CN113896481A - Normal-temperature self-crosslinking water-based epoxy resin modified cement-based mortar bi-component material - Google Patents
Normal-temperature self-crosslinking water-based epoxy resin modified cement-based mortar bi-component material Download PDFInfo
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- CN113896481A CN113896481A CN202111320588.5A CN202111320588A CN113896481A CN 113896481 A CN113896481 A CN 113896481A CN 202111320588 A CN202111320588 A CN 202111320588A CN 113896481 A CN113896481 A CN 113896481A
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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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/06—Aluminous cements
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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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
Abstract
The invention provides a normal-temperature self-crosslinking water-based epoxy resin modified cement-based mortar bi-component material. The bi-component material comprises a component A and a component B, wherein the component A comprises 12-30 wt% of normal-temperature self-crosslinking water-based epoxy resin, optionally 0.10-1.0 wt% of defoaming agent and the balance of water, the epoxy equivalent of the normal-temperature self-crosslinking water-based epoxy resin is 300-600, the component B comprises cement, sand, anti-settling agent, water reducing agent and defoaming agent, the component A and the component B are packaged independently, and the bi-component material does not contain a curing agent. The invention also provides cement mortar. The cement mortar prepared from the bi-component material has the characteristics of excellent mechanical strength, good impact toughness and cracking resistance, excellent water resistance and impermeability, good volume stability, high wear resistance and frost resistance, high hardness, grade A fire resistance, environmental safety and the like.
Description
Technical Field
The invention relates to the technical field of chemical building materials, in particular to a normal-temperature self-crosslinking water-based epoxy resin modified cement-based mortar bi-component material.
Background
The cement product has the characteristics of low price, bearing pressure resistance, water resistance, moisture resistance, fire resistance, environmental protection, safety and the like, so that the cement and steel jointly form the most important building material. However, common cement products are the most typical brittle materials, are not resistant to pressure and pulling and are not resistant to folding, the porosity of the internal structure enables the cement products to be water-resistant, but not impervious, difficult to clean, and the cement products are easy to generate drying shrinkage, moist and swelling due to changes of environmental humidity, so that the problems of unstable volume, drying cracking and the like exist. Therefore, various modification methods for cement-based materials are carried out.
The polymer resin modified Cement-based material has obvious effect on improving the toughness and impermeability of the material, wherein the waterborne Epoxy resin modified Cement-based material which is known as ECC Technology in the industry is rapidly developed, and the material has excellent performances in the aspects of mechanical strength, crack resistance, impact toughness, permeation resistance, moisture and water resistance, wear resistance, fire resistance, environmental protection safety and the like, so the material is applied to the fields with high performance requirements such as structure reinforcement, heavy-load terrace, chemical corrosion resistance, moisture and water resistance and the like.
The epoxy resin applied to the modified cement material is generally low molecular weight bisphenol A diglycidyl ether (bisphenol A type epoxy resin shown in the structural formula 1), the general specifications are E-51 and E-44, the typical value of epoxy equivalent is 190-. The emulsified epoxy resin water-based emulsion and aliphatic amine or alicyclic amine curing agent are subjected to crosslinking reaction at normal temperature to form a high-strength high-toughness three-dimensional crosslinking network body, and the high-strength high-toughness three-dimensional crosslinking network body and a cement hardened body are combined into an interpenetrating network structure, so that the functions of strengthening and improving the material performance are achieved.
The crosslinking reaction of the epoxy resin has two modes of external crosslinking and self-crosslinking. External crosslinking means that an additionally added active group is crosslinked and cured with the epoxy resin. The existing water-borne epoxy resin modified cement adopts an external crosslinking type double-liquid-component system, and a curing agent is added before construction. From the practical application, the system of the external crosslinking curing reaction has fast reaction speed of the resin and the curing agent, complete crosslinking and the characteristic of the crosslinked resin can be quickly embodied in the modified cement-based material, so the material characterized by ECC technology is widely applied. However, short sheets of water-based epoxy modified cement-based materials that are externally cross-linked are also very apparent. Firstly, the application of the external crosslinking epoxy cement system has high requirements on the use environment, the high-temperature curing in summer is fast, the working life is short, the low-temperature curing in winter is slow or even no curing, and the drying and hardening time is obviously prolonged or even no curing when the external crosslinking epoxy cement system is used in a high-humidity environment, underground or closed space. Secondly, when in use, the epoxy resin and the curing agent must be uniformly premixed and required to be timely stirred with the powder part, and the production and the use of the material are relatively complex.
The self-crosslinking means that the polymer resin has one or more active groups and is crosslinked under the action of heating or a catalyst, and the normal-temperature self-crosslinking not only solves the defects and contradictions existing in an external crosslinking mode due to the advantages of the temperature condition of a curing reaction, but also brings great convenience to the production, storage and application of materials and has good market application prospect.
The epoxy resin can be cured according to the following reaction formula 1 under the alkaline environment formed by cement hydration, which is the application basis of a self-crosslinking mode in the field of epoxy resin modified cement:
in the research and practice of the prior self-crosslinking water-based epoxy resin modified cement-based material without matching of curing agent, the adopted epoxy resin is still the low molecular weight bisphenol A epoxy resin emulsion widely applied in ECC technology. The cement-based material modified by the way has obviously improved impermeability and anti-carbonization capability, but has limited improvement on mechanical strength and toughness, and no practical application value. Although studies have been made to further improve the mechanical properties of the cured products by means of high-temperature and high-humidity curing, no commercial products have yet been available.
Disclosure of Invention
The invention mainly provides a normal-temperature self-crosslinking water-based epoxy resin modified cement-based mortar bi-component material, wherein the bi-component material comprises the following components in parts by weight: the component A comprises: the self-crosslinking type epoxy resin composition comprises 12-30 wt%, preferably 15-25 wt% of normal-temperature self-crosslinking type water-based epoxy resin, optional 0.10-1.0 wt% of defoaming agent and the balance of water, wherein the weight of the component A is calculated by the total weight of the component A; wherein the normal-temperature self-crosslinking water-based epoxy resin is a normal-temperature self-crosslinking water-based epoxy resin with the epoxy equivalent weight of 300-600, preferably 300-550 and more preferably 400-550, and preferably is bisphenol A epoxy resin; and a component B: it contains cement, sand, anti-settling agent, water reducing agent and defoaming agent; wherein the A component and the B component are packaged independently, and the two-component material does not contain a curing agent.
In one or more embodiments, the room temperature self-crosslinking water-based epoxy resin is provided in the form of an emulsion, and the component a contains a room temperature self-crosslinking water-based epoxy resin emulsion, water and an optional defoaming agent, wherein the content of the room temperature self-crosslinking water-based epoxy resin emulsion is 30-50 wt%, preferably 35-45 wt%, based on the total weight of the component a.
In one or more embodiments, the a component comprises, based on the total weight of the a component: 35-45 wt% of the normal-temperature self-crosslinking water-based epoxy resin emulsion, 0.50-0.80 wt% of a defoaming agent and the balance of water, wherein the normal-temperature self-crosslinking water-based epoxy resin is bisphenol A epoxy resin emulsion with the epoxy equivalent of 400-550.
