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A self-shattering concrete based on magnetothermal excitation, its preparation method and its application

A self-shattering, concrete technology, applied in excavation, infrastructure engineering, construction, etc., can solve problems such as low construction efficiency, noise and dust, and large vibrations

Active Publication Date: 2021-05-11
上海隧港建筑材料有限公司
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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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  • A self-shattering concrete based on magnetothermal excitation, its preparation method and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A self-shattering concrete based on magneto-thermal excitation, including the following components according to weight ratio: 250 parts of sulfur, 100 parts of Portland cement, 150 parts of fine aggregate, 360 parts of coarse aggregate, 12 parts of paraffin, 35 parts of magnetic powder parts, 22 parts of mineral fillers. The measured density after mixing the aforementioned components is 2050kg / m 3 .

[0018] 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 magnetic powder is manganese zinc ferrite powder, and the mineral filler is fly ash.

[0019] The above-mentioned preparation method of self-shattering concrete based on magneto-thermal excitation comprises the following steps:

[0020] Step 1: Weigh according to the above group distribution ratio;

[0021] Step 2: Stir the coarse ...

Embodiment 2

[0026] A self-shattering concrete based on magneto-thermal excitation, comprising the following components by 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 magnetic powder parts, 22 parts of mineral fillers. The measured density after mixing the aforementioned components is 2150kg / m 3 .

[0027] 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. Magnetic powder is Fe 3 o 4 Powder, the mineral filler is silica powder.

[0028] The preparation method and application of the self-crushing concrete based on magnetothermal excitation are the same as those in Example 1.

Embodiment 3

[0030] A self-shattering concrete based on magneto-thermal 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 magnetic powder parts, 25 parts of mineral fillers. The measured density after mixing the aforementioned components is 2250kg / m 3 .

[0031] 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 magnetic powder is manganese zinc ferrite powder, and the mineral filler is fly ash.

[0032] The preparation method and application of the self-crushing concrete based on magnetothermal excitation are the same as those in Example 1.

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Abstract

A self-shattering concrete based on magneto-thermal excitation, preparation method and application thereof according to the present invention, each component of the concrete comprises: 250-300 parts of sulfur, 100-150 parts of Portland cement, and 150 parts of fine aggregate ~200 parts, 350~500 parts of coarse aggregate, 10~20 parts of paraffin, 30~50 parts of magnetic powder, 20~30 parts of mineral filler, the density after mixing is 2050~2850kg / m 3 . The mutual cooperation and synergy of various components makes the present invention not only have the characteristics of high strength, corrosion resistance, penetration resistance and quick setting of the existing sulfur concrete, but also have the advantages of light weight and fast volume expansion speed of lightweight aggregate concrete . The invention has reasonable design, low cost and simple preparation process. The components made of the concrete have good mechanical properties. When dismantling, the component can expand and crack by itself under the action of an external alternating magnetic field, which reduces the difficulty of dismantling and construction, and is suitable for popularization and use.

Description

technical field [0001] The invention belongs to the technical field of concrete for building construction, and in particular relates to self-crushing concrete based on magnetothermal 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 struc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D17/04C04B28/04
CPCC04B28/04E02D17/04C04B22/02C04B14/18C04B24/36C04B18/08C04B14/308C04B14/064
Inventor 陆征然郭超张茂胜于红梅
Owner 上海隧港建筑材料有限公司
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