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Anti-crack concrete with wave absorbing function, and preparation method thereof

A technology of concrete and wave function, applied in the field of building materials, can solve the problems of reducing the durability of buildings, difficult to deal with and remediate, affecting the use of buildings, etc.

Active Publication Date: 2016-11-09
FUJIAN JIANGXIA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, cracks in concrete basement walls of high-rise buildings are common at present, which not only affects the use of buildings due to leakage, but also seriously reduces the durability of buildings, causing great difficulties for future treatment and remediation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] 1. The preparation of the absorbing material comprises the following steps:

[0065] 1) Load 1.2 parts by weight of BaFe 12 o 19 After the halloysite nanotubes and 0.5 parts by weight of methacryloxypropyltrimethoxysilane were stirred at room temperature for 2 hours, 10 parts by weight of polypropylene were added and stirred for 3 hours to form a mixture 1;

[0066] 2) Take 0.8 parts by weight of dielectric loss nanocomposite at room temperature, add 0.3 parts by weight of 3-(2,3-epoxypropoxy)propyltrimethoxysilane dropwise, stir for 1 h, and then add 10- After 15 parts by weight of polypropylene were stirred for 2 hours, 1.5-2 parts by weight of iron-doped zinc oxide nanomaterials were added, and 0.5 parts by weight of 3-(2,3-glycidyloxy)propyltrimethoxysilane was added dropwise, and stirred for 1.5 After h, the mixture 2 was prepared;

[0067]3) Put Mixture 1 and Mixture 2 together into a high-speed mixer, disperse at 300r / min for 3.5 hours; then raise the temperat...

Embodiment 2

[0074] 1. The preparation of the absorbing material comprises the following steps:

[0075] 1) Load 1.6 parts by weight of BaFe 12 o 19 After the halloysite nanotubes and 0.3 parts by weight of methacryloxypropyltrimethoxysilane were stirred at room temperature for 2 hours, 10 parts by weight of polypropylene were added and stirred for 3 hours to form a mixture 1;

[0076] 2) Take 1.2 parts by weight of dielectric loss nanocomposites at room temperature, add 0.3 parts by weight of 3-(2,3-epoxypropoxy)propyltrimethoxysilane dropwise, stir for 1 hour, then add 15 parts by weight After 2 parts of polypropylene were stirred for 2 hours, 1.5 parts by weight of iron-doped zinc oxide nanomaterials were added, and 0.2 parts by weight of 3-(2,3-glycidyloxy)propyltrimethoxysilane was added dropwise, and after stirring for 1.5 hours, the preparation Mixture 2 is obtained;

[0077] 3) Put Mixture 1 and Mixture 2 together into a high-speed mixer, and disperse at 350 r / min for 2 hours; t...

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Abstract

The invention relates to a crack-resistant concrete with a wave absorbing function and a preparation method thereof, and belongs to the field of building materials. The anti-crack concrete comprises 2.0-3.0 kg / m<3> of a reducing toughening agent, 2.0-3.0 kg / m<3> of a wave absorbing material, 135-155 kg / m<3> of water, 320-380 kg / m<3> of cement, 20-40 kg / m<3> of fly ash, 600-800 kg / m<3> of fine aggregate, 950-1150 kg / m<3> of coarse aggregate, 10-20 kg / m<3> of an inner curing agent, 3.0-3.5 kg / m<3> of a water reducing agent, 40-50 kg / m<3> of steel fibers, 2-2.4 kg / m<3> of triethanolamine, and 0.5-1 kg / m<3> of sodium gluconate. According to the present invention, the 28-day compressive strength of the concrete can achieve 30-60 Mpa, the anti-crack concrete can be obtained, and the bandwidth having the reflectivity of less than -7 dB is 10 GHz when the concrete is in the frequency range of 7-26 GHz.

Description

technical field [0001] The invention relates to a crack-resistant concrete with wave-absorbing function and a preparation method thereof, belonging to the field of building materials. Background technique [0002] At present, as the fourth largest global environmental problem after water pollution, air pollution and noise pollution, the harm of electromagnetic wave radiation is becoming more and more serious. Correspondingly, the electromagnetic wave radiation protection of various building facilities is also increasingly important. Especially the buildings adjacent to radars, microwave base stations, high-power wireless communication transmitters, etc., the functional buildings of scientific research institutes, hospitals, banks and other units with a large number of sophisticated electronic instruments inside, and the national defense and administrative buildings closely related to national security. The key building of the department, its electromagnetic wave protection ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B24/40
CPCC04B28/00C04B40/0042C04B2111/343C04B2201/50C04B18/08C04B14/48C04B24/121C04B24/10C04B14/02C04B2103/302C04B22/08C04B24/40C04B24/2611
Inventor 吴建国肖三霞
Owner FUJIAN JIANGXIA UNIV
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