Special sound-insulation waterproof caulking mortar for aluminum alloy doors and windows and preparation method thereof

Abstract

The invention discloses a special sound-proof and waterproof seam filling mortar for aluminum alloy doors and windows and a preparation method thereof, and relates to the field of building materials, the special sound-proof and waterproof seam filling mortar for aluminum alloy doors and windows comprises the following components: 80-120 parts of cement, 50-80 parts of quartz sand, 10-20 parts of a mineral admixture, 5-7 parts of a water reducing agent, 10-18 parts of an expanding agent, 10-18 parts of a binder, 15-25 parts of a waterproof agent, and 8-12 parts of a plastic retaining agent. According to the present invention, 5-10 parts of the air entraining agent, 18-24 parts of the dispersant, 30-60 parts of the powder filler, 50-70 parts of the aggregate, 16-22 parts of the silane coupling agent, and 12-20 parts of the polypropylene fiber, the carboxylic acid groups in the polyether carboxylate and the polycarboxylic acid can generate the complexation with the calcium ions and other substances in the cement to form the spatial network structure, and the silane coupling agent contains the hydrolyzable silane group so as to provide the water-retaining property; silane groups are subjected to condensation reaction with carboxylic acid groups in polyether carboxylate and polycarboxylate to form ester bonds, so that a chemically bonded network structure is constructed, the crack resistance and durability of the mortar are improved, the service life of the mortar is prolonged, and the frequency and cost of maintenance and repair are reduced.

Description

Technical Field

[0001] The present invention relates to the field of building materials, and specifically to a sound insulation and waterproof caulking mortar for aluminum alloy doors and windows and a preparation method thereof. Background Technique

[0002] Caulking mortar is a material specifically used to fill the gaps in buildings, which is used to fill the tiny gaps and holes in building structures. It can effectively prevent water penetration, enhance the structural sealing performance, and provide a certain degree of structural reinforcement. It is mainly used for filling the gaps between door and window frames and walls to achieve the functions of sealing, sound insulation, and waterproofing.

[0003] Caulking mortar for doors and windows is usually prepared from components such as cement, quartz sand, fine aggregate, waterproof agent, expansion agent, binder, etc. Among them, the waterproof agent can make it difficult for water to penetrate through the mortar layer, and the expansion agent can generate volume expansion during the hardening process of the mortar, filling the tiny pores and cracks in the mortar, improving the density and impermeability of the mortar, and playing a waterproof role. At the same time, the binder can improve the bonding force between the mortar and the door and window frames and walls. When the caulking mortar is filled in the gaps between the door and window frames and walls, it can form an effective sound insulation barrier. When the density of the cement mortar is relatively high, sound waves will be blocked when passing through, reducing the transmission of sound and improving the sound insulation effect.

[0004] Caulking mortar is used to fill the gaps between door and window frames and walls to achieve the functions of sealing, sound insulation, and waterproofing. However, caulking mortar is affected by temperature changes. When the temperature drops, it will cause the mortar to shrink. In addition, the evaporation of free water in the mortar will cause the caulking mortar to dry shrink, and this dry shrinkage is irreversible. Once it occurs, it will have a long-term impact on the performance of the caulking mortar. If the caulking mortar shrinks too much, exceeding the range that the bonding force between it and the door and window frames or walls can bear, cracks or peeling may occur, resulting in the failure of the sealing performance between the door and window frames and walls, affecting its performance in aspects such as sound insulation and waterproofing, and it needs to be maintained and repaired, increasing the maintenance cost.

[0005] Therefore, we propose a sound insulation and waterproof caulking mortar for aluminum alloy doors and windows and a preparation method thereof. Summary of the Invention

[0006] Aiming at the deficiencies of the prior art, the present invention provides a sound insulation and waterproof caulking mortar for aluminum alloy doors and windows and a preparation method thereof, which can effectively solve the problems in the background technique.

