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Thermal-insulation mortar

A technology of thermal insulation mortar and absorbent, which is applied in the field of building materials, can solve the problems of low strength, no electromagnetic wave absorption effect, reduce the strength of thermal insulation mortar, etc., and achieve the effect of wide absorption range

Active Publication Date: 2013-12-25
ANFANG HI TECH ELECTROMAGNETIC SAFETY TECHN BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the frequency bands targeted by the existing technologies are all below 18GHz, and there is no mention of the absorption effect of higher frequency electromagnetic waves
In addition, most of the absorbents used are carbon-based materials, such as conductive graphite, carbon black, etc. As absorbents, these materials have low strength and high thermal conductivity. At the same time, thermal insulation mortar is a light material, which has strict restrictions on dry density, and the general requirement is 400kg / m 3 Below, if the amount of absorbent added is too high, it will inevitably increase the dry density of the thermal insulation mortar

Method used

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Experimental program
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Effect test

Embodiment 1

[0031] Add nickel zinc ferrite, 425 ordinary silicon cement, gray calcium, vitrified microspheres, polypropylene fiber, redispersible latex powder, hydroxypropyl methylcellulose and starch ether into the mortar mixer, mix well, Obtain the thermal insulation mortar of this embodiment. Among them, the quality of each component is as follows: nickel zinc ferrite 0.182kg, 425 ordinary silicon cement 2.6kg, ash calcium 1.1kg, vitrified microspheres 6kg, polypropylene fiber 0.03kg, redispersible latex powder 0.1kg, hydroxyl Propyl methyl cellulose 0.02kg and starch ether 0.002kg. The dry density of the insulation mortar is 377g / cm 3 , The thermal conductivity is 0.078W / (m·K). Add water to the thermal insulation mortar of this embodiment and stir it into a slurry, make a 4cm thick sample, and measure the wave-absorbing properties of its 2-18GHz frequency band and 26.5-40GHz frequency band, respectively as figure 1 and figure 2 shown.

Embodiment 2

[0033]Add magnesium zinc ferrite, 425 ordinary silicon cement, fly ash, vitrified microspheres, expanded perlite, polypropylene fiber, redispersible latex powder, hydroxypropyl methylcellulose and starch ether to the mortar mixer In, mix evenly, obtain the insulation mortar of this embodiment. Among them, the quality of each component is as follows: magnesium zinc ferrite 0.746kg, 425 ordinary silicon cement 3.84kg, fly ash 1.54kg, vitrified microspheres 7.1kg, expanded perlite 1.57kg, polypropylene fiber 0.031kg, recyclable Dispersible latex powder 0.12kg, hydroxypropyl methylcellulose 0.03kg and starch ether 0.003kg. The dry density of the insulation mortar is 383g / cm 3 , The thermal conductivity is 0.081W / (m·K). Add water to the thermal insulation mortar of this embodiment and stir it into a slurry, make a 4cm thick sample, and measure the wave-absorbing properties of its 2-18GHz frequency band and 26.5-40GHz frequency band, respectively as figure 1 and figure 2 shown....

Embodiment 3

[0035] Add nickel zinc ferrite, 425 ordinary silicon cement, gray calcium, fly ash, vitrified microspheres, expanded perlite, polypropylene fiber, redispersible latex powder, hydroxypropyl methylcellulose and starch ether In the mortar mixer, mix evenly, obtain the insulation mortar of this embodiment. Among them, the quality of each component is as follows: nickel-zinc ferrite 0.2kg, 425 ordinary silicon cement 9.9kg, ash calcium 0.3kg, fly ash 1.84kg, vitrified microspheres 3.81kg, expanded perlite 3.22kg, polypropylene fiber 0.196kg, 0.4kg of redispersible latex powder, 0.1kg of hydroxypropyl methylcellulose and 0.01kg of starch ether. The dry density of the insulation mortar is 394g / cm 3 , The thermal conductivity is 0.083W / (m·K). Add water to the thermal insulation mortar of this embodiment and stir it into a slurry, make a 4cm thick sample, and measure the wave-absorbing properties of its 2-18GHz frequency band and 26.5-40GHz frequency band, respectively as figure 1 a...

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Abstract

The invention discloses thermal-insulation mortar. The thermal-insulation mortar consists of the following components in percent by mass: 1%-5% of an absorbent, 25%-50% of cement, 10%-30% of filler, 35%-60% of lightweight aggregates, 0.2%-1% of a reinforced fiber and 1%-4% of organic auxiliaries. The thermal-insulation mortar disclosed by the invention has a wide wave-absorbing range, and has good absorbing effect on electromagnetic waves within a range of 26.5 GHz-40 GHz in addition to the range of 2 GHz-18 GHz.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a thermal insulation mortar which has the function of absorbing electromagnetic waves. Background technique [0002] Energy saving and environmental protection is one of the basic national policies of our country. Therefore, the country is promoting environmental protection and energy saving requirements for buildings. In order to meet the relevant energy saving standards, buildings generally need to be constructed with insulation layers. The traditional thermal insulation materials are expanded polystyrene board, extruded polystyrene board and foamed polyurethane, etc. Although their thermal conductivity is small and their thermal insulation performance is excellent, as an organic thermal insulation material, their fire performance is poor. In recent years, my country has experienced There have been many serious fires caused by the ignition of organic thermal insulation material...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B14/30
Inventor 刘斌房非拉商红凯马占义于天荣郭林
Owner ANFANG HI TECH ELECTROMAGNETIC SAFETY TECHN BEIJING
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