Self-crushing concrete based on magnetocaloric excitation, preparation method and application thereof

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

Active Publication Date: 2018-12-28
上海隧港建筑材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The construction efficiency of the manual demolition method is low, and the other three methods will generate relatively large vibration, n

Method used

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  • Self-crushing concrete based on magnetocaloric excitation, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0016] Example 1

[0017] A self-crushing concrete based on magneto-thermal excitation, comprising the following components in a 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 wax, 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 that have not been roasted at high temperature, and the fine aggregate is perlite sand with a diameter of 0.1 mm to 5 mm that has not been roasted at a high temperature. The magnetic powder is manganese-zinc ferrite powder, and the mineral filler is fly ash.

[0019] The method for preparing self-crushing concrete based on magnetothermal excitation includes the following steps:

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

[0021] Step 2: Stir th...

Example Embodiment

[0025] Example 2

[0026] A self-crushing concrete based on magneto-thermal excitation, comprising the following components in a 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 wax, 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 that have not been roasted at high temperature, and the fine aggregate is perlite sand with a diameter of 0.1 mm to 5 mm that has not been roasted at a high temperature. Magnetic powder is Fe 3 O 4 Powder, mineral filler is silica powder.

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

Example Embodiment

[0029] Example 3

[0030] A self-crushing concrete based on magneto-thermal excitation, comprising the following components in a 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 wax, 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 that have not been roasted at high temperature, and the fine aggregate is perlite sand with a diameter of 0.1 mm to 5 mm that has not been roasted at a high temperature. The magnetic powder is manganese-zinc ferrite powder, and the mineral filler is fly ash.

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

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Abstract

The invention provides self-crushing concrete based on magnetocaloric excitation, and preparation method and application thereof. The self-crushing concrete contains, by weight, of the components of 250-300 parts of sulfur, 100-150 parts of Portland cement, 150-200 parts of fine aggregate, 350-500 parts of coarse aggregate, 10-20 parts of paraffin, 30-50 parts of magnetic powder and 20-30 parts ofmineral filler; the density is 2050-2850 kilograms per cubic metre after the components are mixed. With the coordination and synergy of the components, the self-crushing concrete based on the magnetocaloric excitation has the advantages of having not only the characteristics of high strength, corrosion resistance, penetration resistance and rapid setting of existing sulphur concrete but also theadvantages of light weight and rapid expansion of heat volume of lightweight aggregate concrete, and being reasonable in design, low in cost and simple in preparation process. Furthermore, members made of the concrete have the advantages of being good in mechanical properties and capable of self expanding and crushing under the action of an external alternating magnetic field during demolition, reducing the difficulty of demolition construction, and being suitable for popularization.

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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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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