CN108947430B - Slow-setting and quick-hardening special functional waterproof mortar and preparation method thereof - Google Patents
Slow-setting and quick-hardening special functional waterproof mortar and preparation method thereof Download PDFInfo
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- CN108947430B CN108947430B CN201811038317.9A CN201811038317A CN108947430B CN 108947430 B CN108947430 B CN 108947430B CN 201811038317 A CN201811038317 A CN 201811038317A CN 108947430 B CN108947430 B CN 108947430B
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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
- C04B28/10—Lime cements or magnesium oxide 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00637—Uses not provided for elsewhere in C04B2111/00 as glue or binder for uniting building or structural materials
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
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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
Abstract
The invention provides a slow-setting and quick-hardening special functional waterproof mortar, which comprises the following raw material components: portland cement, a water reducing agent, a defoaming agent, fly ash, ash calcium and quartz sand. The mortar also comprises the following raw material components: the composite high-alumina cement, hydrophobic modified cellulose ether, hydrophobic rubber powder, polyethylene oxide and a powder wetting agent. The invention integrates excellent waterproof performance and high-strength adhesive performance, and the slurry is slowly coagulated at the initial stage of mixing and quickly increases the strength after being paved on a test piece; greatly shortens the construction period, reduces the construction cost, saves energy, consumes less energy and is green and environment-friendly.
Description
Technical Field
The invention relates to waterproof mortar, in particular to retarding and quick-hardening special functional waterproof mortar and a preparation method thereof, and belongs to the field of waterproof mortar.
Background
In recent years, the problem of falling off of building walls is more and more serious, and news that cars are damaged by falling off walls, heat preservation plates and the like and pedestrians are injured by falling off walls and heat preservation plates is more and more rare. The wall surface is exposed to the sun and rain all the year round, and the dry and wet change and the temperature change cause the stress concentration of the wall surface bonding layer and the occurrence of hollowing, which is one of the direct reasons for the falling of the wall surface. In addition, along with the settlement of buildings, cracks appear on the wall surface, rainwater enters the wall body along the cracks, the bonding between the bonding layer and the heat insulation layer or the bonding between the bonding layer and the base layer of the wall body is damaged, the wall surface is caused to fall off, and the problem of outer wall leakage can also appear. The fundamental reason is that the bonding strength of the wall bonding material is not enough, so that the bonding between the external wall insulation board or the ceramic tile and the surface layer or the wall base layer is not firm.
With conventional waterproofing materials, there are more or less problems associated with the use of waterproofing adhesives for exterior walls. The JS waterproof paint has good flexibility and excellent deformation resistance, but the bonding strength is lower, and the wall surface falling risk is larger; on the contrary, although the waterproof slurry and the waterproof mortar have high bonding strength, the bonding effect on the facing brick is poor, and the specific rigidity determines the defect that the facing brick cannot resist deformation; the tile adhesive has a good effect on the adhesion of the facing tile, but has high water absorption rate and poor impermeability. Therefore, the building outer wall not only meets the waterproof performance requirement, but also achieves a certain bonding effect, and multiple constructions must be carried out by using the materials. The construction material is greatly consumed, a large amount of manpower and material resources are needed, the time is long, and the construction cost is high.
CN 201210353170.9A corrosion-resistant polymer waterproof mortar, which provides a corrosion-resistant polymer waterproof mortar, comprising the following components in parts by weight: 40-50 parts of Portland cement, 2-3 parts of polymethyl acrylate latex powder, 2-3 parts of ethylene-vinyl acetate latex powder, 1-2 parts of vinyl chloride-vinylidene chloride copolymer latex powder, 1-2 parts of polyacrylate latex powder, 3-5 parts of polypropylene fiber, 3-5 parts of cellulose ether, 3-7 parts of inorganic fiber, 6-12 parts of plant fiber, 3-5 parts of cellulose sulfate, 2-4 parts of cellulose phosphate, 1-2 parts of phenyl o-hydroxybenzoate and 1-3 parts of polyimide particles, 5-8 parts of quartz sand, 10-15 parts of gypsum, 5-9 parts of fly ash, 4-7 parts of bentonite, 3-6 parts of molybdenum trioxide, 2-5 parts of silicon oxide, 1-2 parts of citric acid, 5-8 parts of calcium nitrate, 5-8 parts of kieselguhr, 2-8 parts of polyvinyl alcohol, 3-6 parts of dried alum, 1-2 parts of surfactant and 20-30 parts of water.
