CN107870220B - Asphalt mastic overflowing amount testing device and testing method - Google Patents
Asphalt mastic overflowing amount testing device and testing method Download PDFInfo
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- CN107870220B CN107870220B CN201710860236.6A CN201710860236A CN107870220B CN 107870220 B CN107870220 B CN 107870220B CN 201710860236 A CN201710860236 A CN 201710860236A CN 107870220 B CN107870220 B CN 107870220B
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- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
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Abstract
The invention discloses a testing device and a testing method for asphalt mastic overflow quantity, wherein the testing device for asphalt mastic overflow quantity comprises: a test bench; the test tray is arranged on the test board through the lifting driving part, and the heating unit is arranged below the test tray and used for heating the test tray; the pressurizing unit is arranged above the test disc and used for pressurizing a sample to be tested on the test disc; a temperature sensor for measuring a surface temperature of the test tray; the input unit is used for receiving the test temperature, the test pressure and the test time input by a user; a control unit. This testing arrangement of asphalt mastic outflow can accurate measurement modified asphalt waterproofing membrane hot melt construction seam department asphalt mastic outflow.
Description
Technical Field
The invention belongs to the field of building waterproofing, and particularly relates to a device and a method for testing the overflow amount of asphalt mastic.
Background
At present, in the relevant national construction and acceptance standards, the modified asphalt waterproof coiled material constructed by adopting a hot melting method has clear requirements. Wherein 4.3.8 regulations in GB50208-2011 inspection and acceptance Specification of underground waterproof engineering are as follows: 1. the coiled material heated by the flame heater is uniform, and the coiled material cannot be heated insufficiently or burnt through; 2. rolling and spreading the surface of the coiled material immediately after hot melting, removing air below the coiled material, and firmly adhering; 4. the hot-melt modified asphalt sizing material should be overflowed from the seam part of the coiled material, and the coiled material is firmly adhered and tightly sealed. Item 3 of 6.2.6 in GB50207-2012 specification for quality acceptance of roofing engineering: the hot-melt modified asphalt mastic should overflow from the seam of the coiled material, and the width of the overflowing modified asphalt mastic is preferably 8 mm. The specification of 4.3.17 in GB50108-2008 underground engineering waterproof technical Specification: the elastomer modified asphalt waterproof coiled material and the modified asphalt polyethylene tire waterproof coiled material are constructed by a hot melting method, and should be heated uniformly, the coiled material should not be heated insufficiently or burnt through, and the hot-melted modified asphalt should overflow from the lap joint part. Article 3 of the specification 5.4.8 in GB50345-2012 roofing engineering specification: the hot-melted modified asphalt cement overflows from the lap joint part to the degree, and the width of the overflowing modified asphalt cement is preferably 8mm and is preferably uniform and straight.
According to the standards, although the fire baking temperature, time and extrusion effect are not specifically required in the relevant national standards for construction and acceptance, the coiled material is required not to be heated insufficiently or less to penetrate, and the coiled material is immediately rolled, laid and deaerated to ensure firm adhesion. In the actual construction process, construction is not completely executed according to the construction standard requirement due to various factors such as the progress of the construction, the influence of weather, the technical inexperience of construction workers and the like, so that the construction acceptance is unqualified.
Meanwhile, the modified asphalt waterproof coiled material can cause that the asphalt mastic overflowing amount after being baked can not meet the requirement due to different raw materials and production processes. The hot-melt modified asphalt waterproof coiled material is a building waterproof coiled material which is prepared by taking a polyester tire, a glass fiber tire and a glass fiber reinforced polyester tire as tire bases, taking SBS, APP, APAO, APO and other modifier modified asphalt as base materials and coating the surface of the base materials with a polyethylene film, sand grains and mineral aggregates. Some manufacturers can also produce qualified products by modifying asphalt by using waste rubber powder, but the overflowing amount of asphalt mastic after the asphalt mastic is baked by fire is less, and the construction standard and the acceptance standard cannot be met. Moreover, some manufacturers do not directly add fillers to the modified asphalt to produce products, although the products are baked, the asphalt cement overflows more, but the physical properties of the products are unqualified, the waterproof effect cannot be ensured, and the asphalt cement overflows more, so that the products are convenient to construct and generate certain misleading to the market.