[0007] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0008] A special sound-insulating and waterproof caulking mortar for aluminum alloy doors and windows, by weight, comprises the following components: 80-120 parts of cement, 50-80 parts of quartz sand, 10-20 parts of mineral admixture, 5-7 parts of water reducer, 10-18 parts of expansive agent, 10-18 parts of binder, 15-25 parts of waterproof agent, 8-12 parts of plasticizer, 5-10 parts of air-entraining agent, 30-60 parts of powder filler, 50-70 parts of aggregate, 16-22 parts of silane coupling agent, 12-20 parts of polypropylene fiber, 18-24 parts of dispersant, and the dispersant is prepared from polyether carboxylate and polycarboxylate in a weight ratio of 1:2.5.

[0009] Preferably, the mineral admixture is one or more mixtures of slag powder, fly ash, silica fume.

[0010] Preferably, the water reducer is selected from one or more of lignosulfonate, β-methylnaphthalenesulfonate condensate, melamine formaldehyde condensate.

[0011] Preferably, the expansive agent is one of calcium oxide and magnesium oxide.

[0012] Preferably, the binder is redispersible latex powder.

[0013] Preferably, the waterproof agent is a powdered waterproof agent based on bentonite, gypsum, and alunite, and has the function of waterproofing and anti-seepage.

[0014] Preferably, the plasticizer is one or more of bentonite, diatomite, methyl cellulose, methyl hydroxyethyl cellulose ether, methyl hydroxypropyl cellulose ether, hydroxyethyl cellulose ether, carboxymethyl cellulose, and wood cellulose.

[0015] The present invention also provides a preparation method of the special sound-insulating and waterproof caulking mortar for aluminum alloy doors and windows, comprising the following steps:

[0016] S1: Weigh a certain amount of raw materials according to the proportion. First, dry-mix cement, quartz sand, mineral admixture, powder filler, and aggregate evenly to obtain dry powder.

[0017] S2: Put the binder, waterproof agent, plasticizer, expansive agent, water reducer, dispersant, and silane coupling agent into the mortar mixer in sequence, stir, and evenly add the air-entraining agent during the stirring process.

[0018] S3: Add the dry powder obtained in S1 into the mortar mixer, appropriately add a small amount of water according to the construction requirements to adjust the consistency of the caulking mortar, and stir. Evenly sprinkle polypropylene fiber during the stirring process to make the fiber distribution uniform.

[0019] S4: Stir until the caulking mortar is uniform, delicate, without caking and segregation phenomena, then the preparation is completed.

[0020] Preferably, during the stirring in S2, stir for 2 - 3 min at a stirring speed of 40 - 50 rpm.

[0021] Preferably, in S3, first perform rapid stirring for 4 - 5 min at a stirring speed of 100 - 120 rpm, and then perform slow stirring for 1 - 2 min at a stirring speed of 30 - 40 rpm.

[0022] Beneficial effects

[0023] Compared with the prior art, the present invention provides a special sound - insulating and waterproof caulking mortar for aluminum alloy doors and windows and its preparation method, having the following beneficial effects:

[0024] 1. By adding polypropylene fibers, when the temperature decreases leading to the shrinkage of the mortar, or when the free water in the mortar evaporates leading to the dry shrinkage of the mortar, the polypropylene fibers show a three - dimensional random distribution in the mortar. When the mortar is subjected to external stress, the fibers can effectively cross the cracks and play a bridging role. This bridging role can transfer stress and prevent the expansion of cracks, thereby improving the crack resistance and toughness of the mortar. Moreover, the polypropylene fibers enable good adhesion between the mortars, effectively increasing the ability of the mortar to resist tensile stress. The polypropylene fibers contribute to improving the crack resistance, durability, and service life of the mortar, reducing the frequency and cost of maintenance and repair.

[0025] 2. The dispersant is prepared by mixing polyether carboxylate and polycarboxylate in a certain weight ratio. The carboxyl groups (-COOH) in polyether carboxylate and polycarboxylic acid can form chemical bonding through complexation with alkaline substances such as calcium ions (Ca 2 +) in the cement, forming a spatial network structure, improving the bonding strength and cohesion of the mortar, and further enhancing the toughness of the mortar, making it more capable of resisting external stress.