In one or more embodiments, the a component comprises, based on the total weight of the a component: 35-45 wt% of the normal-temperature self-crosslinking water-based epoxy resin emulsion, 0.55-0.80 wt% of a defoaming agent and the balance of water, wherein the normal-temperature self-crosslinking water-based epoxy resin is bisphenol A epoxy resin emulsion with the epoxy equivalent of 550.
In one or more embodiments, the a component comprises, based on the total weight of the a component: 35-45 wt% of the normal-temperature self-crosslinking water-based epoxy resin emulsion, 0.55-0.80 wt% of a defoaming agent and the balance of water, wherein the normal-temperature self-crosslinking water-based epoxy resin is bisphenol A epoxy resin emulsion with the epoxy equivalent of 300.
In one or more embodiments, the a component comprises, based on the total weight of the a component: 35-45 wt% of the normal-temperature self-crosslinking water-based epoxy resin emulsion, 0.55-0.80 wt% of a defoaming agent and the balance of water, wherein the normal-temperature self-crosslinking water-based epoxy resin is bisphenol A epoxy resin emulsion with the epoxy equivalent of 400.
In one or more embodiments, the B component comprises, based on the total weight of the B component:
20-45 wt%, preferably 30-40 wt%, more preferably 35-40 wt% cement,
45-70 wt.%, preferably 55-70 wt.%, more preferably 58-65 wt.% of sand,
0.005-0.05 wt.%, preferably 0.005-0.02 wt.%, of an anti-settling agent,
0.10-0.30 wt.%, preferably 0.13-0.25 wt.% of a water reducing agent, and
0.05-0.30 wt%, preferably 0.08-0.25 wt%, more preferably 0.12-0.18 wt% of a defoaming agent.
In one or more embodiments, the defoamer is selected from a mineral oil type defoamer, a non-mineral oil type defoamer, or a combination.
In one or more embodiments, the cement is selected from one or more of ordinary portland cement, white portland cement, high belite sulphoaluminate cement, and aluminate cement.
In one or more embodiments, the sand is calcium sand, quartz sand, or a combination thereof.
In one or more embodiments, the anti-settling agent is selected from one or more of fumed silica, organically modified bentonite, and attapulgite.
In one or more embodiments, the water reducer is selected from one or more of a polycarboxylic acid high efficiency water reducer, a naphthalene based water reducer, and a melamine based water reducer.
In one or more embodiments, the a component also contains a pigment or mill base.
In one or more embodiments, the B component further comprises one or more of 0-20 wt% of quartz powder or heavy calcium powder, 0-2.0 wt% of expanding agent, 0-1.0 wt% of anti-cracking fiber, 0-0.05 wt% of thickening agent, 0-0.10 wt% of coagulant, 0-0.20 wt% of retarder and 0-0.01 wt% of thixotropic agent based on the total weight of the B component.
In one or more embodiments, the swelling agent is selected from calcium sulfoaluminate based swelling agents, calcium oxide based swelling agents, or combinations thereof.
In one or more embodiments, the crack resistant fibers are selected from one or more of glass fibers, polypropylene monofilament fibers, and steel fibers.
In one or more embodiments, the thickening agent is selected from cellulose ethers, starch ethers, or combinations thereof.
In one or more embodiments, the set accelerator is selected from lithium carbonate, lithium sulfate, calcium formate, or a combination thereof.
In one or more embodiments, the set retarder is selected from citric acid, tartaric acid, sodium citrate, or a combination thereof.
In one or more embodiments, the thixotropic agent is diutan.
In one or more embodiments, the B component comprises, based on the total weight of the B component: 35 to 37 weight percent of ordinary portland cement PO42.5, 50 to 55 weight percent of quartz sand with the grain size of 0.1 to 0.3mm, 8.0 to 10 weight percent of quartz sand with the grain size of 0.3 to 0.6mm, 0.01 to 0.015 weight percent of anti-settling agent, 0.13 to 0.25 weight percent of polycarboxylic acid high-efficiency water reducing agent and 0.10 to 0.18 weight percent of defoaming agent.
In one or more embodiments, the B component comprises, based on the total weight of the B component: 35 to 37 weight percent of white portland cement PW52.5, 50 to 55 weight percent of quartz sand with the grain size of 0.1 to 0.3mm, 8.0 to 10 weight percent of quartz sand with the grain size of 0.3 to 0.6mm, 0.01 to 0.015 weight percent of anti-settling agent, 0.13 to 0.25 weight percent of polycarboxylic acid high-efficiency water reducing agent and 0.10 to 0.18 weight percent of defoaming agent.
In one or more embodiments, the B component comprises, based on the total weight of the B component: 35-38 wt% of high belite sulphoaluminate cement, 50-55 wt% of quartz sand with the particle size of 0.1-0.3mm, 8.0-10 wt% of quartz sand with the particle size of 0.3-0.6mm, 0.01-0.015 wt% of anti-settling agent, 0.13-0.25 wt% of polycarboxylic acid high efficiency water reducing agent, 0.05-0.08 wt% of coagulant, 0.08-0.10 wt% of retarder and 0.10-0.18 wt% of defoaming agent.
In one or more embodiments, in the bicomponent material, the weight ratio of the component A to the component B is 10 to 25: 100, preferably 15-20: 100, more preferably 17 to 18: 100.
the invention also provides a normal-temperature self-crosslinking water-based epoxy resin modified cement mortar, which comprises 5.0-9.0 wt%, preferably 6.0-7.0 wt% of normal-temperature self-crosslinking water-based epoxy resin emulsion, 0.10-1.0 wt%, preferably 0.10-0.50 wt%, more preferably 0.10-0.30 wt% of defoaming agent, 20-40 wt%, preferably 25-35 wt%, more preferably 30-35 wt% of cement, 40-65 wt%, preferably 45-65 wt%, more preferably 50-60 wt% of sand, 0.001-0.01 wt%, preferably 0.005-0.01 wt% of anti-settling agent, 0.10-0.30 wt%, preferably 0.10-0.20 wt% of water reducing agent and the balance of water, based on the total weight of the cement mortar; wherein the normal-temperature self-crosslinking water-based epoxy resin has an epoxy equivalent of 300-600, preferably 300-550, and more preferably 400-550, and preferably bisphenol A epoxy resin, and the cement mortar does not contain a curing agent.
In one or more embodiments, the cement mortar contains the room-temperature self-crosslinking water-based epoxy resin modified cement-based mortar two-component material, or is prepared by the A component and the B component of the room-temperature self-crosslinking water-based epoxy resin modified cement-based mortar two-component material, and optionally adding a proper amount of water.
Detailed Description
It is understood that within the scope of the present invention, the above-mentioned features of the present invention and those specifically described below (e.g., in the examples) can be combined with each other to form a preferred embodiment.
The invention aims to provide a cement-based material modified by a normal-temperature self-crosslinking water-based epoxy resin, which selects the water-based epoxy resin capable of generating a rapid self-crosslinking reaction under the condition of cement hydration liquid phase pH, and slurry prepared from the cement-based material has the characteristics of excellent mechanical strength, good impact toughness and cracking resistance, excellent water resistance and impermeability, good volume stability, high wear resistance and frost resistance, high hardness, A-level fire resistance, environmental safety, low-temperature construction and the like.
