Novel mortar additive and preparation method thereof

Abstract

The invention provides a novel mortar additive and a preparation method thereof, and relates to the technical field of building materials, and the novel mortar additive is prepared from the following raw materials: polyacrylamide, silanol, silicon dioxide, sodium gluconate, a surfactant, a defoaming agent, an early strength agent, a retarder and a plastic retaining agent. The working performance of the mortar is improved, the setting time of the mortar is adjusted, the durability of the mortar is enhanced, the mortar can keep good performance under different conditions by integrating the functions of various raw materials, the construction quality and efficiency are improved, and meanwhile, through reasonable matching of the raw materials, on the premise that the performance of the mortar is guaranteed, the construction cost is reduced. The consumption and waste of raw materials are reduced, and the production cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of building materials, and in particular to a novel mortar additive and a preparation method thereof. Background Art

[0002] Mortar is a commonly used material in construction projects. It is mainly composed of a mixture of inorganic cementitious materials, fine aggregate and water. It is used for masonry structures, plastering the interior and exterior surfaces of buildings, grouting large wall panels and masonry walls, and bonding decorative materials. Mortar can be divided into masonry mortar, plastering mortar, special mortar and other types according to its use and constituent materials. Various additives are usually added to improve the performance of the mortar.

[0003] However, most of the existing mortar additives are cellulose ether, redispersible latex powder, etc. Although cellulose ether can improve the water retention of mortar, excessive use may lead to reduced mortar strength; redispersible latex powder can improve the flexibility of mortar, but the cost is high and may have an adverse effect on the water resistance of mortar; in addition, the existing mortar additives also have the problems of single performance and insignificant effect. Summary of the invention

[0004] The purpose of the present invention is to provide a novel mortar additive and a preparation method thereof, so as to solve the technical problems existing in the prior art.

[0005] In order to achieve the above-mentioned object of the invention, the technical solution adopted by the present invention is:

[0006] A new type of mortar additive and a preparation method thereof, comprising the following raw materials: polyacrylamide, silanol, silicon dioxide, sodium gluconate, surfactant, defoamer, early strength agent, retarder, and plasticizer.

[0007] Furthermore, the weight percentages of the raw materials are: polyacrylamide 0.05%-0.15%, silanol 18%-60%, silicon dioxide 6%-30%, sodium gluconate 5%-25%, surfactant 1%-14%, defoamer 0.05%-0.4%, early strength agent 0.05%-6%, retarder 0.05%-4%, and plasticizer 0.05%-4%.

[0008] Furthermore, the weight percentages of the raw materials are: polyacrylamide 0.1%-0.5%, silanol 35%-50%, silicon dioxide 12%-20%, sodium gluconate 10%-15%, surfactant 2%-4%, defoamer 0.1%-0.3%, early strength agent 1%-5%, retarder 1%-3%, and plasticizer 1%-3%.

[0009] Furthermore, the early strength agent includes: an inorganic salt early strength agent and an organic amine early strength agent, the inorganic salt early strength agent is calcium chloride or sodium sulfate; the organic amine early strength agent is triethanolamine.

[0010] Furthermore, the retarder includes: one or more of citric acid, tartaric acid, glucose, calcium lignin sulfonate, and sodium lignin sulfonate.

[0011] Furthermore, the method comprises the following steps: S1: raw material preparation, weighing the required raw materials according to the weight percentage of the formula, and preparing the required stirring equipment and storage container; S2: mixing, putting the polyacrylamide, silanol, silicon dioxide and sodium gluconate into a dry stirring container and premixing them at a preset speed; S3: stirring, adding the mixed raw materials in S2 into the stirring equipment, starting the stirring equipment to stir at a speed of 500-2500r / min, at which time the surfactant, defoamer, early strength agent, retarder, plasticizer and an appropriate amount of water are added in sequence, and stirring is performed fully after the addition is completed; S4: heating, heating the stirring equipment during the stirring process, and monitoring the performance parameters of the mixed material in real time, and adjusting and optimizing according to the real-time situation; S5: filtering, after stirring evenly, selecting appropriate filtering equipment to filter the mixed material according to the production scale and filtering accuracy; S6: packaging, collecting the filtered mortar additive filtrate into a clean container, packaging and storing it.

[0012] Furthermore, the rotation speed of the stirring device in S3 is 1500r / min.