[0026] 3. Silane coupling agents are a class of organosilicon compounds with special structures. Silane coupling agents usually have hydrolyzable silyl groups (Si - X, where X is a halogen, alkoxy, etc.). During the preparation of the mortar, these silyl groups will undergo hydrolysis reactions with water to generate silanol (Si - OH) groups. The silanol groups generated after the hydrolysis of the silane coupling agent undergo condensation reactions with the carboxyl groups (-COOH) contained in polyether carboxylate and polycarboxylate to form ester bonds (-COO - Si-). This reaction is similar to the formation of alkyd resins, which can tightly connect polyether carboxylate, polycarboxylate, and silane coupling agent together. Through the introduction of the silane coupling agent, the combination between polyether carboxylate, polycarboxylate, and the mortar is more compact, capable of reducing problems such as cracking and peeling during the use of the mortar, thereby improving the durability of the mortar. Specific embodiments

[0027] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention is further described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0028] Aiming at the deficiencies of the prior art, the present invention provides a special sound insulation and waterproof caulking mortar for aluminum alloy doors and windows, which includes the following components by weight:

[0029] 80 - 120 parts of cement, 50 - 80 parts of quartz sand, 10 - 20 parts of mineral admixture, 5 - 7 parts of water reducer, 10 - 18 parts of expansive agent, 10 - 18 parts of binder, 15 - 25 parts of waterproof agent, 8 - 12 parts of plasticizer, 5 - 10 parts of air-entraining agent, 30 - 60 parts of powder filler, 50 - 70 parts of aggregate, 16 - 22 parts of silane coupling agent, 12 - 20 parts of polypropylene fiber, 18 - 24 parts of dispersant, and the dispersant is prepared from polyether carboxylate and polycarboxylate in a weight ratio of 1:2.5.

[0030] It should be noted that in actual engineering applications, the specific proportion of the mortar needs to be determined according to the specific requirements of the project, construction conditions, raw material properties, and relevant national or regional standards;

[0031] The mineral admixture is one or more mixtures of slag powder, fly ash, and silica fume;

[0032] The water reducer is selected from one or more of lignosulfonates, β-methylnaphthalenesulfonate condensates, and melamine formaldehyde condensates;

[0033] The expansive agent is one of calcium oxide and magnesium oxide;

[0034] The binder is redispersible latex powder;

[0035] The waterproof agent is a powdered waterproof agent based on bentonite, gypsum, and alunite, and has the function of waterproofing and anti-seepage;

[0036] The plasticizer is one or more of bentonite, diatomaceous earth, methyl cellulose, methyl hydroxyethyl cellulose ether, methyl hydroxypropyl cellulose ether, hydroxyethyl cellulose ether, carboxymethyl cellulose, and wood cellulose;

[0037] The present invention also provides a preparation method of the special sound insulation and waterproof caulking mortar for aluminum alloy doors and windows, which includes the following steps:

[0038] S1: Weigh a certain amount of raw materials according to the proportion. First, dry-mix cement, quartz sand, mineral admixture, powder filler, and aggregate evenly to obtain dry powder;

[0039] S2: Put the binder, waterproofing agent, plasticizer, expansion agent, water reducer, dispersant, and silane coupling agent into the mortar mixer in sequence, stir for 2 - 3 min at a stirring speed of 40 - 50 rpm, and uniformly add the air-entraining agent during the stirring process;

[0040] S3: Add the dry powder obtained in S1 into the mortar mixer, appropriately add a small amount of water according to the construction requirements to adjust the consistency of the joint-filling mortar, first perform rapid stirring for 4 - 5 min at a stirring speed of 100 - 120 rpm, then perform slow stirring for 1 - 2 min at a stirring speed of 30 - 40 rpm, and uniformly sprinkle polypropylene fibers during the stirring process to make the fiber distribution uniform;

[0041] S4: Stir until the joint-filling mortar is uniform, delicate, without caking and segregation phenomena, then the preparation is completed.

