A mortar composition for pasting construction of facing brick walls

Abstract

The invention discloses a mortar composition for pasting construction of facing brick wall, which comprises the following components in parts by weight: 300-750 of main supporting material, 30-250 of auxiliary supporting material, 200-450 of cement, 10-50 of active additive, 3-30 of glue powder, 1-5 of curing agent, 0.1-0.5 of retarder, 2-10 of dispersant and 5-10 of acrylic emulsion; the glue powder is at least one of dispersible latex powder and resin glue powder; the curing agent is at least one of silicon phosphate and dipolysilicon phosphate; the retarder is at least one of diethylene glycol and citric acid; the dispersant is at least one of sodium tripolyphosphate and polycarboxylate. The invention has the beneficial effects that the combination of glue powder, acrylic emulsion and cement can significantly improve the tensile bonding strength of mortar. The retarder can increase the plastic preservation time of the composition. The active additive and the filling material can significantly improve the crack resistance and frost resistance of the mortar.

Description

Technical Field

[0001] The invention belongs to the technical field of building construction materials, and particularly relates to a mortar composition used for facing brick wall pasting construction. Background Art

[0002] In construction projects, facing bricks are a common decorative material widely used on interior and exterior walls. However, when pasting facing bricks on walls, there are still many problems with existing pasting technology and materials, which affect the construction quality and frost resistance. These problems mainly include the following aspects:

[0003] Tensile bond strength problem: Many traditional mortars currently have insufficient tensile bond strength, especially under humid or freeze-thaw conditions, which can easily cause the facing tiles to fall off. This problem arises mainly because ordinary mortars are prone to chemical changes under these extreme conditions and lose their original bonding properties. In addition, the shrinkage of ordinary mortars during the drying process will also have a negative impact on the tensile bond strength, further exacerbating the risk of bricks falling off. In addition, the correctness of the bonding process directly affects the bonding effect of the facing tiles. At present, during the construction process, the facing tiles are often not firmly bonded due to improper operation of the construction workers (such as insufficient back-coating of adhesive). The presence of air gaps will also significantly reduce the tensile bond strength and increase the risk of facing tiles falling off.

[0004] Workability issues: During the construction process, the workability of mortar (such as plastic retention time and fluidity) is one of the important factors affecting construction efficiency and quality. However, existing mortar products often perform poorly in these aspects, especially when laying facing tiles over a large area, it is easy for the mortar to dry too quickly or lack fluidity. These problems not only increase the difficulty of construction, but may also lead to weak bonding and early falling of facing tiles.

[0005] Frost resistance issues: Under extreme weather conditions, such as freeze-thaw cycles and high humidity environments, the bonding performance of existing mortar and facing tiles is often not stable enough, which can easily lead to bond failure. For example, in freeze-thaw cycles, the repeated freezing and melting of water in the mortar will cause the destruction of the mortar structure, thereby affecting the tensile bond strength. In addition, in a high humidity environment, the mortar is prone to absorb water and expand, which will also have an adverse effect on the bonding performance. Summary of the invention

[0006] The object of the present invention is to provide a mortar composition for the pasting construction of facing brick walls, so as to solve one or more of the above-mentioned technical problems.

[0007] The technical solution of the present invention for solving the above technical problems is as follows: a mortar composition for wall-mounted facing brick pasting construction, comprising: 300-750 parts by weight of main supporting materials, 30-250 parts by weight of auxiliary supporting materials, 200-450 parts by weight of cement, 10-50 parts by weight of active additives, 3-30 parts by weight of glue powder, 1-5 parts by weight of curing agent, 0.1-0.5 parts by weight of retarder, 2-10 parts by weight of dispersant and 5-10 parts by weight of acrylic emulsion; the glue powder is at least one of dispersible latex powder and resin glue powder; the curing agent is at least one of silicon phosphate and dipolysilicon phosphate; the retarder is at least one of diethylene glycol and citric acid; the dispersant is at least one of sodium tripolyphosphate and polycarboxylate.

[0008] In the mortar composition for facing brick wall pasting construction as described above, preferably, the main supporting material is at least one of machine-made sand and river sand; and the auxiliary supporting material is at least one of expanded vermiculite and sepiolite particles.

