Testing method for detecting anti-sagging performance of gypsum mortar

Abstract

The invention relates to the technical field of gypsum building materials, and particularly discloses a test method for detecting the anti-sagging performance of gypsum mortar, which comprises the following steps: (1) diffusivity detection: taking mortar powder, determining the water consumption required when the diffusivity is in a range of 165-170mm, obtaining mortar slurry, detecting the diffusivity of the mortar slurry, and recording the diffusivity d; (2) consistency detection: detecting the consistency value of the mortar slurry with the diffusivity of d, namely c; (3) calculating an anti-sagging value, wherein the anti-sagging value R is equal to d / c; (4) analyzing the anti-sagging performance of the mortar; according to the application, whether the stored gypsum mortar powder has the problem of poor sagging resistance or not can be correctly judged.

Description

Technical Field

[0001] The present application relates to the technical field of gypsum building materials, and more specifically, to a testing method for detecting the anti-sagging performance of gypsum mortar. Background Art

[0002] Gypsum mortar is a green and environmentally friendly building material made of semi-hydrated gypsum as the main cementing material, glass beads, sand and other functional small materials. After the gypsum mortar arrives at the construction site, it can be directly mixed with water for use. The mixed slurry is light and has strong adhesion. After solidification, the volume is stable and it is not easy to hollow or crack.

[0003] However, during the storage of finished gypsum mortar, the powder will automatically absorb moisture in the air and age. If the aging time is too long, the gypsum mortar and the base wall will have sagging problems due to weakened bonding. Gypsum mortar with sagging problems after aging is used for wall leveling construction, which will cause the final wall surface to be uneven and hollow. The uneven and hollow wall surface needs to be scraped and re-leveled later, resulting in serious waste of materials and manpower. Therefore, we need a test method to determine whether the anti-sagging performance of gypsum mortar is qualified. Summary of the invention

[0004] In order to correctly judge whether the gypsum mortar powder after storage has poor anti-sagging properties during the construction process, this patent application provides a test method for detecting the anti-sagging performance of gypsum mortar.

[0005] The present application provides a test method for detecting the anti-sagging performance of gypsum mortar, which adopts the following technical solution:

[0006] A test method for detecting the anti-sagging performance of gypsum mortar comprises the following steps:

[0007] (1) Diffusion test: Take mortar powder, determine the amount of water required when the diffusion is in the range of 165-170 mm, obtain mortar slurry, test the diffusion of the mortar slurry, and record the diffusion d;

[0008] (2) Consistency test: The consistency value of the mortar slurry with a diffusion degree of d is tested, which is c;

[0009] (3) Calculate the anti-sagging value: anti-sagging value R = d / c;

[0010] (4) Analysis of mortar anti-sagging performance:

[0011] When R < 2.1, there will be no sagging problem during mortar construction;

[0012] When 2.1≤R<2.25, the smaller the value, the less likely it is that the mortar will have sagging problems during construction, and the better the anti-sagging performance;

[0013] When 2.25≤R<2.4, the larger the value, the greater the possibility of sag problem in mortar construction, and the worse the anti-sag performance;

[0014] When 2.4≤R, sagging problems will occur during mortar construction.

[0015] Furthermore, when R<2.1, there will be no sag problem in mortar construction, which means that when R<2.1, there will definitely be no sag problem in mortar construction; when 2.4≤R, there will be sag problem in mortar construction, which means that when 2.4≤R, there will definitely be sag problem in mortar construction.

[0016] Furthermore, in the step (1), the diffusion degree is tested according to the method in GB / T 28627-2023 Plastering Gypsum. Further, in the step (1), the water consumption of the mortar powder is determined when the diffusion degree is 165-170 mm according to the test method of the standard diffusion water consumption in GB / T 28627-2023 Plastering Gypsum.

[0017] Furthermore, in the step (2), the consistency value is tested according to "JGJ 70-2009 Test Method for Basic Properties of Building Mortar".

[0018] In summary, this application has the following beneficial effects:

[0019] Traditionally, the judgment of whether the finished gypsum mortar after storage has poor anti-sagging properties in subsequent construction is based on the experience of the construction workers, which is highly subjective. When the workers are inexperienced or make mistakes in judgment, hollowing and cracking problems will occur on the wall after the material is applied to the wall. The wall needs to be scraped off and the construction needs to be repeated. The test method for detecting the anti-sagging performance of gypsum mortar described in this application can accurately judge whether the material has poor anti-sagging properties before construction by the distribution of the ratio of diffusion and consistency after the material is stirred. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is the mortar construction drawing of Example 1.

[0021] Figure 2 It is the mortar construction drawing of Example 4.

