CN115286284A - Additive for improving strength and water resistance of mortar and preparation process thereof - Google Patents
Additive for improving strength and water resistance of mortar and preparation process thereof Download PDFInfo
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- CN115286284A CN115286284A CN202211017499.8A CN202211017499A CN115286284A CN 115286284 A CN115286284 A CN 115286284A CN 202211017499 A CN202211017499 A CN 202211017499A CN 115286284 A CN115286284 A CN 115286284A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/022—Carbon
- C04B14/024—Graphite
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/04—Silica-rich materials; Silicates
- C04B14/06—Quartz; Sand
- C04B14/062—Microsilica, e.g. colloïdal silica
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/38—Fibrous materials; Whiskers
- C04B14/42—Glass
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B16/00—Use of organic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of organic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B16/04—Macromolecular compounds
- C04B16/06—Macromolecular compounds fibrous
- C04B16/0616—Macromolecular compounds fibrous from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B16/0625—Polyalkenes, e.g. polyethylene
- C04B16/0633—Polypropylene
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B16/00—Use of organic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of organic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B16/04—Macromolecular compounds
- C04B16/06—Macromolecular compounds fibrous
- C04B16/0616—Macromolecular compounds fibrous from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B16/0641—Polyvinylalcohols; Polyvinylacetates
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/0013—Boron compounds
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/28—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/281—Polyepoxides
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/60—Agents for protection against chemical, physical or biological attack
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/60—Agents for protection against chemical, physical or biological attack
- C04B2103/63—Flame-proofing agents
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/60—Agents for protection against chemical, physical or biological attack
- C04B2103/65—Water proofers or repellants
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/60—Agents for protection against chemical, physical or biological attack
- C04B2103/67—Biocides
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- Chemical & Material Sciences (AREA)
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- Materials Engineering (AREA)
- Structural Engineering (AREA)
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Abstract
The invention belongs to the technical field of mortar additives, and particularly relates to an additive for improving the strength and the water resistance of mortar and a preparation process thereof. The composition comprises the following components in parts by weight: 5-10 parts of polytetrafluoroethylene, 10-20 parts of quartz powder, 5-10 parts of silicon carbide, 5-10 parts of graphene, 5-8 parts of epoxy resin curing agent, 5-8 parts of high silica glass fiber, 1-5 parts of polyvinyl alcohol fiber, 2-5 parts of polypropylene fiber, 1-1.5 parts of sodium stearate, 5-10 parts of epoxy emulsion, 3-5 parts of redispersible latex powder, 0.2-0.5 part of zinc borate, 0.1-0.2 part of water reducing agent, 0.5-1 part of hydroxypropyl methyl cellulose and 0.2-0.5 part of defoaming agent. The additive provided by the invention is added into mortar, so that the mortar can be effectively prevented from cracking, the obtained mortar has excellent waterproofness, compressive strength and flexural strength, and the comprehensive mechanical properties of the mortar are remarkably improved.
Description
Technical Field
The invention belongs to the technical field of mortar additives, and particularly relates to an additive for improving the strength and the water resistance of mortar and a preparation process thereof.
Background
Mortar is a bonding substance used for building bricks on buildings, and is formed by adding water into sand and cementing materials (cement, lime paste, clay and the like) according to a certain proportion, is also called mortar and is also used as mortar. Ordinary mortar, concrete, is not dense to water but permeable. Water is a key material that causes durability damage to mortar and concrete structures. The freeze-thaw damage of mortar and concrete, alkali-aggregate reaction, chloride ion, acid radical ion corrosion and the like, and the corrosion of hydraulic engineering and steelwork structures are caused by the water-proof failure and the migration and the entry of water as a carrier of harmful chloride ion and acid radical ion.
With the development of the technology, the traditional cement mortar material gradually exposes various defects in application, such as low strength, poor bonding capability, easy hollowing and cracking of the wall surface, poor water resistance and wall leakage caused by the poor water resistance and the like.