CN 201610103516.8A nanometer attapulgite modified waterproof mortar discloses a nanometer attapulgite modified waterproof mortar, which is prepared by mixing the following components: ordinary portland cement, quartz sand, fly ash, cellulose ether, dispersible latex powder, a water reducing agent and nano-attapulgite. The nano-attapulgite modified waterproof mortar disclosed by the invention adopts the ordinary portland cement composite fly ash, improves the strength of the mortar, is additionally added with additives such as cellulose ether, dispersible latex powder, a water reducing agent and the like, has good mortar construction performance and good mortar flexibility, is added with the nano-attapulgite, further improves the bonding force among cement mortars, and well inhibits the generation of early microcracks, so that the impermeability of the polymer waterproof mortar is improved, and the waterproof performance and the stability of the mortar are greatly improved.
CN 201610117347.3A green environmental protection polymer waterproof mortar discloses a green environmental protection polymer waterproof mortar, which is prepared by mixing the following components: ordinary portland cement, iron tailings, fly ash, steel slag, emulsion, a water reducing agent, cellulose ether, a defoaming agent and water. The green environment-friendly polymer waterproof mortar disclosed by the invention adopts high-quality acrylic emulsion, the mortar glue film is compact and stable, and cellulose ether, a water reducing agent and the like are added, so that the mortar construction property is greatly improved, and the mortar has good flexibility. The addition of the defoaming agent enables bubbles in the slurry to be broken, so that the aperture gap in the slurry is reduced, the compactness of the mortar is improved, and the strength of the mortar is improved. The aggregate in the formula abandons the traditional quartz sand, and the industrial waste, the iron tailings, the steel slag and the fly ash are used as the aggregate, so that the waste is recycled, the mechanical property of the mortar is superior to that of the waterproof mortar taking the traditional quartz sand as the aggregate by reasonably adjusting the proportion of the iron tailings, the steel slag and the fly ash, and the mortar has better stability.
CN 201510959514.4A quick-setting energy-saving light waterproof mortar for external walls, which provides a quick-setting energy-saving light waterproof mortar for external walls, and the waterproof mortar comprises liquid materials and powder materials. The weight ratio of the liquid material to the powder material is as follows: powder = 1: 2.77-1: 3.33. the liquid material comprises the following raw material components: butylbenzene emulsion, cellulose ether, water, defoaming agent and preservative. The powder material comprises the following raw material components: portland cement, hollow glass beads, fly ash, quartz sand, a cement expanding agent, a water reducing agent, a dispersing agent, a coagulant and a thixotropic agent. The waterproof mortar has short setting time, the initial setting time is 45-70 min, and the final setting time is 1.50-2.50 h; the waterproof mortar has strong anti-permeability capability and good compressive and flexural strength.
The bonding strength of the bonding material in actual use depends on the properties of the material and is influenced by site construction. The same bonding material is used for immediately bonding the ceramic tile or the heat-insulating board after being glued, so that the bonding strength obtained by bonding the ceramic tile or the heat-insulating board after being glued for a period of time is greater than the bonding strength obtained by bonding the ceramic tile or the heat-insulating board after being glued for a period of time, namely, the bonding strength can be higher within the airing time. However, the worker often cannot paste the ceramic tiles or the heat-insulating plates in the airing time after gluing on the spot for convenient construction, so that the performance of the bonding material is not fully exerted, and the condition of low bonding strength occurs.
In summary, the prior art has the following technical problems: (1) the mortar in the prior art cannot simultaneously meet two performances of water resistance and bonding; (2) the mortar in the prior art cannot meet the requirements of two technical indexes of slow setting and quick hardening at the same time.