Specifically, the two-component mortar material comprises an A component and a B component which are independently packaged; wherein the component A contains normal-temperature self-crosslinking water-based epoxy resin emulsion, water and a defoaming agent; the component B contains cement, sand, anti-settling agent, defoaming agent and water reducing agent, and optionally one or more of quartz powder or heavy calcium powder, expanding agent, anti-cracking fiber, thickening agent, coagulant, retarder and thixotropic agent.
Component A
The component A of the invention can contain normal-temperature self-crosslinking water-based epoxy resin, water and optional defoaming agent.
The epoxy equivalent of the normal-temperature self-crosslinking water-based epoxy resin suitable for the invention is 300-600, preferably 300-550, and more preferably 400-550. Preferably, the room-temperature self-crosslinking water-based epoxy resin is a bisphenol A-type epoxy resin with an epoxy equivalent of 300-600, preferably 300-550, and more preferably 400-550.
The ambient self-crosslinking waterborne epoxy resin described herein can be provided in the form of an emulsion. The emulsion usually contains the room temperature self-crosslinking water-based epoxy resin, water and other additives required for preparing the emulsion, such as an emulsifier and the like. It is to be understood that the other additive components in the emulsion may be conventional components required for formulating emulsions, such as emulsifiers, in low amounts, which are generally used for the purpose of forming emulsions, maintaining emulsion stability, preventing breaking of emulsions, etc., so that these components do not materially affect the final properties of the cementitious mortars of the invention. Preferably, bisphenol a type epoxy resins are used. Epoxy resins having the above epoxy equivalent or emulsions thereof, particularly bisphenol a type epoxy resins or emulsions thereof, are commercially available.
When the A component of the present invention is formulated in the form of an emulsion, the solid content in the emulsion may be 40-60 wt%.
The component A of the invention can contain 12-30 wt%, preferably 15-25 wt% of the normal temperature self-crosslinking water-based epoxy resin with the epoxy equivalent weight in the range of 300-600 based on the total weight of the component A, or can contain 30-50 wt% of the normal temperature self-crosslinking water-based epoxy resin emulsion. In some embodiments, the component A of the present invention contains 35 to 45 wt% of the room temperature self-crosslinking aqueous epoxy resin emulsion.
To eliminate the foam in component A, a defoaming agent may be appropriately added. Suitable defoamers for the a component of the present invention can be defoamers conventional in the art for use in cement, including but not limited to mineral oil type defoamers, non-mineral oil type defoamers, and combinations of one or more defoamers can also be used.
The A component of the present invention may contain 0.10 to 1.0% by weight of an antifoaming agent, preferably 0.30 to 0.80% by weight of an antifoaming agent, more preferably 0.50 to 0.80% by weight of an antifoaming agent, based on the total weight of the A component.
In some embodiments, the A component of the present invention may also contain an appropriate amount of pigment or mill base. The pigment and the color paste can be various pigments and color pastes which are conventional in the field and can be freely added by a user according to the requirements.
The A component of the present invention may contain a balance of water based on the total weight of the A component. In general, the A component may contain from 50 to 70% by weight of water, preferably from 55 to 65% by weight of water.
In some embodiments, the a component of the present invention comprises: 35-45 wt% of normal temperature self-crosslinking water-based epoxy resin emulsion, 0.50-0.80 wt% of defoaming agent and the balance of water, wherein the normal temperature self-crosslinking water-based epoxy resin is bisphenol A epoxy resin emulsion with the epoxy equivalent of 400-550.
In some preferred embodiments, the a component of the present invention comprises: 35-45 wt% of normal-temperature self-crosslinking water-based epoxy resin emulsion, 0.55-0.80 wt% of defoaming agent and the balance of water, wherein the normal-temperature self-crosslinking water-based epoxy resin is bisphenol A epoxy resin emulsion with the epoxy equivalent of 550.
In some other preferred embodiments, the a component of the present invention comprises: 35-45 wt% of normal-temperature self-crosslinking water-based epoxy resin emulsion, 0.55-0.80 wt% of defoaming agent and the balance of water, wherein the normal-temperature self-crosslinking water-based epoxy resin is bisphenol A epoxy resin emulsion with the epoxy equivalent of 300.
In certain specific embodiments, the a component of the present invention comprises: 35 to 45 percent of normal-temperature self-crosslinking water-based epoxy resin emulsion, 0.55 to 0.80 percent of defoaming agent and the balance of water, wherein the normal-temperature self-crosslinking water-based epoxy resin is bisphenol A epoxy resin emulsion with the epoxy equivalent of 400.
Typically, the a component of the present invention is a liquid.
B component
The B component of the present invention is generally a solid. The component B of the invention can contain cement, sand, anti-settling agent, defoaming agent and water reducing agent.
The cement suitable for use in the present invention may be one or more of a variety of cements commonly used in the art, including ordinary portland cement, white portland cement, and special cements. The special cement can be high belite sulphoaluminate cement and aluminate cement.
The content of cement may be in the range of 20 to 45 wt%, preferably in the range of 30 to 40 wt%, more preferably in the range of 35 to 40 wt%, based on the total weight of the B component.
The sand suitable for use in the present invention may be any of a variety of sands commonly used in the art including, but not limited to, calcium sand, quartz sand, or combinations thereof. The sand content may be in the range of 45 to 70 wt%, preferably 55 to 70 wt%, more preferably 58 to 65 wt%, based on the total weight of the B component. The particle size of the sand is not particularly limited and may be determined according to the specific use of the mortar of the present invention. In certain embodiments, the invention uses sand having two particle size ranges, one particle size range between 0.1 and 0.3mm (including 0.3mm), which may be present in an amount of 40 to 60 wt%, preferably 45 to 60 wt%, more preferably 50 to 55 wt%; another range of particle sizes is between 0.3 and 0.6mm (excluding 0.3mm), and may be present in an amount of 5.0 to 10 wt.%, preferably 8.0 to 10 wt.%.
Suitable defoamers for use in the present invention can be any of a variety of defoamers known in the art, including but not limited to mineral oil based defoamers, non-mineral oil based defoamers, and combinations of one or more defoamers can also be used. The content of the defoaming agent is 0.05 to 0.30 wt% of the defoaming agent, preferably 0.08 to 0.25 wt%, more preferably 0.12 to 0.18 wt%, based on the total weight of the B component.
Water reducing agents suitable for use in the present invention include, but are not limited to, polycarboxylic acid high efficiency water reducing agents, naphthalene based water reducing agents, melamine based water reducing agents. Typically, the water reducing agent may be present in the individual B-components of the invention in an amount in the range of from 0.10 to 0.30 wt%. In certain embodiments, the present invention utilizes a polycarboxylic acid superplasticizer in an amount ranging from 0.13 to 0.25 weight percent, such as 0.15 weight percent or 0.2 weight percent.
