CN1916615A - Equipment for checking-out effect of heat insulation for building material, checking-out method and evaluation method - Google Patents
Equipment for checking-out effect of heat insulation for building material, checking-out method and evaluation method Download PDFInfo
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- CN1916615A CN1916615A CNA2006100156119A CN200610015611A CN1916615A CN 1916615 A CN1916615 A CN 1916615A CN A2006100156119 A CNA2006100156119 A CN A2006100156119A CN 200610015611 A CN200610015611 A CN 200610015611A CN 1916615 A CN1916615 A CN 1916615A
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Abstract
A device used to detect heat isolation effect of construction material is prepared as dividing box body to be top body and bottom body and setting sample plate support between the two, arranging seal door and heating source at front surface and top surface of to body and setting the rest of top body to be hollow two-layer structure, setting bottom body to be two-layer wall structure, opening three observation hole on one side wall of bottom body and setting temperature transducer there and under sample plate support, connecting each said transducer to digital display thermometer and setting dislocated heat radiation holes on top body. The detecting method utilizing said device is also disclosed.
Description
Technical field
The present invention relates to a kind of detection technique of effect of heat insulation for building material, specifically comprise effect of heat insulation for building material or performance detection device, detection method and evaluation method, international Patent classificating number intends being Int.Cl.G01K 1/20 (2006.01).
Technical background
A large amount of statistical data prove that building energy consumption accounts for 30～40% of whole society's total energy consumption, and wherein main energy consumption is heating and air-conditioning.If can improve the impermeability of buildings, isolated wall, door and window be to the transmission of energy, just can be under the condition that guarantees identical indoor temperature the startup frequency of minimizing air-conditioning and the quantity of working time and Winter heat supply.The most frequently used heat-insulating method is exactly to utilize heat preserving and insulating material to replace traditional material to reduce building energy consumption, improves utilization efficiency of energy.Therefore, heat preserving and insulating material and using method thereof are the material bases of building energy conservation.
Traditional heat preserving and insulating material is mainly used in the insulation of industrial pipeline and heating facility.Along with the global climate that the aggravation of energy crisis and environmental pollution, particularly greenhouse effect cause is unusual, the escalating of energy prices, energy-conservation the consistent of national governments that become known together.Power save mode is also experiencing once by the heat insulation expansion to the covil construction insulation of industrial heat preservation, and heat-insulating technique is also by the technical change of thick-layer heat-insulation and heat-preservation to thin layer thermal insulation.Rely on and destroy by the transition of energy-conservation minimizing economic development resource, significant to improving the national energy structure and the style of economic increase etc.
The energy saving building of China adopts heat-barrier material as heat-insulation layer more, the transmission of block heat, promptly the thermofin by being made by the material of low thermal conductivities such as polyphenyl foaming forms a thermograde, slow down the transmission of heat, thereby play the effect of heat-insulation and heat-preservation by conductive form.At present, heat-insulating material method in common is that fiberglass gridding cloth adds woven wire and anchor nails at body of wall outer wrapping one deck polystyrene foam plate, is coated with in its outside and scrapes the thick sand-cement slurry of about 6mm, carries out external coating then.So-called external-wall exterior insulation system (ETIC) that Here it is.This system is after the seventies in 20th century, oil crisis took place, and the energy consumption of, industrial building civilian for reducing to greatest extent and facility progressively grows up.Along with updating of material and application technology, ETIC heat preservation and decoration of outer wall system has become in the current building energy conservation body of wall one of the most competitive system.But because of its system is constructed loaded down with trivial details, the cost height, be not suitable for the construction of special-shaped complex structure, and have a large amount of EPS plate seams in the whole system, formed many " heat bridges ", be difficult to the energy-saving effect of further raising system, and in case heat is imported inside into by the surface, heat energy will be absorbed by heat-barrier material, also can " will be stranded and fall into " therein, cause the rising of temperature, reduce the effect of heat insulation of material.In addition, Chang Yong heat-insulating material heat-insulating method also comprises the several methods such as thermofin (comprising thermal insulation coatings, heat-insulation systems such as mineral wool or expanded vermiculite), water spray and metallic reflection barrier film that add other material.These methods all be not so good as described ETIC heat preservation and decoration of outer wall system effective, use wide.
For the assay method and the evaluating apparatus of effect of heat insulation for building material, still be in the development stage at present, also do not set up unified national standard or authority's current international practice standard.Common evaluation method mainly contains following 3 kinds:
1. with reference to U.S. army mark in 1976, select identical function instrument home-made contrivance for use, set up the heat-insulation property of heat-insulation coating test macro, and do the contrast test, come the effect of heat insulation of evaluation insulating moulding coating roughly with standard coating.2. deliver the coefficient of heat conductivity that professional authority detection department measures material, the effect of heat insulation of Indirect evaluation heat-barrier material.3. use the effect of heat insulation that some effect of heat insulation evaluation criterions that are analogous to each other with open system and device come the Indirect evaluation heat-barrier material.Their great majority are fixed a thermal source (for example: water bath with thermostatic control, infrared lamp or daylight lamp etc.) in open system, the testing sample plate is placed on the slit with the thermal source certain distance, measure the double-edged temperature difference of building materials test board by temperature-sensing element such as thermal resistance, thermopair or infrared thermometer etc., estimate its effect of heat insulation with this.