Disclosure of Invention
The invention provides a slow-setting and quick-hardening special functional waterproof mortar and a preparation method thereof, and aims to realize the following purposes: meanwhile, the waterproof adhesive has waterproof and bonding functions and can replace waterproof materials and bonding materials; the defects that the retardation and the rapid hardening can not be simultaneously satisfied in the prior art are overcome; the construction period is shortened, and the construction cost is reduced.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the slow-setting and quick-hardening special functional waterproof mortar comprises the following raw material components in parts by weight:
30-45 parts of Portland cement, 5-20 parts of composite high-alumina cement, 0.1-0.5 part of hydrophobically modified cellulose ether, 2-5 parts of hydrophobic rubber powder, 0.2-0.5 part of polyoxyethylene, 0.2-0.5 part of powder wetting agent, 0.05-0.3 part of water reducing agent, 0.2-0.6 part of defoaming agent, 2-10 parts of fly ash, 2-10 parts of ash calcium and 30-50 parts of quartz sand.
The Portland cement: the strength grade is above 42.5;
the composite high-alumina cement: is different from the traditional high alumina cement, is specially treated and comes from Kannuos (China) silicate technology Co., Ltd, the model PP 8203;
the hydrophobically modified cellulose ether is a hydroxypropyl methyl cellulose ether or a hydroxyethyl methyl cellulose ether or a methyl cellulose ether;
the hydrophobic rubber powder is redispersible latex powder with hydrophobic function, and is acrylic rubber powder or ethylene vinyl acetate rubber powder;
the powder wetting agent is a surfactant such as polyethylene glycol esters, organic metal esters or alkylene oxide copolymers.
The water reducing agent is a naphthalene water reducing agent, a polycarboxylic acid water reducing agent, a melamine water reducing agent, or the like, but is not limited thereto.
The powder defoaming agent comprises one or a combination of more of organic silicon, polyether and the like.
The quartz sand is graded in a range of 50 meshes to 120 meshes.
The fly ash is one or a combination of more of first-level fly ash, second-level fly ash and third-level fly ash.
The ash calcium refers to ash calcium powder with the fineness of 325 meshes or above.
The production process of the slow setting and rapid hardening special functional waterproof mortar is a pure physical mixing process, and various powder raw materials are uniformly mixed, so that the industrial production process is simple, and the production process can be realized according to the production mode of common dry powder mortar.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects:
(1) the mortar of the invention integrates excellent waterproof performance and high-strength adhesive performance, after the mortar is slowly coagulated at the initial stage of mixing and is paved on a test piece, the strength can be quickly increased, the strength of the mortar of the invention can meet the index requirement of the relevant standard for 28 days after 7 days, the mortar can replace waterproof materials and adhesive materials, namely the slowly-coagulated, quickly-hardened special function waterproof mortar, and the target requirements of waterproof and adhesive bonding can be met through one-time construction. The construction period is greatly shortened, the construction cost is reduced, energy is saved, the consumption is low, and the environment is protected.
(2) The retarding and quick-hardening special functional waterproof mortar has the advantages in performance:
1) delayed coagulation and rapid hardening characteristics
The common mortar with the retarding effect generally has lower strength, and the mortar with higher strength generally does not have the retarding effect, so that the operable time of the mixture is very short. According to the invention, through a specific component formula, the mixture has a retarding effect at the initial stage of mixing, and the operable time of the mixture is prolonged; after the operable time is over, namely after the ceramic tiles or the heat insulation boards are paved, the slurry can be quickly hardened to strength.
The delayed coagulation and rapid hardening waterproof mortar with special functions can increase the operable time of the mortar and rapidly obtain higher strength at the same time, and makes up the defects of mortar products in use. The technology for simultaneously improving the two contradictory characteristics of slow setting and rapid hardening is difficult to realize by the prior art.
2) Excellent resistance to deformation
a. Higher transverse deformation
The transverse deformation indexes of the polymer cement waterproof mortar JC/T984 and the polymer cement waterproof slurry JC/T2090 and 2011 are respectively 1.0mm and 2.0mm, and the transverse deformation of the mortar disclosed by the invention can reach 10mm and is far greater than the transverse deformation capability of common waterproof mortar and tile adhesives.
b. Higher compression resistance and rupture resistance
The rapid hardening performance of the mortar enables the 7d compression resistance and bending resistance performance indexes to meet the I-type requirement in JC/T2090 plus 2011 of polymer cement waterproof slurry, the performance is continuously improved in the later maintenance process, and the 28d compression resistance and bending resistance performance indexes reach the II-type index requirement in JC/T984 plus 2011 of polymer cement waterproof slurry. This is far superior to the requirement of DB35/516-2005 in Fujian landmark of high molecular beneficial daub.
c. Higher ability to bridge cracks
The mortar has the bridging crack capacity index of more than 1.00mm, and is obviously higher than the requirement of waterproof coating film used under a ceramic tile bonding layer JC/T2415 and 2017.
