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Alkali-free liquid accelerator and preparation method thereof

A technology of quick-setting agent and liquid, applied in the field of alkali-free liquid quick-setting agent and its preparation, can solve the problems of strong alkalinity, difficult preservation and high cost, and achieve the effects of easy preservation, low cost and early strength improvement

Pending Publication Date: 2020-08-25
湖南武源建材有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a non-alkali liquid quick-setting agent and its preparation method, in order to solve the problem that the common liquid quick-setting agent has strong alkalinity, high cost and is not easy to store

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] An embodiment of the present invention is a non-alkali liquid quick-setting agent, comprising the following components in parts by weight: 300 grams of polyaluminum sulfate, 50 grams of ferrous sulfate, 1 gram of oxalic acid, 10 grams of triisopropanolamine, 10 grams of sodium fluoride, 1 gram of polyacrylamide and a reagent carrier, the above-mentioned components are mixed with the reagent carrier to form a solvent; wherein triisopropanolamine and sodium fluoride all have coagulation-promoting effects on concrete, but they have no effect on concrete. The coagulation-accelerating effects of soil are not all the same, and more importantly, they have different effects on the strength of concrete, so it should not be considered that every chemical substance can be used as a material for configuring accelerators.

[0024] Among them, polyaluminum sulfate is the main component of coagulation accelerator, because it contains the basic substance "aluminum ion" for coagulation a...

Embodiment 2

[0034] Based on the above-mentioned embodiment, an embodiment of the present invention is a non-alkali liquid quick-setting agent, comprising the following components in parts by weight: 350 grams of polyaluminum sulfate, 60 grams of ferrous sulfate, 5 grams of oxalic acid, triisopropyl 20 grams of alcohol amine, 20 grams of sodium fluoride, 5 grams of polyacrylamide and reagent carrier, and the rest is water.

[0035] Among them, the alcohol amine in triisopropanolamine can be miscible with water, and its molecule contains a nitrogen atom, and there is a lone pair of electrons on the nitrogen atom, thereby forming a covalent bond with some metal ions with empty orbitals, and complexing to form Stable soluble complex ion.

[0036] Appropriately increasing the content of triisopropanolamine will improve the grinding aid effect, and its triisopropanolamine can stimulate the chemical reaction between the substance and Ca, Si, Al, etc. At the same time, it causes the lattice defe...

Embodiment 3

[0039] Based on the above-mentioned embodiment, an embodiment of the present invention is a non-alkali liquid quick-setting agent, comprising the following components in parts by weight: 400 grams of polyaluminum sulfate, 70 grams of ferrous sulfate, 10 grams of oxalic acid, triisopropyl 30 grams of alcohol amine, 30 grams of sodium fluoride, 10 grams of polyacrylamide and reagent carrier, and the rest is water.

[0040] Among them, the amount of polyaluminum sulfate is the main cost, and its water-cement ratio is 0.3. The experiment is carried out on the influence of the setting time of the concrete paste. The experimental method is carried out in accordance with the standard of JC477-2005 "Accelerator for Shotcrete". The powdery raw materials are all ground with a mortar and passed through a 0.08mm square hole sieve. After accurate weighing, they are firstly mixed with concrete and then mixed with water; liquid raw materials are first mixed with weighed water and then mixed wit...

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Abstract

The invention discloses an alkali-free liquid accelerator and a preparation method thereof. The liquid accelerator is prepared from the following components in parts by weight: 30 to 50 parts of polyaluminum sulfate; 5 to 10 parts of ferrous sulfate; 0.1 to 2 parts of oxalic acid; 1 to 5 parts of triisopropanolamine; 1 to 4 parts of sodium fluoride; 0.1 to 2 parts of polyacrylamide; and a reagentcarrier. The invention is expected to solve the problems that a common liquid accelerator is relatively strong in alkalinity, relatively high in cost and not easy to store.

Description

technical field [0001] The invention relates to sprayed concrete technology, in particular to an alkali-free liquid quick-setting agent and a preparation method thereof. Background technique [0002] Shotcrete is generally a construction method of spraying and pouring fine stone concrete with a pressure spray gun. The pre-prepared cement, sand, stones, water and a certain amount of admixture are loaded into the sprayer and sent to the nozzle and sprayer with high-pressure air. After the accelerator is mixed, it is sprayed to the surface of rock or concrete at a high speed. [0003] Because the sprayed concrete will produce a large amount of dust, which is harmful to the human body, and the uniformity of the mixing during the spraying process is poor, which seriously affects the quality of the shotcrete. At the same time, the traditional shotcrete has a large amount of rebound and is easy to It causes huge waste of materials and also has a certain impact on the quality of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/26C04B103/12C04B22/14C04B22/12C04B24/04C04B24/12
CPCC04B40/0039C04B2103/12
Inventor 付光跃郭松盛东林周来谭志强
Owner 湖南武源建材有限责任公司
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