Suitable anti-settling agents for use in the present invention may be various anti-settling agents known in the art for use in cement mortars, including but not limited to fumed silica and/or organically modified bentonite, attapulgite. In some embodiments, the thickening agent (especially low-viscosity cellulose ether) and diutan are compounded to be used as the anti-settling agent, so that the manufactured product has better flowing property and anti-settling effect than the existing product of the non-diutan anti-settling agent. In the present invention, the content of the anti-settling agent is in the range of 0.005 to 0.05 wt%, preferably 0.005 to 0.02 wt%, based on the total weight of the B component.
The component B of the invention can also contain one or more of quartz powder or heavy calcium powder, an expanding agent, anti-cracking fiber, a thickening agent, a coagulant, a retarder and a thixotropic agent.
The amount of quartz powder or triple superphosphate powder suitable for use in the present invention may be in the range of 0 to 20 wt%, such as 1.0 to 10 wt%, 2.0 to 10 wt%, or 8.0 to 20 wt% in the B component of the present invention. The particle size is not particularly limited and can be determined according to the specific use of the mortar of the present invention.
The swelling agent suitable for use in the present invention includes, but is not limited to, calcium thioaluminate based swelling agents, calcium oxide based swelling agents, or combinations thereof, and may be present in the range of 0 to 2.0 wt% in the B component of the present invention. For example 0-0.50 wt%, 0-1.0 wt% or 1.0-2.0 wt%.
The anti-crack fiber suitable for the present invention includes, but is not limited to, one or more of glass fiber, polypropylene monofilament fiber and steel fiber, and the content thereof in the B component of the present invention may be in the range of 0 to 1.0 wt%. For example 0-0.50 wt% or 0.20-0.80 wt%.
Thickeners suitable for use in the present invention include, but are not limited to, cellulose ethers, starch ethers, or combinations thereof, which may be present in the B component of the present invention in an amount ranging from 0 to 0.05 wt%, such as from 0 to 0.03 wt%.
The accelerator is an assistant for controlling the whole hardening speed of the material by accelerating the hydration speed of cement. Accelerators suitable for use in the present invention include, but are not limited to, lithium carbonate, lithium sulfate, calcium formate, or combinations thereof. Typically, the setting accelerator is present in an amount of 0 to 0.10 wt%, such as 0.04 to 0.09 wt%. In certain embodiments, component B of the present invention comprises a coagulant in an amount of 0.01 to 0.06 wt.%, such as 0.05 wt.%.
The retarder is an auxiliary agent for controlling the whole hardening speed of the material by inhibiting or delaying the hydration speed of cement. Retarders suitable for use in the present invention include, but are not limited to, citric acid, tartaric acid, sodium citrate, or mixtures thereof. Typically, the retarder is present in an amount of 0 to 0.20 wt%, such as 0.05 to 0.10 wt% or 0.08 to 0.15 wt%. In certain embodiments, the B component of the present invention comprises a retarder in an amount in the range of 0.08 to 0.15 wt%, preferably 0.09 to 0.12 wt%.
Thixotropic agents suitable for use in the present invention include, but are not limited to diutan, which may be present in the B component of the present invention in an amount ranging from 0 to 0.01 weight percent. For example 0-0.008 wt% or 0.001-0.01 wt%.
In some preferred embodiments, the B component of the present invention comprises: 35 to 37 weight percent of ordinary portland cement PO42.5, 50 to 55 weight percent of quartz sand with the grain size of 0.1 to 0.3mm, 8.0 to 10 weight percent of quartz sand with the grain size of 0.3 to 0.6mm, 0.01 to 0.015 weight percent of anti-settling agent, 0.13 to 0.25 weight percent of polycarboxylic acid high-efficiency water reducing agent and 0.10 to 0.18 weight percent of defoaming agent.
In some preferred embodiments, the B component of the present invention comprises: 35 to 37 weight percent of white portland cement PW52.5, 50 to 55 weight percent of quartz sand with the grain size of 0.1 to 0.3mm, 8.0 to 10 weight percent of quartz sand with the grain size of 0.3 to 0.6mm, 0.01 to 0.015 weight percent of anti-settling agent, 0.13 to 0.25 weight percent of polycarboxylic acid high-efficiency water reducing agent and 0.10 to 0.18 weight percent of defoaming agent.
In some preferred embodiments, the B component of the present invention comprises: 35-38 wt% of high belite sulphoaluminate cement, 50-55 wt% of quartz sand with the particle size of 0.1-0.3mm, 8.0-10 wt% of quartz sand with the particle size of 0.3-0.6mm, 0.01-0.015 wt% of anti-settling agent, 0.13-0.25 wt% of polycarboxylic acid high-efficiency water reducing agent, 0.05-0.08 wt% of coagulant, 0.08-0.10 wt% of retarder and 0.10-0.18 wt% of defoaming agent.
Normal-temperature self-crosslinking water-based epoxy resin modified cement-based mortar bi-component material
The normal-temperature self-crosslinking water-based epoxy resin modified cement-based mortar bi-component material contains the component A and the component B which are independently packaged. Generally, 10 to 25 parts by weight of the A component is used per 100 parts by weight of the B component, and preferably 15 to 20 parts by weight of the A component is used per 100 parts by weight of the B component. In some embodiments, 17 to 18 parts by weight of the A component is included per 100 parts by weight of the B component.
Cement mortar
The invention uses the normal-temperature self-crosslinking type waterborne epoxy resin modified cement-based mortar bi-component material to replace the traditional external crosslinking type epoxy resin-curing agent-cement three-component system, retains the basic characteristics of the ECC technology applied by external crosslinking, and avoids the defects of short high-temperature curing speed and application life, slow or even no curing at low temperature, obviously prolonged drying and curing time or even no curing in a high-humidity environment or underground or closed space and the like in the external crosslinking type application. Meanwhile, the production, transportation and storage of the material are greatly facilitated due to the packaging of the independent components, so that the product is more convenient to use and is more environment-friendly and economical.
Therefore, the invention also provides cement mortar which contains the normal-temperature self-crosslinking water-based epoxy resin emulsion, a defoaming agent, cement, sand, an anti-settling agent and a water reducing agent. The cement mortars of the present invention do not contain curing agents necessary for conventional epoxy resin applications.
The normal-temperature self-crosslinking water-based epoxy resin is a normal-temperature self-crosslinking water-based epoxy resin with the epoxy equivalent of 300-600, preferably 300-550, more preferably 400-550, preferably a bisphenol A-type epoxy resin with the epoxy equivalent of 300-600, preferably 300-550, more preferably 400-550. The content of the normal temperature self-crosslinking water-based epoxy resin is 2.0-5.5 wt%, preferably 2.5-4.5 wt%, more preferably 3.0-4.0 wt% based on the total weight of cement mortar. When the room-temperature self-crosslinking type aqueous epoxy resin is provided in the form of an emulsion, the solid content of the emulsion (i.e., the content of the room-temperature self-crosslinking type aqueous epoxy resin) may be 40 to 60 wt%, and the content of the emulsion is 5.0 to 9.0 wt%, preferably 6.0 to 7.0 wt%.