[0042] It is worth mentioning that when the mortar is subjected to external stress, the polypropylene fibers can effectively span the cracks, play a bridging role, transfer stress and prevent the expansion of cracks. The polypropylene fibers play an important role in crack resistance, toughness improvement, matrix property improvement, impact resistance and crack resistance in the mortar, thus effectively improving the overall performance and service life of the mortar;

[0043] Moreover, the dispersant is prepared by mixing polyether carboxylate and polycarboxylate in a certain weight ratio. The carboxyl groups (-COOH) in polyether carboxylate and polycarboxylic acid can form chemical bonding through complexation with alkaline substances such as calcium ions (Ca 2 +) in the cement, forming a spatial network structure. The reaction of the dispersant can be represented by the following reaction formula:

[0044]

[0045] This reaction can improve the bonding force and cohesion of the mortar, and further enhance the toughness of the mortar, making it more capable of resisting external stress;

[0046] In addition, the silane coupling agent contains hydrolyzable silyl groups (Si-X). These groups undergo hydrolysis reactions with water during the mortar preparation process to generate silanol (Si-OH) groups. The silanol groups are highly active and can undergo condensation reactions with the carboxyl groups (-COOH) in polyether carboxylate and polycarboxylate to form ester bonds (-COO-Si-), thereby constructing a chemically bonded network structure. The reaction of the silane coupling agent can be represented by the following reaction formula:

[0047]

[0048] This network structure tightly connects polyether carboxylate, polycarboxylate and silane coupling agent together to form an integral and stable system. This chemical bonding not only enhances the cohesion of the mortar, but also significantly improves the bonding strength and crack resistance of the mortar.

[0049] Example 1

[0050] A special sound insulation and waterproof caulking mortar for aluminum alloy doors and windows, characterized in that, by weight, it comprises the following components: 100 parts of cement, 65 parts of quartz sand, 15 parts of mineral admixture, 6 parts of water reducer, 14 parts of expansive agent, 14 parts of binder, 20 parts of waterproof agent, 10 parts of plasticizer, 7.5 parts of air-entraining agent, 45 parts of powder filler, 60 parts of aggregate, 19 parts of silane coupling agent, 16 parts of polypropylene fiber, 21 parts of dispersant, and the dispersant is prepared from polyether carboxylate and polycarboxylate in a weight ratio of 1:2.5;

[0051] The cement is one or more mixtures of portland cement and sulfoaluminate cement.

[0052] The quartz sand is one of graded artificial sand and natural sand;

[0053] The mineral admixture is one or more mixtures of slag powder, fly ash and silica fume;

[0054] The water reducer is selected from one or more of lignosulfonate, β-methylnaphthalenesulfonate condensate and melamine formaldehyde condensate;

[0055] The expansive agent is one of calcium oxide and magnesium oxide;

[0056] The binder is redispersible latex powder;

[0057] The waterproof agent is a powdered waterproof agent based on bentonite, gypsum and alunite, and has the function of waterproofing and anti-seepage;

[0058] The plasticizer is one or more of bentonite, diatomite, methyl cellulose, methyl hydroxyethyl cellulose ether, methyl hydroxypropyl cellulose ether, hydroxyethyl cellulose ether, carboxymethyl cellulose and wood cellulose.

[0059] A preparation method of a special sound insulation and waterproof caulking mortar for aluminum alloy doors and windows, which is used to prepare the above-mentioned special sound insulation and waterproof caulking mortar for aluminum alloy doors and windows. The preparation method of the special sound insulation and waterproof caulking mortar for aluminum alloy doors and windows includes the following steps:

[0060] S1: Weigh a certain amount of raw materials in proportion. First, dry-mix cement, quartz sand, mineral admixture, powder filler and aggregate evenly to obtain dry powder;

[0061] S2: Put the binder, waterproofing agent, plasticizer, expansive agent, water reducer, dispersant, and silane coupling agent into the mortar mixer in sequence and stir for 2 - 3 min at a stirring speed of 40 - 50 rpm, and uniformly add the air-entraining agent during the stirring process;

[0062] S3: Add the dry powder obtained in S1 into the mortar mixer, appropriately add a small amount of water according to the construction requirements to adjust the consistency of the joint-filling mortar, first stir rapidly for 4 - 5 min at a stirring speed of 100 - 120 rpm, then stir slowly for 1 - 2 min at a stirring speed of 30 - 40 rpm, and uniformly sprinkle polypropylene fibers during the stirring process to make the fibers evenly distributed;

[0063] S4: Stir until the joint-filling mortar is uniform, delicate, without caking and segregation phenomena, then the preparation is completed.