The method of the mensuration effect of heat insulation for building material of these routines and device all exist many problems.For example described 1,3 two kind of method are very easy to be subjected to external influences such as test environment such as temperature, air pressure, air flow, and reappearance and reliability are bad; Though the 2nd kind of method can reflect the transmission effect of building materials to heat preferably, but because the transmission of heat is normally by conduction, convection current and radiation three aspect acting in conjunction influences, only measure material can't reflect heat-barrier material comprehensively to the conduction efficiency of heat practical function effect, particularly at present external popular high reflective insulation new material, only estimate its heat-proof quality, certain one-sidedness is arranged by heat conduction property; On the other hand, the test period of this method is long, the expense height.
Summary of the invention
At the deficiencies in the prior art, the technical problem to be solved in the present invention is to design a kind of effect of heat insulation for building material pick-up unit and detection method and evaluation method.This pick-up unit is simple in structure, stability and good reproducibility, and accuracy of detection height, error are little, and manufacturing cost and use cost is low, and is easy and simple to handle; This detection method can directly detect heat insulation for building material performance or effect, and it is accurate, quick, convenient to detect, and effect is directly perceived, and is applied widely; This evaluation method science is simple, and effect is directly perceived, and is practical.
The technical scheme that the present invention solves described pick-up unit technical matters is: design a kind of effect of heat insulation for building material pick-up unit, comprise the digital display temperature meter that casing and casing upper surface are installed, described casing is divided into upper box and lower box, the sample grillage that can place the specimen plate is arranged between the upper and lower casing, the front of upper box is furnished with hollow double-layer seal door, its excess-three face and end face are the hollow double-wall structure, the center is equipped with heating source in the end face, and the wall of lower box and bottom surface are the double-wall structure of interlayer filling heat insulator; Have the detection duct respectively in the center and the middle place thereof of a sidewall separately at upper and lower casing, be separately installed with the upper, middle and lower temperature sensor in the duct; On two sidewalls of lower box symmetry, be symmetrically installed with two supports below the sample grillage, support is separately installed with spring near center-side, spring supports symmetrical to stick the middle temperature sensor on specimen plate lower surface respectively, temperature sensor inserts with the detection duct that detection duct symmetric position is opened from the sidewall of described lower box in another, and described each temperature sensor all is electrically connected with described digital display temperature meter; The sidewall of upper box reaches the louvre that has inside and outside cinclides dislocation on the another side sidewall symmetrical with it.
The technical scheme that the present invention solves described detection method technical matters is: design a kind of effect of heat insulation for building material detection method, this detection method is used effect of heat insulation for building material pick-up unit of the present invention, and adopts following steps:
1). the preparation of specimen plate
(1) preparation of sheet material class testing of materials sample panel: sheet material class material is cut into the specimen plate of rectangle, and thickness H is 3～100mm;
(2) preparation of cream pastes class testing sample panel: the cream pastes divide 2-3 time by moulding, blade coating, brush or be sprayed on the standard vector plate, make uniform specimen plate; Described standard vector plate is meant and is of a size of 300 * 300mm that thickness is glass plate, porcelain plate or the sheet metal of 3mm;
(3) preparation of coating class testing of materials sample panel: coating divide 2-3 time by blade coating, brush or be sprayed on the standard vector plate, make uniform specimen plate;
2). the detection of specimen plate
(1) opens described pick-up unit door, the specimen plate is positioned on the sample grillage, and in described, install the upper surface temperature sensor on the sample panel upper surface position of temperature sensor correspondence;
(2) close the pick-up unit door, start detects, and is not less than 1 hour detection time;
(3), provide the opinion rating of the effect of heat insulation for building material of surveying by standard according to testing result.
Compared with prior art, effect of heat insulation for building material pick-up unit of the present invention is simple in structure, need not to use other special necessary instruments, it is low to detect cost, and speed is fast, simple to operate, effect is directly perceived, and the scope of application is extensive, and the design of closed box body structure has been avoided influencing the detection deviation that is caused because of external factors such as environment temperature, pressure, air flow, can realize the mensuration of long-time continuous, make test result have stability and repeatability.Effect of heat insulation for building material detection method of the present invention and evaluation method are simple to operation, need not use infrared temperature measurement apparatus to assist thermometric, test point is many, and test position is fixed, by drawing temperature variation curve and calculating, the effect of heat insulation of quantitative response, contrast and evaluation building materials is practical more accurately, is easy to apply.
Description of drawings
Fig. 1 looks synoptic diagram for the interior shape structure master of effect of heat insulation for building material pick-up unit of the present invention;
Fig. 2 is the interior shape structure side-looking diagrammatic cross-section of effect of heat insulation for building material pick-up unit of the present invention;
Fig. 3 is the partial structurtes synoptic diagram at the middle part of effect of heat insulation for building material pick-up unit of the present invention;
Fig. 4 is the flat shape synoptic diagram of the specimen grillage of effect of heat insulation for building material pick-up unit of the present invention;
Fig. 5 detects the heat-proof quality curve map of certain coating for effect of heat insulation for building material pick-up unit of the present invention and detection method embodiment 1;
Fig. 6 is the heat-proof quality curve map of effect of heat insulation for building material pick-up unit of the present invention and detection method embodiment 2 certain phase transformation putty.
