CN111089836A - Detection method for detecting existing external thermal insulation system of external wall by adopting resiliometer - Google Patents
Detection method for detecting existing external thermal insulation system of external wall by adopting resiliometer Download PDFInfo
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- CN111089836A CN111089836A CN202010024477.9A CN202010024477A CN111089836A CN 111089836 A CN111089836 A CN 111089836A CN 202010024477 A CN202010024477 A CN 202010024477A CN 111089836 A CN111089836 A CN 111089836A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/04—Measuring adhesive force between materials, e.g. of sealing tape, of coating
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/40—Investigating hardness or rebound hardness
- G01N3/52—Investigating hardness or rebound hardness by measuring extent of rebound of a striking body
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0076—Hardness, compressibility or resistance to crushing
- G01N2203/0083—Rebound strike or reflected energy
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Abstract
The invention relates to a detection method for detecting an existing external thermal insulation system by using a resiliometer, which comprises the following steps: s1, selecting a complete area of the external thermal insulation system of the external wall as a calibration area; s2, collecting rebound values at not less than ten different positions in the calibration area, calculating an average value and a standard deviation, taking the average value minus the standard deviation as a lower reference limit, and taking the average value plus the standard deviation as an upper reference limit; s3, setting a detection area measuring point distance and collecting an actually measured rebound value by using a rebound instrument; and S4, comparing the actually measured resilience value with the reference interval, and judging the complete damage condition of the external thermal insulation system at the measured point. The invention provides a nondestructive testing method, so that the bonding quality and safety of an external thermal insulation system of an external wall are quantitatively tested and evaluated, and the safety is timely rectified to provide technical support.
Description
Technical Field
The invention relates to a nondestructive testing method for an existing building, in particular to a testing method for testing an existing external thermal insulation system by using a resiliometer.
Background
The external thermal insulation material and the system are various, such as thermal insulation board materials, thermal insulation mortar, field spraying and the like. At present, the quality of an external thermal insulation product and the construction quality are not controlled sufficiently, the product durability is poor, the control and management difficulty of the construction quality is high, and the maintenance problems after the quality guarantee period of the thermal insulation layer is over exist. In addition, accidents such as hollowing, cracking and falling of the external thermal insulation system of the external wall often occur due to other reasons such as the structural form of the building, climatic conditions, system materials and the like. The external thermal insulation system of the external wall falls off to cause casualties, economic loss and severe social influence. Therefore, the method has very practical significance for detecting and evaluating the bonding quality and safety of the external thermal insulation system of the external wall, safely treating, preventing falling and the like.
The existing detection and evaluation technology of the external thermal insulation system of the external wall is totally lacked and is not systematized. The field detection mainly adopts the technical specification of building envelope energy-saving field detection (DG/TJ 08-2038 + 2008) to detect the performance of the external thermal insulation system of the external wall, and comprises the steps of measuring thermal defects by an infrared thermal imaging method, testing the thickness of the thermal insulation layer by a core drilling sampling method and the like.
For the internal damage condition of the external thermal insulation system of the external wall, an infrared thermal imaging method and a knocking method are mostly adopted on site. Wherein, the infrared thermal imaging method is only suitable for detecting and detecting large-size defects; the striking force and the judgment criterion of the striking method have no quantitative standard and are completely based on the experience of detection personnel, and the method can detect only one point at a time, so that the detection efficiency is low for a large-area external wall external thermal insulation system. Therefore, no quantitative detection technology for the safety of the external thermal insulation system of the external wall exists at present.
With the continuous occurrence of accidents of the external thermal insulation system, a detection method with quantitative judgment standards is urgently needed to guide the safety evaluation and the subsequent improvement of the external thermal insulation system.
Disclosure of Invention
The invention aims to provide a nondestructive condition detection method aiming at common defects in the existing external thermal insulation system, so as to provide technical support for rapidly detecting and evaluating the bonding quality and safety of the external thermal insulation system and timely performing safety improvement.
The invention adopts the following technical scheme:
a detection method for detecting an existing external thermal insulation system by using a resiliometer comprises the following steps:
s1, selecting a complete area of the external thermal insulation system of the external wall as a calibration area;
s2, collecting rebound values at not less than ten different positions in the calibration area, calculating an average value and a standard deviation, taking the average value minus the standard deviation as a lower reference limit, and taking the average value plus the standard deviation as an upper reference limit;
s3, setting the measuring point distance of the detection area and collecting the actually measured rebound value, which is called as the actually measured value below;
and S4, comparing the actually measured resilience value with the reference interval, and judging the complete damage condition of the external thermal insulation system at the measured point.