The defoamer can be one conventional in the art for use in cement, including but not limited to mineral oil based defoamers, non-mineral oil based defoamers, and combinations of one or more defoamers can also be used. The content of the defoaming agent is 0.10 to 1.0 wt%, preferably 0.10 to 0.50 wt%, more preferably 0.10 to 0.30 wt%, based on the total weight of the cement mortar.
The cement may be one or more of various cements commonly used in the art, including ordinary portland cement, white portland cement, and special cements. The special cement can be high belite sulphoaluminate cement and aluminate cement. The content of the cement is in the range of 20 to 40 wt%, preferably 25 to 35 wt%, more preferably 30 to 35 wt% based on the total weight of the cement mortar.
The sand may be any of a variety of sands commonly used in the art including, but not limited to, calcium sand, quartz sand, or combinations thereof. The content of sand may be in the range of 40-65 wt%, preferably 45-65 wt%, more preferably 50-60 wt%, based on the total weight of the cement mortar. The particle size of the sand is not particularly limited and may be determined according to the specific use of the mortar of the present invention. In certain embodiments, the invention uses sand having two particle size ranges, one particle size range between 0.1 and 0.3mm, which may be present in an amount of 35 to 55 wt%, preferably 40 to 50 wt%, more preferably 42 to 48 wt%; another particle size range is between 0.3 and 0.6mm, and its content may be 3.0 to 10 wt%, preferably 5.0 to 10 wt%.
The anti-settling agent may be any of various anti-settling agents known in the art for use in cement mortars, including but not limited to fumed silica and/or organically modified bentonite, attapulgite. In some embodiments, the thickening agent (especially low-viscosity cellulose ether) and diutan are compounded to be used as the anti-settling agent, so that the manufactured product has better flowing property and anti-settling effect than the existing product of the non-diutan anti-settling agent. In the present invention, the content of the anti-settling agent is in the range of 0.001 to 0.01 wt%, preferably 0.005 to 0.01 wt%, based on the total weight of the cement mortar.
The water reducing agent comprises but is not limited to polycarboxylic acid high-efficiency water reducing agent, naphthalene water reducing agent and melamine water reducing agent. Generally, the water reducing agent may be contained in the cement mortar of the present invention in an amount ranging from 0.10 to 0.30 wt%. In certain embodiments, the present invention utilizes a polycarboxylic acid superplasticizer in an amount ranging from 0.10 to 0.20 weight percent.
The cement mortar of the invention may further contain one or more of quartz powder or heavy calcium powder, an expanding agent, anti-cracking fibers, a thickening agent, a setting accelerator, a retarder and a thixotropic agent.
The content of quartz powder or triple superphosphate powder suitable for use in the present invention in the cement mortar of the present invention may be in the range of 0 to 18 wt%, for example 1.0 to 10 wt%, 2.0 to 10 wt%, or 8.0 to 18 wt%. The particle size is not particularly limited and can be determined according to the specific use of the mortar of the present invention.
The expanding agent suitable for use in the present invention includes, but is not limited to, calcium thioaluminate type expanding agents, calcium oxide type expanding agents or combinations thereof, and the content thereof in the cement mortar of the present invention may be in the range of 0 to 1.8 wt%. For example 0-0.5 wt%, 0-1.0 wt% or 1.0-1.8 wt%.
The anti-crack fiber suitable for the present invention includes, but is not limited to, one or more of glass fiber, polypropylene monofilament fiber and steel fiber, and the content thereof in the cement mortar of the present invention may be in the range of 0 to 0.95 wt%. For example 0-0.50 wt% or 0.20-0.90 wt%.
Thickeners suitable for use in the present invention include, but are not limited to, cellulose ethers, starch ethers, or combinations thereof, which may be present in the cement mortars of the present invention in an amount ranging from 0 to 0.045 wt%, for example 0 to 0.03 wt%.
Accelerators suitable for use in the present invention include, but are not limited to, lithium carbonate, lithium sulfate, calcium formate, or combinations thereof. Typically, the setting accelerator is present in an amount of 0 to 0.08 wt%, such as 0.02 to 0.06 wt%. In certain embodiments, the cement mortars of the invention contain an accelerator in an amount of 0.02 to 0.05 wt%.
Retarders suitable for use in the present invention include, but are not limited to, citric acid, tartaric acid, sodium citrate, or mixtures thereof. Typically, the retarder is present in an amount of 0 to 0.15 wt%, such as 0.05 to 0.10 wt% or 0.07 to 0.15 wt%. In certain embodiments, the cement mortars of the invention contain a retarder in an amount within the range of 0.07-0.15 wt%, preferably 0.07-0.12 wt%.
Thixotropic agents suitable for use in the present invention include, but are not limited to diutan, which may be present in the cement mortar of the present invention in an amount ranging from 0 to 0.009 wt%. For example 0-0.008 wt% or 0.001-0.009 wt%.
The cement mortar can be prepared by adopting the normal-temperature self-crosslinking water-based epoxy resin modified cement-based mortar bi-component material, preferably, 10-25 parts by weight of the component A is used per 100 parts by weight of the component B, and preferably, 15-20 parts by weight of the component A is used per 100 parts by weight of the component B. In some embodiments, 17 to 18 parts by weight of the A component is used per 100 parts by weight of the B component.
The cement mortar of the present invention can be obtained by simply mixing the A component and the B component. An appropriate amount of water may be added as necessary.
The mortar material of the invention has the following characteristics:
(1) has excellent mechanical strength, the 28-day compressive strength of the material can reach more than 60MPa, and the 28-day flexural strength of the material can reach more than 12 MPa.
(2) The material has good impact toughness and crack resistance, and the surface of a 28-day impact test (1kg/1000mm, 2mm thick test piece) has no crack and no peeling.
(3) Has the characteristic of quick hardening, has 24-hour strength and compressive strength of more than 25MPa, and is suitable for quick construction.
(4) The low-temperature environment strength is fast to develop, the compression strength of 24h and 3 days at 5 ℃ respectively reaches 8MPa and 20MPa, and the curing is carried out within 24h, so that the high-strength concrete is suitable for construction in winter and underground engineering.
(5) The volume is stable, the long-term drying shrinkage value is lower than 0.15%, the long-term soaking expansion value is lower than 0.05%, and cracking and shelling caused by dry-wet circulation can be effectively resisted.
(6) The water permeability is good, the water permeability for 2h and 24h is respectively below 0.1mL and 0.4mL (JG/T210-.
(7) The waterproof performance is excellent, the waterproof adhesive can be effectively and firmly bonded with a cement concrete base layer for a long time in a humid environment, and the defect that the waterproof performance of high polymer resins such as SBR, VAE, SA and the like is insufficient is overcome.
(8) Has high wear resistance with a wear resistance value lower than 400mm3(JC/T985-2017 method) is suitable for the application with high wear-resisting requirements.
(9) Can resist freeze-thaw cycle, and is suitable for long-term service under extreme low temperature environment (such as environment at-35 deg.C).
(10) Has the A-level fire-proof characteristic and is suitable for occasions with high fire-proof grade requirements.
(11) Has the characteristic of environmental safety, and does not release toxic and harmful substances in the construction and use processes.