Embodiment
Further narrate the present invention below in conjunction with embodiment and accompanying drawing thereof:
A kind of effect of heat insulation for building material pick-up unit of the present invention's design is (hereinafter to be referred as pick-up unit, referring to Fig. 1-4), comprise the digital display temperature meter 1 that casing 14 and casing 14 upper surfaces are installed, described casing 14 is divided into upper box 5 and lower box 6, the sample grillage 16 that can place specimen plate 4 is arranged between the upper and lower casing 5,6, the front of upper box 5 is furnished with hollow double-layer seal door 8, its excess-three face and end face are the hollow double-wall structure, the center is equipped with heating source 2 in the end face, and the wall of lower box 6 and bottom surface are the double-wall structure of interlayer filling heat insulator 7; Have detection duct 91,93 and 92 respectively in the center and the middle place thereof of a sidewall 121,122 separately at upper and lower casing 5,6, be separately installed with upper, middle and lower temperature sensor 31,34 and 32 in the duct 91,93 and 92; Below going up sample grillage 16, two sidewalls 122 and 122 ' of lower box 6 symmetries are symmetrically installed with two supports 11 and 11 ', support 11 and 11 ' is separately installed with spring 10 and 10 ' near center-side, spring 10 and 10 ' supports symmetrical to stick the middle temperature sensor 34 and 34 ' on specimen plate 4 lower surfaces respectively, temperature sensor 34 ' inserts described each temperature sensor 31 from the sidewall 122 ' of described lower box 6 with the detection duct 92 ' that detection duct 92 symmetric positions are opened in another, 32,34 and 34 ' all is electrically connected with described digital display temperature meter 1; Have the louvre 15 of inside and outside cinclides dislocation on the sidewall 121 of upper box 5 and the another side sidewall 121 ' symmetrical with it.
The further feature of pick-up unit of the present invention is that described digital display temperature meter 1 can be connected with computer (understand easily, do not draw among the figure) by interface, can be carried out collection, storage and the calculating of temperature data by computer.Digital display temperature meter 1 places the top of pick-up unit, i.e. the upper surface of casing 14 is in order to real-time demonstration and the temperature data that writes down different surveyed areas and detection time.According to the needs of record data position and quantity, digital display temperature meter 1 can be selected the recording instrument without paper or the temperature scan tester (temperature polling instrument) of 8 passages or 16 passages, considers cost, generally can select temperature polling instrument for use.
Described temperature sensor 31,32,34 of pick-up unit of the present invention and 34 ' embodiment have all adopted higher temperature-sensing element Pt 100 thermistors of sensitivity, utilize it can sensitive induction and accurately record from begin to be heated to detect in the concluding time section (go up temperature sensor 31) in the pick-up unit heating chamber 5, sample panel 4 go up (the upper surface temperature sensor of laying during detection 33 and 33 '), lower surface (temperature sensor also underlaying surface temperature sensor 34 and 34 '), the temperature and the variation thereof of each point of fixity in the moist closet 6 (following temperature sensor 32).If digital display temperature meter 1 is connected with computing machine by interface circuit, can also draw out the curve of time and temperature variation, calculate sample panel 4 upper and lower surfaces and the temperature variation numerical value in the space up and down thereof, further realize automatic control survey and data analysis, thereby more accurate quantification is estimated out the effect of heat insulation and the grade of building materials.
Because heating source 2 is arranged, therefore be also referred to as heating chamber in the upper box 5 of pick-up unit of the present invention; The wall of lower box 6 does not have door, and is the double-wall structure of interlayer filling heat insulator 7, is a highly adiabatic closed box body structure, in order to preventing to produce direct heat convection current and conduction, and realizes the balance of temperature in the casing and stable, therefore is also referred to as moist closet.The further feature of pick-up unit of the present invention is that also the double wall thickness of the wall of described lower box 6 and bottom surface is greater than the wall (comprising a wall) of upper box 5 and the double wall thickness of end face.The moist closet double wall thickness of embodiment design exceeds 50% than heating chamber double wall thickness.This design helps further improving the heat insulation effect of moist closet 6.Under this design conditions, can or save sample grillage 16 during detection, testing sample plate 4 directly is placed on the inwall 132 of lower box 6 and the inwall 131 and the formed step of 131 ' thickness part that 132 ' thickness correspondence exceeds upper box 5.For detection method, though sample grillage 16 can or be saved in this pick-up unit design, but it requires the size of sample panel 4 to cooperate with the inner cavity size of upper box 5 (promptly can be placed in described lower box to sample panel 4 exceeds on the step of wall thickness formation), also is unsuitable for the detection of relative reduced size sample panel.Obviously, even this structural design during detecting operation, equally also can be used sample grillage 16.
