CN100379702C - A thermal insulation mortar and its construction method in radiant floor heating - Google Patents

Abstract

The invention is a mortar with thermal insulation performance, and its components are: cement, inorganic thermal insulation material, redispersible latex powder, composite fiber, methyl cellulose ether, water reducer, air-entraining agent; The construction method in the floor radiant heating is: leveling with cement mortar first, and then laying the insulation layer, the insulation layer includes the insulation layer and the reflection film; Composite a layer of reflective film, embed a heating coil with hot water on the reflective film in the pipe groove, and fix the heating coil and the insulation layer together with plastic staples. The thermal insulation coefficient of the thermal insulation mortar of the present invention is about 0.058W/m.k. Compared with concrete, the thermal insulation performance has been improved by nearly 30 times, and the investment of the floor radiant heating system has been reduced as a whole. Therefore, the present invention is the same as the existing Compared with other technologies, it has outstanding substantive features and significant technological progress, and has a high application prospect.

Description

A thermal insulation mortar and its construction method in radiant floor heating

technical field

The invention relates to a kind of engineering mortar and its application method, in particular to the mortar with thermal insulation performance, specifically a kind of thermal insulation mortar, and discloses its construction method in floor radiant heating.

Background technique

With the rapid development of the national economy and the continuous improvement of the living standards of urban people, people have higher requirements for the quality of the indoor environment, that is, fresh and hygienic air, comfortable and pleasant temperature, etc., coupled with the adjustment of energy structure, building energy conservation and household With the implementation of the metered heating charging system, a new heating method - low-temperature hot water floor radiant heating was born. Low-temperature hot water floor radiant heating is a heating system in which hot water pipes (heating coils) are buried in the ground inside the room. The system uses the entire ground as a heat dissipation surface. While the floor heats the surrounding air through convective heat exchange, it also conducts radiation heat exchange with the surrounding enclosure structures and human body to achieve the heating effect. 50% of the amount. According to the heating needs of the human body, the ideal indoor temperature should be "warm the feet and cool the roof" advocated by traditional Chinese medicine. Modern medicine has also proved that the feet have fewer capillaries and blood circulation is not as good as other parts of the body, especially when the temperature of the feet is low. People's whole body will feel cold, and if this happens for a long time, blood pressure will rise accordingly, and other diseases will also occur. Radiation heat dissipation is the best heating method. The indoor surface temperature is uniform, and the room temperature gradually decreases from bottom to top, giving people a good feeling of warming the feet and cooling the head. It does not cause convection of dirty air, and the room is very clean. Thus forming a thermal environment that truly meets the heat dissipation requirements of the human body, improves blood circulation, promotes metabolism, and has an inhibitory effect on cardiovascular diseases; it is especially suitable for the elderly and children, and has a more preventive effect on patients with arthritis and old cold legs; in addition, Since the radiator and its branch pipes are canceled in the room, the usable area is increased, which is convenient for decoration and furniture arrangement. The heating coil is buried in the concrete on the ground. If there is no artificial damage, the service life is more than 50 years, and it does not corrode or scale. It greatly reduces the annoyances caused by the running, running, dripping, water leakage and maintenance of the radiator to the residents, and can save maintenance costs.

At present, in terms of the laying of the floor panel structure, the commonly used form in the project is the landfill method, also known as the traditional wet method, that is, the cement mortar is used to level the base of the reinforced concrete floor slab, and then the insulation layer is laid. The insulation layer includes heat insulation. Layer and reflective film, pave high-density foamed or extruded foam plastic board with a thickness of not less than 20mm as the heat insulation layer, compound a layer of aluminum foil on the top of the board as the reflective film, and pave the heating coil with hot water on the aluminum foil layer , and use plastic staples to fix the heating coil and the insulation layer together, and finally pour 40-60mm thick bean stone concrete as the filling layer, and lay floor tiles, granite slabs or wood on the filling layer for the ground decoration layer according to the user's requirements. floor etc. This approach has many advantages of its own, but its shortcomings and limitations have also been seen in engineering practice, which hinders its popularization and application to a certain extent. For example: maintenance is difficult; the initial investment is high; the load of the slab structure is increased for high-rise buildings; wooden floors are used in many home decorations, and the laying of keels is limited;