The present invention will be illustrated below by way of specific examples. It should be understood that these examples are illustrative only and are not intended to limit the scope of the present invention. Some of the materials used in the examples were:
other materials used in the examples are commercially available materials conventional in the art.
COMPARATIVE EXAMPLE 1 (ordinary silicate cement mortar)
Weighing and mixing 42.5 parts of ordinary portland cement PO, 0.1-0.3mm of quartz sand, 0.3-0.6mm of quartz sand, an anti-settling agent, a polycarboxylic acid high-efficiency water reducing agent and a defoaming agent according to the formula shown in the following table 1 to obtain a powdery solid material B component; 100 parts by weight of the component B and 14 parts by weight of water are mixed by a dry mixer to prepare the mortar.
TABLE 1
| Composition (I) | Weight percent of |
| Liquid fraction | 14.0 |
| Water (W) | 14.0 |
| Powdered solid fraction | 100.0 |
| Ordinary portland cementPO42.5 | 41.5 |
| Quartz sand (0.1-0.3mm) | 49.69 |
| Quartz sand (0.3-0.6mm) | 8.5 |
| Anti-settling agent | 0.01 |
| Polycarboxylic acid high-efficiency water reducing agent | 0.15 |
| Defoaming agent | 0.15 |
Example 1 (aqueous epoxy resin modified Portland Cement mortar)
Weighing epoxy resin emulsion (EEW 550, about 40 wt% solid content), defoaming agent and water according to the formula shown in the following table 2, and mixing to obtain a liquid A component; continuously weighing ordinary portland cement PO42.5, quartz sand (0.1-0.3mm), quartz sand (0.3-0.6mm), anti-settling agent, polycarboxylic acid high-efficiency water reducing agent and defoaming agent, and mixing to obtain powdery solid material component B; 17.65 parts by weight of the component A and 100 parts by weight of the component B are mixed by a dry mixer to prepare the mortar.
TABLE 2
Test example 1
Comparative example 1 and example 1 were tested according to the test method specified in the JC/T985-2017 standard, in which test pieces molded for 24 hours in the water immersion treatment tensile bond strength project were subjected to a water immersion treatment for 28 days (23 ℃), and the barrier properties were tested according to the method specified in the JG/T210-2018 method standard. The results are shown in Table 3.
TABLE 3
COMPARATIVE EXAMPLE 2 (white Portland cement mortar)
Weighing white portland cement PW52.5, quartz sand (0.1-0.3mm), quartz sand (0.3-0.6mm), an anti-settling agent, a polycarboxylic acid high-efficiency water reducing agent and a defoaming agent according to the formula shown in the following table 4, and mixing to obtain a powdery solid material component B; 100 parts by weight of the component B and 14 parts by weight of water are mixed by a dry mixer to prepare the mortar.
TABLE 4
| Composition (I) | Weight percent of |
| Liquid fraction | 14.0 |
| Water (W) | 14.0 |
| Powdered solid fraction | 100.0 |
| White portland cement PW52.5 | 41.5 |
| Quartz sand (0.1-0.3mm) | 49.69 |
| Quartz sand (0.3-0.6mm) | 8.5 |
| Anti-settling agent | 0.01 |
| Polycarboxylic acid high-efficiency water reducing agent | 0.15 |
| Defoaming agent | 0.15 |
COMPARATIVE EXAMPLE 3 (conventional waterborne epoxy resin modified white silicate cement mortar)
Weighing epoxy resin emulsion (EEW 190, Ancarez AR 468) as a liquid component A, a curing agent, a defoaming agent and water according to the formula shown in the following table 5, and mixing to obtain a liquid component B; continuously weighing white portland cement, quartz sand, an anti-settling agent, a polycarboxylic acid high-efficiency water reducing agent and a defoaming agent, and mixing to obtain a powdery solid material; 6.0 parts by weight of the A component, 13.1 parts by weight of the B component and 100 parts by weight of the powdery solid material were mixed and mixed by a dry mixer to prepare mortar.
TABLE 5
| Composition (I) | Weight percent of |
| Liquid fraction (A component) | 6.0 |
| Epoxy resin emulsion (solid EEW 190) | 6.0 |
| Liquid fraction (B component) | 13.1 |
| Curing agent | 5.0 |
| Defoaming agent | 0.1 |
| Water (W) | 8.0 |
| Powdery solid component | 100.0 |
| White portland cement PW52.5 | 36.5 |
| Quartz sand (0.1-0.3mm) | 53.7 |
| Quartz sand (0.3-0.6mm) | 9.44 |
| Anti-settling agent | 0.01 |
| Polycarboxylic acid high-efficiency water reducing agent | 0.20 |
| Defoaming agent | 0.15 |
Example 2 (Water-borne epoxy resin modified white silicate cement mortar)
Weighing epoxy resin emulsion (EEW 550, about 40 wt% solid content), defoaming agent and water according to the formula shown in Table 6 below, and mixing to obtain a liquid A component; continuously weighing white portland cement PW52.5, quartz sand (0.1-0.3mm), quartz sand (0.3-0.6mm), anti-settling agent, polycarboxylic acid high-efficiency water reducing agent and defoaming agent, and mixing to obtain a powdery solid material component B; 17.65 parts by weight of the component A and 100 parts by weight of the component B are mixed by a dry mixer to prepare the mortar.
TABLE 6
Test example 2
Comparative example 2 and example 2 were tested according to the test method specified in the JC/T985-2017 standard, in which test pieces molded for 24 hours in the water immersion treatment tensile bond strength project were subjected to water immersion treatment for 28 days (23 ℃), the impermeability was tested according to the method specified in the JG/T210-2018 standard, and the freeze-thaw resistance was tested according to the method specified in the JGJ/T70-2009 standard for 25 freeze-thaw cycles. The results are shown in Table 7.
TABLE 7
COMPARATIVE EXAMPLE 4 (Gaoberit sulphoaluminate cement mortar)
Weighing high belite sulphoaluminate cement, quartz sand (0.1-0.3mm), quartz sand (0.3-0.6mm), an anti-settling agent, a polycarboxylic acid high-efficiency water reducing agent, a coagulant, a retarder and a defoaming agent according to the formula shown in the following table 8, and mixing to obtain a powdery solid material component B; 100 parts by weight of the component B and 14 parts by weight of water are mixed by a dry mixer to prepare the mortar.
TABLE 8
| Composition (I) | Weight percent of |
| Liquid fraction | 14.0 |
| Water (W) | 14.0 |
| Powdered solid fraction | 100.0 |
| High belite sulphoaluminate cement | 36.0 |
| Quartz sand (0.1-0.3mm) | 43.7 |
| Quartz sand (0.3-0.6mm) | 19.79 |
| Anti-settling agent | 0.01 |
| Polycarboxylic acid high-efficiency water reducing agent | 0.20 |
| Setting accelerator | 0.05 |
| Retarder | 0.10 |
| Defoaming agent | 0.15 |
Example 3 (waterborne epoxy resin modified high belite sulphoaluminate cement mortar)
Weighing epoxy resin emulsion (EEW 550, about 40 wt% solid content), defoaming agent and water according to the formula shown in Table 9 below, and mixing to obtain a liquid A component; continuously weighing high belite sulphoaluminate cement, quartz sand (0.1-0.3mm), quartz sand (0.3-0.6mm), anti-settling agent, polycarboxylic acid high-efficiency water reducing agent, coagulant, retarder and defoaming agent, and mixing to obtain a powdery solid material component B; 18.0 parts by weight of the component A and 100 parts by weight of the component B are mixed by a dry mixer to prepare the mortar.