The inner cavity size of pick-up unit upper box 5 of the present invention generally can be designed to: long 500～550mm, wide 500～550mm, high 500～700mm; The inner cavity size of lower box 6 is: long 500～550mm, wide 500～550mm, high 500～700mm; Embodiment all takes off limit value.The thermal insulation material 7 that the heat-insulation layer of described lower box 6 is filled is thermal insulation materials such as mineral wool, expanded perlite, filling thickness 60 mm.Heating source 2 in the described upper box 5 can use 100～250W infrared bulb, and embodiment is 100W; Described each temperature sensor 31,32,33 and 33 ', 34 and 34 ' evenly can use thermistor or thermopair; The material of described sample grillage 16 is the high-density polystyrene plate, is shaped as square or rectangular, and geomery cooperates with the inner cavity size of upper box 5 for good, and embodiment is 450 * 450 * 30mm; Square or rectangular hole (cooperating with sample panel 4) is opened in the centre of sample grillage 16, and embodiment is a square hole, and length of side design has 230,280,330 and four kinds of specifications of 380mm, to adapt to the detection requirement of different size sample panel 4.The louvre 15 that has inside and outside cinclides dislocation on the sidewall 121 of described upper box 5 and the another side sidewall 121 ' symmetrical with it is 6-12, diameter 8-12mm.The size of louvre and quantity can change, and 6-12, diameter 8-12mm is normally used scope.
A kind of effect of heat insulation for building material detection method (abbreviation detection method) of the present invention's design, this detection method is used pick-up unit of the present invention, and adopts following steps:
1). the preparation of specimen plate
Pick-up unit of the present invention and detection method are applicable to various heat-insulating materials, comprise sheet material class material, powder paste pastes and coating.Different heat-insulating testing of materials sample panel have different preparation methods:
(1) preparation of sheet material class testing of materials sample panel: sheet material class material is cut into the specimen plate of rectangle, and thickness H is 3～100mm.The rectangle plane size of sheet material class testing of materials sample panel and thickness depend on the size design of pick-up unit upper box 5 inner chambers and the material and the specification of sheet material class material.
(2) preparation of cream pastes class testing sample panel: the cream pastes divide 2-3 time by moulding, blade coating, brush or be sprayed on the standard vector plate, make uniform specimen plate; Described standard vector plate embodiment size is meant the length of side 300 * 300mm, square glass plate, ceramic wafer or the sheet metal of thickness 3mm.In the practical application, the size of standard vector plate of the present invention can be designed as the length of side 250,300,350,400 and five kinds of specifications of 450mm, and thickness is square glass plate, ceramic wafer or the sheet metal of 3mm.
(3) preparation of coating class testing of materials sample panel: coating divide 2-3 time by blade coating, brush or be sprayed on the standard vector plate, make uniform specimen plate;
2). the detection of specimen plate
(1) opens described pick-up unit door, the specimen plate is positioned on the sample grillage, and on the underlaying surface temperature sensor 34 of described sample panel 4 and 34 ' corresponding sample panel 4 upper surface positions, install upper surface temperature sensor 33 and 33 ', and it is electrically connected with described digital display temperature meter 1 by described detection duct 91; The spring 10 and 10 ' that the underlaying surface temperature sensor 34 of described sample panel 4 and 34 ' relies on described support 11 and 11 ' close center-side to install is respectively supported, described underlaying surface temperature sensor 34 and 34 ' is firmly sticked in the lower surface of sample panel 4, guarantee to detect under the various test conditions accurately and stablize.In some cases, for example, the thermal insulation of specimen plate, underlaying surface temperature changes not quite in time, do not use during detection described support 11 and 11 ' and spring 10 and 10 ' also can work.Simultaneously, under this condition, pick-up unit of the present invention also can save described support 11 and 11 ' and spring 10 and 10 ' mechanism, but it will make sensing range and stable accuracy be affected.
(2) close the pick-up unit door, start detects, and is not less than 1 hour detection time;
(3), provide the opinion rating of the effect of heat insulation for building material of surveying by standard according to testing result.
Effect of heat insulation for building material detection method of the present invention is further characterized in that described specimen plate 4 three for parallel manufacturing, error requirements between three blocks of specimen plates 4 is: the length and width scale error of sheet material class testing of materials sample panel is no more than ± 2mm, and thickness H error is no more than ± 0.025H; The standard vector plate error requirements of cream pastes and coating class testing of materials sample panel is same as described sheet material class testing of materials sample panel, and the quality W of itself is 30～60g, and error is no more than ± 0.025W.For the detection of heat-insulating material, same batch material measure should use same batch, same specification with sample panel or standard vector plate.Each test should prepare 3 parallel specimen plates with identical method.3 parallel specimen board test results get its average.
Cream pastes of the present invention and coating class material divide and evenly are coated in for 2-3 time on the uniform standard vector plate of quality, after being meant that coating is finished for the first time, after must waiting this coating bone dry, apply again next time, the time interval of per twice coating should be greater than 4h, so that make the testing sample plate of quality homogeneous, the gained sample panel is at ambient temperature more than the air dry 48h, weigh again behind the bone dry, calculate and write down the quality W (dry weight of coating) of its material itself.Described parallel sample plate requires specification unanimity, quality even, and can not there be tangible crackle or hole in the surface.This requirement is the essential principle of sample panel quality, therefore, after described cream pastes and coating class material evenly apply for 2-3 time, in the time of still can not meeting the demands, then can carry out the 4th coating, even more times coating.Described cream pastes is meant that mineral fibres for building or pulverulent material directly add the building materials that water can be made into plastic material or cream pasty state, as putty etc.