[0064] Example Two

[0065] Follow the same preparation method as in Example One, the differences from Example One are as follows:

[0066] A sound-insulating and waterproof joint-filling mortar for aluminum alloy doors and windows, characterized in that, by weight, it comprises the following components: 80 parts of cement, 50 parts of quartz sand, 10 parts of mineral admixture, 5 parts of water reducer, 10 parts of expansive agent, 10 parts of binder, 15 parts of waterproofing agent, 8 parts of plasticizer, 5 parts of air-entraining agent, 30 parts of powder filler, 50 parts of aggregate, 16 parts of silane coupling agent, 12 parts of polypropylene fiber, 18 parts of dispersant, and the dispersant is prepared from polyether carboxylate and polycarboxylate in a weight ratio of 1:2.5;

[0067] Example Three

[0068] Follow the same preparation method as in Example One, the differences from Example One are as follows:

[0069] A sound-insulating and waterproof joint-filling mortar for aluminum alloy doors and windows, characterized in that, by weight, it comprises the following components: 120 parts of cement, 80 parts of quartz sand, 20 parts of mineral admixture, 7 parts of water reducer, 18 parts of expansive agent, 18 parts of binder, 25 parts of waterproofing agent, 12 parts of plasticizer, 10 parts of air-entraining agent, 60 parts of powder filler, 70 parts of aggregate, 22 parts of silane coupling agent, 20 parts of polypropylene fiber, 24 parts of dispersant, and the dispersant is prepared from polyether carboxylate and polycarboxylate in a weight ratio of 1:2.5;

[0070] Comparative Example One

[0071] The differences from the components in Example One are as follows:

[0072] A sound-insulating and waterproof caulking mortar for aluminum alloy doors and windows, characterized in that, by weight, it comprises the following components: 100 parts of cement, 65 parts of quartz sand, 15 parts of mineral admixture, 6 parts of water reducer, 14 parts of expansion agent, 14 parts of binder, 20 parts of waterproof agent, 10 parts of plasticizer, 7.5 parts of air-entraining agent, 45 parts of powder filler, 60 parts of aggregate, 16 parts of polypropylene fiber, 21 parts of dispersant, and the dispersant is prepared from polyether carboxylate and polycarboxylate in a weight ratio of 1:2.5;

[0073] In the preparation of the sound-insulating and waterproof caulking mortar for aluminum alloy doors and windows in this comparative example, the difference from the preparation method of Example 1 lies in:

[0074] S2: Put the binder, waterproof agent, plasticizer, expansion agent, water reducer, and dispersant into the mortar mixer in sequence, stir for 2 - 3 min at a stirring speed of 40 - 50 rpm, and uniformly add the air-entraining agent during the stirring process.

[0075] Comparative Example Two

[0076] The difference from the components of Example 1 is:

[0077] A sound-insulating and waterproof caulking mortar for aluminum alloy doors and windows, characterized in that, by weight, it comprises the following components: 100 parts of cement, 65 parts of quartz sand, 15 parts of mineral admixture, 6 parts of water reducer, 14 parts of expansion agent, 14 parts of binder, 20 parts of waterproof agent, 10 parts of plasticizer, 7.5 parts of air-entraining agent, 45 parts of powder filler, 60 parts of aggregate, 19 parts of silane coupling agent, 21 parts of dispersant, and the dispersant is prepared from polyether carboxylate and polycarboxylate in a weight ratio of 1:2.5;

[0078] In the preparation of the sound-insulating and waterproof caulking mortar for aluminum alloy doors and windows in this comparative example, the difference from the preparation method of Example 1 lies in:

[0079] S3: Add the dry powder obtained in S1 into the mortar mixer, appropriately add a small amount of water according to the construction requirements to adjust the consistency of the caulking mortar, first stir rapidly for 4 - 5 min at a stirring speed of 100 - 120 rpm, and then stir slowly for 1 - 2 min at a stirring speed of 30 - 40 rpm.