In recent years, due to increasing demands for energy-saving, environment-friendly, high-strength, weather-resistant and water-resistant mortar, mortar materials are rapidly developed, and related research contents are more and more; for example, the document discloses a preparation method of epoxy polymer modified cement mortar, which mainly uses water-based epoxy resin, a curing agent, cement and sand, and the prepared cement mortar has better compressive strength and seepage resistance; but the compressive strength and the impermeability are improved, and other properties of the material are inevitably reduced, such as the breaking strength and the bonding strength which are far from meeting the use requirements.
Therefore, how to obtain mortar with excellent comprehensive performance and water resistance and high strength is a technical problem which needs to be solved urgently by the technical personnel in the field.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the additive for improving the strength and the waterproof performance of the mortar and the preparation process thereof, and the prepared mortar not only needs to meet all aspects of performances in architectural mechanics, but also has the performances of weather resistance, crack resistance, bonding strength and the like, and simultaneously can meet the spectrum antibacterial performance.
In order to achieve the above purpose, the specific steps are as follows:
an additive for improving the strength and the water resistance of mortar comprises the following components in parts by weight:
5-10 parts of polytetrafluoroethylene, 10-20 parts of quartz powder, 5-10 parts of silicon carbide, 5-10 parts of graphene, 5-8 parts of epoxy resin curing agent, 5-8 parts of high silica glass fiber, 1-5 parts of polyvinyl alcohol fiber, 2-5 parts of polypropylene fiber, 1-1.5 parts of sodium stearate, 5-10 parts of epoxy emulsion, 3-5 parts of redispersible emulsion powder, 0.2-0.5 part of zinc borate, 0.1-0.2 part of water reducing agent, 0.5-1 part of hydroxypropyl methyl cellulose and 0.2-0.5 part of defoaming agent.
Furthermore, the particle size of the quartz powder is less than or equal to 10 microns.
Further, the mass ratio of the quartz powder to the graphene is 2-3.
Furthermore, the epoxy resin is E44 type epoxy resin and bisphenol A type epoxy resin, and the mass ratio of the epoxy resin to the bisphenol A type epoxy resin is 1.
Further, the mass ratio of the high silica glass fiber, the polyvinyl alcohol fiber and the polypropylene fiber is (1-3): 1.
further, the water reducing agent is selected from one or more of an ether polycarboxylic acid water reducing agent and an ester polycarboxylic acid water reducing agent.
Further, the defoaming agent is selected from one or more of polyether defoaming agent and polyether modified silicon.
A preparation method of an additive for improving the strength and the water resistance of mortar mainly comprises the following steps:
(1) Weighing raw materials according to a ratio;
(2) Firstly, polytetrafluoroethylene, quartz, silicon carbide and graphene are stirred for 2-5min at the speed of 40-100r/min, then high silica glass fiber, polyvinyl alcohol fiber and polypropylene fiber are added, stirring is carried out for 5-10min at the speed of 80-100r/min, finally epoxy resin curing agent, sodium stearate, epoxy emulsion, redispersible emulsion powder, zinc borate, water reducing agent, hydroxypropyl methyl cellulose and defoaming agent are added, and stirring is carried out for 30-60min at the speed of 300-350r/min, thus obtaining the additive.
The invention has the advantages and the technical effects that:
(1) The invention introduces high silica glass fiber, polyvinyl alcohol fiber and polypropylene fiber, and the high silica glass fiber, the polyvinyl alcohol fiber and the polypropylene fiber are mixed with graphene, E44 type epoxy resin and bisphenol A type epoxy resin for use, wherein the high silica glass fiber is not suitable for being too few, and the preferred mass ratio of the high silica glass fiber to the polyvinyl alcohol fiber to the polypropylene fiber is 3; the graphene/E44 epoxy resin/bisphenol A epoxy resin mixture is mixed with graphene, E44 epoxy resin and bisphenol A epoxy resin to be used as an additive to be added into mortar, so that the comprehensive mechanical property of the mortar is obviously improved, the mortar can be effectively prevented from cracking, the strength is improved, the ductility and the extensibility are improved, and the obtained mortar has excellent waterproofness, compressive strength and flexural strength.