The asphalt mastic overflow amount at the seam of the hot-melt construction of the modified asphalt waterproof coiled material can not meet the standard requirements due to the construction and the material performance, and meanwhile, no special test method and test instrument is used for testing the asphalt mastic overflow amount at the seam of the hot-melt construction of the modified asphalt waterproof coiled material at the present stage. If the asphalt mastic overflow amount of the lap joint edge after construction is unqualified, the material or construction problem can not be confirmed, and disputes are easy to generate.
Disclosure of Invention
The invention provides a testing device and a testing method for asphalt mastic overflow amount, and the testing device for asphalt mastic overflow amount can accurately measure asphalt mastic overflow amount at a seam of hot-melt construction of a modified asphalt waterproof coiled material.
In order to achieve the above object, according to an aspect of the present invention, there is provided an asphalt mastic overflow amount testing apparatus, including:
a test bench;
the test disc is arranged on the test bench through a lifting driving part and can ascend or descend under the driving of the lifting driving part;
the heating unit is arranged below the test disc and used for heating the test disc;
the pressurizing unit is arranged above the test disc and used for pressurizing a sample to be tested on the test disc;
a temperature sensor for measuring a surface temperature of the test tray;
the input unit is used for receiving the test temperature, the test pressure and the test time input by a user;
the control unit, the control unit includes temperature controller and pressure controller, temperature controller is used for comparing the surface temperature of test disc with experimental temperature to start or close according to the temperature comparison result the heating unit, pressure controller is used for controlling the pressurization unit to the sample that awaits measuring applys test pressure.
Preferably, the pressurizing unit comprises a manipulator, a pneumatic rod and a mounting plate, the mounting plate is fixed on the test board, the manipulator is connected to the mounting plate through the pneumatic rod and can be driven by the pneumatic rod to approach or leave the test tray from the top.
Preferably, the manipulator comprises a palm center and a plurality of telescopic mechanical fingers, and the plurality of telescopic mechanical fingers are arranged at the edge of the palm center.
Preferably, the test device further comprises a timing unit, and the control unit is used for comparing the time measured by the timing unit with the test time and turning off the heating unit and the pressurizing unit when the time measured by the timing unit is equal to the test time.
Preferably, the temperature sensor is an infrared temperature measuring probe arranged on the mounting plate, and the pressure controller is a pneumatic control valve.
Preferably, the surface of the test disc is provided with a rectangular test area, the size of the rectangular test area is 100 × 100mm, wherein two mutually perpendicular straight lines are arranged at the central point of the rectangular test area, and the two straight lines are respectively parallel to four sides of the rectangle and are provided with scales. According to another aspect of the present invention, there is provided a method for testing asphalt mastic overflow, comprising:
1) cutting a sample to be tested, pretreating the sample to be tested, and measuring the initial size of the sample to be tested;
2) inputting test temperature, test pressure and test time;
3) placing a sample to be tested on the test disc, and heating and pressurizing the sample to be tested;
4) measuring the post-test size in the sample to be tested after the test time is reached;
5) and calculating the asphalt mastic overflowing amount according to the initial size and the post-test size.
Preferably, the pretreatment of the sample to be tested comprises: and maintaining the sample to be tested for more than 20 hours in an environment with the temperature of 23 +/-2 ℃.
Preferably, the method further comprises the following steps: the test disc is heated prior to placing the test sample on the test disc.
Preferably, the surface of the test disc is provided with a rectangular test area, the size of the rectangular test area is 100 × 100mm, two mutually perpendicular straight lines are arranged at the midpoint, the two straight lines are respectively parallel to four sides of the rectangle, and the rectangular test area is provided with scales. After reaching the test time, measuring the post-test size in the sample to be tested includes:
raising the test tray;
taking down the test disc, and curing the test disc for 1-3 hours in an environment with the temperature of 23 +/-2 ℃;
and measuring the post-test size in the sample to be tested through the scales.