[0022] Figure 3 It is the mortar construction drawing of Example 5.

[0023] Figure 4 This is the mortar construction drawing of Example 6 DETAILED DESCRIPTION

[0024] The present application is further described in detail below with reference to the accompanying drawings and embodiments.

[0025] Examples 1 to 6

[0026] The gypsum mortar used in Examples 1 to 6 of the present application is the INOBO brand gypsum mortar (IB-GP800 produced by Jurong Factory), wherein the storage time of the gypsum mortar powder in different embodiments is different, as shown in Table 1;

[0027] Table 1 Storage schedule of gypsum mortar in each embodiment

[0028] Example Gypsum mortar powder Storage time / month Example 1 S1 0 Example 2 S2 1 Example 3 S3 3 Example 4 S4 3.5 Example 5 S5 4 Example 6 S6 6

[0029] Wherein, S1 is the gypsum mortar powder just produced. The detection results of different embodiments are shown in Table 2.

[0030] Table 2 Parameter test results of various embodiments

[0031] Example Gypsum mortar powder Water consumption d / mm c / mm R Whether it is hanging Example 1 S1 0.76 167 92 1.82 no Example 2 S2 0.74 169 84 2.01 no Example 3 S3 0.72 168 77 2.18 no Example 4 S4 0.71 167 73 2.29 yes Example 5 S5 0.70 167 69 2.42 yes Example 6 S6 0.65 168 58 2.90 yes

[0032] Among them, S1 gypsum mortar has excellent anti-sagging performance; this gypsum mortar is firmly bonded to all wall surfaces during on-site plastering construction, and there is no sagging problem after being applied to the wall. Figure 1 .

[0033] The anti-sagging performance of S2 gypsum mortar is generally very good. The gypsum mortar is firmly bonded to all wall surfaces during on-site plastering construction, and there is no sagging problem after being applied to the wall.

[0034] The anti-sagging performance of S3 is generally good. The gypsum mortar is firmly bonded to all wall surfaces during on-site plastering construction, and there is basically no sagging problem after being applied to the wall.

[0035] S4 has slightly poor anti-sagging performance. This gypsum mortar has strong adhesion to most wall surfaces during on-site plastering construction, but has insufficient adhesion to a small number of smooth shear walls, and some wall surfaces have sagging problems. Figure 2 .

[0036] S5 has poor anti-sagging performance. This gypsum mortar has a strong bond with most wall surfaces during on-site plastering construction, but has insufficient bonding with most shear walls, resulting in sagging problems. Figure 3 .

[0037] S6 has very poor anti-sagging performance. The gypsum mortar is not firmly bonded to most wall surfaces during on-site plastering construction, and has serious sagging problems. Figure 4 .

[0038] Depend on Figure 1-Figure 4 It can be seen that as the R value gradually increases, the sag problem of the mortar becomes more and more serious, and the anti-sag performance of the mortar becomes worse and worse.

[0039] Embodiments 7 to 12

[0040] The gypsum mortar used in Examples 7 to 12 of the present application is the Inobon brand gypsum mortar (IB-GP1000 produced by Jurong Factory), wherein the storage time of the gypsum mortar powder in different embodiments is different, as shown in Table 3;

[0041] Table 3 Storage schedule of gypsum mortar in each embodiment

[0042] Example Gypsum mortar powder Storage time / month Example 7 M1 0 Example 8 M2 1 Example 9 M3 3 Example 10 M4 3.5 Embodiment 11 M5 4 Example 12 M6 6

[0043] Wherein, M1 is the gypsum mortar powder just produced. The detection results of different embodiments are shown in Table 4.

[0044] Table 4 Parameter test results of various embodiments

[0045] Example Gypsum mortar powder Water consumption d / mm c / mm R Whether it is hanging Example 7 M1 0.68 166 88 1.88 no Example 8 M2 0.66 168 78 2.15 no Example 9 M3 0.64 168 75 2.24 yes Example 10 M4 0.63 166 71 2.34 yes Embodiment 11 M5 0.62 169 67 2.52 yes Example 12 M6 0.60 167 60 2.78 yes

[0046] Embodiments 13 to 18

[0047] The gypsum mortar used in Examples 13 to 18 of the present application is the INOBO brand gypsum mortar (IB-GP800 produced by Taicang Factory), wherein the storage time of the gypsum mortar powder in different embodiments is different, as shown in Table 5;

[0048] Table 5 Storage schedule of gypsum mortar in each embodiment

[0049] Example Gypsum mortar powder Storage time / month Embodiment 13 N1 0 Embodiment 14 N2 1 Embodiment 15 N3 3 Example 16 N4 3.5 Embodiment 17 N5 4 Embodiment 18 N6 6

[0050] Wherein, N1 is the gypsum mortar powder just produced. The detection results of different embodiments are shown in Table 6.

