What are the measuring instruments used for building insulation

Thermal insulation materials are divided into organic thermal insulation materials (polystyrene board, extruded plastic board, polyurethane and phenolic board, etc.) and inorganic thermal insulation materials (represented by rock wool), because of a serious fire in Shanghai, the state issued a document 65 in March to explicitly use only A-level thermal insulation materials, all of these organic materials can not be used, because there are almost no A-level thermal insulation materials in organic materials.

In this way, rock wool can only be used for insulation, but there are very few manufacturers of rock wool (not to mention those slag cotton, which cannot be made on the wall at all), and the output of domestic rock wool is not enough for a first-tier city. At the same time, the production of those manufacturers who make organic insulation materials has stopped, because organic materials are not allowed to be used.

What to do? If you want me to see, although the new standard document has not come out, but the possibility of changing to B1 level is very large, you think, if you use A-grade, what if the output can't keep up? If they all use A-grade, what should I do if the manufacturers of organic insulation materials have closed down and the workers are unemployed?

Therefore, organic insulation materials cannot be completely banned.

If the new standard is changed to B1 grade, then polystyrene board, extruded board, phenolic board, and polyurethane board can all reach B1 grade, but in addition to the phenolic board itself is B1 grade, other organic insulation materials must add a large number of flame retardants to make the foam reach B1 grade. After adding flame retardant, once a fire occurs, the flame retardant will volatilize, producing harmful gases, and there is also the possibility of combustion, but it is still much better than those inferior materials.

It should be said that it is a relatively safe insulation material on the market, and the thermal insulation performance is much better than that of rock wool, and the water absorption rate is not as high as that of rock wool, and it is environmentally friendly. However, it has a certain brittleness and is easy to lose powder, so if it is to be applied to exterior wall insulation, it is necessary to use first-class phenolic boards, such as the products produced by Xiamen Gaote in terms of quality advantages are more obvious. But there is a problem, the phenolic board is relatively high, I believe that with the development of the phenolic industry, a large number of manufacturers compete, can reduce the phenolic board.

At present, the commonly used (civil building) insulation materials are mainly as follows:

1. Insulation board, which is the most commonly used. Generally, there are polystyrene boards, extruded plastic boards, polyurethane boards, etc.;

2. Thermal insulation mortar, which is the cheapest, but the state has expressly restricted its use (note, not prohibited), and some small places are still using it;

3. Other new processes, such as: self-insulating masonry, spraying (coating) foam insulation layer and other testing items (see GB50411-2007 building energy saving code) I will take the most commonly used insulation board as an example, and the items that generally need to be sampled and retested are as follows:

1. a thermal insulation board.

2. Special adhesive mortar.

3. Special anti-crack (overlay) mortar.

4. Strengthen the mesh cloth.

5. an anchor bolt. 6. System pull-out test.

On March 15, 2011, China's public consumption regulations also required fire inspection.

At present, the most commonly used in civil buildings is polystyrene board, extruded plastic board, generally requires the bulk density of each cubic meter of benzene board to be more than 18kg, you go to buy materials when you also want to buy this kind of 18kg or more, first determine whether the design specifically points out the bulk density, if the design is higher, the design should be taken.

Second retest: The raw materials for the second retest of thermal insulation in on-site construction are gray glue, mesh cloth, and anchor bolts, and the benzene board itself can consider the bulk density, but the benzene board with special labeling must be required to be retested. Before the net is hung and the pasted material meets the periodic strength, find the monitoring station, the person in charge of the construction unit and the supervision department to determine the firmness of the benzene board (pull-out test).

Inspection: inspection shall be carried out after the completion of the construction of the wall or roof insulation sub-project (the following single wall insulation material inspection does not include the inspection batch of insulation wall masonry).

The inspection cover is attached to the "on-site construction materials inspection form", followed by the "construction unit materials, structural parts entry inspection form" and then attached to the raw material certificate, the copy of the raw material certificate is stamped with the acceptance seal of the entry material, and then the second retest report of raw materials and finished parts is attached. When reporting for inspection, the original and the copy shall be handed over to the supervision unit for review and signature, and then a copy of the supervision and construction unit shall be given, and the original shall be kept on file by its own unit.