[0013] Furthermore, the heating temperature in S4 is 80-120° C. and the heating time is 45-60 min.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] (i) The present invention enhances the water retention and cohesiveness of the mortar by adding polyacrylamide, silanol, silicon dioxide and sodium gluconate, improves the flexibility of the mortar, and helps to improve the working performance of the mortar;

[0016] (ii) The present invention prolongs the operable time of the mortar, adjusts the setting time of the mortar, and enhances the durability of the mortar by adding an early strength agent, a retarder, and a plasticizer;

[0017] (III) The preparation process of the present invention enhances the functions of various raw materials, so that the mortar can maintain good performance under different conditions, improve the construction quality and efficiency, and at the same time, through reasonable matching of raw materials, while ensuring the performance of the mortar, reduce the amount and waste of raw materials, and reduce production costs. DETAILED DESCRIPTION

[0018] In order to make the contents of the present invention more clearly understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention.

[0019] This embodiment provides a novel mortar additive and a preparation method thereof, which is made of the following raw materials: polyacrylamide, silanol, silicon dioxide, sodium gluconate, surfactant, defoamer, early strength agent, retarder, and plasticizer, and has the following specific functions:

[0020] Polyacrylamide: It has the function of increasing the water retention and cohesiveness of mortar;

[0021] Silicon alcohol: It improves the flexibility and crack resistance of mortar and enhances the bonding strength between mortar and base layer;

[0022] Silicon dioxide: It can fill the pores in the mortar, increase the density and strength of the mortar, and improve the wear resistance and chemical corrosion resistance of the mortar;

[0023] Sodium gluconate: It has the function of slowing down the setting and enhancing the later strength of the mortar;

[0024] Surfactant: It has the function of reducing the surface tension of the mortar system, improving the compatibility and dispersibility of each component, and enhancing the permeability and wettability of the mortar;

[0025] Defoamer: It can eliminate bubbles generated during the mixing process, improve the appearance quality of mortar, and reduce surface defects;

[0026] Early strength agent: It accelerates the development of early strength of mortar and shortens the curing time;

[0027] Retarder: It has the function of delaying the setting time of mortar;

[0028] Plasticizer: It has the function of maintaining the plasticity of mortar for a certain period of time and preventing the mortar from hardening and drying prematurely.

[0029] Embodiment 1:

[0030] The weight percentages of the raw materials are: polyacrylamide 0.05%-0.15%, silanol 18%-60%, silicon dioxide 6%-30%, sodium gluconate 5%-25%, surfactant 1%-14%, defoamer 0.05%-0.4%, early strength agent 0.05%-6%, retarder 0.05%-4%, plasticizer 0.05%-4%;

[0031] S1: Raw material preparation: weigh the required raw materials according to the weight percentage of the formula, and prepare the required mixing equipment and storage containers;

[0032] S2: Mixing: putting the polyacrylamide, silanol, silicon dioxide and sodium gluconate into a dry stirring container and premixing them at a preset speed to make them evenly distributed;

[0033] S3: stirring, adding the mixed raw materials in S2 into the stirring equipment, starting the stirring equipment to stir at a speed of 500-2500r / min, then sequentially adding the surfactant, defoamer, early strength agent, retarder, plasticizer, and appropriate amount of water, and stirring fully after adding;

[0034] S4: heating. During the stirring process, the stirring device is heated, and the performance parameters of the mixed material are monitored in real time, the performance parameters being viscosity, pH value, and acidity and alkalinity; adjustments and optimizations are made according to the real-time situation so that each raw material is fully mixed and evenly mixed. During the stirring process, the raw materials that are difficult to dissolve can be subjected to ultrasonic treatment to promote dissolution;

[0035] S5: Filtration. After stirring evenly, select appropriate filtration equipment to filter the mixed material according to the production scale and filtration accuracy to remove possible impurities or incompletely dissolved particles;

[0036] S6: Packaging, collecting the filtered mortar additive filtrate into a clean container, packaging and storing it.

