Organic-inorganic compound alkali-free flash setting admixture and preparation method thereof

A composite, accelerator technology, applied in the fields of cement-based cementitious material chemical industry and concrete admixtures, can solve the problems of poor adaptability of alkali-free accelerators, achieve obvious strength increase, increase dissolution rate, and reduce crystallization. degree of effect

Active Publication Date: 2018-04-27
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

According to the current situation that the alkali-free accelerator has poor adaptability and is easy to crystallize, there is no targeted product and component design. The scope of application of coagulant system

Method used

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  • Organic-inorganic compound alkali-free flash setting admixture and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0080] Step 1, according to total mass parts as 100 parts, weighing

[0081] Nitric acid: 1 part;

[0082] Citric acid: 0.2 parts;

[0083] Aluminum sulfate: 20 parts;

[0084] Calcium sulfate: 6.5 parts

[0085] Diethanolamine: 3.8 parts;

[0086] Industrial grade polyaluminum sulfate: 24 parts;

[0087] Lower alcohol: a composition of ethylene glycol and glycerol with a mass ratio of 1:1, 0.5 parts;

[0088] Wetting agent: a composition of nonylphenol polyoxyethylene ether phosphate monoester and propylene glycol polyoxypropylene polyoxyethylene block polyether with a mass ratio of 1:1, 0.2 parts;

[0089] Anti-settling agent: a mixture of PEG800 modified organobentonite and amide-modified hydrogenated castor oil with a mass ratio of 2:1, 0.05 part;

[0090] The remainder is water;

[0091] Step 2, prepare the aqueous solution of alkanolamine metal complex, specifically as follows:

[0092] 1) Add mineral acid, complexing agent, metal sulfate and 25 parts of water in...

Embodiment 3

[0099] Step 1, according to total mass parts as 100 parts, weighing

[0100] Nitric acid: 1 part;

[0101] Phosphoric acid: 2 parts;

[0102] Tartaric acid: 0.8 parts;

[0103] Aluminum sulfate: 18.7 parts;

[0104] Magnesium sulfate: 3.3 parts

[0105] Diethanol monoisopropanolamine: 6.5 parts;

[0106] Polyaluminum sulfate: 21 parts;

[0107] Lower alcohol: a composition of ethylene glycol and glycerol with a mass ratio of 1:1, 2 parts;

[0108] Wetting agent: a composition of nonylphenol polyoxyethylene ether phosphate monoester and tetradecyl polyoxyethylene ether succinic acid monoester sulfonate with a mass ratio of 1:1, 0.15 parts;

[0109] Anti-settling agent: a mixture of PEG800 modified organobentonite and amide-modified hydrogenated castor oil with a mass ratio of 2:1, 0.02 parts;

[0110] The remainder is water;

[0111] Step 2, prepare the aqueous solution of alkanolamine metal complex, specifically as follows:

[0112] 1) Add mineral acid, complexing age...

Embodiment 4

[0119] Step 1, according to total mass parts as 100 parts, weighing

[0120] Phosphoric acid: 1 part;

[0121] Sodium alginate: 0.2 parts;

[0122] Aluminum sulfate: 22 parts;

[0123] Iron sulfate: 3.7 parts

[0124] Monoethanol diisopropanolamine: 3.5 parts;

[0125] Industrial grade polyaluminum sulfate: 25 parts;

[0126] Lower alcohol: a composition of ethylene glycol and glycerol with a mass ratio of 1:1, 1.5 parts;

[0127] Wetting agent: a composition of nonylphenol polyoxyethylene ether phosphate monoester and aliphatic amine polyoxyethylene ether sulfosuccinic acid monoester disodium salt with a mass ratio of 1:1, 0.2 parts;

[0128] Anti-settling agent: a mixture of PEG800 modified organobentonite and amide-modified hydrogenated castor oil with a mass ratio of 2:1, 0.04 parts;

[0129] The remainder is water;

[0130] Step 2, prepare the aqueous solution of alkanolamine metal complex, specifically as follows:

[0131] 1) Add mineral acid, complexing agent, m...

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Abstract

The invention discloses an organic-inorganic compound alkali-free flash setting admixture and a preparation method thereof. The alkali-free flash setting admixture is prepared by: subjecting a metal sulfate and alkanolamine to high temperature polymerization under the catalysis of inorganic acid, then attaching polyaluminum sulfate, low alcohol, a wetting agent and an anti-settling agent. Specifically, the organic-inorganic compound alkali-free flash setting admixture comprises: 1-3 parts of inorganic acid, 0.2-0.8 part of a complexing agent, 20-30 parts of a metal sulfate, 3.5-6.0 parts of alkanolamine, 20-25 parts of polyaluminum sulfate, 0.5-2.0 parts of low alcohol, 0.05-0.2 part of the wetting agent, 0.02-0.05 part of the anti-settling agent, and the balance water, with the total massfraction being 100 parts. The preparation method is carried out according to the steps of: 1. synthesis, 2. curing, 3. compounding and 4. filtration. Under the condition of a low dosage of the alkali-free flash setting admixture, the cement setting time and colloidal mortar strength can meet the requirements of the first grade product of JC477-2005 shotcrete flash setting admixture, as an inorganic and organic compounding way is adopted in terms of the synthesis and compounding system, the alkali-free flash setting admixture has strong adaptability and high cost performance.

Description

technical field [0001] The invention belongs to the technical field of concrete admixture, relates to the technical field of cement-based cementitious material chemical industry, and is used in key projects such as mine shafts, railway tunnels, water diversion culverts, underground projects, road bridges, tunnels, high-speed rail, nuclear power and the like. Background technique [0002] The application of liquid alkali-free accelerators in foreign countries has been quite extensive, especially in developed countries such as Japan and Europe, there are almost no alkaline accelerators, and the development of liquid accelerators in my country is far behind foreign countries. The setting time and strength of cement failed to meet the first-class product requirements stipulated in JC477-2005 "Accelerators for Shotcrete". In addition, the non-alkali quick-setting agent is prone to the problems of short product storage period and poor adaptability. It is shown that within the nor...

Claims

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Application Information

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IPC IPC(8): C04B24/32C04B103/12
CPCC04B40/0039C04B2103/12C04B22/141C04B22/16C04B22/148C04B22/142C04B24/122C04B24/026C04B24/243C04B24/32C04B14/104C04B24/124C04B22/085C04B24/06C04B22/143C04B22/165C04B24/166
Inventor 柯凯占聪文帅涛常鹰
Owner HUBEI UNIV OF TECH
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