[0080] Comparative Example Three

[0081] The difference from the components of Example 1 is:

[0082] A sound insulation and waterproof caulking mortar special for aluminum alloy doors and windows, characterized in that, by weight, it comprises the following components: 100 parts of cement, 65 parts of quartz sand, 15 parts of mineral admixture, 6 parts of water reducing agent, 14 parts of expansion agent, 14 parts of binder, 20 parts of waterproof agent, 10 parts of plasticizer, 7.5 parts of air entraining agent, 45 parts of powder filler, 60 parts of aggregate, 19 parts of silane coupling agent, 16 parts of polypropylene fiber;

[0083] In this comparative example, when preparing the sound insulation and waterproof caulking mortar special for aluminum alloy doors and windows, the difference from the preparation method of Example 1 lies in:

[0084] S2: Put the binder, waterproof agent, plasticizer, expansion agent, water reducing agent, and silane coupling agent into the mortar mixer in sequence, stir for 2 - 3 min at a stirring speed of 40 - 50 rpm, and uniformly add the air entraining agent during the stirring process.

[0085] Comparative Example 4

[0086] The difference from the components of Example 1 is:

[0087] A sound insulation and waterproof caulking mortar special for aluminum alloy doors and windows, characterized in that, by weight, it comprises the following components: 100 parts of cement, 65 parts of quartz sand, 15 parts of mineral admixture, 6 parts of water reducing agent, 14 parts of expansion agent, 14 parts of binder, 20 parts of waterproof agent, 10 parts of plasticizer, 7.5 parts of air entraining agent, 45 parts of powder filler, 60 parts of aggregate, 21 parts of dispersant, and the dispersant is prepared from polyether carboxylic ester and polycarboxylic ester in a weight ratio of 1:2.5;

[0088] In this comparative example, when preparing the sound insulation and waterproof caulking mortar special for aluminum alloy doors and windows, the difference from the preparation method of Example 1 lies in:

[0089] S2: Put the binder, waterproof agent, plasticizer, expansion agent, water reducing agent, and dispersant into the mortar mixer in sequence, stir for 2 - 3 min at a stirring speed of 40 - 50 rpm, and uniformly add the air entraining agent during the stirring process;

[0090] S3: Add the dry powder obtained in S1 into the mortar mixer, appropriately add a small amount of water according to the construction requirements to adjust the consistency of the caulking mortar, first stir quickly for 4 - 5 min at a stirring speed of 100 - 120 rpm, and then stir slowly for 1 - 2 min at a stirring speed of 30 - 40 rpm.

[0091] Comparative Example 5

[0092] The difference from the components of Example 1 is:

[0093] A special sound-insulating and waterproof mortar for aluminum alloy doors and windows, characterized in that, by weight, it comprises the following components: 100 parts of cement, 65 parts of quartz sand, 15 parts of mineral admixture, 6 parts of water reducer, 14 parts of expansion agent, 14 parts of binder, 20 parts of waterproof agent, 10 parts of plasticizer, 7.5 parts of air-entraining agent, 45 parts of powder filler, 60 parts of aggregate, and 16 parts of polypropylene fiber;

[0094] In this comparative example, when preparing the special sound-insulating and waterproof mortar for aluminum alloy doors and windows, the difference from the preparation method of Example 1 lies in:

[0095] S2: Put the binder, waterproof agent, plasticizer, expansion agent, and water reducer into the mortar mixer in sequence, stir for 2 - 3 minutes, with a stirring speed of 40 - 50 rpm, and uniformly add the air-entraining agent during the stirring process.

[0096] Comparative Example 6

[0097] The difference from the components of Example 1 is: A special sound-insulating and waterproof mortar for aluminum alloy doors and windows, characterized in that, by weight, it comprises the following components: 100 parts of cement, 65 parts of quartz sand, 15 parts of mineral admixture, 6 parts of water reducer, 14 parts of expansion agent, 14 parts of binder, 20 parts of waterproof agent, 10 parts of plasticizer, 7.5 parts of air-entraining agent, 45 parts of powder filler, 60 parts of aggregate, and 19 parts of silane coupling agent;

[0098] In this comparative example, when preparing the special sound-insulating and waterproof mortar for aluminum alloy doors and windows, the difference from the preparation method of Example 1 lies in:

[0099] S2: Put the binder, waterproof agent, plasticizer, expansion agent, water reducer, and silane coupling agent into the mortar mixer in sequence, stir for 2 - 3 minutes, with a stirring speed of 40 - 50 rpm, and uniformly add the air-entraining agent during the stirring process;

[0100] S3: Add the dry powder obtained in S1 into the mortar mixer, appropriately add a small amount of water according to the construction requirements to adjust the consistency of the mortar for caulking, first stir quickly for 4 - 5 minutes, with a stirring speed of 100 - 120 rpm, and then stir slowly for 1 - 2 minutes, with a stirring speed of 30 - 40 rpm.