[0009] The mortar composition for facing brick wall pasting construction as described above in the present invention preferably further comprises 10-50 parts by weight of an active additive; the active additive is at least one of blast furnace slag and fly ash.

[0010] The mortar composition for facing brick wall pasting construction as described above in the present invention preferably further comprises 1-3 parts by weight of cellulose ether, wherein the cellulose ether is at least one of methyl cellulose ether and ethyl cellulose ether.

[0011] The mortar composition for facing brick wall pasting construction as described above in the present invention preferably further comprises 1-10 parts by weight of a filling material, wherein the filling material is at least one of silica fume and stone powder.

[0012] The technical solution of the present invention for solving the above technical problems is as follows: a mortar composition for wall-mounted facing brick pasting construction, consisting of the following components in weight proportion: 300-750 parts by weight of main supporting material, 30-250 parts by weight of auxiliary supporting material, 200-450 parts by weight of cement, 10-50 parts by weight of active additive, 3-30 parts by weight of glue powder, 1-5 parts by weight of curing agent, 0.1-0.5 parts by weight of retarder, 2-10 parts by weight of dispersant and 5-10 parts by weight of acrylic emulsion; the glue powder is at least one of dispersible latex powder and resin glue powder; the curing agent is at least one of silicon phosphate and dipolysilicon phosphate; the retarder is at least one of diethylene glycol and citric acid; the dispersant is at least one of sodium tripolyphosphate and polycarboxylate.

[0013] In the mortar composition for facing brick wall pasting construction as described above, preferably, the main supporting material is at least one of machine-made sand and river sand; and the auxiliary supporting material is at least one of expanded vermiculite and sepiolite particles.

[0014] The mortar composition for facing brick wall pasting construction as described above in the present invention preferably further comprises 10-50 parts by weight of an active additive; the active additive is at least one of blast furnace slag and fly ash.

[0015] The mortar composition for facing brick wall pasting construction as described above in the present invention preferably further comprises 1-3 parts by weight of cellulose ether, wherein the cellulose ether is at least one of methyl cellulose ether and ethyl cellulose ether.

[0016] The mortar composition for facing brick wall pasting construction as described above in the present invention preferably further comprises 1-10 parts by weight of a filling material, wherein the filling material is at least one of silica fume and stone powder.

[0017] The beneficial effects of the present invention are as follows: the combination of rubber powder (such as dispersible latex powder), acrylic emulsion and cement can significantly improve the tensile bonding strength of mortar. The retarder (such as diethylene glycol, citric acid) can increase the plastic preservation time of the composition. The active additive (such as blast furnace slag, fly ash) and filler (such as silica fume, stone powder) can significantly improve the crack resistance and frost resistance of the mortar. DETAILED DESCRIPTION

[0018] The embodiments described herein are specific embodiments of the present invention, which are used to illustrate the concept of the present invention, are illustrative and exemplary, and should not be construed as limiting the embodiments of the present invention and the scope of the present invention. In addition to the embodiments described herein, those skilled in the art can also adopt other obvious technical solutions based on the claims and the contents disclosed in the specification of this application, including technical solutions that adopt any obvious replacement and modification of the embodiments described herein.

[0019] In the following embodiments of the present invention, the raw materials of the mortar composition used are from the following sources, including materials that are easily available in building material markets, such as machine-made sand, river sand, blast furnace slag, silica fume, and stone powder.

[0020] Acrylic emulsion, manufacturer: Guangzhou Ruixing Chemical Technology Co., Ltd., model: HD-825.

[0021] Dispersible latex powder, manufacturer: Wacker Chemical (China) Co., Ltd., model: 5010N.

[0022] Resin powder, manufacturer: Dalian Chemical Industry Co., Ltd., model: DAP11.

[0023] Silicon phosphate, manufacturer: Wuhan Haorong Biotechnology Co., Ltd.

[0024] Silicon dipolyphosphate, manufacturer: Wuhan Haorong Biotechnology Co., Ltd.

[0025] Diethylene glycol, manufacturer: Jiangsu Runfeng Synthetic Technology Co., Ltd., specification: 99.5wt% purity.