At present, in actual engineering, it is found that the initial investment of the floor radiant heating system is relatively high, which is roughly equivalent to more than twice that of the conventional radiator convection heating system, thus restricting the development of floor heating. Quite a proportion. Therefore, someone proposed an economical floor heating mode, and adopted a series of technical measures such as canceling the aluminum foil layer (reflective film), not setting up an insulating layer (polystyrene board) between floors, and reducing the thickness of the buried pipe layer, so as to reduce part of the initial investment. the goal of. However, under the circumstances that our country vigorously promotes building energy conservation and advocates household heat metering, it is necessary to reduce heat transfer between households and lay a thermal insulation layer. In addition, as the main measure to prevent the heating coil from dissipating heat downward, if the insulation layer is removed, it will be more difficult to calculate the heat load of the room. However, using polystyrene board as a thermal insulation layer has unstable physical and chemical properties, and it emits harmful gas itself. Aluminum foil is used as a reflective film, and its combination with the heat insulating layer is not reliable.

Contents of the invention

In order to solve the above-mentioned problems existing in the current floor radiant heating, the present invention provides a kind of thermal insulation mortar, and discloses its construction method in the floor radiant heating.

The present invention adopts the following technical scheme: a thermal insulation mortar whose components and proportions are calculated by weight as follows:

Cement: 30%-65%, inorganic thermal insulation material: 30%-65%, redispersible latex powder: 2%-6%, composite fiber: 0.01%-0.5%, methyl cellulose ether: 0.1 %-0.5%, water reducer: 0.1%-0.5%, air-entraining agent: 0.005%-0.05%; among them, the composite fiber is composed of tensile fiber, PP fiber and wood fiber, and its weight percentage is: tensile fiber 20 %-40%, PP fiber 30%-50%, wood fiber 20%-40%.

The above-mentioned inorganic thermal insulation material can be expanded perlite or vitrified microbeads.

The preparation process of the above-mentioned composite fiber is as follows: First, put the tensile-resistant fiber in the above proportion in the mixing equipment and stir it fully to make it fully puffed, then add the PP fiber in the above proportion into the mixing equipment and stir fully to make it fully puffed Finally, add the wood fiber in the above ratio into the mixing equipment and stir it fully to make it fully puffed, and the composite fiber is made.

The preparation method of the above thermal insulation mortar is as follows: Weigh the components according to the aforementioned ratios, firstly mix the cement and the composite fiber evenly, and then add redispersible latex powder, methyl cellulose ether, inorganic thermal insulation The heat insulation material and the air-entraining agent are mixed evenly again to obtain the thermal insulation mortar of the present invention.

The construction method of the above thermal insulation mortar in the radiant floor heating is as follows: level the base layer of the reinforced concrete floor with cement mortar, and then lay the thermal insulation layer, which includes a thermal insulation layer and a reflective film; lay the above thermal insulation layer with a thickness of 20mm-40mm. The thermal mortar is used as the heat insulation layer, and there is a pipe groove on the heat insulation layer, and a layer of reflective film is compounded on the upper part of the heat insulation layer. A heating coil with hot water is embedded on the reflective film in the pipe groove, and the heating coil is fixed with plastic staples. Fastened together with the insulation layer.

The reflective film can be aluminum foil.

In order to increase the reliability of the combination between the reflective film and the heat insulating layer, and improve the reflective performance of the reflective film, the present invention also provides a new reflective material that can be used as a reflective film, and its components and proportions are as follows by weight: 50-70 mesh mica and/or 300-400 mesh kaolin 70%-80%, 70-100 mesh quartz sand 2%-3%, cement 10%-20%, fiber 4%-7 %, redispersible latex powder 3% - 7%.

Mix the above-mentioned dry powder with water and spread it on the heat insulation layer.