Preferably, in the step S1, the selected intact region of the exterior wall external thermal insulation system has a flat surface without cracks or repair traces, and has a uniform temperature field distribution in the infrared thermal imaging photo and an area of not less than 100cm2And not more than 1m2。
Preferably, in step S2, if the maximum value of the rebound values in the calibration area exceeds 25% of the minimum value, the calibration area needs to be searched again and a reference value needs to be obtained; in step S2, the average value of the rebounds in the calibration area should be 35% to 65% of the fixed value of the rebound instrument rate.
Preferably, in step S3, the distance between any two test points in the detection area is not less than 5cm and not more than 25 cm; in the step S4, if the measured value is between the lower reference limit and the upper reference limit, it is determined that the external wall thermal insulation system at the measurement point is intact, otherwise, it is determined that the external wall thermal insulation system at the measurement point has a defect.
Preferably, the nominal kinetic energy and the measurement range of the resiliometer are determined according to the materials of the external thermal insulation system, and the nominal kinetic energy is not more than 1J.
The invention has the beneficial effects that: the detection method for detecting the existing external thermal insulation system by using the resiliometer is provided, the damage condition of the external thermal insulation system can be rapidly and quantitatively judged, the detection efficiency and accuracy are improved, and a basis is provided for subsequent maintenance of the external thermal insulation system.
Drawings
FIG. 1 is a schematic structural diagram of an auxiliary device for detecting an existing external thermal insulation system by using a resiliometer.
Fig. 2 is a schematic view of the bottom structure of the bottom plate of the auxiliary device.
Fig. 3 is a schematic view of a slide rail structure.
Fig. 4 is a schematic view of the upper structure of the cartridge.
Fig. 5 is a schematic view of the bottom structure of the card seat.
FIG. 6 is a cross-sectional view of a test piece for manufacturing a thin-plastered EPS board external thermal insulation system with defects.
Reference numerals: 1. a base plate; 2. a slide rail; 3. a card holder; 4. a chute on the bottom plate; 5. screws are fixed on the slide rails; 6. the back of the bottom plate is fixedly connected with a connecting plate; 7. a bolt hole for fixing; 8. a groove is formed in the side surface of the sliding rail; 9. moving the buckle; 10. a fixed ferrule; 11. a rebound instrument fixing bolt; 12. a clamping groove is formed in the bottom of the clamping seat; 13. a screw is fixed on the clamping seat; a1, a base layer, A2, an adhesive, A3, an EPS board, A4, a glass fiber net, A5, a thin finishing layer, A6 and a facing coating.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
Referring to fig. 1-6, the auxiliary equipment for detecting the existing external thermal insulation system of the external wall by using the resiliometer comprises a bottom plate 1; the front surface of the bottom plate 1 is fixedly provided with a plurality of clamping seats 3, and the back surface is fixedly provided with a connecting part for fixedly connecting with external equipment; the clamp seat 3 is provided with a group of movable buckles 9 which are limited in the clamp seat 3 and can move relative to the clamp seat 3, and the movable buckles 9 are used for directly clamping the resiliometer; the inner side of the fixed hoop 10 is fixed with the outer side of the movable buckle 9, and the rebound apparatus is fixed on the clamping seat 3 through the radial clamping force of the hoop.
Referring to fig. 4-5, the card holder 3 is plate-shaped, and a guide groove for the movable buckle 9 to slide is formed in the card holder.
With continued reference to fig. 4-5, the open side of the retainer clip 10 is clamped by a resiliometer retainer bolt 11.
Referring to fig. 1-5, a group of parallel sliding grooves 4 is fixedly arranged on the bottom plate 1 along the X direction; a group of slide rails 2 which are parallel along the Y direction slide along the slide grooves 4; the clamping seat 3 is in sliding fit with the sliding rail 2 through a clamping groove 12 at the bottom of the clamping seat; a clamping groove fixing screw 13 penetrates through the side wall of the clamping groove, a groove 8 is formed in the side face of the sliding rail 2 along the length direction, and the clamping groove fixing screw 13 corresponds to the groove 8 in position.
Referring to fig. 1 and 3, a set of screws 5 is disposed at the top of the slide rail 2 for fixing the slide rail 2 and the sliding groove 4.
