CN101713724A - Method for testing security of external thermal insulation system of building - Google Patents
Method for testing security of external thermal insulation system of building Download PDFInfo
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- CN101713724A CN101713724A CN200910198760A CN200910198760A CN101713724A CN 101713724 A CN101713724 A CN 101713724A CN 200910198760 A CN200910198760 A CN 200910198760A CN 200910198760 A CN200910198760 A CN 200910198760A CN 101713724 A CN101713724 A CN 101713724A
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Abstract
The invention discloses a method for testing security of an external thermal insulation system of a building, which is characterized in that: a weathering chamber is arranged in a laboratory; the external thermal insulation system is built on a basic unit wall of the weathering chamber, and is cured for at least 30 days; a sample wall is pushed to attach to two sides of the weathering chamber for a weathering experiment; the performance change of the external thermal insulation system, including bubbling, peeling, surface fine cracks, and adhesion loss and cracks between various layers of materials is observed; and the external thermal insulation system stands for 7 days, and then is subjected to a tensile strength experiment and an impact resistance experiment, wherein parameters of the weathering experiment comprise that: the temperature of the laboratory is set to between 10 and 25 DEG C; the relative humidity is not less than 50 percent; the hot rain cycling times in the weathering experiment of the weathering chamber in the laboratory is set to 150 times; a transient experiment of hot rain and thermal-cooling cycle are carried out at constant temperature of 20DEG C for 48 hours; and the thermal-cooling cycling times in the weathering experiment is set to 5 times.
Description
Technical field
The present invention relates to building heat insulation system security performance technical field of measurement and test, relate in particular to Xia Redong cryogenic region method for testing security of external thermal insulation system of building.
Background technology
The Xia Redong cryogenic region is one of area of concentration, China population settlement, and along with deepening continuously of urbanization process, the city dweller rolls up, and the demand of building is also heightened.Under the specific climatic environment in this area, a lot of problems have appearred in the exploitation of building exterior wall heat preserving system, and as infiltration, system comes off, insulation material thermal technology inefficacy etc.At the problem that occurs, the urban architecture external thermal insulation system quality safety Journal of Sex Research of developing a kind of Xia Redong of meeting cryogenic region characteristics becomes current vital task.
The existing exterior wall heat-preserving system security performance appraisal procedure of China is mainly in standard JGJ 144 " external wall outer insulation engineering rules ", embody the more existing standard of using for reference the Europe and the U.S. of quoting of these establishments of standard among JG 149 " expansion polyphenyl plate thinly plastered external insulation system of outer wall " and the JG 158 " micelle polyphenyl granule exterior wall outer heat preservation system ".Since American-European weather conditions, ambient temperature and humidity, wind-force, duration all is not quite similar with China round the clock, therefore inevitably has problems in the process of implementing.
Summary of the invention
The purpose of this invention is to provide a kind of method for testing security of external thermal insulation system of building, solve the problem that the External Thermal Insulation System method of testing can not adapt to the requirement of Chinese Xia Redong cryogenic region.
Technical scheme of the present invention is, a kind of method for testing security of external thermal insulation system of building, it is characterized in that, put weather-proof case in the laboratory, on this weather-proof case basic unit body of wall, build external thermal insulation system by laying bricks or stones, maintenance after at least 30 days the sample wall is pushed into weather-proof case both sides be close to carry out weather resistant experiment after, observe the foaming that comprises of described external thermal insulation system, peel off, the surface detail crack, the performance change of forfeiture bonding force and cracking between layers of material, and after above-mentioned steps, left standstill described external thermal insulation system 7 days, carry out this tensile strength experiment of external thermal insulation system and impact resistance experiment, the parameter setting of wherein said weather resistant experiment comprises:
If laboratory temperature is at 10 ℃ to 25 ℃, relative humidity is not less than 50%;
The weather resistant experiment hot rain circle index that weather-proof case in the described laboratory is set is 150 times;
Hot rain and hot cold round-robin transition experiment are set for 20 ℃ of constant temperature and kept 48 hours;
It is 5 times that the weather resistant experiment hot-cold cycle index is set.
