CN102561603A - Heat-insulating and water-proofing roof - Google Patents

Abstract

A heat-insulating and water-proofing roof comprises a reinforced concrete structure layer and further comprises an adhesive layer and a heat-insulating and water-proofing layer, wherein the heat-insulating and water-proofing layer is made of an aerogel nano-pore super-insulation flexible felt, the adhesive layer is covered on the upper surface of the reinforced concrete structure layer, and the heat-insulating and water-proofing layer is paved on the upper surface of the adhesive layer. According to the heat-insulating and water-proofing roof provided by the invention, the heat insulation performances are excellent, the construction is convenient, the material is saved, and the self-weight of the roof is reduced.

Description

A thermal insulation and waterproof roof

technical field

The invention relates to a building roof structure.

Background technique

At present, the roof made by the construction industry, that is, the top surface structure of the house, is that the insulation layer is located above the reinforced concrete structure layer, and a waterproof layer is made on the insulation layer. This structure is not only cumbersome in construction, wastes materials, slow in construction speed, and increases its own weight; moreover, because this structure does not comprehensively consider the two functions of waterproof and heat insulation, the two functions are separated and considered separately. Considering the cross influence between the two, the effect is not ideal. An insulation layer is set under the waterproof layer, so that the energy obtained by the solar radiation absorbed by the waterproof layer during the day cannot be transmitted downward in time, causing the temperature of the waterproof layer to rise sharply during the day and drop at night, and the waterproof layer is always in a state of severe thermal expansion and cold contraction, seriously The durability of the waterproof layer is affected, and the waterproof layer is easily damaged. Rain leakage has become a common phenomenon for the top-floor residents, seriously affecting the quality of life of the top-floor residents. Installing a waterproof layer on top of the insulation layer does not take into account that the main source of roof energy comes from solar radiation rather than heat conduction between the air and the roof interface; although, setting an insulation layer under the waterproof layer can increase the upper surface temperature of the waterproof layer and increase the waterproof layer The heat released by the long-wave radiation prevents the high temperature of the waterproof layer from quickly transferring to the structural layer. However, due to the existence of the waterproof layer, the waterproof layer is in a high temperature state under solar radiation during the day, that is to say, the temperature of the top surface of the insulation layer is always in a high temperature state during the day; however, any insulation material can only reduce the speed of heat transfer, but There is no way to prevent the transfer of heat from a high temperature object to a low temperature object. Therefore, setting the insulation layer under the waterproof layer can reduce the transfer of certain heat to the structural layer, but it cannot fundamentally change the hot summer situation of the residents on the top floor. At the same time, due to the laying of the insulation layer, the waterproof layer is easily damaged, and the damage of the waterproof layer also causes the insulation layer to be easily damaged, thereby affecting the thermal insulation performance of the insulation layer. Therefore, roof insulation and waterproofing have become a technical problem at present, and rain leakage on the top floor and high temperature in summer have become common phenomena, seriously affecting the quality of life of residents on the top floor, and making the top floor a target for slow sales of real estate buildings.

Contents of the invention

In order to overcome the deficiencies of existing building roofs, such as easy damage to the waterproof layer, poor thermal insulation performance, cumbersome construction, waste of materials, and high self-weight, the present invention provides a roof with good thermal insulation performance, convenient construction, material saving, and low self-weight. Thermal insulation and waterproof roof.

The technical solution adopted by the present invention to solve its technical problems is:

A thermal insulation and waterproof roof, comprising a reinforced concrete structure layer, said thermal insulation and waterproof roof also includes a binder layer and a thermal insulation and waterproof layer made of airgel nanoporous super thermal insulation flexible felt, said The upper surface of the reinforced concrete structure layer covers the adhesive layer, and the upper surface of the adhesive layer is laid with a thermal insulation and waterproof layer.

The technical idea of the present invention is to use the airgel nanoporous super heat insulating flexible felt with heat insulation, heat preservation and waterproof performance as the heat insulation, heat preservation layer and waterproof layer of the roof.

Airgel nanoporous super heat-insulating flexible felt is made of nano-silica airgel as the main material and compounded by a special process. It mainly has the following advantages: 1. High temperature resistance and small thermal conductivity. The long-term maximum operating temperature is 400°C, and the change of thermal conductivity with time is shown in Figure 2. At 25°C, the thermal conductivity is ≤0.018W/(m·K). 2. The unique three-dimensional network structure of airgel avoids the phenomenon of sintering deformation and particle accumulation of thermal insulation performance of other thermal insulation materials caused by long-term high temperature or vibration. 3. It has good flexibility and tensile strength, which can resist the internal stress caused by stretching during construction and linear shrinkage during alternating cold and heat. 4. It is composed of inorganic materials and does not contain substances harmful to the human body. The leached chlorine ion content is extremely small, and it does not corrode equipment and pipelines. 5. It can play the functions of sound absorption and noise reduction, buffering vibration, etc., improving environmental quality and protecting equipment. 6. The density of the product is lower than 200kg/m ³ , light and convenient, easy to cut, and high in construction efficiency.