(2) The invention starts from the internal reason of mortar water seepage, and the current causes of water seepage and cracks of the building mortar have two aspects: one is that the mortar is in a crack inside the mortar, the mortar is on the upstream surface, and under the action of hydrostatic pressure on two interfaces of the mortar, water can penetrate through gaps formed by the mortar and can freely move inside the mortar; and secondly, gaps in the mortar are formed, a plurality of capillaries exist in the mortar due to the defects of the internal structure of the mortar, and the water directly penetrates through the surface of the mortar under the action of the attraction formed by the capillary action. The quartz powder and the graphene are creatively adopted and combined, and the structure of the graphene is very stable, the connection between the internal carbon atoms is very flexible, and when external force is applied to the graphene, the surfaces of the carbon atoms can be bent and deformed, so that the carbon atoms do not need to be rearranged to adapt to the external force, and the structural stability is maintained. Due to the fact that the interatomic force is very strong, even if the surrounding carbon atoms are extruded and collided at normal temperature, interference on electrons in the graphene is very small. Therefore, when the silica gel is mixed with cement and water and stirred, the silica gel is hydrolyzed into sol, and the sol molecules can permeate into capillary pores in the cement slurry to block and cut off the capillary pores, and simultaneously limit the grain size of quartz powder to be less than or equal to 10 microns, so that the silica gel can fill the concrete pores and increase the compactness of set cement. The mass ratio of quartz powder to graphene is further limited to be 2-3, and the different proportions of quartz powder and graphene, which are combined with each other, have different knot sizes, micro morphologies, network structures and the like, which all affect the stability and waterproof performance of the quartz powder and graphene; the internal structure is influenced when the proportion is too large, and the breaking strength is reduced when the proportion is too small; under the mutual common physical and chemical action of the quartz powder and the graphene under the condition of the proportion, the compactness of the set cement is continuously enhanced along with the continuous hydration of the cement, and the comprehensive performance of the mortar is improved.
The invention improves the microstructure of the mortar, fills the microstructure defect of the mortar, seals harmful pore channels in the mortar to block the water from entering, and greatly reduces the water absorption of the mortar, thereby playing the role of water resistance and crack resistance.
(3) The invention also uses zinc borate, which is a high-efficiency flame retardant, most of mortar adopts epoxy resin or epoxy emulsion in the technical research of improving the strength, and the mortar can release harmful smoke when suffering from fire, and the zinc borate is added in the invention, so that the flame retardance can be realized, and the release of the harmful smoke can be reduced; even if the fire disaster happens, harmful gas can not be generated, the harm to human bodies can not be generated, and the fire disaster prevention and control device is safe and environment-friendly.
Detailed Description
The present invention will be described in detail below with reference to examples, but the present invention is not limited to these examples.
The term "and/or" in the present invention is only an association relationship describing an associated object, and means that there may be three relationships, for example, a and/or B, which may mean: a exists alone, B exists alone, and A and B exist at the same time;
the term "at least one" in the present invention is only an association relationship describing an associated object, and means that three relationships may exist, for example, at least one of a and B may mean: a exists alone, A and B exist simultaneously, and B exists alone.
It is further noted that, in the present invention, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion.
The additive prepared by the embodiment belongs to a general product, and is used in mortar with high requirements on mechanical properties such as waterproofness, folding resistance and shrinkage resistance, such as building surface mortar.
Instructions for use:
firstly, mixing main mixed materials for preparing mortar to obtain mixed slurry; then, taking the mass of the mixed slurry as reference, adding 1-5% of additive by mass.