The invention has the beneficial effects that: through the arrangement of the heating unit, the pressurizing unit and the input unit, the test temperature, time and pressure can be accurately controlled, the applicability of the test method to the asphalt mastic overflow amount at the seam of the hot-melting construction of the modified asphalt waterproof coiled material in actual construction application is improved, the result difference caused by different construction fire baking temperatures, time and extrusion effects in the actual construction use process is reduced, and the asphalt mastic overflow amount at the seam of the hot-melting construction of the modified asphalt waterproof coiled material is measured more accurately.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts throughout.
FIG. 1 shows a schematic diagram of a testing apparatus for asphalt mastic overrun in accordance with one embodiment of the invention.
FIG. 2 shows a test profile according to one embodiment of the invention.
Figure 3 shows a schematic view of a web lap joint condition according to one embodiment of the present invention.
Description of reference numerals:
11. an input unit; 21. resistance heating pipes; 22. an infrared temperature measuring probe; 31. a test tray; 321. a manipulator finger; 325. a palm center; 33. a pneumatic piston rod.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the following describes preferred embodiments of the present invention, it should be understood that the present invention may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
According to one aspect of the invention, the invention discloses a testing device for asphalt mastic overflow quantity, which comprises:
a test bench;
the test disc is arranged on the test board through the lifting driving part and can ascend or descend under the driving of the lifting driving part;
the heating unit is arranged below the test disc and used for heating the test disc;
the pressurizing unit is arranged above the test disc and used for pressurizing a sample to be tested on the test disc;
a temperature sensor for measuring a surface temperature of the test tray;
the input unit is used for receiving the test temperature, the test pressure and the test time input by a user;
and the control unit comprises a temperature controller and a pressure controller, the temperature controller is used for comparing the surface temperature of the test disc with the test temperature and starting or closing the heating unit according to the temperature comparison result, and the pressure controller is used for controlling the pressurizing unit to apply the test pressure to the sample to be tested.
Specifically, through the arrangement of the heating unit, the pressurizing unit and the input unit, the test temperature, time and pressure can be accurately controlled, the applicability of the test method to the asphalt mastic overflow amount at the seam of the hot-melting construction of the modified asphalt waterproof coiled material in actual construction application is improved, the result difference caused by different construction fire baking temperatures, time and extrusion effects in the actual construction use process is reduced, and the asphalt mastic overflow amount at the seam of the hot-melting construction of the modified asphalt waterproof coiled material is measured more accurately.
The heating unit heats the test disc to a test temperature and controls the temperature, and the error is within 2 ℃. The temperature sensor monitors the surface temperature of the test tray.
More preferably, the heating unit heats the test disc through the resistance heating pipe, the infrared temperature probe monitors the surface temperature of the test disc, and the temperature controller controls the resistance heating pipe to heat or stop heating the test disc according to the surface temperature of the test disc.
Specifically, the lifting drive member is a pneumatic piston rod.
Preferably, the pressurizing unit comprises a manipulator, a pneumatic rod and a mounting plate, the mounting plate is fixed on the test board, the manipulator is connected to the mounting plate through the pneumatic rod and can be driven by the pneumatic rod to be close to or far away from the test tray from the upper part.
Specifically, the pressurizing unit applies a set test pressure to the sample to be tested through the manipulator and the pneumatic rod.
Preferably, the manipulator comprises a palm center and a plurality of telescopic mechanical fingers, and the plurality of telescopic mechanical fingers are arranged at the edge of the palm center.
Preferably, the test device further comprises a timing unit, and the control unit is used for comparing the time measured by the timing unit with the test time and turning off the heating unit and the pressurizing unit when the time measured by the timing unit is equal to the test time.
Preferably, the temperature sensor is an infrared temperature measuring probe arranged on the mounting plate, and the pressure controller is a pneumatic control valve.