[0101] Comparative Example 7

[0102] The difference from the components of Example 1 is:

[0103] A special sound-insulating and waterproof caulking mortar for aluminum alloy doors and windows, characterized in that, by weight, it comprises the following components: 100 parts of cement, 65 parts of quartz sand, 15 parts of mineral admixture, 6 parts of water reducer, 14 parts of expansion agent, 14 parts of binder, 20 parts of waterproof agent, 10 parts of plasticizer, 7.5 parts of air-entraining agent, 45 parts of powder filler, and 60 parts of aggregate;

[0104] In this comparative example, when preparing the special sound-insulating and waterproof caulking mortar for aluminum alloy doors and windows, the difference from the preparation method of Example 1 lies in:

[0105] S2: Put the binder, waterproof agent, plasticizer, expansion agent, and water reducer into the mortar mixer in sequence, stir for 2 - 3 min at a stirring speed of 40 - 50 rpm, and uniformly add the air-entraining agent during the stirring process;

[0106] S3: Add the dry powder obtained in S1 into the mortar mixer, appropriately add a small amount of water according to the construction requirements to adjust the consistency of the caulking mortar, first stir rapidly for 4 - 5 min at a stirring speed of 100 - 120 rpm, and then stir slowly for 1 - 2 min at a stirring speed of 30 - 40 rpm.

[0107] Experimental group:

[0108] In order to illustrate the performance of the special sound-insulating and waterproof caulking mortar for aluminum alloy doors and windows prepared by the method of the present invention, use the CGK-2 initial drying shrinkage resistance tester of Inner Mongolia Huake Jiacheng Technology Co., Ltd. to conduct tests according to the JG / T157-2004 standard. Select the corresponding mortars of the above corresponding examples and comparative examples of the present invention for testing. Through the upward force generated by the anti-cracking tester, gradually generate fine cracks in the specified area of the specimen, and observe the cracking situation to characterize the ability of the mortar to resist crack propagation. The results are as follows in the table:

[0109]

[0110] Analyzing the data in the table, it can be seen that compared with Example 1 and Example 2, the crack width and 28-day shrinkage rate of the mortar prepared in Example 3 are smaller, and the flexural strength and compressive strength are higher. The mortar prepared in Example 3 has the best anti-cracking performance. The anti-cracking performance of the mortar prepared in Example 3 has been improved, and the volume stability of the mortar has been improved.

[0111] In addition, comparing the anti-cracking performance of the mortars prepared in Example 1, Example 2, and Example 3 with the anti-cracking performance of the mortars prepared in Comparative Example 1, Comparative Example 2, and Comparative Example 3, it can be seen from the table that the crack width and 28-day shrinkage rate of the mortars prepared in Example 1, Example 2, and Example 3 are smaller, and the flexural strength and compressive strength are higher. Considering that silane coupling agent, polypropylene fiber, and dispersant can all improve the anti-cracking performance of the mortar.

[0112] Compared with Comparative Example 4, the mortar prepared in Example 2 was added with a silane coupling agent. Compared with Comparative Example 6, the mortar prepared in Example 2 was added with a dispersant. Analyzing the data in the table, the crack resistance of the mortar prepared in Example 2 was better than that of the mortar prepared in Comparative Example 4 and Comparative Example 6. Considering that the combined use of the silane coupling agent and the dispersant had a better effect, when the silane coupling agent and the dispersant were used together, they could better improve the crack resistance of the mortar than when used alone.