Example 1:
an additive for improving mortar strength and water resistance comprises the following components in parts by weight:
5 parts of polytetrafluoroethylene, 15 parts of quartz powder, 5 parts of silicon carbide, 5 parts of graphene, 5 parts of epoxy resin curing agent, 5 parts of high silica glass fiber, 2.5 parts of polyvinyl alcohol fiber, 2.5 parts of polypropylene fiber, 1 part of sodium stearate, 5 parts of epoxy emulsion, 3 parts of redispersible latex powder, 0.3 part of zinc borate, 0.1 part of ether polycarboxylic acid water reducer, 0.5 part of hydroxypropyl methyl cellulose and 0.3 part of polyether defoamer.
Wherein the particle size of the quartz powder is less than or equal to 10 microns; the epoxy resin is E44 type epoxy resin and bisphenol A type epoxy resin, and the mass ratio of the epoxy resin to the bisphenol A type epoxy resin is 1;
the preparation process of the additive for improving the strength and the waterproof performance of the mortar mainly comprises the following steps:
(1) Weighing raw materials according to a ratio;
(2) Firstly, polytetrafluoroethylene, quartz, silicon carbide and graphene are stirred for 5min at the speed of 40r/min, then high silica glass fiber, polyvinyl alcohol fiber and polypropylene fiber are added, stirring is carried out for 8min at the speed of 80r/min, finally epoxy resin curing agent, sodium stearate, epoxy emulsion, redispersible emulsion powder, zinc borate, water reducing agent, hydroxypropyl methyl cellulose and defoaming agent are added, and stirring is carried out for 30min at the speed of 300r/min, so that the additive is obtained.
Example 2:
an additive for improving mortar strength and water resistance comprises the following components in parts by weight:
10 parts of polytetrafluoroethylene, 10 parts of quartz powder, 6 parts of silicon carbide, 10 parts of graphene, 8 parts of epoxy resin curing agent, 5 parts of high silica glass fiber, 5 parts of polyvinyl alcohol fiber, 5 parts of polypropylene fiber, 1 part of sodium stearate, 10 parts of epoxy emulsion, 3 parts of redispersible latex powder, 0.2 part of zinc borate, 0.2 part of ether polycarboxylic acid water reducing agent, 0.5 part of hydroxypropyl methyl cellulose and 0.5 part of polyether defoamer.
Wherein the particle size of the quartz powder is less than or equal to 10 microns; the epoxy resin is E44 type epoxy resin and bisphenol A type epoxy resin, and the mass ratio of the epoxy resin to the bisphenol A type epoxy resin is 1;
the preparation process of the additive for improving the strength and the waterproof performance of the mortar mainly comprises the following steps:
(1) Weighing raw materials according to a ratio;
(2) Firstly, polytetrafluoroethylene, quartz, silicon carbide and graphene are stirred for 3min at the speed of 60r/min, then high silica glass fiber, polyvinyl alcohol fiber and polypropylene fiber are added, the mixture is stirred for 10min at the speed of 80r/min, finally epoxy resin curing agent, sodium stearate, epoxy emulsion, redispersible emulsion powder, zinc borate, water reducing agent, hydroxypropyl methyl cellulose and defoaming agent are added, and the additive is obtained after the mixture is stirred for 40min at the speed of 300 r/min.
Example 3:
an additive for improving strength and waterproof performance of mortar comprises the following components in parts by weight:
8 parts of polytetrafluoroethylene, 18 parts of quartz powder, 10 parts of silicon carbide, 6 parts of graphene, 8 parts of epoxy resin curing agent, 6 parts of high silica glass fiber, 2 parts of polyvinyl alcohol fiber, 2 parts of polypropylene fiber, 1.5 parts of sodium stearate, 8 parts of epoxy emulsion, 3 parts of redispersible latex powder, 0.3 part of zinc borate, 0.2 part of ether polycarboxylic acid water reducer, 0.8 part of hydroxypropyl methyl cellulose and 0.6 part of polyether defoamer.