TABLE 9
Test example 3
Comparative example 3 and example 3 were tested according to the test method specified in the JC/T985-2017 standard, in which test pieces molded for 24 hours in the water immersion treatment tensile bond strength project were subjected to a water immersion treatment for 28 days (23 ℃), and the barrier properties were tested according to the method specified in the JG/T210-2018 standard. The results are shown in Table 10.
Watch 10
Example 4 (aqueous epoxy resin modified Portland Cement mortar)
Weighing epoxy resin emulsion (EEW 300, solid content of about 58 wt%), defoamer and water according to the formulation shown in table 11 below, and mixing to obtain a liquid a component; continuously weighing ordinary portland cement PO42.5, quartz sand (0.1-0.3mm), quartz sand (0.3-0.6mm), anti-settling agent, polycarboxylic acid high-efficiency water reducing agent and defoaming agent, and mixing to obtain powdery solid material component B; 17.65 parts by weight of the component A and 100 parts by weight of the component B are mixed by a dry mixer to prepare the mortar.
TABLE 11
| Composition (I) | Weight percent of |
| Composition of liquid fraction | 17.65 |
| Epoxy resin emulsion (solid EEW 300) | 7.06 |
| Defoaming agent | 0.12 |
| Water (W) | 10.47 |
| Powdery solid component | 100.0 |
| Ordinary portland cement PO42.5 | 36.5 |
| Quartz sand (0.1-0.3mm) | 53.7 |
| Quartz sand (0.3-0.6mm) | 9.44 |
| Anti-settling agent | 0.01 |
| Polycarboxylic acid high-efficiency water reducing agent | 0.20 |
| Defoaming agent | 0.15 |
Example 5 (aqueous epoxy resin modified Portland Cement mortar)
Weighing epoxy resin emulsion (EEW 400, 50 wt% solid content), defoaming agent and water according to the formulation shown in table 12 below, and mixing to obtain a liquid a component; continuously weighing ordinary portland cement PO42.5, quartz sand (0.1-0.3mm), quartz sand (0.3-0.6mm), anti-settling agent, polycarboxylic acid high-efficiency water reducing agent and defoaming agent, and mixing to obtain powdery solid material component B; 17.65 parts by weight of the component A and 100 parts by weight of the component B are mixed by a dry mixer to prepare the mortar.
TABLE 12
| Composition (I) | Weight percent of |
| Liquid fraction | 17.65 |
| Epoxy resin emulsion (solid EEW 400) | 7.06 |
| Defoaming agent | 0.12 |
| Water (W) | 10.47 |
| Powdered solid fraction | 100.0 |
| Ordinary portland cement PO42.5 | 36.5 |
| Quartz sand (0.1-0.3mm) | 53.7 |
| Quartz sand (0.3-0.6mm) | 9.44 |
| Anti-settling agent | 0.01 |
| Polycarboxylic acid high-efficiency water reducing agent | 0.20 |
| Defoaming agent | 0.15 |
Test example 4
Examples 4 and 5 were tested according to the test method specified in the JC/T985-2017 standard, in which the molded 24-h test pieces in the Water immersion treatment tensile bond Strength section were subjected to a water immersion treatment for 28 days (23 ℃). The results are shown in Table 13.
Watch 13
Claims (10)
1. The normal-temperature self-crosslinking water-based epoxy resin modified cement-based mortar bi-component material is characterized by comprising the following components in parts by weight:
the component A comprises: the self-crosslinking type epoxy resin composition comprises 12-30 wt%, preferably 15-25 wt% of normal-temperature self-crosslinking type water-based epoxy resin, optional 0.10-1.0 wt% of defoaming agent and the balance of water, wherein the weight of the component A is calculated by the total weight of the component A; wherein the normal-temperature self-crosslinking water-based epoxy resin is a normal-temperature self-crosslinking water-based epoxy resin with the epoxy equivalent weight of 300-600, preferably 300-550 and more preferably 400-550, and preferably is bisphenol A epoxy resin; and
and B component: it contains cement, sand, anti-settling agent, water reducing agent and defoaming agent;
wherein the A component and the B component are packaged independently, and the two-component material does not contain a curing agent.
2. The room-temperature self-crosslinking water-based epoxy resin modified cement-based mortar two-component material as claimed in claim 1, wherein the room-temperature self-crosslinking water-based epoxy resin is provided in the form of an emulsion, and the component A comprises a room-temperature self-crosslinking water-based epoxy resin emulsion, water and optionally an antifoaming agent, wherein the content of the room-temperature self-crosslinking water-based epoxy resin emulsion is 30-50 wt%, preferably 35-45 wt%, based on the total weight of the component A.
3. The normal-temperature self-crosslinking water-based epoxy resin modified cement-based mortar two-component material as claimed in claim 2, wherein the component A comprises:
35-45 wt% of the normal-temperature self-crosslinking water-based epoxy resin emulsion, 0.50-0.80 wt% of a defoaming agent and the balance of water, wherein the normal-temperature self-crosslinking water-based epoxy resin is bisphenol A epoxy resin emulsion with the epoxy equivalent of 400-550; or
35-45 wt% of the normal-temperature self-crosslinking water-based epoxy resin emulsion, 0.55-0.80 wt% of a defoaming agent and the balance of water, wherein the normal-temperature self-crosslinking water-based epoxy resin is bisphenol A epoxy resin emulsion with the epoxy equivalent of 550; or
35-45 wt% of the normal-temperature self-crosslinking water-based epoxy resin emulsion, 0.55-0.80 wt% of a defoaming agent and the balance of water, wherein the normal-temperature self-crosslinking water-based epoxy resin is bisphenol A epoxy resin emulsion with the epoxy equivalent of 300; or
35-45 wt% of the normal-temperature self-crosslinking water-based epoxy resin emulsion, 0.55-0.80 wt% of a defoaming agent and the balance of water, wherein the normal-temperature self-crosslinking water-based epoxy resin is bisphenol A epoxy resin emulsion with the epoxy equivalent of 400.
4. The normal-temperature self-crosslinking water-based epoxy resin modified cement-based mortar two-component material as claimed in any one of claims 1 to 3, wherein the component B comprises, based on the total weight of the component B:
20-45 wt%, preferably 30-40 wt%, more preferably 35-40 wt% cement,
45-70 wt.%, preferably 55-70 wt.%, more preferably 58-65 wt.% of sand,
0.005-0.05 wt.%, preferably 0.005-0.02 wt.%, of an anti-settling agent,
0.10-0.30 wt.%, preferably 0.13-0.25 wt.% of a water reducing agent, and
0.05-0.30 wt%, preferably 0.08-0.25 wt%, more preferably 0.12-0.18 wt% of a defoaming agent.
