CN111855550A - Aging test method for joint compound - Google Patents
Aging test method for joint compound Download PDFInfo
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- CN111855550A CN111855550A CN202010762453.3A CN202010762453A CN111855550A CN 111855550 A CN111855550 A CN 111855550A CN 202010762453 A CN202010762453 A CN 202010762453A CN 111855550 A CN111855550 A CN 111855550A
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
- G01N17/004—Investigating resistance of materials to the weather, to corrosion, or to light to light
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Abstract
The invention relates to the field of joint compound test methods, and particularly discloses a joint compound aging test method, which comprises the following steps: (1) preparing a base material: mixing cement, medium sand and water to form cement mortar, and then forming test base materials, wherein the number of the test base materials is two; (2) arranging a test groove: arranging a test groove in the middle of the upper end face of each test substrate in the step (1), placing isolation cushion blocks at two ends of the test groove and cleaning the test groove; (3) preparation of a test piece: extruding the joint filling material into the test groove and filling the test groove to complete injection molding; avoiding the generation of bubbles during the extrusion process; (4) calculating the test time: and (3) calculating the aging time:
Description
Technical Field
The invention relates to the field of joint compound test methods, in particular to a joint compound aging test method.
Background
The joint compound can perfectly repair the cracks or damages on the surface of the floor, and the surface of the floor can be coated with paint, so that the floor has good waterproofness. The joint filling material is prepared with cement, quartz sand, pigment and metal salt of organic acid in certain proportion, and is used mainly in filling joint of wall brick, floor tile, inner wall brick, stone and square brick. Joint compound can be divided into many kinds according to different use scenes or use objects, and one kind of joint compound is cement concrete joint compound. The cement concrete joint filling material is mainly used for filling joints on cement concrete pavements, and has the problems that the cement concrete joint filling material is exposed outdoors for a long time, the working condition environment is complex, the mechanical property is reduced, the surface of a colloid is cracked, a white sealant can be yellowed, and a black sealant can flow black water after being washed by rainwater.
If the influence of ultraviolet rays on the aging of the joint compound can be calculated, the final maintenance preparation can be carried out in advance, and corresponding measures can be adopted to delay the aging of the joint compound. However, no relevant test method exists in China at present.
Disclosure of Invention
The invention aims to provide a joint compound aging test method to test the influence of ultraviolet irradiation on the aging performance of the joint compound.
In order to achieve the purpose, the invention adopts the following technical scheme: a joint compound aging test method comprises the following steps:
(1) preparing a base material: mixing cement, medium sand and water to form cement mortar, and then forming test base materials, wherein the number of the test base materials is two;
(2) arranging a test groove: arranging a test groove in the middle of the upper end face of each test substrate in the step (1), placing isolation cushion blocks at two ends of the test groove and cleaning the test groove;
(3) preparation of a test piece: extruding the joint filling material into the test groove, filling the test groove with the joint filling material, and completing injection molding to form a test piece; avoiding the generation of bubbles during the extrusion process;
(4) calculating the test time: and (3) calculating the aging time:
(4) and (3) testing: fixing the test piece in the step (3) on a light receiving piece, installing the light receiving piece with the test piece on a test instrument, starting the instrument, and simultaneously recording the starting time;
(5) and (3) performance testing: and (4) closing the instrument when the test time is up, taking out the joint compound and carrying out performance measurement after aging.
The working principle and the beneficial effects of the basic scheme are that: the inventor researches a test method for researching the influence of ultraviolet rays on the aging of a joint filling material, and particularly the joint filling material of cement concrete, on the aging of the joint filling material, the joint filling material can be subjected to photo-oxidation aging under the long-term irradiation of the ultraviolet rays of natural light, so that the mechanical performance of the joint filling material is reduced.