The invention replaces the traditional polystyrene board as the heat insulation layer material through the selection of the heat insulation layer material, realizes the green environmental protection and non-toxic construction, avoids various disadvantages of the polystyrene board as the heat insulation layer, and its strength can reach the polystyrene board 3-4 times; at the same time, set up a pipe groove on the heat insulation layer and embed the heating coil in it. On the one hand, it is convenient for the positioning of the heating coil. Cutting corners and materials, in addition, it also facilitates the maintenance work; the thermal insulation coefficient of the thermal insulation mortar of the present invention is about 0.058W/m.k, compared with concrete (the thermal insulation coefficient is about 1.74W/m.k), the thermal insulation performance has improved nearly 30 times , so the floor structure load of high-rise buildings can be greatly reduced; and a new reflective material is introduced, which increases the reliability of the combination between the reflective film and the heat insulation layer, improves the reflective performance of the reflective film, and reduces overall Therefore, compared with the prior art, the present invention has outstanding substantive features and remarkable technical progress, and has very high application prospects.

Detailed ways

Embodiment 1: A kind of thermal insulation mortar, its component and proportioning are by weight:

Cement: 32.89%, inorganic thermal insulation material: 65%, redispersible latex powder: 2%, composite fiber: 0.01%, methyl cellulose ether: 0.1%, water reducing agent: 0.1%, air-entraining agent: 0.005%; Wherein, composite fiber is composed of tensile fiber, PP fiber and wood fiber, and its percentage by weight is: 20% of tensile fiber, 50% of PP fiber, 30% of wood fiber.

The above-mentioned inorganic thermal insulation material is modified expanded perlite.

The redispersible latex powder is made of ethylene/vinyl acetate/vinyl chloride co-homopolymer powder.

The superplasticizer is a high-efficiency water-reducer, that is, a melamine-based high-efficiency water-reducer.

The air-entraining agent is selected from acrylic epoxy resin synthetic air-entraining agent for concrete, that is, SB-G concrete air-entraining agent.

The construction method of the above thermal insulation mortar in the radiant floor heating is as follows: level the base layer of the reinforced concrete floor with cement mortar, and then lay the thermal insulation layer. The thermal mortar is used as the heat insulation layer, and there is a pipe groove on the heat insulation layer, and a layer of reflective film is compounded on the upper part of the heat insulation layer. A heating coil with hot water is embedded on the reflective film in the pipe groove, and the heating coil is fixed with plastic staples. Fastened together with the insulation layer.

The present invention also provides a new reflective material that can be used as a reflective film. Its components and proportions are by weight: 70% of 50-order mica, 3% of 70-order quartz sand, 20% of cement, and 4% of fiber. Disperse latex powder 3%. Dispersible latex powder and fibers are the same as above.

Mix the above-mentioned dry powder with water and spread it on the heat insulation layer.

Embodiment 2: A kind of thermal insulation mortar, its component and proportioning are by weight:

Cement: 65%, inorganic thermal insulation material: 30%, redispersible latex powder: 5.89%, composite fiber: 0.01%, methyl cellulose ether: 0.1%, water reducer: 0.1%, air-entraining agent: 0.005%; Wherein, composite fiber is composed of tensile fiber, PP fiber and wood fiber, and its percentage by weight is: 40% of tensile fiber, 40% of PP fiber, 20% of wood fiber.

The above-mentioned inorganic thermal insulation material is vitrified microspheres.

The redispersible latex powder is made of ethylene/vinyl acetate copolymer powder.

The superplasticizer is a high-efficiency water-reducer, that is, a melamine-based high-efficiency water-reducer.

The air-entraining agent is SK-H air-entraining agent.

The construction method of the above thermal insulation mortar in the radiant floor heating is as follows: level the base layer of the reinforced concrete floor with cement mortar, and then lay the thermal insulation layer. The thermal mortar is used as the heat insulation layer, and there is a pipe groove on the heat insulation layer, and a layer of reflective film is compounded on the upper part of the heat insulation layer. A heating coil with hot water is embedded on the reflective film in the pipe groove, and the heating coil is fixed with plastic staples. Fastened together with the insulation layer.