Wherein the particle size of the quartz powder is less than or equal to 10 microns; the epoxy resin is E44 type epoxy resin and bisphenol A type epoxy resin, and the mass ratio of the epoxy resin to the bisphenol A type epoxy resin is 1;
the preparation process of the additive for improving the strength and the water resistance of the mortar mainly comprises the following steps:
(1) Weighing raw materials according to a ratio;
(2) Firstly, polytetrafluoroethylene, quartz, silicon carbide and graphene are stirred for 5min at the speed of 60r/min, then high silica glass fiber, polyvinyl alcohol fiber and polypropylene fiber are added, stirring is carried out for 6min at the speed of 100r/min, finally epoxy resin curing agent, sodium stearate, epoxy emulsion, redispersible emulsion powder, zinc borate, water reducing agent, hydroxypropyl methyl cellulose and defoaming agent are added, and stirring is carried out for 40min at the speed of 350r/min, so that the additive is obtained.
The application comprises the following steps: selecting main materials of cement, sand, gypsum, water and fly ash; the additive prepared in example 3 was used as a specific additive.
Application example 1:
firstly, sulphoaluminate cement (42.5), river sand, gypsum, water and fly ash are mixed according to the mass ratio: 1:1.5:3:0.4:0.15, obtaining mixed slurry; then, an additive was added in an amount of 1% by mass based on the mixed slurry.
Application example 2:
firstly, sulphoaluminate cement (42.5), river sand, gypsum, water and fly ash are mixed according to the mass ratio: 1:1.5:3:0.4:0.15, obtaining mixed slurry; then, with reference to the mixed slurry, 3% by mass of the additive was added.
Application example 3:
firstly, sulphoaluminate cement (42.5), river sand, gypsum, water and fly ash are mixed according to the mass ratio: 1:1.5:3:0.4:0.15, obtaining mixed slurry; then, with reference to the mixed slurry, 5% by mass of the additive was added.
Application comparative example 1:
sulphoaluminate cement (42.5), river sand, gypsum, water and fly ash are mixed according to the mass ratio: 1:1.5:3:0.4:0.15 to obtain mixed slurry.
The performance of the mortars prepared in the application examples 1-3 and the application comparative example 1 is detected according to the regulation of JC/T984-2005 Polymer Cement waterproof mortar; wherein the water impermeability test is carried out by preparing a mortar square block with the length multiplied by the width multiplied by the height of 30cm multiplied by 2 cm;
the mortar performance test shows the concrete results in table 1;
the additive provided by the invention is added into mortar, so that the mortar can be effectively prevented from cracking, the obtained mortar has excellent waterproofness, compressive strength and flexural strength, and the comprehensive mechanical property of the mortar is obviously improved.
Description of the invention: the above embodiments are only used to illustrate the present invention and do not limit the technical solutions described in the present invention; thus, while the present invention has been described in detail with reference to the various embodiments thereof, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted; all such modifications and variations are intended to be included herein within the scope of this disclosure and the present invention and protected by the following claims.
Claims (8)
1. The additive for improving the strength and the waterproof performance of the mortar is characterized by comprising the following components in parts by weight:
5-10 parts of polytetrafluoroethylene, 10-20 parts of quartz powder, 5-10 parts of silicon carbide, 5-10 parts of graphene, 5-8 parts of epoxy resin curing agent, 5-8 parts of high silica glass fiber, 1-5 parts of polyvinyl alcohol fiber, 2-5 parts of polypropylene fiber, 1-1.5 parts of sodium stearate, 5-10 parts of epoxy emulsion, 3-5 parts of redispersible emulsion powder, 0.2-0.5 part of zinc borate, 0.1-0.2 part of water reducing agent, 0.5-1 part of hydroxypropyl methyl cellulose and 0.2-0.5 part of defoaming agent.
2. The additive for improving the strength and the water resistance of mortar according to claim 1, wherein the particle size of the quartz powder is less than or equal to 10 microns.
3. The additive for improving the mortar strength and the waterproof performance of the mortar according to claim 2, wherein the mass ratio of the quartz powder to the graphene is 2-3.
4. The additive for improving the strength and the water resistance of mortar according to claim 1, wherein the epoxy resin is E44 type epoxy resin and bisphenol A type epoxy resin, and the mass ratio of the epoxy resin to the bisphenol A type epoxy resin is 1.