Referring to fig. 2, the connecting member includes a pair of fixing connecting plates 6, and the fixing connecting plates 6 are provided with a plurality of bolt holes 7 for fixedly connecting with external equipment.
In this embodiment, the external device is a robot arm or a robot.
In this embodiment, see fig. 4, the inside of the clamp 10 is welded to the outside of the moving catch 9.
The detection method for detecting the auxiliary equipment of the existing external wall external thermal insulation system by adopting the resiliometer comprises the following steps:
s1, selecting a good area of the external thermal insulation system as a calibration area, wherein the area has a flat surface without cracks and repair traces, and is uniformly distributed in a temperature field with an area not less than 100cm in an infrared thermal imaging photo2And not more than 1m2。
Step S2, collecting rebound values at not less than ten different positions in the calibration area, calculating the average value and the standard deviation, taking the average value minus the standard deviation as a lower reference limit, and taking the average value plus the standard deviation as an upper reference limit; the average value of the rebound in the calibration area is 35% -65% of the fixed value of the rebound rate, otherwise, the rebound rate is replaced.
S3, arranging measuring points in the horizontal direction and the vertical direction in a detection area, wherein the distance between the two measuring points is not less than 5cm and not more than 25 cm; moving the sliding rails 2 on the bottom plate 1 along the sliding grooves 4, and rotating the screws 5 when the distance between the sliding rails is equal to the vertical distance between the preset measuring points so as to fix the sliding rails 2; clamping the clamping grooves 12 of the clamping seats 3 on the grooves 8 of the sliding rail 2, moving the clamping seats 3 until the distance between the clamping seats 3 in the same row is equal to the transverse distance of a preset point, rotating the screws 13, and tightly clamping the clamping grooves 12 at the bottoms of the clamping seats 3 on the grooves 8 of the sliding rail 2; after all the clamping seats 3 are fixed at a preset position, the bottoms of the resiliometers can be placed on the clamping seats 3, the buckles 9 are moved to be tightly attached to the periphery of the resiliometers, finally, the hoops 10 are sleeved on the periphery of the resiliometers, and the hoops 10 are fixed on the periphery of the resiliometers by using bolts 11, so that the resiliometers are fixed on the clamping seats 3; if loading mechanical equipment such as a wall climbing robot and the like exists, the back fixing connecting plate 6 and the bolt holes 7 of the bottom plate 1 can be used for connecting with other equipment.
And S4, collecting actual measurement resilience values at each measurement point by using a resiliometer and auxiliary equipment, avoiding a surface damage area during collection, judging that the external wall external thermal insulation system at the measurement point is intact if the actual measurement values are between a lower reference limit and an upper reference limit, and otherwise judging that the external wall external thermal insulation system at the measurement point has defects.
The nominal kinetic energy and the measurement range of the resiliometer are determined according to the material of the external thermal insulation system, and the nominal kinetic energy is not more than 1J.
A specific test example is shown below:
step one, manufacturing a defective EPS board thin-plastered external thermal insulation system test piece of an external wall:
referring to FIG. 6, the test piece conditions are that C30 concrete shear wall A1 is adopted for ① base wall, the thickness is 200mm, the width and the height are 2150mm and 1800mm respectively, ② adhesive A2 is polymer mortar, the thickness specification is not specified and is executed according to the conventional process requirements, an EPS board A3 with the thickness of ③ 50mm, a ④ glass fiber net A4 (the mass per unit area is not less than 130g/M2), a ⑤ thin finishing layer A5 is polymer mortar with the thickness of 3mm-7mm (the glass fiber net 4 is positioned in a thin finishing layer 5), a ⑥ finishing coating A6 is common M5 or M10 finishing mortar, the thickness is executed according to the conventional process requirements, and ⑦ preset defects are adopted between the outermost insulating layer and the finishing coating A6, and floating soil is paved, plastic paper is arranged or preset holes are arranged.
Step two, collecting the rebound value of the intact area of the EPS board thin plastering test piece to determine a reference interval:
a rebound value is acquired by adopting a brick rebound instrument with the calibrated kinetic energy of 0.7J and the measurement range of 6-30 MPa, and the calibration value of the rebound instrument is 74. A350-500 mm area is selected as a calibration area in the intact surface area of the test piece, resilience values are collected at optional thirty positions in the calibration area, and the average value is 32.5, the mean value is 43.9% of the rate set value, and the standard deviation is 2.7.
