Method for testing construction performance of dry-mixed mortar in summer high-temperature environment

Abstract

The invention relates to a method for testing construction performance of dry-mixed mortar in a summer high-temperature environment, which comprises the following steps of: S1, taking usable time, scraping property and light receiving time as test indexes, and performing simulation test on a dry-mixed mortar sample to be tested; s2, a plurality of trained scoring persons are selected, and the test indexes are scored; and S3, comprehensively judging whether the construction performance of the to-be-detected dry-mixed mortar in the summer high-temperature environment is qualified or not according to a scoring result. By determining the test indexes of the construction performance quality of the dry-mixed mortar in the summer high-temperature environment, the influence of environmental factors on the test result can be reduced, the purpose of quickly and accurately detecting the construction performance of the dry-mixed mortar to be detected is achieved, the advantages and disadvantages of the construction performance of the dry-mixed mortar product in summer are objectively reflected, and the method has reference significance.

Description

Technical Field

[0001] The invention relates to the technical field of coatings, and in particular to a method for testing the construction performance of dry-mix mortar in a high-temperature environment in summer. Background Art

[0002] The performance of dry-mix mortar in high-temperature summer environments is a common problem in the coating process. Due to the high temperature, it is easier to cause defects on the surface of the dry-mix mortar layer, which ultimately affects the gloss and stain resistance of the upper coating, reducing its aesthetics. More seriously, it affects the waterproof penetration function of the upper coating, reduces the sealing of the upper coating, and eventually causes bubbles or even shedding of the upper coating. However, in the industry, there has been no specific testing and judgment on the construction performance indicators of dry-mix mortar in high-temperature summer environments, and it is impossible to provide a reference for better selection of dry-mix mortar for high-temperature summer use. Therefore, it is very important to develop a test method that can quickly and accurately test the construction performance of dry-mix mortar in high-temperature summer environments.

[0003] In view of this, the present invention is proposed. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a method for testing the construction performance of dry-mix mortar in a high temperature environment in summer.

[0005] The technical solution adopted by the present invention is:

[0006] The present invention provides a method for testing the construction performance of dry-mix mortar in a high-temperature environment in summer, comprising the following steps:

[0007] S1. Take the dry mortar sample to be tested for simulation test with the usable time, scraping performance and finishing time as the test indicators;

[0008] S2. Selecting a number of trained scorers to score the test indicators;

[0009] S3. Comprehensively judge whether the construction performance of the dry-mix mortar to be tested in a high-temperature environment in summer is qualified based on the scoring results.

[0010] The present invention proposes a method for testing the construction performance of dry-mix mortar in a high-temperature environment in summer. By determining the test indicators of the construction performance quality of the dry-mix mortar in a high-temperature environment in summer, the influence of environmental factors on the test results can be reduced, thereby achieving the purpose of quickly and accurately detecting the construction performance of the dry-mix mortar to be tested, and objectively reflecting the advantages and disadvantages of the summer construction performance of the dry-mix mortar product, which has practical reference significance.

[0011] Preferably, the usable time is tested by the following method: take 1 kg of the dry mortar sample to be tested, seal it in a plastic bucket, place it in an environment at a temperature of 50°C and heat it for 1.5 hours, take it out, observe whether there is a crusting phenomenon on the surface of the dry mortar sample to be tested, and gently press its surface with your fingers to observe whether the state of the dry mortar sample to be tested has changed significantly compared with before, and record the time from the completion of sample preparation to the appearance of crusting on the surface of the dry mortar sample to be tested or the obvious change of its state as the usable time.

[0012] Preferably, the scraping property is tested by the following method: apply one full coat to the dry mortar sample to be tested on a test panel, with a single coat thickness of less than 1 mm, and judge the feel of the scraping; after drying for 8 hours, apply a second full coat to judge the feel of the scraping and the peeling and scratching conditions.

[0013] Preferably, the light collection time is tested by the following method: start timing after the scraping is completed, and perform a light collection test from the top every 30 seconds after 1.5 minutes, and record the time until the light can no longer be collected as the light collection time.

[0014] The present invention provides objective and specific testing indicators and methods by simulating the influence of environmental factors during the use of dry-mix mortar, which is highly feasible and can more accurately test the construction performance of the dry-mix mortar in actual high-temperature summer environment applications.

[0015] Preferably, the preparation of the dry mortar sample to be tested includes the following steps: mixing the liquid and powder and stirring evenly, checking the state of the prepared sample, and taking the sample that can be easily picked up with a putty knife and does not fall when turned over and shaken lightly as the dry mortar sample to be tested.

[0016] Preferably, the preparation of the test sample used in the simulation test includes the following steps: cleaning the dust on the surface of the sample, wetting the surface of the sample, and after there is no visible water on the surface, using Japanese paper tape to stick an area of ​​1m×1m on the sample to obtain the test sample.

[0017] More preferably, the sample board is asbestos-free cement fiber board.

[0018] Preferably, the scoring criteria for the test indicators are divided into three levels: excellent, good, and poor, and each test indicator is judged to be qualified if the score reaches good level or above. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is the powder loss situation of Sample 1 and Sample 2 in Example 1 after construction. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Example 1

[0022] A method for testing the construction performance of dry-mix mortar in a high-temperature environment in summer, comprising the following steps:

[0023] S1. Take the dry mortar sample to be tested for simulation test, taking the usable time, scraping performance and finishing time as the test indicators.

[0024] The preparation of the dry mortar sample to be tested includes the following steps: mixing the liquid and powder and stirring evenly, checking the state of the prepared sample, and taking the sample that can be easily picked up with a putty knife and turned over and shaken lightly without falling (90° tilt, no obvious slippage for 10s) as the dry mortar sample to be tested.