Preferably, the surface of the test disc is provided with a rectangular test area with a size of 100 × 100mm, wherein two mutually perpendicular straight lines are arranged at the central point of the rectangular test area, and the two straight lines are respectively parallel to four sides of the rectangle and are provided with scales. Specifically, during testing, a sample to be tested is placed in a rectangular testing area of the testing disc through the manipulator, and the distance between the edge of the sample to be tested and the edge of the rectangular testing area is within 0.5 mm.
According to another aspect of the present invention, there is provided a method for testing asphalt mastic overflow, comprising:
1) cutting a sample to be tested, pretreating the sample to be tested, and measuring the initial size of the sample to be tested;
2) inputting test temperature, test pressure and test time;
3) placing a sample to be tested on a test disc, and heating and pressurizing the sample to be tested;
4) measuring the post-test size in the sample to be tested after the test time is reached;
5) and calculating the asphalt mastic overflowing amount according to the initial size and the size after the test.
Specifically, a sample to be tested is cut at the overlapping edge of the modified asphalt waterproof coiled material constructed by adopting a hot melting method, and the lower surface of the sample is marked. And during testing, the lower surface of the sample to be tested is placed on the test disc.
The construction method of the modified asphalt waterproof coiled material is mainly divided into hot melting and self-adhesion. The lap joint of the coiled materials constructed by the self-adhesion method is mainly bonded by the self-adhesion of the coiled materials, and the lap joint can be sealed. The coiled material constructed by the hot melting method is mainly bonded by melting asphalt mastic after baking, the joint needs to be sealed by extruded asphalt mastic or substances with consistent compatibility, and the extruded asphalt mastic is mostly adopted for sealing in the industry. The seam is the position where two webs overlap. The lap joint is generally classified into a long-side lap joint and a short-side lap joint. The two sides of the coiled material in the length direction are 80-100mm as overlapping edges.
More preferably, the size of the cut test specimen is 100mm × 100 mm. The size error of the sample to be measured is +/-0.5 mm, and the lap joint edge of the coiled material is taken when cutting.
Specifically, a sample to be tested is placed on a test disc, the center of the sample to be tested corresponds to the center of the test disc, and the test disc is heated to a test temperature by a heating unit, wherein the error is within 2 ℃.
Specifically, the test temperature may be set to 300 ℃, which is a conventional hot melt construction temperature.
Specifically, the test time may be set to 5s, and the time may be counted when the sample to be tested is in contact with the test tray.
Furthermore, after the sample to be tested is cut, the mass of the sample to be tested can be weighed, and the mass a Kg/square meter of the sample to be tested per unit area can be further obtained.
Specifically, the test pressure is determined according to the mass of the sample to be tested, and if the mass of the sample to be tested in unit area is a Kg/square meter, the set pressure is 10 aN.
Specifically, the initial size is labeled L1And the post-test dimension is marked L2If so, the asphalt mastic overflows in an amount of L ═ L (L)2-L1)/2
As a preferred scheme, the pretreatment of the sample to be tested comprises: and (3) curing the sample to be tested for more than 20 hours in an environment with the temperature of 23 +/-2 ℃.
Preferably, the test method further comprises: the test disc is heated prior to placing the test sample on the test disc.
Preferably, the surface of the test disc is provided with a rectangular test area with the size of 100 × 100mm, two mutually perpendicular straight lines are arranged at the midpoint, and the two straight lines are respectively parallel to four sides of the rectangle and are provided with scales. After the test time is reached, measuring the post-test dimensions in the test sample to be tested includes:
lifting the test disc;
taking down the test disc, and curing the test disc for 1-3 hours in an environment with the temperature of 23 +/-2 ℃;
the post-test dimensions in the test specimen to be measured are measured by means of the scale.
Specifically, after the test is finished, in order to avoid the continuous influence of the residual heat on the test tray, the manipulator moves upwards, and the lifting drive part lifts the test tray upwards at the same time.
Examples
FIG. 1 shows a schematic diagram of a testing apparatus for asphalt mastic overrun in accordance with one embodiment of the invention. FIG. 2 shows a test profile according to one embodiment of the invention. Figure 3 shows a schematic view of a web lap joint condition according to one embodiment of the present invention.