The beneficial effects of the present invention are mainly manifested in: (1), because the thermal conductivity of the airgel nanoporous super heat-insulating flexible felt is very small, when the airgel nanoporous super heat-insulating flexible felt receives solar radiation, the temperature of the upper surface of the flexible felt It cannot be passed down in time, and the temperature on the upper surface of the flexible felt rises sharply. Because the radiation ability E _b of the black body: that is, the total energy of all wavelengths radiated from the surface of the black body to the outside per unit time (W/m ² ), obeys the Stephen-Boltzmann law:

${\mathrm{<span\; class="notranslate">\; E.</span>}}_{\mathrm{<span\; class="notranslate">\; b</span>}}<span\; class="notranslate">\; =</span>{\mathrm{<span\; class="notranslate">\; \&sigma;</span>}}_{\mathrm{<span\; class="notranslate">\; 0</span>}}{\mathrm{<span\; class="notranslate">\; T</span>}}^{\mathrm{<span\; class="notranslate">\; 4</span>}}<span\; class="notranslate">\; =</span>{\mathrm{<span\; class="notranslate">\; C</span>}}_{\mathrm{<span\; class="notranslate">\; 0</span>}}{<span\; class="notranslate">\; (</span>\frac{\mathrm{<span\; class="notranslate">\; T</span>}}{\mathrm{<span\; class="notranslate">\; 100</span>}}<span\; class="notranslate">\; )</span>}^{\mathrm{<span\; class="notranslate">\; 4</span>}}$

E _b and T- are the radiation power of the black body (W/m ² ) and the absolute temperature of the surface, K, respectively.

σ ₀ (or c ₀ )-the emissivity coefficient of a black body, its value is 5.67×10 ^-8 (or 5.67/m ² ·K ⁴ )

Obviously, thermal radiation is extremely sensitive to temperature.

Therefore, the airgel nanoporous super heat-insulating flexible felt can greatly increase the long-wave radiation heat release on the top surface of the roof panel, so that the solar short-wave radiation energy absorbed by the top of the roof panel can be released in time.

(2) Because the airgel nanoporous super heat-insulating flexible felt has the characteristics of hydrophobicity, it has good waterproof performance.

(3) Since the airgel nanoporous super thermal insulation flexible felt is flexible, even if the structural layer cracks, it is not easy to cause the airgel nanoporous super thermal insulation flexible felt to break, affecting the airgel nanoporous super thermal insulation flexibility The thermal insulation and waterproof performance of felt.

(4) Since the airgel nanoporous super heat-insulating flexible felt itself is green, non-toxic and non-corrosive, the roof system as a whole also has a good performance of green and environmental protection.

(5) At the same time, it can save material consumption and improve space utilization;

(6) The material itself is lighter and more convenient for construction.

Description of drawings

Figure 1 is a structural diagram of a thermal insulation and waterproof roof.

Fig. 2 is a schematic diagram of the variation of thermal conductivity with time.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings.

Referring to Fig. 1, a thermal insulation and waterproof roof includes a reinforced concrete structure layer 3, and the thermal insulation and waterproof roof also includes a binder layer 2 and a thermal insulation layer made of airgel nanoporous super thermal insulation flexible felt. The thermal insulation and waterproof layer 1, the upper surface of the reinforced concrete structure layer 3 covers the adhesive layer 2, and the upper surface of the adhesive layer 2 is laid with the thermal insulation and waterproof layer 1.

The invention has a layered structure, including a thermal insulation and waterproof layer 1, an adhesive layer 2 and a reinforced concrete structure layer 3 made of airgel nanoporous super thermal insulation flexible felt.

During construction, first pour the concrete structure layer 3 according to a certain slope, then apply a certain amount of adhesive on the structure layer to form the adhesive layer 2, and finally lay airgel on the adhesive layer 2 Nanoporous super thermal insulation flexible felt 1 is sufficient.

Claims (1)

1. heat-proof insulation waterproof roofing; Comprise the reinforced concrete structure layer; It is characterized in that: said heat-proof insulation waterproof roofing also comprises adhesive layer and is the heat-proof insulation waterproof layer of material with aeroge nano-pore superinsulation flexible mat; The upper surface of said reinforced concrete structure layer covers said adhesive layer, and the upper surface of said adhesive layer is laid the heat-proof insulation waterproof layer.

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