[0026] Citric acid, manufacturer: Hubei Xinbona Chemical Co., Ltd., specification: 99.5wt% food grade and industrial grade.

[0027] Sodium tripolyphosphate, manufacturer: Huangshi Jingsheng Biotechnology Co., Ltd., specification: 99wt% purity.

[0028] Polycarboxylate, manufacturer: Guangzhou Ruisida Latex Technology Co., Ltd.

[0029] Expanded vermiculite, manufacturer: Pengjian Mineral Products Processing Plant, specification: 40-200 mesh.

[0030] Sepiolite granules, manufacturer: Jiutai Refractory Materials Co., Ltd., specifications: 40-200 mesh.

[0031] Fly ash, manufacturer: Hunan Xineng Trading Co., Ltd., specification: 200 mesh.

[0032] Methyl cellulose ether, manufacturer: Shanghai Huiguang Fine Chemical Co., Ltd., model: MHG12.

[0033] Ethyl cellulose ether, manufacturer: Shandong Heda Co., Ltd., model: HD20s.

[0034] Example 1

[0035] The mortar composition used for the pasting construction of facing brick walls is composed of the following components in the following weight ratio: 300kg of machine-made sand, 250kg of expanded vermiculite, 200kg of Portland cement, 30kg of dispersible latex powder, 1kg of silicon phosphate, 0.5kg of diethylene glycol, 2kg of sodium tripolyphosphate and 10kg of acrylic emulsion.

[0036] Example 2

[0037] The mortar composition used for the pasting construction of facing brick walls is composed of the following components in the following weight ratio: 750 kg of river sand, 30 kg of sepiolite particles, 450 kg of sulphoaluminate cement, 3 kg of resin glue powder, 5 kg of silicon dipolyphosphate, 0.1 kg of citric acid, 10 kg of polycarboxylate and 5 kg of acrylic emulsion.

[0038] Example 3

[0039] The mortar composition used for the pasting construction of facing brick walls is composed of the following components in the following weight ratio: 160kg of machine-made sand, 140kg of sepiolite particles, 300kg of silicate cement, 20kg of resin glue powder, 4kg of silicon phosphate, 0.3kg of citric acid, 6kg of sodium tripolyphosphate and 8kg of acrylic emulsion.

[0040] Example 4

[0041] The mortar composition used for the pasting construction of facing brick walls is composed of the following components in the following weight ratio: 160 kg of machine-made sand, 140 kg of sepiolite particles, 20 kg of resin glue powder, 4 kg of silicon phosphate, 0.3 kg of citric acid, 6 kg of sodium tripolyphosphate and 8 kg of acrylic emulsion.

[0042] Example 5

[0043] The mortar composition used for the pasting construction of facing brick walls is composed of the following components in the following weight ratio: 160 kg of machine-made sand, 140 kg of sepiolite particles, 300 kg of silicate cement, 4 kg of silicon phosphate, 0.3 kg of citric acid, 6 kg of sodium tripolyphosphate and 8 kg of acrylic emulsion.

[0044] Example 6

[0045] The mortar composition used for the pasting construction of facing brick walls is composed of the following components in the following weight ratio: 160kg of machine-made sand, 140kg of sepiolite particles, 300kg of silicate cement, 20kg of resin glue powder, 4kg of silicon phosphate, 0.3kg of citric acid and 6kg of sodium tripolyphosphate.

[0046] Example 7

[0047] The mortar composition used for the pasting construction of facing brick walls is composed of the following components in the following weight ratio: 300kg of machine-made sand, 250kg of expanded vermiculite, 200kg of Portland cement, 30kg of dispersible latex powder, 1kg of silicon phosphate, 2kg of sodium tripolyphosphate and 10kg of acrylic emulsion.

[0048] Example 8

[0049] The mortar composition used for the pasting construction of facing brick walls is composed of the following components in the following weight ratio: 750kg of river sand, 30kg of sepiolite particles, 450kg of sulphoaluminate cement, 3kg of resin glue powder, 5kg of silicon dipolyphosphate, 10kg of polycarboxylate and 5kg of acrylic emulsion.