Be understood that the thickness H of specimen plate is more important than its planar dimension.Generally speaking, the thickness H value of specimen plate is big more, and effect of heat insulation is good more.But the thickness requirement of different heat-insulating materials is different, and the sheet material class is very thick, and the coating class is very thin, and the cream pastes is placed in the middle.Though detection method of the present invention has provided specific requirement to the preparation thickness of sample panel 4, during practical operation, the actual (real) thickness when can the heat-insulating material engineering using directly detects its effect of heat insulation for according to preparing sample panel.Pick-up unit of the present invention detects thickness and has extensive adaptability, and solid plate, fiber and building materialss such as dusty material and coating are all applicable; Effect of heat insulation to material is also unqualified, no matter is that the general common building material of good thermal insulation material or effect of heat insulation is all applicable, is very beneficial for test, evaluation and the contrast of multiple heat insulation for building material performance or effect.
The pick-up unit and the detection method principle of work of the present invention design are: the mode that heat is transmitted is divided into three kinds of conduction, convection current and radiation.For the heat-insulating material of same thickness and quality, the material that coefficient of heat conductivity is low, under the condition that one side is heated, the thermal response of another side is insensitive, the temperature difference that is heat-insulating testing of materials sample panel two sides is very big, therefore, the temperature difference of specimen plate 4 both sides can be reacted the heat conducting performance of building materials.But if if bigger hole is arranged in the middle of the heat-insulating testing of materials sample panel, can produce thermal convection, the variation of multiple spot detected temperatures field will find, As time goes on, the sample panel 4 bottom surfaces detected temperature difference of different thermal resistances is just more obvious, different change of temperature field curves occurs.If sample panel 4 surfaces are strong to the reflection potential of heat radiation (visible light, infrared ray), comparatively speaking, the speed that sample panel 4 heating surface temperature raise will be slow, and space temperature field will be high in the heating chamber 5.If seeing through of 4 pairs of heat radiations of sample panel (visible light, infrared ray) is very capable, heat radiation will aggravate, although the temperature variation of sample panel 4 bottom surfaces may be little, but the space temperature field in the moist closet 6 over time will be very fast, and the space temperature field in the corresponding heating chamber 5 also bigger variation can occur.These characteristics and variation according to heat is transmitted by sensitive, stable pick-up unit and data presentation and disposal system, just can obtain the effect of heat insulation curve or the data of building materials accurately, fast, intuitively.The analysis of the present invention by the measurement of multi-point temp and temperature field are distributed, but the thoroughly evaluating building materials to heat radiation, thermal convection and heat conducting contribution, objective reality ground reflects the effect of heat insulation of building materials.
The effect of heat insulation for building material of the present invention design or the determinator of performance just are based on above-mentioned principle design.But its not exclusive design.Pass through temperature sensor, automatically detect and record specimen plate 4 upper and lower two surfaces and separate change of temperature field in the upper and lower sealing insulation casing 5,6, and then the pick-up unit of evaluation effect of heat insulation for building material is a design proposal of the present invention by specimen plate 4.A large amount of test shows: pick-up unit of the present invention has simple in structure, good stability, accuracy of detection height, good reproducibility, advantage such as manufacturing cost and cost of use are cheap, and be easy and simple to handle, and measuring error is little.Detection method of the present invention fast, accurately, conveniently is very beneficial for actual applying.
In order effectively and better to estimate the effect of heat insulation of building materials, the present invention has set up a cover effect of heat insulation for building material evaluation method or evaluation (standard) system.This System Design is: use based on pick-up unit of the present invention and data that detection method detected, effect of heat insulation for building material by bad be the I-IV level to optimal sorting.Be specially:
The I level---there is not effect of heat insulation substantially, promptly not heat insulation;
The II level---certain effect of heat insulation is arranged, promptly heat insulation poor;
The III level---good effect of heat insulation is arranged, promptly heat insulation good;
The IV level---excellent effect of heat insulation is arranged, promptly adiabatic.
In order to express effect of heat insulation for building material, introduce the notion of coefficient of heat insulation k, and effect of heat insulation for building material is carried out the evaluation of I-IV level according to coefficient of heat insulation k value size.Coefficient of heat insulation k is defined as: in the test duration of 60min, and the difference DELTA T of the temperature value T1 heating surface temperature value non-T2 of construction material sample plate heating surface and the ratio of tested construction material sample plate thickness H (mm) with it.Its equation expression is:
Coefficient of heat insulation
In the formula: k---coefficient of heat insulation, unit K/mm;
T1---the temperature absolute value of specimen plate heating surface, K;
T2---the absolute value of the temperature of the non-heating surface of specimen plate, K;
T3---the absolute value of temperature in the moist closet, K;
The clean thickness of H---construction material sample plate (sheet material or coating), the mm of unit.
Effect of heat insulation for building material according to the evaluation index of the concrete I-IV level of coefficient of heat insulation k value is:
1. coating (layer) class (the heat-insulating material of thickness＜10mm)
For the carrier board that is of a size of 300 * 300mm, when coating quality is 200 ± 5g/m
2, under the infrared light supply irradiation 1h of 100W condition,
During Δ T＜2.0 of 1mm unit ℃, coefficient of heat insulation k is defined as the I level;
During the 2.0 ℃≤Δ T of 1mm unit＜4.0 ℃, coefficient of heat insulation k is defined as the II level;
During the 4.0 ℃≤Δ T of 1mm unit＜6.0 ℃, coefficient of heat insulation k is defined as the III level;
During Δ T 〉=6.0 of 1mm unit ℃, coefficient of heat insulation k is defined as the IV level.
