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Microwave-excitation-based self-broken concrete as well as preparation method and application thereof

A self-shattering, concrete technology, applied in excavation, infrastructure engineering, construction, etc., can solve the problems of normal life interference of residents in the surrounding environment, low construction efficiency, noise and dust, etc., to reduce construction difficulty, low cost, time-saving effect

Inactive Publication Date: 2019-01-18
SHENYANG JIANZHU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The construction efficiency of the manual demolition method is low, and the other three methods will generate relatively large vibration, noise and dust during the demolition process, which will greatly interfere with the surrounding environment and the normal life of residents

Method used

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  • Microwave-excitation-based self-broken concrete as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A self-shattering concrete based on microwave excitation, including the following components according to the weight ratio: 250 parts of sulfur, 100 parts of Portland cement, 150 parts of fine aggregate, 350 parts of coarse aggregate, 10 parts of paraffin, and 30 parts of microwave absorber parts, 20 parts of mineral fillers. The measured density after mixing the aforementioned components is 1850kg / m 3 .

[0017] Among them, the coarse aggregate is perlite particles with a diameter of 10 mm to 40 mm without high temperature roasting, and the fine aggregate is perlite sand with a diameter of 0.1 mm to 5 mm without high temperature roasting. The microwave absorber is carbon nanotube fiber.

[0018] The above-mentioned preparation method of self-breaking concrete based on microwave excitation comprises the following steps:

[0019] Step 1: Weigh according to the above group distribution ratio;

[0020] Step 2: Stir the coarse aggregate, fine aggregate, Portland cement,...

Embodiment 2

[0025] A self-crushing concrete based on microwave excitation, including the following components according to weight ratio: 270 parts of sulfur, 110 parts of Portland cement, 160 parts of fine aggregate, 380 parts of coarse aggregate, 12 parts of paraffin, 40 parts of microwave absorber parts, 22 parts of mineral fillers. The measured density after mixing the aforementioned components is 1950kg / m 3 .

[0026] Among them, the coarse aggregate is perlite particles with a diameter of 10 mm to 40 mm without high temperature roasting, and the fine aggregate is perlite sand with a diameter of 0.1 mm to 5 mm without high temperature roasting. The microwave absorber is carbon nanotube fiber, and the mineral filler is silicon micropowder.

[0027] The preparation method and application of the above-mentioned microwave-excited self-breaking concrete are the same as those in Example 1.

Embodiment 3

[0029] A self-shattering concrete based on microwave excitation, including the following components according to weight ratio: 290 parts of sulfur, 120 parts of Portland cement, 170 parts of fine aggregate, 400 parts of coarse aggregate, 15 parts of paraffin, 45 parts of microwave absorber parts, 25 parts of mineral fillers. The measured density after mixing the aforementioned components is 2150kg / m 3 .

[0030] Among them, the coarse aggregate is perlite particles with a diameter of 10 mm to 40 mm without high temperature roasting, and the fine aggregate is perlite sand with a diameter of 0.1 mm to 5 mm without high temperature roasting. The microwave absorber is nano-silicon carbide fiber, and the mineral filler is fly ash.

[0031] The preparation method and application of the above-mentioned microwave-excited self-breaking concrete are the same as those in Example 1.

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Abstract

The invention relates to microwave-excitation-based self-broken concrete as well as a preparation method and application thereof. The concrete contains the following components in parts by weight: 250-300 parts of sulfur, 100-150 parts of Portland cement, 150-200 parts of fine aggregates, 350-500 parts of coarse aggregates, 10-20 parts of paraffin, 30-50 parts of a microwave absorbent and 20-30 parts of a mineral filler; and the density of the concrete is 1850kg / m<3>-2900kg / m<3> after being mixed and blended. By virtue of the interaction and cooperation of the components, the concrete has thecharacteristics of high strength, corrosion resistance, permeation resistance and high hardening speed of existing sulfur concrete and further has the advantages of lightness and high heated volume swelling speed of light aggregate concrete. The concrete is reasonable in design, low in cost and easy in preparation process. A component prepared from the concrete has good mechanical properties. Whenbeing dismounted, the component can be automatically cracked and broken under an external microwave field, so that the difficulty of dismounting construction is reduced, and the popularization and use are promoted.

Description

technical field [0001] The invention belongs to the technical field of concrete for building construction, and in particular relates to self-shattering concrete based on microwave excitation, a preparation method and an application thereof. Background technique [0002] With the rapid development of cities in our country, the above-ground space in cities is becoming more and more tense. A large number of high-rise and super high-rise buildings have emerged, and the establishment of supporting buildings such as multi-storey basements, underground tunnels, and commercial streets has led to an increasing number of deep foundation pit projects. The complexity of the surrounding environment of the building makes the internal support mainly in the form of reinforced concrete one of the main temporary support structures for deep foundation pit support. It has the advantages of high rigidity and small deformation, and can effectively control the deformation of the retaining structur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/36E02D17/04
CPCC04B28/36C04B2111/00258E02D17/04C04B7/02C04B24/36C04B14/18C04B14/026C04B18/08C04B14/062C04B14/4693
Inventor 郭超陆征然朱璧禾惠志婷
Owner SHENYANG JIANZHU UNIVERSITY
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