[0050] Example 9

[0051] The mortar composition used for the pasting construction of facing brick walls is composed of the following components in the following weight ratio: 160kg of machine-made sand, 140kg of sepiolite particles, 300kg of Portland cement, 20kg of resin glue powder, 4kg of silicon phosphate, 0.3kg of citric acid, 6kg of sodium tripolyphosphate, 8kg of acrylic emulsion and 10kg of blast furnace slag.

[0052] Example 10

[0053] The mortar composition used for the pasting construction of facing brick walls is composed of the following components in the following weight ratio: 160kg of machine-made sand, 140kg of sepiolite particles, 300kg of silicate cement, 20kg of resin glue powder, 4kg of silicon phosphate, 0.3kg of citric acid, 6kg of sodium tripolyphosphate, 8kg of acrylic emulsion and 50kg of fly ash.

[0054] Embodiment 11

[0055] The mortar composition used for the pasting construction of facing brick walls is composed of the following components in the following weight ratio: 160kg of machine-made sand, 140kg of sepiolite particles, 300kg of Portland cement, 20kg of resin glue powder, 4kg of silicon phosphate, 0.3kg of citric acid, 6kg of sodium tripolyphosphate, 8kg of acrylic emulsion and 26kg of fly ash.

[0056] Example 12

[0057] The mortar composition used for the pasting construction of facing brick walls is composed of the following components in the following weight ratio: 160kg of machine-made sand, 140kg of sepiolite particles, 300kg of silicate cement, 20kg of resin glue powder, 4kg of silicon phosphate, 0.3kg of citric acid, 6kg of sodium tripolyphosphate, 8kg of acrylic emulsion and 1kg of silica fume.

[0058] Embodiment 13

[0059] The mortar composition used for the pasting construction of facing brick walls is composed of the following components in the following weight ratio: 160kg of machine-made sand, 140kg of sepiolite particles, 300kg of Portland cement, 20kg of resin glue powder, 4kg of silicon phosphate, 0.3kg of citric acid, 6kg of sodium tripolyphosphate, 8kg of acrylic emulsion and 10kg of stone powder.

[0060] Embodiment 14

[0061] The mortar composition used for the pasting construction of facing brick walls is composed of the following components in the following weight ratio: 160kg of machine-made sand, 140kg of sepiolite particles, 300kg of Portland cement, 20kg of resin glue powder, 4kg of silicon phosphate, 0.3kg of citric acid, 6kg of sodium tripolyphosphate, 8kg of acrylic emulsion and 5kg of stone powder.

[0062] Embodiment 15

[0063] The mortar composition used for the pasting construction of facing brick walls is composed of the following components in the following weight ratio: 160kg of machine-made sand, 140kg of sepiolite particles, 300kg of Portland cement, 20kg of resin glue powder, 4kg of silicon phosphate, 0.3kg of citric acid, 6kg of sodium tripolyphosphate, 8kg of acrylic emulsion, 26kg of fly ash and 5kg of stone powder.

[0064] Example 16

[0065] The mortar composition used for the pasting construction of facing brick walls is composed of the following components in the following weight ratio: 160kg of machine-made sand, 140kg of sepiolite particles, 300kg of silicate cement, 20kg of resin glue powder, 4kg of silicon phosphate, 0.3kg of citric acid, 6kg of sodium tripolyphosphate, 8kg of acrylic emulsion, 26kg of fly ash, 5kg of stone powder and 1kg of methyl cellulose ether.

[0066] Embodiment 17

[0067] The mortar composition used for the pasting construction of facing brick walls is composed of the following components in the following weight ratio: 160kg of machine-made sand, 140kg of sepiolite particles, 300kg of Portland cement, 20kg of resin glue powder, 4kg of silicon phosphate, 0.3kg of citric acid, 6kg of sodium tripolyphosphate, 8kg of acrylic emulsion, 26kg of fly ash, 5kg of stone powder and 3kg of ethyl cellulose ether.