5. The additive for improving the strength and the water resistance of the mortar according to claim 1, wherein the mass ratio of the high silica glass fiber, the polyvinyl alcohol fiber and the polypropylene fiber is 1-3: 1.
6. the additive for improving the strength and the water resistance of the mortar according to claim 1, wherein the water reducing agent is one or more selected from the group consisting of ether polycarboxylic acid water reducing agents and ester polycarboxylic acid water reducing agents.
7. The additive for improving the strength and the water resistance of the mortar according to claim 1, wherein the defoamer is one or more selected from polyether defoamers and polyether modified silicon.
8. The preparation process of the additive for improving the mortar strength and the waterproof performance according to any one of claims 1 to 7, which is characterized by comprising the following steps:
(1) Weighing raw materials according to a ratio;
(2) Firstly, polytetrafluoroethylene, quartz, silicon carbide and graphene are stirred for 2-5min at the speed of 40-100r/min, then high silica glass fiber, polyvinyl alcohol fiber and polypropylene fiber are added, stirring is carried out for 5-10min at the speed of 80-100r/min, finally epoxy resin curing agent, sodium stearate, epoxy emulsion, redispersible emulsion powder, zinc borate, water reducing agent, hydroxypropyl methyl cellulose and defoaming agent are added, and stirring is carried out for 30-60min at the speed of 300-350r/min, thus obtaining the additive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211017499.8A CN115286284A (en) | 2022-08-23 | 2022-08-23 | Additive for improving strength and water resistance of mortar and preparation process thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211017499.8A CN115286284A (en) | 2022-08-23 | 2022-08-23 | Additive for improving strength and water resistance of mortar and preparation process thereof |
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| CN115286284A true CN115286284A (en) | 2022-11-04 |
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| CN202211017499.8A Pending CN115286284A (en) | 2022-08-23 | 2022-08-23 | Additive for improving strength and water resistance of mortar and preparation process thereof |
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| CN (1) | CN115286284A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104058680A (en) * | 2014-05-28 | 2014-09-24 | 安徽阜阳富龙建筑材料有限责任公司 | Highly waterproof flame-retardant thermal-insulation mortar and preparation method thereof |
| CN104860615A (en) * | 2015-03-27 | 2015-08-26 | 万华节能科技集团股份有限公司 | Mortar for concrete base surface repair, and preparation method thereof |
| CN108424036A (en) * | 2018-05-07 | 2018-08-21 | 滁州市炬基节能新型建材有限公司 | Additive of dry-mixed mortar and preparation method thereof |
| CN109574591A (en) * | 2018-12-21 | 2019-04-05 | 科顺防水科技股份有限公司 | A kind of leveling mortar with water-proof function |
| CN111302724A (en) * | 2018-12-11 | 2020-06-19 | 北京海普斯建材有限公司 | Dry-mixed plastering mortar and preparation method thereof |
-
2022
- 2022-08-23 CN CN202211017499.8A patent/CN115286284A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104058680A (en) * | 2014-05-28 | 2014-09-24 | 安徽阜阳富龙建筑材料有限责任公司 | Highly waterproof flame-retardant thermal-insulation mortar and preparation method thereof |
| CN104860615A (en) * | 2015-03-27 | 2015-08-26 | 万华节能科技集团股份有限公司 | Mortar for concrete base surface repair, and preparation method thereof |
| CN108424036A (en) * | 2018-05-07 | 2018-08-21 | 滁州市炬基节能新型建材有限公司 | Additive of dry-mixed mortar and preparation method thereof |
| CN111302724A (en) * | 2018-12-11 | 2020-06-19 | 北京海普斯建材有限公司 | Dry-mixed plastering mortar and preparation method thereof |
| CN109574591A (en) * | 2018-12-21 | 2019-04-05 | 科顺防水科技股份有限公司 | A kind of leveling mortar with water-proof function |
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