This paper introduces the properties of vitrified micro-bead insulation mortar materials; compares the insulation performance difference between monolithic thermal insulation buildings and traditional thermal insulation buildings, and expounds the superiority of integral thermal insulation buildings in terms of thermal insulation and energy conservation.
Vitrified microbeads; urban cave dwellings; thermal insulation properties 1 vitrified microbeads thermal insulation mortar vitrified microbeads thermal insulation mortar main material vitrified microspheres are inorganic vitreous mineral materials, volcanic rock ore (rosin rock, black lava, pearl The rosin rock in the rock is crushed, sieved, and rapidly burned and vitrified at high temperature. The surface of the expanded particles is melted at an instant high temperature, and is freely closed against the surface tension between the holes. After cooling, an irregular spherical body product having a continuous vitrified and closed particle surface while maintaining a completely porous hollow structure is formed. Due to its special processing technology, the physical and chemical properties of vitrified microbeads are very stable, with light weight, heat insulation, high temperature resistance, anti-aging, low water absorption and other characteristics. It can replace fly ash floating beads and glass floating beads. , traditional expanded perlite, polystyrene particles and many other traditional lightweight aggregates are used in different products, is an environmentally friendly high-performance inorganic lightweight insulation material.
Some domestic units have developed wall insulation dry-mixed mortar with vitrified microbeads (closed-hole perlite) as lightweight aggregates and applied them in engineering, but the thermal conductivity is above 0.06W/(mK). The vitrified microbead insulation mortar produced by the vitrified microbead insulation mortar formula, combined with the material foaming technology, has a thermal conductivity of less than 0.05 W/(mK), and can replace the organic thermal insulation material such as polystyrene board and extruded board. .
2 Vitrified micro-beads integral thermal insulation building insulation performance integral thermal insulation building (also known as "urban cave dwelling") is on the exterior wall of the building and six walls of the room (including wall, floor and ceiling) A certain thickness of vitrified micro-bead insulation mortar is used as the thermal insulation layer to form a structural self-insulation system, and the corresponding construction, structure, foundation treatment, HVAC, fire protection, etc. are completed, and various construction technical work and engineering entities are completed. And the formation of energy-saving insulation buildings. In particular, the vitrification of vitrified microbead insulation mortar is as high as 1280 ft to 1360 ft, and the fire performance can reach A grade, which can greatly improve the fire performance of the structure itself.
3 Test comparison 3.1 Model test Firstly, the construction process of integral thermal insulation building and traditional thermal insulation building was simulated, and a 1:10 scale model of two two-story buildings was produced (see).
Integral heat-insulating building (left traditional building a (the right i horizontal type respectively placed a 1000W light bulb as a heating source on the two model layers, and the second layer placed an internal temperature LED display thermometer (accuracy 0.1) °C), one end of the thermocouple wire is connected to the thermometer, and the other end is extended into the top of the layer. The external temperature of the model is 25 °C, the two models are internally heated to 40 °C, and the heating is stopped at the same time. Observe and record once every 1 minute. See the results.
Through the discovery, the overall thermal insulation building has an average internal height of 3.5 ft compared with the traditional thermal insulation building, and the thermal insulation effect is remarkable.
3.2 Example test In order to further obtain accurate integral thermal insulation building and 2011.9 wall material innovation and building energy saving 41 horizontal stability temperature value (0) point 丨 (Xuanwai) - 1.01 test interest (Puyu residential) + 1.01 measuring point 3 (urban cave dwelling) Xuanwu city cave dwelling time 0 (h) model temperature test results compared with the traditional insulation building indoor temperature difference, a complete house insulation construction. The surrounding micro-walls and roofs in the room are treated with vitrified micro-bead insulation mortar, and the floor-mounted vitrified micro-bead insulation mortar is used to lay the floor heating bricks.
Project Overview: The building is arranged east-west, with a height of 2.8m, an outdoor heating load of -2.2 feet, and an indoor calculation temperature of 16 feet. The outer wall is 370mm, the inner wall is 240mm, and the sanitary partition wall is 120mm thick ordinary sintered brick wall. The outer insulation layer of the gable is 40mm thick, the outer insulation layer of the stair partition is 30mm thick, the inner insulation layer is 30mm thick, the insulation inside the balcony is 30mm thick, the floor insulation layer is 30mm thick, the basement is 30mm thick, and the ceiling is 30mm thick. The outer door and window are sealed with Plastic doors and windows for beading.
For the winter and summer climates, the indoor temperature and humidity of the integrated thermal insulation building and the traditional thermal insulation building were tested and compared for 24 hours.
