% of waste tailings wet slag, use ordinary mortar mixer and follow the ordinary mortar mixing procedure or manually stir, stir the base mat...

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Abstract

The invention discloses a modified gas-forming additive and lightweight concrete doped with a large amount of tailings wet slag. The modified gas-forming additive is prepared by mixing the following compositions in parts by weight: 1.8+ / -0.036 part of light calcium carbonate (CaCO3), 1.5+ / -0.03 part of calcium lignin sulphonate(C20H24CaO10S2), 1.2+ / -0.02 parts of calcium carbide (CaC2), 0.8+ / -0.016 part of corn starch (C6H10O5)n, 1.8+ / -0.036 parts of sodium aluminate (Ai2Na2O4), 0.1+ / -0.002 part of lithium carbonate (Li2CO3), 0.4+ / -0.008 part of sodium bicarbonate (NaHCO3), and 0.2+ / -0.004 part of aluminium sulfate ([Ai2(SO4)]3). The lightweight concrete is prepared by mixing the following compositions in percent by weight: 10%-49% of a base material ordinary portland cement, 0.5%-1% of the modified gas-forming additive, 27%-50% of water, and 50%-90% of waste tailings wet slag. The additive is simple to prepare, low in cost and easy to store. The lightweight concrete is good in thermal-insulation property, light in weight, low in elasticity and damping property, and excellent in compaction resistance, freeze thaw resistance, sound resistance and water proofness, and the raw material and product comprehensive cost is reduced.

Description

technical field [0001] The invention relates to the technical field of C04, a modified gas-generating additive and a large-volume waste tailings wet slag prepared with the additive. Background technique [0002] In order to reduce costs, improve the environment, and save energy, people use a large number of foamed cement or add waste materials such as straw, sawdust, and slag to the cement to make lightweight concrete building materials. Due to the different additives used, or the different waste materials such as slag added to the cement, the quality of the lightweight concrete building materials produced is also different. [0003] After searching the keywords of "foaming cement", there are more than 400 items in total, and the keywords of "lightweight concrete" are searched for a total of 1217 items. The same case as the technology of the present invention has not been found. [0004] The existing lightweight concrete has extremely strict requirements on the raw materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B14/28C04B24/18C04B22/10
Inventor 王术永徐征徐可新
Owner 唐山冀东发展集成房屋有限公司
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