[0068] Embodiment 18

[0069] The mortar composition used for the pasting construction of facing brick walls is composed of the following components in the following weight ratio: 160kg of machine-made sand, 140kg of sepiolite particles, 300kg of silicate cement, 20kg of resin glue powder, 4kg of silicon phosphate, 0.3kg of citric acid, 6kg of sodium tripolyphosphate, 8kg of acrylic emulsion, 26kg of fly ash, 5kg of stone powder and 6kg of alkylbenzene sulfonate calcium salt.

[0070] Embodiment 19

[0071] The mortar composition used for the pasting construction of facing brick walls is composed of the following components in the following weight ratio: 160kg of machine-made sand, 140kg of sepiolite particles, 300kg of Portland cement, 20kg of resin glue powder, 4kg of silicon phosphate, 0.3kg of citric acid, 6kg of sodium tripolyphosphate, 8kg of acrylic emulsion, 26kg of fly ash, 5kg of stone powder and 10kg of alkylphenol polyoxyethylene pyrimidine.

[0072] When the mortar composition of the above embodiment is subjected to the performance test, the following preparation method is followed: 1. Preparation of the main supporting material: weigh a predetermined mass of the main supporting material. Place it in a stirring device for preliminary stirring to ensure that the material is evenly dispersed (add water to the stirring device to meet the mixing requirements). 2. Addition of auxiliary supporting material: weigh a predetermined mass of auxiliary supporting material. Gradually add the auxiliary supporting material to the stirring device and fully mix it with the main supporting material. 3. Addition of cement: weigh a predetermined mass of cement. During continuous stirring, gradually add cement to the stirring device to make it evenly distributed. 4. Addition of active additives: weigh a predetermined mass of active additives. Slowly add it to the stirring device to ensure that the additives are fully mixed with other materials. 5. Addition of rubber powder: weigh a predetermined mass of rubber powder (at least one of dispersible latex powder and resin rubber powder). Sprinkle the rubber powder evenly into the stirring device and continue stirring until uniform. 6. Addition of curing agent: weigh a predetermined mass of curing agent (at least one of silicon phosphate and dipolysilicon phosphate). Slowly add it to the stirring device to ensure that the curing agent is fully dispersed in the mixture. 7. Addition of retarder: Weigh a predetermined mass of retarder (at least one of diethylene glycol and citric acid). Slowly add the retarder to the mixture and continue stirring to ensure uniform distribution. 8. Addition of dispersant: Weigh a predetermined mass of dispersant (at least one of sodium tripolyphosphate and polycarboxylate). Gradually add the dispersant during stirring to ensure uniform mixing. 9. Addition of acrylic emulsion: Weigh 5-10 predetermined masses of acrylic emulsion. While continuing to stir, slowly pour the acrylic emulsion into the stirring equipment to fully blend it with the mixture. 10. Final stirring: After all materials are fully mixed, continue stirring for about 10-15 minutes to ensure that all components are evenly distributed to form a homogeneous mortar composition.

[0073] Performance test: tensile bond strength, plastic retention time and frost resistance were tested in accordance with the provisions of GB / T25181-2019. The freeze-thaw cycles for the frost resistance of Examples 9-15 were 50 times, and for the other examples, 25 times. The freeze-thaw cycles for Example 3 were performed twice, and there was no cracking, peeling or flaking after 25 cycles, and there was cracking, flaking and flaking with an area exceeding 20% ​​after 50 cycles.

[0074] Table 1 Performance test results

[0075] Example Performance Tensile bond strength Plastic preservation time Frost resistance Example 1 2.55Mpa 18.6h No cracking, peeling or flaking Example 2 2.50Mpa 18.1h No cracking, peeling or flaking Example 3 2.83Mpa 19.0h No cracking, peeling or flaking Example 4 2.22Mpa 20.3h Local cracking, no peeling, local peeling Example 5 2.18Mpa 19.9h Local cracking, no peeling, local peeling Example 6 1.97Mpa 20.7h Local cracking, no peeling, local peeling Example 7 2.42pa 16.0h No cracking, peeling or flaking Example 8 2.38Mpa 15.9h No cracking, peeling or flaking Example 9 2.20Mpa 19.1h Local cracking, no peeling, local peeling Example 10 2.53Mpa 18.3h Local cracking, no peeling, local peeling Embodiment 11 2.89Mpa 20.3h Local cracking, no peeling, local peeling Example 12 2.93Mpa 21.2h Local cracking, no peeling, local peeling Embodiment 13 2.83Mpa 19.6h Local cracking, no peeling, local peeling Embodiment 14 2.62Mpa 19.2h Local cracking, no peeling, local peeling Embodiment 15 2.78Mpa 19.0h No cracking, peeling or flaking Example 16 2.91Mpa 22.7h No cracking, peeling or flaking Embodiment 17 3.12Mpa 23.2h No cracking, peeling or flaking Embodiment 18 3.21Mpa 22.7h No cracking, peeling or flaking Embodiment 19 3.35Mpa 22.0h No cracking, peeling or flaking