The winter test time is from January 1st to 31st, 2008. The test period is continuous sunny day, with cloudy days, short sunshine time and small illumination value. The indoor and outdoor temperature difference is large, the relative humidity is small, and the air is dry. It is a typical winter climate. The summer test time is from July 15th to August 30th, 2008. During the test period, there are continuous sunny days, thunderstorms, strong sunshine, long sunshine hours, obvious temperature difference between day and night, and large relative humidity (the relative humidity is the lowest). 46%, the highest value is around 94%), is a typical summer climate. The test results are shown in ~. The winter temperature comparison between the "urban cave" model and the ordinary house is given. The average temperature of the “urban cave dwellings†in winter is 18.13 feet, which is 4.18 feet higher than that of ordinary houses. The attenuation ratio of ordinary houses to outdoor fluctuations is 2.5, the attenuation factor of “urban caves†is about 7, and the envelope structure of -1.01 points 1 (outside) 1.01 points 2 (Pu Si Residence) 1.01 points 3 (city kiln) In the meantime, the thermal stability of the 00 B6 “City Caves†and the ordinary residential I quarters is significantly better than that of ordinary houses.
It can be seen that the winter humidity of “urban cave dwellings†has been maintained at around 60%, which is higher than that of ordinary dwellings, and there is no drying phenomenon often seen in the northern winter indoors, and there is no such thing as ordinary indoor housing with outdoor humidity fluctuations. The peaks and troughs.
Comparing the summer temperature of the “urban cave dwellings†between the model houses and ordinary houses, it can be seen that under the same outdoor temperature conditions, the indoor temperature of “urban cave dwellings†is lower than that of ordinary houses in all time periods, and the average temperature is 3.87 feet lower. When the outdoor temperature fluctuates within the range of 15 ft to 35 ft, the indoor air temperature fluctuation range is maintained between 16 ft and 26 ft, meeting the requirements of human thermal comfort for air temperature.
42 Wall material innovation and building energy saving 2011.9 External wall thermal insulation fire prevention problem Zhu Chuanqi Li Dongyi (Shandong Province Wall Materials Innovation and Building Energy Conservation Office, Jinan 250001) In view of the current fire prevention problems faced by external wall insulation, it is analyzed in addition to the fireproof performance of insulation materials. The reasons for the supervision and management level, and give suggestions and measures.
External thermal insulation; fire prevention; supervision and management; recommendations and measures 1 Foreword Since the launch of building energy conservation in China, external wall insulation technology has occupied an absolute advantage in the construction of new buildings and wall insulation projects for energy-saving renovation of existing buildings. It has played a very important role in the development of China's building energy efficiency. However, major fire accidents caused by external thermal insulation in construction projects have occurred frequently in recent years, which not only seriously endangers the lives and property of the country and the people, but also has a serious negative impact on the energy conservation of new buildings and the energy-saving renovation of existing buildings. Therefore, properly solving the fire safety problem is a prerequisite for ensuring the orderly and healthy development of building energy conservation work.
In order to solve the problem of thermal insulation and fire protection of external walls, relevant departments have jointly or separately issued articles, and the external wall insulation materials or wall insulation fireproof structures, especially the combustion performance level of insulation materials have been strictly regulated. However, the author believes that in order to solve the current fire safety problems of building exterior insulation, in addition to the current domestic practice, appropriate improvement of the combustion performance level of insulation materials and the adoption of effective fire protection construction measures, the most important thing is to also supervise the management Think deeply.
2 Analysis of the causes From the analysis of the occurrence of fires over the years, the culprit on the surface is that the burning performance level of the thermal insulation materials does not meet the national standard requirements, and the construction operation violates regulations, resulting in frequent fires. Through the phenomenon that the combustion performance of the external wall insulation material is unqualified, the deeper reasons behind it are thought-provoking.
2.1 Lack of effective supervision on the scene According to the fire situation occurred in recent years, the vast majority of fire accidents occurred in the construction phase. The construction unit reduced the cost of the project and adopted the “flammable board wall and flame retardant board widely distributed in the society. The "rules" of the inspection, in this way, a piece of flammable insulation board attached to the outer wall of the building, a building has buried a huge fire safety hazard.
Although the state has introduced relevant regulations, policy documents, rules and regulations, etc., the actual implementation is quite different, especially the supervision of the construction link, and the persistent ills of implementation are always there. Even after the media exposed the current violation of the use of thermal insulation materials, the relevant departments still ignored this, did not learn lessons in time to make corresponding countermeasures, and did not strengthen education and training for construction, supervision and other departments, all still if nothing happened, resulting in Fire accidents occurred one after another.
2.2 Independence of engineering supervision and technical skills are seriously lacking In the past 20 years, the introduction of supervision system has played a great role in cultivating, developing and perfecting China's construction market. However, the independence and technical skills of engineering supervision are seriously lacking, resulting in no supervision. As a result of testing, the vitrified micro-bead insulation mortar is combined with other construction materials such as walls, floors and ceilings to compare the thick soil around the cave. The whole system forms a thermos liner similar to a closed hexahedron. Insulation and moisturizing environment maintains the temperature and humidity fluctuations in the building room within a very small amplitude range, and the heat preservation effect is remarkable.
4 Conclusion In summary, the vitrified microbeads integral thermal insulation building has significant advantages in terms of thermal insulation and energy conservation. As long as the system construction practices and acceptance criteria are standardized to ensure the quality of the project, it has good economic and social benefits.
(Finish)
Adhesive Layer Pu Reins,Dry-Process Adhesive Layer,One Component Pu Resins,Dry-Process Pu Resin
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