As shown in fig. 1-3, the asphalt mastic overflow amount test equipment comprises:
a test bench;
the test disc 31 is arranged on the test bench through a pneumatic piston rod 33, and can be driven by the pneumatic piston rod 33 to ascend or descend;
the heating unit is arranged below the test disc and heats the test disc 31 through the resistance heating pipe 21;
the pressurizing unit is arranged above the test disc 31 and used for pressurizing a sample to be tested on the test disc 31;
a temperature sensor for measuring the surface temperature of the test tray 31;
the input unit 11, the input unit 11 is used for receiving the test temperature, the test pressure and the test time input by the user;
and the control unit comprises a temperature controller and a pressure controller, the temperature controller is used for comparing the surface temperature of the test disc with the test temperature and starting or closing the resistance heating pipe 31 of the heating unit according to the temperature comparison result, and the pressure controller is used for controlling the pressurizing unit to apply the test pressure to the sample to be tested.
The pressurizing unit comprises a manipulator, a pneumatic rod and a mounting plate, the mounting plate is fixed on the test board, the manipulator is connected to the mounting plate through the pneumatic rod, and the manipulator can be driven by the pneumatic rod to be close to or far away from the test disc from the upper side.
The manipulator comprises a palm 325 and a plurality of telescopic manipulator fingers 321, wherein the plurality of telescopic manipulator fingers 321 are arranged on the edge of the palm.
The test device also comprises a timing unit, and the control unit is used for comparing the time measured by the timing unit with the test time and closing the heating unit and the pressurizing unit when the time measured by the timing unit is equal to the test time.
Wherein the temperature sensor is an infrared temperature probe 22 arranged on the mounting plate, and the pressure controller is a pneumatic control valve.
The surface of the test disc 31 is provided with a rectangular test area with a size of 100 × 100mm, two straight lines perpendicular to each other are arranged at the midpoint of the test area, and the two straight lines are parallel to four sides of the rectangle and are provided with scales. The testing device is used for measuring the asphalt mastic overflow amount of the hot-melt construction joint of the modified asphalt waterproof coiled material, and the method is realized by adopting a method for simulating actual construction in a laboratory, taking normally produced SBSIYPEPE 4 as an example, and comprises the following specific implementation steps:
s1: cutting a sample to be tested at the overlapping edge of the coiled material, wherein the size of the sample is 100mm multiplied by 100 mm; weighing a to-be-measured sample with the mass of 4.52Kg per square meter; and (3) curing the sample to be tested for 24 hours in an environment of (23 +/-2) DEG C.
S2: setting a test temperature, a test time and a test pressure on the input unit 11; the test temperature is 300 ℃, the test time is 5s, and the test pressure is 45.2N;
s3: the heating unit heats the test disc with scales to a test temperature and controls the temperature, and the error is within 2 ℃;
s4: placing the cut sample to be tested in a rectangular test area of a test disc, wherein the middle point of the sample to be tested corresponds to the center of the test disc, heating and pressurizing the sample to be tested, and quickly removing the test disc after the heating and pressurizing are finished;
wherein, the sample to be tested is placed in the rectangular test area by the manipulator 32 during the test. At this time, the timing unit starts timing, the hand finger 321 is released, and the test is started. A set test pressure is applied to the sample to be tested through the manipulator palm 325. After the test is finished, in order to avoid the continuous influence of the residual heat of the resistance heating tube 21 on the test tray, the manipulator 32 moves away, and the control device controls the pneumatic piston rod 33 to lift the test tray 31 upwards.
S5: and (5) maintaining the test disc for 2 hours in an environment of 23 +/-2 ℃, and measuring the post-test size of the sample to be tested through scales. And acquiring data of the two tested sizes through the scales of the rectangular test area, and taking the average value of the two data as a test result to be accurate to 0.1 mm.
And taking two samples to be measured, repeating the steps, and taking the average value of three measurements as a final result.
The final results are shown in the following table:
note: because the single-layer test is different from the double-layer lap joint in actual construction, the asphalt mastic overflow amount is half of that in actual construction.