2. sheet material class (the heat-insulating material of thickness 〉=10mm)
When the thickness of block or sheet material is 1cm≤H＜10cm, under the infrared light supply irradiation 1h of 250W condition
During Δ T＜3.0 of 1cm unit ℃, coefficient of heat insulation k is defined as the I level;
During the 3.0 ℃≤Δ T of 1cm unit＜6.0 ℃, coefficient of heat insulation k is defined as the II level;
During the 9.0 ℃≤Δ T of 1cm unit＜9.0 ℃, coefficient of heat insulation k is defined as the III level;
During Δ T 〉=9.0 of 1cm unit ℃, coefficient of heat insulation k is defined as the IV level.
This cover effect of heat insulation for building material evaluation method science, simple, practical is convenient to promote.
The present invention does not address part and is applicable to prior art.
Provide specific embodiments of the invention below, but the present invention is not subjected to the restriction of embodiment.
Embodiment 1
The detection of insulating moulding coating effect of heat insulation.
The preparation sample panel: will about 50g coating sample evenly being coated in weight at twice is 524.7g, 525.3g, and 526.8g is of a size of on the square sheet glass of 300 * 300 * 3mm, and the quality of dry back coating is respectively 21.5g, 21.8g, 22.2g.After coating is finished for the first time, apply the second time etc. carrying out behind the coating bone dry, the time interval of twice brushing is 4h; At ambient temperature, behind the sample panel air dry 48h, make the detected sample plate.
The sample panel test: the testing sample plate is positioned on the sample grillage of pick-up unit, the coat side of sample panel upwards; The stopping device door is opened the temperature polling instrument power supply, and the record initial temperature is opened infrared lamp (100W), timing simultaneously, the temperature in beginning time recording heating chamber, coating upper surface, carrier board lower surface and the moist closet and over time.The test duration of each sample panel is 1h.After mensuration is finished, test data is carried out data processing, mean value is 8.5 ℃ when calculating test 60min, and draws the change curve (referring to Fig. 5) of heat time heating time and effect of heat insulation.
This coating average thickness is 0.37mm after measured, and the effect of heat insulation or the performance evaluation of this material of effect of heat insulation standard evaluation of formulating according to the present invention are the IV level.
The detection of putty effect of heat insulation.
The preparation sample panel: is 534.2g with the even at twice blade coating of about 100g putty sample in weight, 535.3g, and 537.6g is of a size of on the square sheet glass of 300 * 300 * 3mm, and the quality of dry back putty is respectively 48.5g, 50.2g, 51.8g.After for the first time having scraped putty, carry out the Puttying second time after waiting bone dry, the time interval of twice brushing is no less than 6h; At ambient temperature, behind the sample panel air dry 48h, make the detected sample plate.
The sample panel test: the sample panel of test specimen to be measured is positioned on the sample grillage of pick-up unit, and the coat side of coating sample upwards; The stopping device door is opened the recording instrument without paper power supply, and the record initial temperature is opened infrared lamp (100W), timing simultaneously, the temperature in beginning time recording heating chamber, putty layer upper surface, carrier board lower surface and the moist closet and over time.The test duration of each sample panel is 1h.After mensuration is finished, test data is carried out data processing, mean value is 9.0 ℃ when calculating test 60min, and draws the change curve (referring to Fig. 6) of heat time heating time and effect of heat insulation.
This coating average thickness is 0.86mm after measured, and the effect of heat insulation or the performance evaluation of this material of effect of heat insulation standard evaluation of formulating according to the present invention are the IV level.
Embodiment 3
The detection of sepiolite cream pasty state coating material effect of heat insulation.
The preparation sample panel: it is 514.2g in weight that sepiolite pastes sample that will about 150g divides three even blade coatings, 515.6g, 516.3g, be of a size of on the square sheet glass of 300 * 300 * 3mm, the weight of dry back coating is respectively 143.4g, 145.6g, 146.3g.Be divided into blade coating three times, after for the first time blade coating is finished, etc. carrying out blade coating and the blade coating for the third time second time behind the coating bone dry.The time interval of twice blade coating is no less than 8h; At ambient temperature, behind the sample panel air dry 48h, obtain the detected sample plate, carry out Performance Detection.
The sample panel test: the sample panel of test specimen to be measured is positioned on the sample grillage of pick-up unit, and the coat side of coating sample upwards; The stopping device door is opened the recording instrument without paper power supply, and the record initial temperature is opened infrared lamp (100W), timing simultaneously, the temperature in beginning time recording heating chamber, coating upper surface, carrier board lower surface and the moist closet and over time.The test duration of each sample panel is 1h.After mensuration is finished, test data is carried out data processing, mean value is 8.6 ℃ when calculating test 60min, and draws the change curve of heat time heating time and effect of heat insulation.
This coating average thickness is 1.8mm after measured, and the effect of heat insulation or the performance evaluation of this material of effect of heat insulation standard evaluation of formulating according to the present invention are the III level.
Natural talcum dusty material effect of heat insulation detects.