Further, described weather-proof case is of a size of 4.00m * 2.60m * 1.80m, this weather-proof case carries temperature control and dehydrating unit, temperature regulating range-20 is ℃ to 80 ℃, humidity regulation scope 0% to 100%, described weather-proof case carries water tank and spray equipment, 15 ℃ of water tank water temperature constant temperature, all there is high 2.10m described weather-proof case both sides, the opening of wide 3.10m is used to install the sample wall, and the dimensional requirement of described basic unit body of wall is 2.10m * 3.10m, hot rain round-robin concrete steps in the described weatherability experiment are: casing was heated to 70 ℃ with 30 minute heating-up time, keep 70 ℃ ± 5 ℃ of temperature, relative humidity 40% kept 60 minutes, sprayed water 30 minutes, 15 ℃ ± 5 ℃ of water temperatures, injection flow rate 1.0L/m
2Minute～1.5L/m
2Minute and left standstill 1 hour, hot cold round-robin concrete steps in the described weatherability experiment are: kept 48 hours for 20 ℃ ± 5 ℃ at hot rain experiment back constant temperature, casing was heated to 50 ℃ with 60 minute heating-up time, in temperature is 50 ℃ ± 5 ℃, relative humidity is not more than under 10% the condition and placed 420 minutes, is to be cooled to-20 ℃ in 120 minutes with casing with temperature fall time, in temperature is to place 840 minutes under-20 ℃ ± 5 ℃ the condition.
The security of external thermal insulation system detect main under laboratory environment the simulating reality external environment condition to the influence of system.The formulation of external thermal insulation system safety experiment scheme among the present invention, main according to two aspect factors: first, the existing outer heat preservation system safety standard of China is main according to European similar standard formulation, and the present invention is to improve on original weatherability experiment basis to the experiment of outer heat preservation system safety test, promptly based on Europe superscript weatherability test experience.The second, the different schemes that experimentize of the German local climate condition of main reference are improved when formulating with Europe superscript at this area.
By contrasting the air temperature distribution for many years of Chinese Xia Redong cryogenic region and Germany, rainfall distributes, and the humidity situation of change has proposed the weatherability experimental technique at the Xia Redong cryogenic region.This method has mainly been adjusted hot rain circulation step in the weatherability experiment, and (existing normal experiment side Ming Reyu experiment period is 80 times, it is 150 times that the present invention tests period), by increase, the weather conditions of experimental technique and Xia Redong cryogenic region are complementary to laboratory strength.
Technical scheme of the present invention provides a kind of practicable safety test appraisement system for the external thermal insulation system that is fit to Chinese Xia Redong cryogenic region geographical environment and weather conditions.
Description of drawings
The weather-proof box structure synoptic diagram of test board in Fig. 1 embodiment of the invention wherein
1--------basic unit body of wall
2--------tests model
The 3--------spray equipment
The 4--------temperature and humidity control device
The 5--------operating means
The 6--------water tank
Comparison diagram before and after the expansion polyphenyl plate heat preserving system brassboard experiment in Fig. 2 embodiment of the invention
Crack, expansion polyphenyl plate heat preserving system experiment back detail view in Fig. 3 embodiment of the invention
Expansion polyphenyl plate heat preserving system tensile strength experiment back detail view in Fig. 4 embodiment of the invention
Embodiment
Be described further for the specific embodiment of the present invention below in conjunction with accompanying drawing.
As shown in Figure 1, the weather-proof casing of experiment at first is installed in the laboratory, keep laboratory temperature at 10 ℃ to 25 ℃, relative humidity is not less than 50%, the regulation and control parameter of weather box, it is 150 times that weather resistant experiment hot rain circle index is set, the regulation and control parameter of weather box is provided with hot rain and hot cold round-robin transition experiment is 20 ℃ of constant temperature, keeps 48h, the regulation and control parameter of weather box, it is 10 times that the weather resistant experiment hot-cold cycle index is set.