5. The normal-temperature self-crosslinking water-based epoxy resin modified cement-based mortar bi-component material as claimed in claim 1, wherein:
the defoamer is selected from mineral oil type defoamers, non-mineral oil type defoamers or a combination;
the cement is selected from one or more of ordinary portland cement, white portland cement, high belite sulphoaluminate cement and aluminate cement;
the sand and stone is calcium sand, quartz sand or a combination thereof;
the anti-settling agent is selected from one or more of fumed silica, organic modified bentonite and attapulgite;
the water reducing agent is selected from one or more of polycarboxylic acid high-efficiency water reducing agent, naphthalene water reducing agent and melamine water reducing agent.
6. The normal-temperature self-crosslinking water-based epoxy resin modified cement-based mortar bi-component material as claimed in claim 1, wherein:
the component A also contains pigment or color paste; and/or
The component B also contains one or more of 0-20 wt% of quartz powder or heavy calcium powder, 0-2.0 wt% of expanding agent, 0-1.0 wt% of anti-cracking fiber, 0-0.05 wt% of thickening agent, 0-0.10 wt% of coagulant, 0-0.20 wt% of retarder and 0-0.01 wt% of thixotropic agent;
preferably, the expanding agent is selected from calcium sulphoaluminate expanding agents, calcium oxide expanding agents or a combination thereof, the anti-crack fibers are selected from one or more of glass fibers, polypropylene monofilament fibers and steel fibers, the thickening agent is selected from cellulose ether, starch ether or a combination thereof, the accelerating agent is selected from lithium carbonate, lithium sulfate, calcium formate or a combination thereof, the retarder is selected from citric acid, tartaric acid, sodium citrate or a combination thereof, and the thixotropic agent is diutan.
7. The room-temperature self-crosslinking water-based epoxy resin modified cement-based mortar two-component material as claimed in any one of claims 1 to 6, wherein the component B comprises, based on the total weight of the component B:
35 to 37 weight percent of ordinary portland cement PO42.5, 50 to 55 weight percent of quartz sand with the grain size of 0.1 to 0.3mm, 8.0 to 10 weight percent of quartz sand with the grain size of 0.3 to 0.6mm, 0.01 to 0.015 weight percent of anti-settling agent, 0.13 to 0.25 weight percent of polycarboxylic acid high-efficiency water reducing agent and 0.10 to 0.18 weight percent of defoaming agent; or
35 to 37 weight percent of white portland cement PW52.5, 50 to 55 weight percent of quartz sand with the particle size of 0.1 to 0.3mm, 8.0 to 10 weight percent of quartz sand with the particle size of 0.3 to 0.6mm, 0.01 to 0.015 weight percent of anti-settling agent, 0.13 to 0.25 weight percent of polycarboxylic acid high-efficiency water reducing agent and 0.10 to 0.18 weight percent of defoaming agent; or
35-38 wt% of high belite sulphoaluminate cement, 50-55 wt% of quartz sand with the particle size of 0.1-0.3mm, 8.0-10 wt% of quartz sand with the particle size of 0.3-0.6mm, 0.01-0.015 wt% of anti-settling agent, 0.13-0.25 wt% of polycarboxylic acid high efficiency water reducing agent, 0.05-0.08 wt% of coagulant, 0.08-0.10 wt% of retarder and 0.10-0.18 wt% of defoaming agent.
8. The normal-temperature self-crosslinking water-based epoxy resin modified cement-based mortar bi-component material as claimed in any one of claims 1 to 7, wherein in the bi-component material, the weight ratio of the component A to the component B is 10-25: 100, preferably 15-20: 100, more preferably 17 to 18: 100.
9. an ambient-temperature self-crosslinking water-based epoxy resin modified cement mortar, which is characterized by comprising 5.0-9.0 wt%, preferably 6.0-7.0 wt% of ambient-temperature self-crosslinking water-based epoxy resin emulsion, 0.10-1.0 wt%, preferably 0.10-0.50 wt%, more preferably 0.10-0.30 wt% of defoaming agent, 20-40 wt%, preferably 25-35 wt%, more preferably 30-35 wt% of cement, 40-65 wt%, preferably 45-65 wt%, more preferably 50-60 wt% of sand, 0.001-0.01 wt%, preferably 0.005-0.01 wt% of anti-settling agent, 0.10-0.30 wt%, preferably 0.10-0.20 wt% of water reducing agent and the balance of water, based on the total weight of the cement mortar; wherein the normal-temperature self-crosslinking water-based epoxy resin has an epoxy equivalent of 300-600, preferably 300-550, and more preferably 400-550, and preferably bisphenol A epoxy resin, and the cement mortar does not contain a curing agent.
10. An ambient-temperature self-crosslinking water-based epoxy resin modified cement mortar, which is characterized by comprising the ambient-temperature self-crosslinking water-based epoxy resin modified cement-based mortar two-component material as claimed in any one of claims 1 to 8, or prepared by mixing the component A and the component B of the ambient-temperature self-crosslinking water-based epoxy resin modified cement-based mortar two-component material as claimed in any one of claims 1 to 8 and optionally adding a proper amount of water.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0786439A1 (en) * | 1996-01-27 | 1997-07-30 | Colfirmit Rajasil GmbH | Polymer-modified ready-to-use cement mortar |
| CN102531503A (en) * | 2011-12-23 | 2012-07-04 | 广东工业大学 | High-viscosity cement mortar and manufacturing method thereof |
| CN108529994A (en) * | 2018-05-02 | 2018-09-14 | 上海博尔泰工业产品设计有限公司 | A kind of unitary system special cement gravity flow self-leveling floor material |
| CN109809732A (en) * | 2019-01-08 | 2019-05-28 | 中海油常州涂料化工研究院有限公司 | A kind of silicate grout polyepoxy aqueous epoxy emulsion and preparation method thereof |
| CN112341094A (en) * | 2020-11-19 | 2021-02-09 | 广西帝品建材有限公司 | Water-based nano resin mortar |
-
2021
- 2021-11-09 CN CN202111320588.5A patent/CN113896481B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0786439A1 (en) * | 1996-01-27 | 1997-07-30 | Colfirmit Rajasil GmbH | Polymer-modified ready-to-use cement mortar |
| CN102531503A (en) * | 2011-12-23 | 2012-07-04 | 广东工业大学 | High-viscosity cement mortar and manufacturing method thereof |
| CN108529994A (en) * | 2018-05-02 | 2018-09-14 | 上海博尔泰工业产品设计有限公司 | A kind of unitary system special cement gravity flow self-leveling floor material |
| CN109809732A (en) * | 2019-01-08 | 2019-05-28 | 中海油常州涂料化工研究院有限公司 | A kind of silicate grout polyepoxy aqueous epoxy emulsion and preparation method thereof |
| CN112341094A (en) * | 2020-11-19 | 2021-02-09 | 广西帝品建材有限公司 | Water-based nano resin mortar |
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| CN113896481B (en) | 2022-12-13 |
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