According to the scheme, the detection time is calculated through a test instrument and a specific formula, various performances of the joint compound are tested, the tested indexes comprise indexes such as bonding strength, bonding elongation and damage degree, then the detected indexes are compared with the indexes of a normal joint compound, the influence of ultraviolet rays on the aging degree of the joint compound can be effectively obtained through the test method, and therefore reference is provided for the maintenance condition of the joint compound after the service life of the joint compound.
In this example, the calculation was performed with a natural aging time of 30 years, in which the average sunshine time per day was 10 hours.
Further, the anti-sticking material is a polyethylene film.
Further, the mass part ratio of the cement to the medium sand to the water is 1:1.6-1.9: 0.8-1.1. Through a plurality of tests, the inventor finds that the base material prepared by mixing the cement, the medium sand and the water according to the proportion has better effect.
Further, the mass part ratio of the cement to the medium sand to the water is 1: 1.8: 0.9. through a plurality of tests, the inventor finds that the base material prepared by mixing the cement, the medium sand and the water according to the proportion has better effect.
Further, before preparing the test piece, the joint compound is placed for more than 24 hours under the standard condition.
Further, in the step (3), the mixing is completed within 30min after the mixing. The injection molding is completed within 30min to prevent the test piece from being coated with film and thus affecting the test result.
Further, in the step (2), the cross section of the isolation cushion block is 12mm × 12 mm.
Detailed Description
The following is further detailed by way of specific embodiments:
a joint compound aging test method comprises the following steps:
(1) preparing a base material: mixing cement, medium sand and water to form cement mortar, and then forming test base materials, wherein the number of the test base materials is two;
(2) arranging a test groove: arranging a test groove in the middle of the upper end face of each test substrate in the step (1), placing isolation cushion blocks at two ends of the test groove and cleaning the test groove;
(3) preparation of a test piece: extruding the joint filling material into the test groove and filling the test groove to complete injection molding; avoiding the generation of bubbles during the extrusion process;
(4) calculating the test time: and (3) calculating the aging time:
(4) and (3) testing: fixing the test piece in the step (3) on a light receiving piece, installing the light receiving piece with the test piece on a test instrument, starting the test instrument, and simultaneously recording the starting time;
(5) and (3) performance testing: and (4) closing the instrument when the test time is up, taking out the joint compound and carrying out performance measurement after aging.
In the step (2), the cross section of the isolation cushion block is 12mm multiplied by 12 mm.
Wherein, the anti-sticking material is a polyethylene film.
The mass part ratio of the cement to the medium sand to the water is 1: 1.8: 0.9.
in the step (3), before the test piece is prepared, the joint compound is placed for more than 24 hours under the standard condition, and the joint compound is completed within 30min after being mixed. The injection molding is completed within 30min to prevent the test piece from being coated with film and thus affecting the test result.
Example two
A joint compound aging test method comprises the following steps:
(1) preparing a base material: mixing cement, medium sand and water to form cement mortar, and then forming test base materials, wherein the number of the test base materials is two;
(2) arranging a test groove: arranging a test groove in the middle of the upper end face of each test substrate in the step (1), placing isolation cushion blocks at two ends of the test groove and cleaning the test groove;
(3) preparation of a test piece: extruding the joint filling material into the test groove and filling the test groove to complete injection molding; avoiding the generation of bubbles during the extrusion process;
(4) calculating the test time: and (3) calculating the aging time:
(4) and (3) testing: fixing the test piece in the step (3) on a light receiving piece, installing the light receiving piece with the test piece on a test instrument, starting the test instrument, and simultaneously recording the starting time;
(5) and (3) performance testing: and (4) closing the instrument when the test time is up, taking out the joint compound and carrying out performance measurement after aging.
In the step (2), the cross section of the isolation cushion block is 12mm multiplied by 12 mm.
Wherein, the anti-sticking material is a polyethylene film.
The mass part ratio of the cement to the medium sand to the water is 1:1.6: 0.8.
In the step (3), before the test piece is prepared, the joint compound is placed for more than 24 hours under the standard condition, and the joint compound is completed within 30min after being mixed. The injection molding is completed within 30min to prevent the test piece from being coated with film and thus affecting the test result.