[0037] Embodiment 2:

[0038] The weight percentages of the raw materials are: polyacrylamide 0.1%-0.5%, silanol 35%-50%, silicon dioxide 12%-20%, sodium gluconate 10%-15%, surfactant 2%-4%, defoamer 0.1%-0.3%, early strength agent 1%-5%, retarder 1%-3%, plasticizer 1%-3%;

[0039] S1: Raw material preparation: weigh the required raw materials according to the weight percentage of the formula, and prepare the required mixing equipment and storage containers;

[0040] S2: Mixing: putting the polyacrylamide, silanol, silicon dioxide and sodium gluconate into a dry stirring container and premixing them at a preset speed to make them evenly distributed;

[0041] S3: stirring, adding the mixed raw materials in S2 into the stirring equipment, starting the stirring equipment to stir at a speed of 1500r / min, then sequentially adding the surfactant, defoamer, early strength agent, retarder, plasticizer, and appropriate amount of water, and stirring fully after adding;

[0042] S4: heating. During the stirring process, the stirring device is heated to 80-120° C. for 45-60 minutes, and the performance parameters of the mixed material are monitored in real time, the performance parameters being viscosity, pH value, and acidity and alkalinity; adjustments and optimizations are made according to the real-time situation to ensure that the various raw materials are fully mixed and uniformly mixed. During the stirring process, the raw materials that are difficult to dissolve can be subjected to ultrasonic treatment to promote dissolution;

[0043] S5: Filtration. After stirring evenly, select appropriate filtration equipment to filter the mixed material according to the production scale and filtration accuracy to remove possible impurities or incompletely dissolved particles;

[0044] S6: Packaging, collecting the filtered mortar additive filtrate into a clean container, packaging and storing it.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A novel mortar additive and a preparation method thereof, characterized in that: It includes the following raw materials: polyacrylamide, silanol, silicon dioxide, sodium gluconate, surfactant, defoamer, early strength agent, retarder and plasticizer.

2. The novel mortar additive and preparation method thereof according to claim 1, characterized in that: The weight percentages of the raw materials are: polyacrylamide 0.05%-0.15%, silanol 18%-60%, silicon dioxide 6%-30%, sodium gluconate 5%-25%, surfactant 1%-14%, defoamer 0.05%-0.4%, early strength agent 0.05%-6%, retarder 0.05%-4%, and plasticizer 0.05%-4%.

3. The novel mortar additive and preparation method thereof according to claim 2, characterized in that: The weight percentages of the raw materials are: polyacrylamide 0.1%-0.5%, silanol 35%-50%, silicon dioxide 12%-20%, sodium gluconate 10%-15%, surfactant 2%-4%, defoamer 0.1%-0.3%, early strength agent 1%-5%, retarder 1%-3%, and plasticizer 1%-3%.

4. The novel mortar additive and preparation method thereof according to claim 3, characterized in that: The early strength agent includes: an inorganic salt early strength agent and an organic amine early strength agent, wherein the inorganic salt early strength agent is calcium chloride or sodium sulfate; and the organic amine early strength agent is triethanolamine.

5. The novel mortar additive and preparation method thereof according to claim 4, characterized in that: The retarder includes: one or more of citric acid, tartaric acid, glucose, calcium lignin sulfonate, and sodium lignin sulfonate.

6. The novel mortar additive and preparation method thereof according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1: Raw material preparation: weigh the required raw materials according to the weight percentage of the formula, and prepare the required mixing equipment and storage containers; S2: Mixing: putting the polyacrylamide, silanol, silicon dioxide and sodium gluconate into a dry stirring container and pre-mixing them at a preset speed; S3: stirring, adding the mixed raw materials in S2 into the stirring equipment, starting the stirring equipment to stir at a speed of 500-2500r / min, then sequentially adding the surfactant, defoamer, early strength agent, retarder, plasticizer, and appropriate amount of water, and stirring fully after adding; S4: heating, during the stirring process, heating the stirring device, and monitoring the performance parameters of the mixed material in real time, and adjusting and optimizing according to the real-time situation; S5: Filter. After stirring evenly, select appropriate filtering equipment to filter the mixed material according to the production scale and filtering accuracy; S6: Packaging, collecting the filtered mortar additive filtrate into a clean container, packaging and storing it.

7. The novel mortar additive and preparation method thereof according to claim 6, characterized in that: The rotation speed of the stirring device in S3 is 1500r / min.

8. The novel mortar additive and preparation method thereof according to claim 6, characterized in that: The heating temperature in S4 is 80-120° C. and the heating time is 45-60 min.