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (10)
1. A testing arrangement of asphalt mastic outflow volume, characterized in that, the device includes:
a test bench;
the test disc is arranged on the test bench through a lifting driving part and can ascend or descend under the driving of the lifting driving part;
the heating unit is arranged below the test disc and used for heating the test disc;
the pressurizing unit is arranged above the test disc and used for pressurizing a sample to be tested on the test disc;
a temperature sensor for measuring a surface temperature of the test tray;
the input unit is used for receiving the test temperature, the test pressure and the test time input by a user;
the control unit comprises a temperature controller and a pressure controller, the temperature controller is used for comparing the surface temperature of the test disc with the test temperature and starting or closing the heating unit according to the temperature comparison result, and the pressure controller is used for controlling the pressurizing unit to apply the test pressure to the sample to be tested;
the surface of the test disc is provided with a rectangular test area, wherein two straight lines which are perpendicular to each other are arranged at the central point of the rectangular test area, the two straight lines are parallel to the four sides of the rectangle respectively, and scales are arranged on the two straight lines.
2. The asphalt mastic overflow amount testing device according to claim 1, wherein the pressurizing unit includes a manipulator, a pneumatic rod, and a mounting plate, the mounting plate is fixed to the testing table, and the manipulator is connected to the mounting plate through the pneumatic rod and can be driven by the pneumatic rod to approach or separate from the testing tray from above.
3. The asphalt mastic overflow amount testing device according to claim 2, wherein the manipulator comprises a palm core and a plurality of retractable mechanical fingers, and the retractable mechanical fingers are arranged on the edge of the palm core.
4. The asphalt mastic overflow amount testing device according to claim 1, further comprising a timing unit, wherein the control unit is configured to compare the time measured by the timing unit with the test time, and to turn off the heating unit and the pressurizing unit when the time measured by the timing unit is equal to the test time.
5. The asphalt mastic overflow amount testing device of claim 2, wherein the temperature sensor is an infrared temperature probe provided on the mounting plate, and the pressure controller is a pneumatic control valve.
6. The asphalt mastic overflow amount testing device of claim 1, wherein the rectangular test area is 100 x 100mm in size.
7. A test method using the asphalt mastic overflow amount test apparatus according to any one of claims 1 to 6, the test method comprising:
1) cutting a sample to be tested, pretreating the sample to be tested, and measuring the initial size of the sample to be tested;
2) inputting test temperature, test pressure and test time;
3) placing a sample to be tested on the test disc, and heating and pressurizing the sample to be tested;
4) measuring the tested size of the sample to be tested after the test time is reached;
5) and calculating the asphalt mastic overflowing amount according to the initial size and the post-test size.
8. The method of claim 7, wherein pre-conditioning the sample to be tested comprises: and maintaining the sample to be tested for more than 20 hours in an environment with the temperature of 23 +/-2 ℃.
9. The test method of claim 7, further comprising: the test disc is heated prior to placing the test sample on the test disc.
10. The method according to claim 7, wherein the surface of the test tray is provided with a rectangular test area, the size of the rectangular test area is 100 x 100mm, wherein two mutually perpendicular straight lines are arranged at the central point of the rectangular test area, the two straight lines are respectively parallel to four sides of the rectangle and are provided with scales, and the step of measuring the post-test size in the test sample after the test time is reached comprises the following steps:
raising the test tray;
taking down the test disc, and curing the test disc for 1-3 hours in an environment with the temperature of 23 +/-2 ℃;
and measuring the post-test size of the sample to be tested through the scales.
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| CN105319238A (en) * | 2015-11-16 | 2016-02-10 | 长安大学 | Infrared heating testing device and testing method for bituminous pavement |
| CN106404542A (en) * | 2016-12-01 | 2017-02-15 | 山东路达试验仪器有限公司 | Asphalt mixture Marshall stability tester |
| CN106770447A (en) * | 2017-02-16 | 2017-05-31 | 安徽省交通控股集团有限公司 | The measurement apparatus and method of thermal conductivity factor under a kind of asphalt different temperatures |
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| CN107870220A (en) | 2018-04-03 |
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