Whether it is a manufacturer, a user, or a quality supervision department, if you want to judge whether the insulation material is qualified, you need to use special instruments and equipment to test, here are a few examples to illustrate.

1] For example, to test the tensile strength performance of insulation materials, you can choose a testing machine equipment according to the tensile force that can be borne by specific insulation materials, and the equipment parameters are briefly described as follows: Main uses: This machine is specially developed for various physical and chemical performance tests of composite mortar security system, polystyrene board thin plastering exterior wall insulation system, rigid polyurethane foam composite board exterior wall enclosure system and other exterior wall insulation systems and roof insulation materials.

Applicable standards for this machine:

JC T992-2006 "Expanded Polyethylene Board Adhesive for Wall Insulation".

JC T993-2006 "Expanded polyethylene board plastering paste for exterior wall insulation".

JC T547-2005 "Ceramic Floor Tile Adhesive".

JC T907-2002 "Concrete Interface Treatment Agent".

JC890-2001 "Masonry mortar and plastering mortar for autoclaved aerated concrete".

JG158-2004 "External Wall Thermal Insulation System of Rubber Powder Polystyrene Granules".

DBJ01-38-20025 "Technical Regulations for External Insulation Construction of External Walls - Polymer Cement Mortar Adhesive".

DBJ T01-50-2002 "Technical Regulations for External Thermal Insulation Construction of External Walls - Flexible Water-resistant Putty".

2. Technical parameters: Main technical parameters WDW-10 WDW-20 WDW-50 WDW-100 Maximum experimental force 10KN 20KN 50KN 100KN Measurement range 2%-100% of the maximum test force Accuracy level of the testing machine Level 1 Test force accuracy Better than the indicated value 1% Displacement measurement The resolution is Deformation accuracy Better than the speed regulation range 1-300mm min Experimental space 600mm (can be customized according to requirements) Stepless speed regulation AC servo motor and control system Test Space Adjustment Mechanism High-precision ball screw drive Appearance Comply with the national GB T2611 standard Experimental protection function Overload protection Safety protection device Limit protection Host size 720*490*1850 Host form Portal frame structure Weight Approx. 650kg Working Environment Room temperature -45 degrees, humidity 20%-80% [2] Similarly, it is necessary to test the compression resistance of the insulation material. A testing machine can be selected according to the pressure that can be withstood by the specific insulation material, and the equipment parameters are briefly described as follows:

3. Scope of application of equipment:

The liquid crystal digital pressure testing machine is suitable for compressive strength or compressive flexural testing of metallic and non-metallic materials such as wood-based panels, cement products, concrete, cartons, manhole covers, iron ore pellets, pipes, hollow bricks, stones, refractory materials, rubber bearings, red bricks, etc., and is an essential equipment for laboratories in highways, railways, bridges, buildings, building materials, colleges and universities, etc.

Testing criteria.

1. Apparent density (kg m3): The apparent density of the material affects its thermal conductivity to a certain extent, and the material with unqualified apparent density will directly lead to the decline of its physical properties, such as strength, dimensional stability, etc.

2. Thermal conductivity (w m?)Generally speaking, the laboratory test is tested when the plate is dried to constant weight, and the application of the material is used under the condition that the air contains a certain humidity, therefore, it should be multiplied by a certain coefficient when used; Alternatively, the material can be adjusted to the ambient conditions in which it will be used.

3. Dimensional change rate (mm): Materials with large dimensional change rate will lead to cracking of the surface layer of the system.

4. Compressive strength (MPa): refers to the compressive stress of the specimen under 10% deformation. It is related to the durability and impact resistance of the surface system.

5. Oxygen index: flame retardant type is required, otherwise the fire prevention cannot meet the standard.

6. Water vapor permeability coefficient [ng (pa?).m ?s)]: This performance determines the performance of water vapor permeability, and to a certain extent, determines the condensation of the wall.

You have found the right person, I am Zhongnuo Xiao [official]. We've been paying attention to this lately. I have also found a lot of information, but it is useless, this is only subject to the Sichuan Fire Research Institute of the Ministry of Public Security, recently got the news, the equipment of the Sichuan Fire Research Institute of the Ministry of Public Security has come out.

You can find information about them online.