[0113] As can be seen from the above, polyether carboxylic ester and polycarboxylic acid can produce a complexing effect in the mortar, forming a spatial network structure, improving the bonding force and cohesion of the mortar. And during the preparation process of the mortar, after the addition of the silane coupling agent, the silane groups therein undergo a hydrolysis reaction with water and then a condensation reaction with polyether carboxylic ester and polycarboxylate, tightly connecting polyether carboxylic ester, polycarboxylate and the silane coupling agent together, which can reduce problems such as cracking during the use of the mortar, and thus enhance the toughness and crack resistance of the mortar.

[0114] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. A sound insulation and waterproof caulking mortar special for aluminum alloy doors and windows, characterized in that, By weight, it includes the following components: 80 - 120 parts of cement, 50 - 80 parts of quartz sand, 10 - 20 parts of mineral admixture, 5 - 7 parts of water reducer, 10 - 18 parts of expansive agent, 10 - 18 parts of binder, 15 - 25 parts of waterproof agent, 8 - 12 parts of plasticizer, 5 - 10 parts of air-entraining agent, 30 - 60 parts of powder filler, 50 - 70 parts of aggregate, 16 - 22 parts of silane coupling agent, 12 - 20 parts of polypropylene fiber, 18 - 24 parts of dispersant, and the dispersant is prepared from polyether carboxylate and polycarboxylate in a weight ratio of 1:2.

5.

2. The sound insulation and waterproof caulking mortar for special use in aluminum alloy doors and windows according to claim 1, wherein: The mineral admixture is one or a mixture of more than one of slag powder, fly ash, and silica fume.

3. The sound insulation and waterproof caulking mortar for special use in aluminum alloy doors and windows according to claim 2, wherein: The water reducer is selected from one or more of lignosulfonate, β-methylnaphthalenesulfonate condensate, and melamine formaldehyde condensate.

4. The sound insulation and waterproof caulking mortar for special use in aluminum alloy doors and windows according to claim 3, wherein: The expansive agent is one of calcium oxide and magnesium oxide.

5. The sound insulation and waterproof caulking mortar for special use in aluminum alloy doors and windows according to claim 4, characterized in that: The binder is redispersible latex powder.

6. The special sound insulation and waterproof caulking mortar for aluminum alloy doors and windows according to claim 5, wherein: The plasticizer is one or more of bentonite, diatomite, methyl cellulose, methyl hydroxyethyl cellulose ether, methyl hydroxypropyl cellulose ether, hydroxyethyl cellulose ether, carboxymethyl cellulose, and wood cellulose.

7. A preparation method of a special sound insulation and waterproof caulking mortar for aluminum alloy doors and windows, which is used to prepare the special sound insulation and waterproof caulking mortar for aluminum alloy doors and windows described in any one of claims 1 to 6, characterized in that, The preparation method of the special sound insulation and waterproof caulking mortar for aluminum alloy doors and windows includes the following steps: S1: Weigh a certain amount of raw materials according to the proportion. First, dry-mix cement, quartz sand, mineral admixture, powder filler, and aggregate evenly to obtain dry powder. S2: Put the binder, waterproof agent, plasticizer, expansive agent, water reducer, dispersant, and silane coupling agent into the mortar mixer in sequence, stir, and evenly add the air-entraining agent during the stirring process. S3: Add the dry powder obtained in S1 into the mortar mixer, appropriately add a small amount of water according to the construction requirements to adjust the consistency of the caulking mortar, and stir. Evenly sprinkle polypropylene fiber during the stirring process to make the fiber evenly distributed. S4: Stir until the caulking mortar is uniform, delicate, without caking and segregation phenomena, then the preparation is completed.

8. The preparation method of the special sound insulation and waterproof caulking mortar for aluminum alloy doors and windows according to claim 7, characterized in that: During the stirring in S2, stir for 2 - 3 minutes, and the stirring speed is 40 - 50 rpm.

9. The preparation method of the special sound insulation and waterproof caulking mortar for aluminum alloy doors and windows according to claim 7, characterized in that: In S3, first conduct rapid stirring for 4 - 5 minutes, with a stirring speed of 100 - 120 rpm, and then conduct slow stirring for 1 - 2 minutes, with a stirring speed of 30 - 40 rpm.

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