The mortar has certain flexibility and higher compression and fracture resistance, and can resist deformation caused by various stresses without damaging a coating.
3) Excellent water-proof performance
a. Extremely low water absorption
We detect that the water absorption of the tile adhesive on the market is generally more than 7.0 percent, and the water absorption of the mortar disclosed by the invention is lower than 3.0 percent, is far lower than that of the common tile adhesive, and can meet JC/T984-sand 2011 of Polymer Cement waterproof mortar.
b. Higher anti-permeability capability
The 7-day coating impermeability of the mortar is higher than 0.8MPa, and is superior to the index requirements in JC/T984-sand 2011, JC/T2090-sand 2011 and the I-type requirement in DB 35/516-sand 2005 of Fujian landmarks of polymer beneficial mortar in professional waterproof documents.
The extremely low water absorption rate and the high anti-permeability capability are the embodiment of the excellent waterproof performance of the mortar, meet the standard requirement of the waterproof mortar and make up the defect that a single bonding material is not waterproof.
4) Excellent adhesive strength
The 7d drawing bonding strength of the mortar can meet the index requirement of 28d specified in JC/T984-2011 of Polymer Cement waterproof mortar, and the bonding strength after various treatments can not only meet the standard requirement of the waterproof mortar, but also be greatly superior to the standard requirement of the existing professional bonding material tile adhesive. Particularly, after the air-drying time is increased to 40min, the bonding strength is more than 1.5MPa, which not only improves the bonding performance, but also greatly improves the construction time of the mortar.
Detailed Description
Example 1
The slow-setting and quick-hardening special functional waterproof mortar comprises the following raw material components in parts by weight:
40 parts of Portland cement, 10 parts of composite high-alumina cement, 0.15 part of hydrophobic modified cellulose ether, 2 parts of hydrophobic rubber powder, 0.5 part of polyoxyethylene, 0.5 part of powder wetting agent, 0.1 part of water reducing agent, 0.6 part of defoaming agent, 2 parts of fly ash, 10 parts of ash calcium and 40 parts of quartz sand.
The Portland cement: intensity rating of 42.5;
the composite high-alumina cement: from Kainus (China) silicate technology, Inc., model PP 8203;
the hydrophobically modified cellulose ether: is 7.5 million HPMC;
the hydrophobic rubber powder comprises the following components: is VAE hydrophobic rubber powder;
the powder wetting agent comprises: is a polyethylene glycol wetting agent;
the water reducing agent is as follows: is a polycarboxylic acid water reducing agent;
the defoaming agent comprises the following components: is an organic silicon defoamer;
the fly ash: is second-grade fly ash;
the lime calcium: the fineness is 400 meshes;
the quartz sand: the fineness is 50 meshes to 120 meshes.
The production process of the delayed coagulation and rapid hardening special functional waterproof mortar is a pure physical mixing process, and various powder raw materials are uniformly mixed, so that the industrialized production process is simple, and the production process can be realized according to the production mode of common dry powder mortar.
Example 2
The slow-setting and quick-hardening special functional waterproof mortar comprises the following raw material components in parts by weight:
45 parts of Portland cement, 5 parts of composite high-alumina cement, 0.15 part of hydrophobic modified cellulose ether, 2 parts of hydrophobic glue powder, 0.5 part of polyoxyethylene, 0.5 part of powder wetting agent, 0.1 part of water reducing agent, 0.5 part of defoaming agent, 5 parts of fly ash, 5 parts of ash calcium and 35 parts of quartz sand.