Sample panel preparation: natural talcum dusty material sample that will about 500g adds water furnishing pasty state, and dividing three even blade coatings is 1174.2g in weight, 1159.6g, 1196.3g, being of a size of on the sheet glass of 450 * 450 * 3mm, the weight of dry back coating is respectively 483.4g, 485.6g, 476.3g.Be divided into blade coating three times, after for the first time blade coating is finished, etc. carrying out blade coating and the blade coating for the third time second time behind the coating bone dry.The time interval of twice blade coating is no less than 8h; At ambient temperature, behind the sample panel air dry 48h, obtain the detected sample plate, carry out Performance Detection.
The sample panel test: the sample panel of test specimen to be measured is positioned on the sample grillage of pick-up unit, and the coat side of coating sample upwards; The stopping device door is opened the recording instrument without paper power supply, and the record initial temperature is opened infrared lamp (250W), timing simultaneously, the temperature in beginning time recording heating chamber, coating upper surface, carrier board lower surface and the moist closet and over time.The test duration of each sample panel is 1h.After mensuration is finished, test data is carried out data processing, mean value is 4.4 ℃ when calculating test 60min, and draws the change curve of heat time heating time and effect of heat insulation.
After measured this to be coated with average layer thickness be 1.3mm, the effect of heat insulation or the performance evaluation of this material of effect of heat insulation standard evaluation of formulating according to the present invention are the II level.
The detection of asbestos insulation board effect of heat insulation.
Sample panel preparation: with average thickness is that the asbestos insulation board sample of 3.8mm is cut into three of flat boards that are of a size of 450 * 450mm, makes the detected sample plate.
Sample panel test: the sample panel of test specimen to be measured is positioned on the sample grillage of pick-up unit, the stopping device door, open the recording instrument without paper power supply, the record initial temperature, open infrared lamp, timing simultaneously, the temperature in time recording heating chamber, the upper and lower surface of sheet asbestos and the moist closet and over time.The test duration of each sample panel is 1h.After mensuration is finished, test data is carried out data processing, mean value is 17.3 ℃ when calculating test 60min, and draws the change curve of heat time heating time and effect of heat insulation.
The effect of heat insulation standard evaluation of formulating according to the present invention, the effect of heat insulation of this material or performance evaluation are the III level.
The detection of magnesite composite insulation boards effect of heat insulation.
Sample panel preparation: average thickness 3.2cm magnesite composite insulation boards sample is cut into the size of 450 * 450mm, makes three of detected sample plates simultaneously.
Sample panel test: the sample panel of test specimen to be measured is positioned on the sample grillage of pick-up unit, the stopping device door, open the recording instrument without paper power supply, the record initial temperature, open infrared lamp, timing simultaneously, the temperature in time recording heating chamber, the upper and lower surface of magnesite composite insulation boards and the moist closet and over time.The test duration of each sample panel is 1h.After mensuration is finished, test data is carried out data processing, mean value is 16.8 ℃ when calculating test 60min, and draws the change curve of heat time heating time and effect of heat insulation.
The effect of heat insulation standard evaluation of formulating according to the present invention, the effect of heat insulation of this material or performance evaluation are the II level.
Embodiment 7
The exterior wall detection of compression polystyrene foam warming plate effect of heat insulation.
Sample panel preparation: average thickness 4.8cm compression polystyrene foam warming plate is cut into the sample panel that is of a size of 450 * 450mm, makes three of detected sample plates simultaneously.
Sample panel test: the sample panel of test specimen to be measured is positioned on the sample grillage of pick-up unit, the stopping device door, open the recording instrument without paper power supply, the record initial temperature, open infrared lamp, timing simultaneously, the temperature in time recording heating chamber, the upper and lower surface of polystyrene foam warming plate and the moist closet and over time.The test duration of each sample panel is 1h.After mensuration is finished, test data is carried out data processing, mean value is 40.8 ℃ when calculating test 60min, and draws the change curve of heat time heating time and effect of heat insulation.
The effect of heat insulation standard evaluation of formulating according to the present invention, the effect of heat insulation of this material or performance evaluation are the III level.
Embodiment 8:
The ceiling detection of polystyrene foam warming plate effect of heat insulation.
Sample panel preparation: average thickness 6.8cm polystyrene foam warming plate is cut into the sample panel that is of a size of 450 * 450mm, makes three of detected sample plates simultaneously.
Sample panel test: the sample panel of test specimen to be measured is positioned on the sample grillage of pick-up unit, the stopping device door, open the recording instrument without paper power supply, the record initial temperature, open infrared lamp, timing simultaneously, the temperature in time recording heating chamber, the upper and lower surface of polystyrene foam warming plate and the moist closet and over time.The test duration of each sample panel is 1h.After mensuration is finished, test data is carried out data processing, mean value is 42.3 ℃ when calculating test 60min, and draws the change curve of heat time heating time and effect of heat insulation.
The effect of heat insulation standard evaluation of formulating according to the present invention, the effect of heat insulation of this material or performance evaluation are the III level.