[0025] The preparation of the test sample used in the simulation test includes the following steps: cleaning the dust on the surface of the sample (using asbestos-free cement fiberboard), wetting the surface of the sample, and after there is no visible water on the surface, using Japanese paper tape to stick an area of ​​1m×1m on the sample to obtain the test sample.

[0026] Among them, each test indicator is tested by the following methods:

[0027] The usable time can be tested by the following method: take 1kg of the dry-mix mortar sample to be tested, seal it in a plastic bucket, place it in an environment with a temperature of 50°C and heat it for 1.5 hours, take it out, observe whether there is any crusting on the surface of the dry-mix mortar sample to be tested, and gently press its surface with your fingers to observe whether the state of the dry-mix mortar sample to be tested has changed significantly compared with before, and record the time from the completion of sample preparation to the appearance of crusting on the surface of the dry-mix mortar sample or the obvious change of its state as the usable time.

[0028] The scraping property is tested by the following method: apply one full coat to the dry mortar sample to be tested on the test sample plate, with the thickness of a single coat within 1mm, and judge the feel of the scraping. After drying for 8 hours, apply a second full coat to judge the feel of the scraping and the presence of peeling and scratches.

[0029] The light collection time is tested by the following method: start timing after the scraping is completed, and after 1.5 minutes, perform a light collection test from the top every 30 seconds, and record the time until the light can no longer be collected as the light collection time.

[0030] S2. Select several trained scorers to score the test indicators.

[0031] S3. Comprehensively judge whether the construction performance of the dry-mix mortar to be tested in high temperature environment in summer is qualified based on the scoring results.

[0032] Among them, the scoring standards for test indicators are divided into three levels: excellent, good, and poor. The scores of various test indicators that reach good level or above are judged to be qualified.

[0033] In this embodiment, a typical scoring standard for the construction performance of dry-mix mortar in a high-temperature environment in summer is provided, and a table is prepared according to the test method of each dry-mix mortar construction performance test index in a high-temperature environment in summer, as shown in Table 1 below.

[0034] Table 1

[0035]

[0036] It can be seen from Table 1 that all test indicators of sample 1 have reached the good level and meet the construction performance requirements of high temperature in summer, while the test result of sample 2 is unqualified and is not suitable for construction in high temperature in summer.

[0037] Furthermore, the construction completion of Sample 1 and Sample 2 was tested and the results were recorded in Figure 1 .from Figure 1 It can be seen that the construction performance of sample 1 is normal, while sample 2 has powder falling off when touched by hand. This result is consistent with the test results in Table 1.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for testing the construction performance of dry-mix mortar in a high-temperature environment in summer, characterized in that: The following steps are involved: S1. Take the dry mortar sample to be tested for simulation test with the usable time, scraping performance and finishing time as the test indicators; S2. Selecting a number of trained scorers to score the test indicators; S3. Comprehensively judge whether the construction performance of the dry-mix mortar to be tested in a high-temperature environment in summer is qualified based on the scoring results.

2. The method for testing the construction performance of dry-mix mortar in a high temperature environment in summer according to claim 1, characterized in that: The usable time is tested by the following method: take 1 kg of the dry mortar sample to be tested, seal it in a plastic bucket, place it in an environment with a temperature of 50°C and heat it for 1.5 hours, take it out, observe whether there is a crusting phenomenon on the surface of the dry mortar sample to be tested, and gently press its surface with your fingers to observe whether the state of the dry mortar sample to be tested has changed significantly compared with before, and record the time from the completion of sample preparation to the appearance of crusting on the surface of the dry mortar sample to be tested or the obvious change of its state as the usable time.

3. The method for testing the construction performance of dry-mix mortar in a high temperature environment in summer according to claim 1, characterized in that: The scraping property is tested by the following method: apply one full coat to the dry mortar sample to be tested on the test sample plate, with the thickness of a single coat being within 1 mm, and judge the feel of the scraping; after drying for 8 hours, apply a second full coat to judge the feel of the scraping and the peeling and scratching conditions.

4. The method for testing the construction performance of dry-mix mortar in a high temperature environment in summer according to claim 1, characterized in that: The light collection time is tested by the following method: start timing after the scraping is completed, and perform a light collection test from the top every 30 seconds after 1.5 minutes, and record the time until the light can no longer be collected as the light collection time.

5. The method for testing the construction performance of dry-mix mortar in a high temperature environment in summer according to claim 1, characterized in that: The preparation of the dry-mixed mortar sample to be tested comprises the following steps: mixing the liquid material and the powder material and stirring evenly, checking the state of the prepared sample, and taking the sample that can be easily picked up with a putty knife and does not fall off when turned over and shaken lightly as the dry-mixed mortar sample to be tested.

6. The method for testing the construction performance of dry-mix mortar in a high temperature environment in summer according to claim 1 or 3, characterized in that: The preparation of the test sample used in the simulation test includes the following steps: cleaning the dust on the surface of the sample, wetting the surface of the sample, and after there is no visible water on the surface, using Japanese paper tape to stick an area of ​​1m×1m on the sample to obtain the test sample.

7. The method for testing the construction performance of dry-mix mortar in a high temperature environment in summer according to claim 6, characterized in that: The sample is asbestos-free cement fiberboard.

8. The method for testing the construction performance of dry-mix mortar in a high temperature environment in summer according to claim 1, characterized in that: The scoring standards for the test indicators are divided into three levels: excellent, good, and poor. The test indicators are considered qualified if they reach the good level or above.

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