[0051] Table 6 Parameter test results of various embodiments

[0052]

[0053]

[0054] Examples 19 to 24

[0055] The gypsum mortar used in Examples 19 to 24 of the present application is the INOBO brand gypsum mortar (IB-GP1000 produced by Taicang Factory), wherein the storage time of the gypsum mortar powder in different embodiments is different, as shown in Table 7;

[0056] Table 7 Storage schedule of gypsum mortar in each embodiment

[0057] Example Gypsum mortar powder Storage time / month Embodiment 19 T1 0 Embodiment 20 T2 1 Embodiment 21 T3 3 Embodiment 22 T4 3.5 Embodiment 23 T5 4 Embodiment 24 T6 6

[0058] Wherein, T1 is the gypsum mortar powder just produced. The detection results of different embodiments are shown in Table 8.

[0059] Table 8 Parameter test results of various embodiments

[0060]

[0061]

[0062] Accurate letter detection

[0063] The number of embodiments Q with R < 2.1, 2.1 ≤ R < 2.25, 2.25 ≤ R < 2.4, and 2.4 ≤ R were collected respectively, and whether the mortar slurry with the corresponding R value had sagging was observed at the same time. The number of embodiments without sagging was recorded as q1, and the number of embodiments with sagging was recorded as q2, where q1 and q2 refer to the number of embodiments with corresponding sagging phenomena in the corresponding Q embodiments; the matching degree P of the R value and the sagging problem was calculated, and the calculation method was as follows:

[0064] P(R<2.1)=q1 / Q. P(2.1≤R<2.25)=q1 / Q. P(2.25≤R<2.4)=q2 / Q. P(2.4≤R)=q2 / Q. See Table 9 for details.

[0065] Table 9 R value judgment table for sag accuracy

[0066] R-value range Q q1 q2 P R＜2.1 6 6 0 1 2.1≤R＜2.25 6 5 1 0.83 2.25≤R＜2.4 5 1 4 0.8 2.4≤R 7 0 7 1

[0067] It can be seen from Table 9 that for the embodiments with R<2.1, there was no sag problem during the mortar construction, with an accuracy of 100%; for the embodiments with 2.4≤R, sag problems occurred during the mortar construction, with an accuracy of 100%; and when 2.1≤R<2.25, and 2.25≤R<2.4, although the accuracy did not reach 100%, the accuracy was already high, indicating that when 2.1≤R<2.25, the possibility of sag problems during mortar construction is small; when 2.25≤R<2.4, the possibility of sag problems during mortar construction is greater; therefore, the present application provides a test method for detecting the anti-sag performance of gypsum mortar, which can accurately determine whether the material has poor anti-sag properties before construction through the distribution of the ratio of diffusion and consistency after the material is stirred.

[0068] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A test method for detecting the anti-sagging performance of gypsum mortar, characterized in that: The following steps are involved: (1) Diffusion test: Take mortar powder, determine the amount of water required when the diffusion is in the range of 165-170 mm, obtain mortar slurry, test the diffusion of the mortar slurry, and record the diffusion d; (2) Consistency test: The consistency value of the mortar slurry with a diffusion degree of d is tested, which is c; (3) Calculate the anti-sagging value: anti-sagging value R = d / c; (4) Analysis of mortar anti-sagging performance: When R < 2.1, there will be no sagging problem during mortar construction; When 2.1≤R<2.25, the smaller the value, the less likely it is that the mortar will have sagging problems during construction, and the better the anti-sagging performance; When 2.25≤R<2.4, the larger the value, the greater the possibility of sag problem in mortar construction, and the worse the anti-sag performance; When 2.4≤R, sagging problems will occur during mortar construction.

2. A test method for detecting the anti-sagging performance of gypsum mortar according to claim 1, characterized in that: In the step (1), the diffusion degree is tested according to the method in GB / T 28627-2023 Plastering Gypsum.

3. A test method for detecting the anti-sagging performance of gypsum mortar according to claim 2, characterized in that: In the step (1), the water consumption of the mortar powder is determined when the diffusion degree is 165 to 170 mm according to the test method of the standard diffusion water consumption in GB / T 28627-2023 Plastering Gypsum.

4. A test method for detecting the anti-sagging performance of gypsum mortar according to claim 1, characterized in that: In the step (2), the consistency value is tested according to "JGJ 70-2009 Test Method for Basic Properties of Building Mortar".

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