EXAMPLE III
A joint compound aging test method comprises the following steps:
(1) preparing a base material: mixing cement, medium sand and water to form cement mortar, and then forming test base materials, wherein the number of the test base materials is two;
(2) arranging a test groove: arranging a test groove in the middle of the upper end face of each test substrate in the step (1), placing isolation cushion blocks at two ends of the test groove and cleaning the test groove;
(3) preparation of a test piece: extruding the joint filling material into the test groove and filling the test groove to complete injection molding; avoiding the generation of bubbles during the extrusion process;
(4) calculating the test time: and (3) calculating the aging time:
(4) and (3) testing: fixing the test piece in the step (3) on a light receiving piece, installing the light receiving piece with the test piece on a test instrument, starting the test instrument, and simultaneously recording the starting time;
(5) and (3) performance testing: and (4) closing the instrument when the test time is up, taking out the joint compound and carrying out performance measurement after aging.
In the step (2), the cross section of the isolation cushion block is 12mm multiplied by 12 mm.
Wherein, the anti-sticking material is a polyethylene film.
The mass part ratio of the cement to the medium sand to the water is 1:1.9: 1.1.
In the step (3), before the test piece is prepared, the joint compound is placed for more than 24 hours under the standard condition, and the joint compound is completed within 30min after being mixed. The injection molding is completed within 30min to prevent the test piece from being coated with film and thus affecting the test result.
Example four
A joint compound aging test method comprises the following steps:
(1) preparing a base material: mixing cement, medium sand and water to form cement mortar, and then forming test base materials, wherein the number of the test base materials is two;
(2) arranging a test groove: arranging a test groove in the middle of the upper end face of each test substrate in the step (1), placing isolation cushion blocks at two ends of the test groove and cleaning the test groove;
(3) preparation of a test piece: extruding the joint filling material into the test groove and filling the test groove to complete injection molding; avoiding the generation of bubbles during the extrusion process;
(4) calculating the test time: and (3) calculating the aging time:
(4) and (3) testing: fixing the test piece in the step (3) on a light receiving piece, installing the light receiving piece with the test piece on a test instrument, starting the test instrument, and simultaneously recording the starting time;
(5) and (3) performance testing: and (4) closing the instrument when the test time is up, taking out the joint compound and carrying out performance measurement after aging.
In the step (2), the cross section of the isolation cushion block is 12mm multiplied by 12 mm.
Wherein, the anti-sticking material is a polyethylene film.
The mass part ratio of the cement to the medium sand to the water is 1:1.6: 1.1.
In the step (3), before the test piece is prepared, the joint compound is placed for more than 24 hours under the standard condition, and the joint compound is completed within 30min after being mixed. The injection molding is completed within 30min to prevent the test piece from being coated with film and thus affecting the test result.
The joint compound used in the above examples was a silicone joint compound.
The experimental instrument used in the above examples was a UV-ii type non-generic material artificial accelerated aging tester.
In the above examples, AUV represents the intensity of ultraviolet rays in the atmosphere (mW/cm)2) ERS means the experimental ultraviolet radiation intensity (mW/cm)2) (ii) a T represents the test aging time (h).
The tests of the above examples were all conducted in the GuangdongIs carried out in a region where the ultraviolet intensity (AUV) in the atmosphere is 1.63mW/cm2(ii) a The ultraviolet lamp tubes adopted in the test of the embodiment are all 40W and each cm2The ultraviolet intensity received by the joint filling material is measured by an ultraviolet measuring instrument, and the actually measured ultraviolet radiation intensity is 368 mW/cm2。
In the above embodiment, three groups of light receiving sheets are simultaneously detected in each group of tests, and two test pieces are fixed on each group of light receiving sheets.
