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Preparation method of high-heating electric shock curing concrete structure

A technology for concrete structure and heat generation, which is applied to clay preparation devices, chemical instruments and methods, and manufacturing tools, etc., can solve the problems of waste of electric power resources, less research on the electric and heat performance of concrete structures, and limitation of the effect of electric excitation maintenance, etc., so as to save energy. The effect of construction cost, high curing temperature and shortened construction period

Pending Publication Date: 2022-04-26
HEBEI UNIV OF TECH
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Problems solved by technology

[0003] However, the current research on electro-induced curing concrete structures is mainly focused on the curing system, and there are few studies on the electrothermal performance of concrete structures themselves under electro-induced curing conditions.
However, the electrothermal properties of the concrete structure greatly affect its effect under the action of electro-excited curing. If the electro-thermal properties of electro-excited cured concrete structures cannot be studied to improve the heating efficiency of the structure, it is easy to cause waste of power resources. , limit the adverse effects such as electric shock curing effect

Method used

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  • Preparation method of high-heating electric shock curing concrete structure
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  • Preparation method of high-heating electric shock curing concrete structure

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preparation example Construction

[0025] The present invention provides a kind of preparation method (abbreviation method) of high-heat electric excitation curing concrete structure, it is characterized in that, this method comprises the following steps:

[0026] Step 1, preparation of dry material:

[0027] Mixing fine aggregate, non-conductive nanomaterials and conductive nanomaterials and fully stirring to obtain dry material A;

[0028] Mix the gelling material and the conductive filler and stir well to obtain the dry material B;

[0029] Preferably, in step 1, the fine aggregate includes at least one of standard sand, quartz sand, tailings sand or waste concrete aggregate, and the particle size of the fine aggregate is not greater than 2.5mm;

[0030] Preferably, in step 1, the non-conductive nanomaterial includes at least one of nano-silicon dioxide, nano-titanium dioxide, nano-calcium carbonate, nano-alumina or nano-aluminum nitride; more preferably, the non-conductive nano-material includes nano-scale...

Embodiment 1

[0056] (1) Preparation of dry material: mix standard sand, nano-silica and nano-carbon fiber and stir for 15 minutes to obtain dry material A; mix cement and carbon fiber and stir for 4 minutes to obtain dry material B;

[0057] (2) Preparation of non-conductive nanomaterial-modified concrete material: Mix dry material A and dry material B, stir slowly for 3 minutes, then stir quickly for 5 minutes until uniform, then add water and water reducer and stir quickly for 8 minutes until uniform, and get Non-conductive nanomaterials modified concrete materials;

[0058] The mass ratio of cement to standard sand is 1:1, nano-silica accounts for 0.8wt% of the cement mass, nano-carbon fiber accounts for 0.2vol% of the volume of the non-conductive nanomaterial-modified concrete material, and carbon fiber accounts for 0.2vol% of the volume of the non-conductive nano-material-modified concrete The volume of the material is 0.75vol%, the water-binder ratio is 0.3, and the water reducing ag...

Embodiment 2

[0062] It is exactly the same as Example 1, the difference is that nano-silica accounts for 0.4wt% of the mass of the gelled material.

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Abstract

The invention discloses a preparation method of a high-heat-generation electric shock curing concrete structure, which specifically comprises the following steps: mixing fine aggregate, a non-conductive nano material and a conductive nano material, and fully and uniformly stirring to obtain a dry material A; mixing the cementing material and the conductive filler, and fully and uniformly stirring to obtain a dry material B; mixing the dry material A and the dry material B, fully and uniformly stirring, adding water and a water reducing agent, and fully and uniformly stirring to obtain the non-conductive nano material modified concrete material; and preparing the non-conductive nano material modified concrete structure through electric excitation curing. The electric heating property development rule of the electric excitation curing concrete structure is fully considered, the heating efficiency of the concrete structure under the electric excitation curing effect can be remarkably improved by adding proper non-conductive nano materials into the structure, under the same power-on power, the curing temperature of the concrete with the high heating efficiency is higher, and the curing effect is better. The method is beneficial to development of mechanical properties and is suitable for rapid and high-quality construction of an electric excitation curing concrete structure.

Description

technical field [0001] The invention belongs to the technical field of civil engineering, in particular to a preparation method of a high-heat electric excitation curing concrete structure. Background technique [0002] Electric-induced curing is a new type of concrete structure maintenance method. This method uses the Joule heat generated in the concrete structure by the action of an alternating electric field to increase the curing temperature of the concrete structure. This method is easy to operate and can achieve different properties of concrete according to different environmental conditions. Construction of structures. For positive temperature environment, the use of electric excitation curing method can significantly shorten the maintenance period and reduce labor costs; for negative temperature environment, the use of electric excitation curing method can realize in-situ maintenance of concrete structures, greatly reduce the required cost, and promote Construction ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B40/02B28B1/14B28B11/24B28C5/00C04B14/06C04B14/30C04B14/28C04B14/32
CPCC04B40/0263C04B40/0209B28C5/003B28B1/14B28B11/245C04B14/06C04B14/305C04B14/28C04B14/303C04B14/326
Inventor 刘雨时马国伟王玲
Owner HEBEI UNIV OF TECH
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