Claims (7)
1. effect of heat insulation for building material pick-up unit, comprise the digital display temperature meter that casing and casing upper surface are installed, described casing is divided into upper box and lower box, the sample grillage that can place the specimen plate is arranged between the upper and lower casing, the front of upper box is furnished with hollow double-layer seal door, its excess-three face and end face are the hollow double-wall structure, and the center is equipped with heating source in the end face, and the wall of lower box and bottom surface are the double-wall structure of interlayer filling heat insulator; Have the detection duct respectively in the center and the middle place thereof of a sidewall separately at upper and lower casing, be separately installed with the upper, middle and lower temperature sensor in the duct; On two sidewalls of lower box symmetry, be symmetrically installed with two supports below the sample grillage, support is separately installed with spring near center-side, spring supports symmetrical to stick the middle temperature sensor on specimen plate lower surface respectively, temperature sensor inserts with the detection duct that detection duct symmetric position is opened from the sidewall of described lower box in another, and described each temperature sensor all is electrically connected with described digital display temperature meter; The sidewall of upper box reaches the louvre that has inside and outside cinclides dislocation on the another side sidewall symmetrical with it.
2. effect of heat insulation for building material pick-up unit according to claim 1 is characterized in that described digital display temperature meter links to each other with computer by interface.
3. effect of heat insulation for building material pick-up unit according to claim 1, the double wall thickness that it is characterized in that the wall of described lower box and bottom surface is greater than the wall of upper box and the double wall thickness of end face; Described louvre is 6-12, diameter 8-12mm.
4. effect of heat insulation for building material detection method, this detection method is used claim 1,2 or 3 described effect of heat insulation for building material pick-up units, and adopts following steps:
1). the preparation of specimen plate
(1) preparation of sheet material class testing of materials sample panel: sheet material class material is cut into the specimen plate of rectangle, and thickness H is 3～100mm;
(2) preparation of cream pastes class testing sample panel: the cream pastes divide 2-3 time by moulding, blade coating, brush or be sprayed on the standard vector plate, make uniform specimen plate; Described standard vector plate is meant and is of a size of 300 * 300mm that thickness is glass plate, ceramic wafer or the sheet metal of 3mm;
(3) preparation of coating class testing of materials sample panel: coating divide 2-3 time by blade coating, brush or be sprayed on the standard vector plate, make uniform specimen plate;
2). the detection of specimen plate
(1) opens described pick-up unit door, the specimen plate is positioned on the sample grillage, and in described, install the upper surface temperature sensor on the sample panel upper surface position of temperature sensor correspondence;
(2) close the pick-up unit door, start detects, and is not less than 1 hour detection time;
(3), provide the opinion rating of the effect of heat insulation for building material of surveying by standard according to testing result.
5. effect of heat insulation for building material detection method according to claim 4, it is characterized in that described specimen plate is three of parallel manufacturing, error requirements between three blocks of specimen plates is: the length and width scale error of sheet material class testing of materials sample panel is no more than ± 2mm, and thickness H error is no more than ± 0.025H; The standard vector plate error requirements of cream pastes and coating class testing of materials sample panel is same as described sheet material class testing of materials sample panel, and the quality W of itself is 30～60g, and error is no more than ± 0.025W.
6. according to claim 4 or 5 described effect of heat insulation for building material detection methods, the time interval that it is characterized in that described cream pastes and per twice coating of coating class testing of materials sample panel is not less than 4h, the gained sample panel is at ambient temperature more than the air dry 48h, weigh again behind the bone dry, calculate and write down the quality W of its material itself.
7. the evaluation method of an effect of heat insulation for building material, the data that this evaluation method is detected based on the described effect of heat insulation for building material detection method of claim 4, according to coefficient of heat insulation k value size effect of heat insulation for building material is carried out the evaluation of I-IV level:
In the formula: k---coefficient of heat insulation, unit K/mm;
T1---the temperature absolute value of specimen plate heating surface, K;
T2---the absolute value of the temperature of the non-heating surface of specimen plate, K;
T3---the absolute value of temperature in the moist closet, K;
The clean thickness of H---construction material sample plate (sheet material or coating), the mm of unit;
The evaluation index of concrete I-IV level is:
(1) coating (layer) class (the heat-insulating material of thickness＜10mm)
For the carrier board that is of a size of 300 * 300mm, when coating quality is 200 ± 5g/m
2, under the infrared light supply irradiation 1h of 100W condition,
During Δ T＜2.0 of 1mm unit ℃, coefficient of heat insulation k is defined as the I level;
During the 2.0 ℃≤Δ T of 1mm unit＜4.0 ℃, coefficient of heat insulation k is defined as the II level;
During the 4.0 ℃≤Δ T of 1mm unit＜6.0 ℃, coefficient of heat insulation k is defined as the III level;
During Δ T 〉=6.0 of 1mm unit ℃, coefficient of heat insulation k is defined as the IV level;
(2) sheet material class (the heat-insulating material of thickness 〉=10mm)
When the thickness of block or sheet material is 1cm≤H＜10cm, under the infrared light supply irradiation 1h of 250W condition,
During Δ T＜3.0 of 1cm unit ℃, coefficient of heat insulation k is defined as the I level;
During the 3.0 ℃≤Δ T of 1cm unit＜6.0 ℃, coefficient of heat insulation k is defined as the II level;
During the 9.0 ℃≤Δ T of 1cm unit＜9.0 ℃, coefficient of heat insulation k is defined as the III level;
During Δ T 〉=9.0 of 1cm unit ℃, coefficient of heat insulation k is defined as the IV level.
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