Build outer heat preservation system by laying bricks or stones on basic unit's body of wall, test specimen needs maintenance at least 30 days, after maintenance is finished the sample wall is pushed into weather-proof case both sides and is close to, and carries out weather resistant experiment.
After weather resistant experiment is finished, the sample wall is pushed open from the casing both sides, observed the characteristic or the performance change (bubble, peel off, bonding force is lost in the surface detail crack between layers of material, cracking or the like) of total system and finishing mucilage.Experiment is finished after 7 days system is carried out system's tensile strength experiment and system's impact resistance experiment.
Requirement in test, described weather-proof case is of a size of 4.00m * 2.60m * 1.80m.Described weather-proof case carries temperature control system, and temperature regulating range-20 is ℃ to 80 ℃.Described weather-proof case carries dehumidification system, humidity regulation scope 0% to 100%.Described weather-proof case carries water tank and spray equipment, 15 ℃ of water tank water temperature constant temperature.All there is high 2.10m described weather-proof case both sides, and the opening of wide 3.10m is used to install the sample wall.The dimensional requirement of described sample wall is 2.10m * 3.10m.In the described weatherability experiment, hot rain round-robin concrete steps are: 1) casing is heated to 70 ℃ (30min heating-up times), keeps 70 ℃ ± 5 ℃ of temperature, relative humidity 40% (keeping 60min); 2) water spray 30min, 15 ℃ ± 5 ℃ of water temperatures, injection flow rate 1.0L/m
2Min～1.5L/m
2Min; 3) leave standstill 1h.In the described weatherability experiment, hot cold round-robin concrete steps are: keep 48h for 20 ℃ ± 5 ℃ at hot rain experiment back constant temperature; 1) casing being heated to 50 ℃ (60min heating-up times), is 50 ℃ ± 5 ℃ in temperature, and relative humidity is not more than under 10% the condition and places 420min; 2) casing being cooled to-20 ℃ (temperature fall time is 120min), is to place 840min under-20 ℃ ± 5 ℃ the condition in temperature.Here h represents hour, and min represents a minute unit, and m represents Mi Danwei.
When adopting the expansion polyphenyl plate system as security of external thermal insulation system test experiments model of the present invention, contrast as shown in Figure 2 before and after the experiment, overall appearance does not have difference, does not see obvious cracking, bubbles, and comes off.As shown in Figure 3, there is the minority crack at the details position, all is in the float coat surface.
Leave standstill system after the experiment 7 days, and carried out system's tensile strength experiment and system's impact resistance experiment
Table 1 expansion polyphenyl plate system drawing experimental result
Model after adopting the swing type impact method to the weatherability experiment has carried out system's impact resistance experiment, 3J and the experiment of 10J two-stage have been carried out with 500g steel ball and 1000g steel ball respectively, the experiment model has passed through the two-stage experiment, reached the 10J standard, expansion polyphenyl plate heat preserving system tensile strength experiment back details such as Fig. 4.
This shows, adopt experimental technique of the present invention that outer heat preservation system is carried out the security test experience and improved laboratory strength, be in particular in that the minority crack has appearred in the expansion polyphenyl plate system top layer before and after the experiment, and do not find that on the normal experiment model of same producer simultaneous construction this crack exists.The while experimental system has been passed through tension experiment and the impact resistance experiment after the weatherability experiment, the section part display system base insulating layer of tension experiment is intact, the laboratory strength of preliminary this experimental technique of proof does not exceed zone of reasonableness, can not occur judging the normal occlusion case system by accident underproof phenomenon.
Based on the above results, prove that method of testing provided by the invention is effective and feasible.