The test pieces tested in the above examples were tested for their performance, and the test results and the performance test results of the joint compound before the test are shown in table 1:
TABLE 1
As can be seen from table 1, uv light affects the aging of the joint compound, and particularly the bond elongation of the joint compound. The testing method can effectively obtain the influence of ultraviolet rays on the aging degree of the joint compound through the special testing instrument and the special formula to calculate the detection time and test various performances of the joint compound, wherein the tested indexes comprise the indexes of bonding strength, bonding elongation, damage degree and the like, so that reference is provided for the maintenance condition of the joint compound after the service life of the joint compound.
The foregoing is merely an example of the present invention and common general knowledge in the art of designing and/or characterizing particular aspects and/or features is not described in any greater detail herein. It should be noted that, for those skilled in the art, without departing from the technical solution of the present invention, several variations and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (7)
1. A joint compound aging test method is characterized in that: the method comprises the following steps:
(1) preparing a base material: mixing cement, medium sand and water to form cement mortar, and then forming test base materials, wherein the number of the test base materials is two;
(2) arranging a test groove: arranging a test groove in the middle of the upper end face of each test substrate in the step (1), placing isolation cushion blocks at two ends of the test groove and cleaning the test groove;
(3) preparation of a test piece: extruding the joint filling material into the test groove, filling the test groove with the joint filling material, and completing injection molding to form a test piece; avoiding the generation of bubbles during the extrusion process;
(4) calculating the test time: and (3) calculating the aging time:
(4) and (3) testing: fixing the test piece in the step (3) on a light receiving piece, installing the light receiving piece with the test piece on a test instrument, starting the instrument, and simultaneously recording the starting time;
(5) and (3) performance testing: and (4) closing the instrument when the test time is up, taking out the joint compound and carrying out performance measurement after aging.
2. The joint compound aging test method of claim 1, wherein: the anti-sticking material is a polyethylene film.
3. The joint compound aging test method of claim 2, wherein: the mass part ratio of the cement to the medium sand to the water is 1:1.6-1.9: 0.8-1.1.
4. The joint compound aging test method of claim 3, wherein: the mass part ratio of the cement to the medium sand to the water is 1: 1.8: 0.9.
5. the joint compound aging test method of claim 4, wherein: before preparing the test piece, the joint compound is placed for more than 24 hours under the standard condition.
6. The joint compound aging test method of claim 5, wherein: in the step (3), the mixing is completed within 30min after the mixing.
7. The joint compound aging test method of claim 6, wherein: in the step (2), the cross section of the isolation cushion block is 12mm multiplied by 12 mm.
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| CN202010762453.3A CN111855550A (en) | 2020-07-31 | 2020-07-31 | Aging test method for joint compound |
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Citations (3)
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| GB2198576B (en) * | 1986-12-02 | 1990-07-25 | Sanyo Electric Co | Sealed type battery provided with safety valve means and method of manufacturing same |
| CN102219437A (en) * | 2011-05-11 | 2011-10-19 | 邓敬森 | Cement concrete material for rapid repairing of road and preparation method thereof |
| CN105347742A (en) * | 2015-11-13 | 2016-02-24 | 山东建筑大学 | Road crack repairing material |
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2020
- 2020-07-31 CN CN202010762453.3A patent/CN111855550A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2198576B (en) * | 1986-12-02 | 1990-07-25 | Sanyo Electric Co | Sealed type battery provided with safety valve means and method of manufacturing same |
| CN102219437A (en) * | 2011-05-11 | 2011-10-19 | 邓敬森 | Cement concrete material for rapid repairing of road and preparation method thereof |
| CN105347742A (en) * | 2015-11-13 | 2016-02-24 | 山东建筑大学 | Road crack repairing material |
Non-Patent Citations (4)
| Title |
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| 交通部水泥混凝土路面推广组: "《水泥混凝土路面研究》", 30 November 1995, 人民交通出版社 * |
| 伍杰 等: "聚氨酯裂缝修补材料Pucs路用性能研究", 《公路交通技术》 * |
| 寿崇琦 等: "水泥混凝土路面填缝材料的抗疲劳老化性能研究", 《公路》 * |
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