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Alkali-activated low-calcium cementitious material slow-coagulation agent based on electromagnetic induction heating coagulation regulation mechanism as well as preparation method and application thereof

A technology of electromagnetic induction heating and retarding binder, which is applied to structural elements, building reinforcements, building components, etc., can solve problems such as delayed or early curing, and achieve the effects of good fluidity, simple preparation method and convenient construction.

Active Publication Date: 2022-05-10
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the setting of traditional retarded mortar requires a specific super retarder, and its retarding time and effect have been fixed when the material is configured, so it cannot be delayed or advanced with the adjustment of the construction period, and cannot cope with the construction period well. or changes in construction conditions

Method used

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  • Alkali-activated low-calcium cementitious material slow-coagulation agent based on electromagnetic induction heating coagulation regulation mechanism as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] An alkali-activated low-calcium gelling material slow-setting binder based on an electromagnetic induction heating coagulation adjustment mechanism, and its preparation method and application method include the following steps:

[0050] 1) Weighing of raw materials, each raw material and its consumption are: 450g of fly ash, 1350g of standard sand, 140g of sodium hydroxide particles, 18g of conductive steel wool fiber, and 180g of water;

[0051] 2) Preparation of alkali-activated fly ash retarding binder:

[0052] Slowly add the weighed solid NaOH particles into the weighed water, and after stirring evenly, place it in a constant temperature and humidity chemical laboratory and let it stand at room temperature for 24 hours to obtain a base activator solution with a relatively stable internal group composition;

[0053] After wetting the blades of the agitator and the mixing pot with a wet rag, pour the weighed fly ash and conductive steel wool fiber into the mixing pot...

Embodiment 2

[0058] A preparation method and application method of an alkali-activated low-calcium gelling material slow-setting binder based on an electromagnetic induction heating coagulation adjustment mechanism include the following steps:

[0059] 1) Weighing of raw materials, each raw material and its consumption are: 450g of fly ash, 1350g of standard sand, 100g of sodium hydroxide particles, 18g of conductive steel wool fiber, and 180g of water;

[0060] 2) Preparation of alkali-activated fly ash retarding binder:

[0061] Slowly add the weighed solid NaOH particles into the weighed water, and place it in a constant temperature and humidity chemical laboratory at room temperature for 24 hours to obtain a base activator solution with a relatively stable internal group composition;

[0062] After wetting the blades of the agitator and the mixing pot with a wet rag, pour the weighed fly ash and conductive steel wool fiber into the mixing pot and mix evenly, then pour the prepared alka...

Embodiment 3

[0066] An alkali-activated low-calcium gelling material slow-setting binder based on an electromagnetic induction heating coagulation adjustment mechanism, and its preparation method and application method include the following steps:

[0067] 1) Weighing of raw materials, each raw material and its consumption are: 450g of fly ash, 1350g of standard sand, 100g of sodium hydroxide particles, 22.5g of sucrose, 18g of conductive steel wool fiber, and 180g of water required;

[0068] 2) Preparation of alkali-activated fly ash retarding binder:

[0069] Slowly add the weighed solid NaOH particles into the weighed water, and after stirring evenly, place it in a constant temperature and humidity chemical laboratory at room temperature for 24 hours to obtain a base activator solution with a relatively stable internal group composition;

[0070] After wetting the blades of the agitator and the mixing pot with a wet rag, pour the weighed fly ash and conductive steel wool fiber into the ...

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Abstract

The invention discloses an alkali-activated low-calcium cementing material delayed coagulation agent based on an electromagnetic induction heating delayed coagulation mechanism. The alkali-activated low-calcium cementing material delayed coagulation agent comprises the following components in parts by weight: 400-500 parts of a low-calcium cementing material, 1300-1400 parts of aggregate, 80-160 parts of an exciting agent, 15-20 parts of a magnetocaloric component, 0-30 parts of a delayed coagulation component and 150-200 parts of water. Magnetocaloric components are introduced into an alkali-activated low-calcium cementing material mortar system, and an electromagnetic heating means is combined to realize controllable adjustment of the coagulation rate and the curing time; when the slow-setting mortar is applied to preparation of the slow-setting prestressed reinforcement, the slow-setting mortar is good in fluidity before and after tensioning, can better wrap the slow-setting prestressed reinforcement, is excellent in bonding strength after hardening, and can effectively solve the problem that after traditional slow-setting mortar is tensioned, cavities are prone to occurring. The preparation method is simple, convenient and controllable to operate, low in cost and suitable for popularization and application.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to an alkali-activated low-calcium gelling material slow-setting binder based on an electromagnetic induction heating coagulation adjustment mechanism, and a preparation method and application thereof. Background technique [0002] Slow bonding prestressing technology is a new type of prestressing technology developed rapidly after non-bonding and bonded prestressing technology. In recent years, due to its simple construction process, excellent mechanical properties and durability, it has been more and more widely used in the field of engineering construction. The core technology of slow-bonding prestressing is the development of slow-bonding materials. Delayed bonding prestressed steel bars usually need to use special slowed bonding materials, which are different from special lubricating grease for unbonded prestressed steel bars and post-grouting materials ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/02C04B28/08C04B40/02E04C5/08
CPCC04B28/021C04B28/02C04B28/08C04B40/0263C04B40/0209E04C5/08C04B2111/00525C04B14/06C04B22/062C04B14/48Y02P40/10
Inventor 唐佩蒋事成陈伟袁波
Owner WUHAN UNIV OF TECH
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