[0076] The technical features disclosed above are not limited to the disclosed combinations with other features. Those skilled in the art may also make other combinations between the technical features according to the purpose of the invention to achieve the purpose of the invention.

Claims

1. A mortar composition for pasting facing brick walls, characterized in that: include: The invention comprises 300-750 parts by weight of main supporting materials, 30-250 parts by weight of auxiliary supporting materials, 200-450 parts by weight of cement, 10-50 parts by weight of active additives, 3-30 parts by weight of rubber powder, 1-5 parts by weight of curing agent, 0.1-0.5 parts by weight of retarder, 2-10 parts by weight of dispersant and 5-10 parts by weight of acrylic emulsion; the rubber powder is at least one of dispersible latex powder and resin rubber powder; the curing agent is at least one of silicon phosphate and dipolysilicon phosphate; the retarder is at least one of diethylene glycol and citric acid; the dispersant is at least one of sodium tripolyphosphate and polycarboxylate.

2. The mortar composition for facing brick wall pasting construction according to claim 1, characterized in that: The main supporting material is at least one of machine-made sand and river sand; the auxiliary supporting material is at least one of expanded vermiculite and sepiolite particles.

3. The mortar composition for facing brick wall pasting construction according to claim 1, characterized in that: It also includes 10-50 parts by weight of an active additive; the active additive is at least one of blast furnace slag and fly ash.

4. The mortar composition for facing brick wall pasting construction according to claim 1, characterized in that: The invention also comprises 1-3 parts by weight of cellulose ether, wherein the cellulose ether is at least one of methyl cellulose ether and ethyl cellulose ether.

5. The mortar composition for facing brick wall pasting construction according to claim 1, characterized in that: It also includes 1-10 parts by weight of a filling material, wherein the filling material is at least one of silica fume and stone powder.

6. A mortar composition for pasting facing brick walls, characterized in that: The invention is composed of the following components in weight proportion: 300-750 parts by weight of main supporting material, 30-250 parts by weight of auxiliary supporting material, 200-450 parts by weight of cement, 10-50 parts by weight of active additive, 3-30 parts by weight of rubber powder, 1-5 parts by weight of curing agent, 0.1-0.5 parts by weight of retarder, 2-10 parts by weight of dispersant and 5-10 parts by weight of acrylic emulsion; the rubber powder is at least one of dispersible latex powder and resin rubber powder; the curing agent is at least one of silicon phosphate and dipolysilicon phosphate; the retarder is at least one of diethylene glycol and citric acid; the dispersant is at least one of sodium tripolyphosphate and polycarboxylate.

7. The mortar composition for facing brick wall pasting construction according to claim 6, characterized in that: The main supporting material is at least one of machine-made sand and river sand; the auxiliary supporting material is at least one of expanded vermiculite and sepiolite particles.

8. The mortar composition for facing brick wall pasting construction according to claim 6, characterized in that: It also includes 10-50 parts by weight of an active additive; the active additive is at least one of blast furnace slag and fly ash.

9. The mortar composition for facing brick wall pasting construction according to claim 6, characterized in that: The invention also comprises 1-3 parts by weight of cellulose ether, wherein the cellulose ether is at least one of methyl cellulose ether and ethyl cellulose ether.

10. The mortar composition for facing brick wall pasting construction according to claim 6, characterized in that: It also includes 1-10 parts by weight of a filling material, wherein the filling material is at least one of silica fume and stone powder.