The present invention also provides a new reflective material that can be used as a reflective film. Its components and proportions are by weight: 80% of 300 mesh kaolin, 2% of 100 mesh quartz sand, 10% of cement, and 4% of fiber. Disperse latex powder 4%. Dispersible latex powder and fibers are the same as above.

Mix the above-mentioned dry powder with water and spread it on the heat insulation layer.

Embodiment 3: A kind of thermal insulation mortar, its component and proportioning are by weight:

Cement: 50%, inorganic thermal insulation material: 45.35%, redispersible latex powder: 4%, composite fiber: 0.1%, methyl cellulose ether: 0.5%, water reducer: 0.1%, air-entraining agent: 0.05%; Wherein, composite fiber is composed of tensile fiber, PP fiber and wood fiber, and its percentage by weight is: 30% of tensile fiber, 40% of PP fiber, 30% of wood fiber.

The above-mentioned inorganic thermal insulation material is vitrified microspheres.

The redispersible latex powder is polyvinyl acetate homopolymer powder.

The superplasticizer is a high-efficiency water-reducer, that is, a melamine-based high-efficiency water-reducer.

The air-entraining agent is SJ type air-entraining agent.

The construction method of the above thermal insulation mortar in the radiant floor heating is as follows: level the base layer of the reinforced concrete floor with cement mortar, and then lay the thermal insulation layer. The thermal mortar is used as the heat insulation layer, and there is a pipe groove on the heat insulation layer, and a layer of reflective film is compounded on the upper part of the heat insulation layer. A heating coil with hot water is embedded on the reflective film in the pipe groove, and the heating coil is fixed with plastic staples. Fastened together with the insulation layer.

This embodiment provides a kind of new reflective material that can be used as reflective film, and its component and proportioning are by weight: 50 order mica and 400 order kaolin 75%, 80 order quartz sand 2%, cement 15%, fiber 3%, dispersible latex powder 5%. Dispersible latex powder and fibers are the same as above. Mica and kaolin are mixed in any ratio between 0-100% and excluding the two extremes of 0 and 100.

Mix the above-mentioned dry powder with water and spread it on the heat insulation layer.

The cement in the above-mentioned embodiments is selected from rapid-hardening sulfoaluminate cement with a strength of 52.5 strength grade.

Claims (3)

1. heat insulating mortar, it is characterized in that: its component and proportioning are by weight:

Cement: 30%-65%, inorganic heat preserving and heat insulation material: 30%-65%, redispersible latex powder: 2%-6%, conjugated fibre: 0.01%-0.1%, methyl cellulose ether: 0.1%-0.5%, water reducer: 0.1%-0.5%, air entrapment agent: 0.005%-0.05%; Wherein, conjugated fibre consists of anti-dimension, PP fiber and the xylon of towing, and its weight percent is: the anti-dimension 20%-40% that tows, PP fiber 30%-50%, xylon 20%-40%.

2. the constructional method of heat insulating mortar in floor radiation heating according to claim 1: earlier with cement mortar screeding, lay thermal insulation layer then in reinforced concrete floor basic unit, thermal insulation layer comprises thermal insulation layer and reflectance coating; It is characterized in that: the heat insulating mortar according to claim 1 of laying depth 20mm-40mm is as thermal insulation layer, have tube seat on the thermal insulation layer, the compound one deck reflectance coating in thermal insulation layer top, embed the heating coil that passes to hot water on the reflectance coating in tube seat, and heating coil and thermal insulation layer are fixed together with the plastics bail.

3. as the constructional method of heat insulating mortar in floor radiation heating as described in the claim 2, it is characterized in that: the component of reflectance coating and proportioning are by weight: 50 orders-70 purpose mica and/or 300 orders-400 purpose kaolin 70%--80%, 70 orders-100 purpose quartz sand 2%--3%, cement 10%--20%, fiber 4%--7%, redispersable latex powder 3%--7%.