Step three, setting the distance between the measuring points of the detection area, arranging a clamping seat on the auxiliary equipment, installing a rebound tester, collecting a rebound value and judging the sound condition of the measuring points:
and determining that the lower reference limit is 29.8 and the upper reference limit is 35.2 according to the rebound average value and the standard deviation measured in the intact area, judging that the point is intact when the detected rebound value is between the upper limit and the lower limit, and otherwise, judging that the external thermal insulation system of the external wall has defects.
While the preferred embodiments of the present invention have been described, those skilled in the art will appreciate that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (5)
1. A detection method for detecting an existing external thermal insulation system by using a resiliometer is characterized by comprising the following steps: the method comprises the following steps:
s1, selecting a complete area of the external thermal insulation system of the external wall as a calibration area;
s2, collecting rebound values at not less than ten different positions in the calibration area, calculating an average value and a standard deviation, taking the average value minus the standard deviation as a lower reference limit, and taking the average value plus the standard deviation as an upper reference limit;
s3, setting a detection area measuring point distance and collecting an actually measured rebound value by using a rebound instrument;
and S4, comparing the actually measured resilience value with the reference interval, and judging the complete damage condition of the external thermal insulation system at the measured point.
2. The method for detecting the existing external thermal insulation system of the external wall by using the resiliometer according to claim 9, wherein: in the step S1, the selected intact region of the external thermal insulation system of the external wall has a smooth surface without cracks and repair traces, and has uniform temperature field distribution and an area not less than 100cm in the infrared thermal imaging photo2And not more than 1m2。
3. The method for detecting the existing external thermal insulation system of the external wall by using the resiliometer according to claim 1, wherein: in step S2, if the maximum value of the rebound values in the calibration area exceeds 25% of the minimum value, the calibration area needs to be searched again and a reference value needs to be obtained; in step S2, the average value of the rebounds in the calibration area should be 35% to 65% of the fixed value of the rebound instrument rate.
4. The method for detecting the existing external thermal insulation system of the external wall by using the resiliometer according to claim 1, wherein: in the step S3, the distance between any two test points in the detection area is not less than 5cm and not more than 25 cm; in the step S4, if the measured value is between the lower reference limit and the upper reference limit, it is determined that the external wall thermal insulation system at the measurement point is intact, otherwise, it is determined that the external wall thermal insulation system at the measurement point has a defect.
5. The method for detecting the existing external thermal insulation system of the external wall by using the resiliometer according to claim 1, wherein: the nominal kinetic energy and the measurement range of the resiliometer are determined according to the material of the external thermal insulation system, and the nominal kinetic energy is not more than 1J.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010024477.9A CN111089836B (en) | 2020-01-10 | 2020-01-10 | Detection method for detecting existing external thermal insulation system of external wall by adopting resiliometer |
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| CN202010024477.9A CN111089836B (en) | 2020-01-10 | 2020-01-10 | Detection method for detecting existing external thermal insulation system of external wall by adopting resiliometer |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207066906U (en) * | 2017-08-15 | 2018-03-02 | 无锡建设监理咨询有限公司 | A kind of servicing unit that concrete bouncing back instrument can be applied in combination |
| CN208505761U (en) * | 2018-08-02 | 2019-02-15 | 安徽恒信建设工程管理有限公司 | A kind of reisilometer multiple spot detection auxiliary stand |
| CN209511274U (en) * | 2018-12-22 | 2019-10-18 | 宁波永享不锈钢管道有限公司 | A kind of load bearing wall pipeline jig |
-
2020
- 2020-01-10 CN CN202010024477.9A patent/CN111089836B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207066906U (en) * | 2017-08-15 | 2018-03-02 | 无锡建设监理咨询有限公司 | A kind of servicing unit that concrete bouncing back instrument can be applied in combination |
| CN208505761U (en) * | 2018-08-02 | 2019-02-15 | 安徽恒信建设工程管理有限公司 | A kind of reisilometer multiple spot detection auxiliary stand |
| CN209511274U (en) * | 2018-12-22 | 2019-10-18 | 宁波永享不锈钢管道有限公司 | A kind of load bearing wall pipeline jig |
Non-Patent Citations (2)
| Title |
|---|
| 广东省建设工程质量安全监督检总站: "广东省混凝土结构实体检验技术导则（试行）", 《建筑监督检测与造价》 * |
| 陈海彬等: "建筑结构强度超声回弹逆回归区间融合评定法", 《中国铁道科学》 * |
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