Claims (2)
1. method for testing security of external thermal insulation system of building, it is characterized in that, put weather-proof case in the laboratory, on this weather-proof case basic unit body of wall, build external thermal insulation system by laying bricks or stones, maintenance after at least 30 days the sample wall is pushed into weather-proof case both sides be close to carry out weather resistant experiment after, observe the foaming that comprises of described external thermal insulation system, peel off, the surface detail crack, the performance change of forfeiture bonding force and cracking between layers of material, and after above-mentioned steps, left standstill described external thermal insulation system 7 days, carry out this tensile strength experiment of external thermal insulation system and impact resistance experiment, the parameter setting of wherein said weather resistant experiment comprises:
If laboratory temperature is at 10 ℃ to 25 ℃, relative humidity is not less than 50%;
The weather resistant experiment hot rain circle index that weather-proof case in the described laboratory is set is 150 times;
Hot rain and hot cold round-robin transition experiment are set for 20 ℃ of constant temperature and kept 48 hours;
It is 5 times that the weather resistant experiment hot-cold cycle index is set.
2. method for testing security of external thermal insulation system of building according to claim 1, it is characterized in that, described weather-proof case is of a size of 4.00m * 2.60m * 1.80m, this weather-proof case carries temperature control and dehydrating unit, temperature regulating range-20 is ℃ to 80 ℃, humidity regulation scope 0% to 100%, described weather-proof case carries water tank and spray equipment, 15 ℃ of water tank water temperature constant temperature, all there is high 2.10m described weather-proof case both sides, the opening of wide 3.10m, be used to install the sample wall, the dimensional requirement of described basic unit body of wall is 2.10m * 3.10m, and the hot rain round-robin concrete steps in the described weatherability experiment are: casing was heated to 70 ℃ with 30 minute heating-up time, keeps 70 ℃ ± 5 ℃ of temperature, relative humidity 40% kept 60 minutes, sprayed water 15 ℃ ± 5 ℃ of water temperatures, injection flow rate 1.0L/m 30 minutes
2Minute～1.5L/m
2Minute and left standstill 1 hour, hot cold round-robin concrete steps in the described weatherability experiment are: kept 48 hours for 20 ℃ ± 5 ℃ at hot rain experiment back constant temperature, casing was heated to 50 ℃ with 60 minute heating-up time, in temperature is 50 ℃ ± 5 ℃, relative humidity is not more than under 10% the condition and placed 420 minutes, is to be cooled to-20 ℃ in 120 minutes with casing with temperature fall time, in temperature is to place 840 minutes under-20 ℃ ± 5 ℃ the condition.
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| CN200910198760A CN101713724A (en) | 2009-11-13 | 2009-11-13 | Method for testing security of external thermal insulation system of building |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102539307A (en) * | 2011-07-12 | 2012-07-04 | 浙江华电器材检测研究所 | Light aging testing method for composite core rod |
| CN102866103A (en) * | 2012-10-15 | 2013-01-09 | 方远建设集团股份有限公司 | Weather resistance detection device for outer wall test piece |
| CN103439357A (en) * | 2013-08-20 | 2013-12-11 | 上海市建筑科学研究院 | Method for testing moisture-heat transfer performance of exterior wall and dedicated climate simulation test chamber therefor |
| CN111638165A (en) * | 2020-05-26 | 2020-09-08 | 武汉弘泰建筑工程质量检测有限公司 | Method for detecting durability of external wall energy-saving heat-insulating structure |
-
2009
- 2009-11-13 CN CN200910198760A patent/CN101713724A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102539307A (en) * | 2011-07-12 | 2012-07-04 | 浙江华电器材检测研究所 | Light aging testing method for composite core rod |
| CN102539307B (en) * | 2011-07-12 | 2013-12-25 | 浙江华电器材检测研究所 | Light aging testing method for composite core rod |
| CN102866103A (en) * | 2012-10-15 | 2013-01-09 | 方远建设集团股份有限公司 | Weather resistance detection device for outer wall test piece |
| CN103439357A (en) * | 2013-08-20 | 2013-12-11 | 上海市建筑科学研究院 | Method for testing moisture-heat transfer performance of exterior wall and dedicated climate simulation test chamber therefor |
| CN111638165A (en) * | 2020-05-26 | 2020-09-08 | 武汉弘泰建筑工程质量检测有限公司 | Method for detecting durability of external wall energy-saving heat-insulating structure |
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Application publication date: 20100526 |