The Portland cement: intensity rating of 42.5;
the composite high-alumina cement: from Kainus (China) silicate technology, Inc., model PP 8203;
the hydrophobically modified cellulose ether: 7.5 million HEC;
the hydrophobic rubber powder comprises the following components: is VAE hydrophobic rubber powder;
the powder wetting agent comprises: is an organometallic ester wetting agent;
the water reducing agent is as follows: is a polycarboxylic acid water reducing agent;
the defoaming agent comprises the following components: is an organic silicon defoamer;
the fly ash: is first-grade fly ash;
the lime calcium: the fineness is 400 meshes;
the quartz sand: the fineness is 80 meshes to 120 meshes.
The production process of the delayed coagulation and rapid hardening special functional waterproof mortar is a pure physical mixing process, and various powder raw materials are uniformly mixed, so that the industrialized production process is simple, and the production process can be realized according to the production mode of common dry powder mortar.
Example 3
The slow-setting and quick-hardening special functional waterproof mortar comprises the following raw material components in parts by weight:
30 parts of Portland cement, 15 parts of composite high-alumina cement, 0.3 part of hydrophobic modified cellulose ether, 5 parts of hydrophobic rubber powder, 0.2 part of polyoxyethylene, 0.3 part of powder wetting agent, 0.12 part of water reducing agent, 0.5 part of defoaming agent, 10 parts of fly ash, 3 parts of ash calcium and 50 parts of quartz sand.
The Portland cement: intensity rating of 42.5;
the composite high-alumina cement: from Kainus (China) silicate technology, Inc., model PP 8203;
the hydrophobically modified cellulose ether: is 1 ten thousand MC;
the hydrophobic rubber powder comprises the following components: is VAE hydrophobic rubber powder;
the powder wetting agent comprises: is a polyethylene glycol wetting agent;
the water reducing agent is as follows: a naphthalene water reducing agent;
the defoaming agent comprises the following components: is an organic silicon defoamer;
the defoaming agent comprises the following components: is a polyether defoamer;
the fly ash: is first-grade fly ash;
the lime calcium: the fineness is 600 meshes;
the quartz sand: the fineness is 50 meshes to 100 meshes.
The production process of the delayed coagulation and rapid hardening special functional waterproof mortar is a pure physical mixing process, and various powder raw materials are uniformly mixed, so that the industrialized production process is simple, and the production process can be realized according to the production mode of common dry powder mortar.
Example 4
The slow-setting and quick-hardening special functional waterproof mortar comprises the following raw material components in parts by weight:
30 parts of Portland cement, 15 parts of composite high-alumina cement, 0.5 part of hydrophobic modified cellulose ether, 4 parts of hydrophobic rubber powder, 0.5 part of polyoxyethylene, 0.5 part of powder wetting agent, 0.05 part of water reducing agent, 0.3 part of defoaming agent, 8 parts of fly ash, 3 parts of ash calcium and 32 parts of quartz sand.
The Portland cement: intensity rating of 52.5;
the composite high-alumina cement: from Kainus (China) silicate technology, Inc., model PP 8203;
the hydrophobically modified cellulose ether: 1 million CMC;
the hydrophobic rubber powder comprises the following components: is acrylate hydrophobic rubber powder;
the powder wetting agent comprises: is a polyethylene glycol wetting agent;
the water reducing agent is as follows: is a melamine water reducing agent;
the defoaming agent comprises the following components: is a polyether defoamer;
the fly ash: is first-grade fly ash;
the fly ash: is second-grade fly ash;
the lime calcium: the fineness is 600 meshes;
the quartz sand: the fineness is 80 meshes to 120 meshes.
The production process of the delayed coagulation and rapid hardening special functional waterproof mortar is a pure physical mixing process, and various powder raw materials are uniformly mixed, so that the industrialized production process is simple, and the production process can be realized according to the production mode of common dry powder mortar.
Example 5
The slow-setting and quick-hardening special functional waterproof mortar comprises the following raw material components in parts by weight:
30 parts of Portland cement, 20 parts of composite high-alumina cement, 0.2 part of hydrophobic modified cellulose ether, 4 parts of hydrophobic rubber powder, 0.5 part of polyoxyethylene, 0.2 part of powder wetting agent, 0.3 part of water reducing agent, 0.6 part of defoaming agent, 10 parts of fly ash, 3 parts of ash calcium and 40 parts of quartz sand.
The Portland cement: intensity rating of 42.5;
the composite high-alumina cement: from Kainus (China) silicate technology, Inc., model PP 8203;
the hydrophobically modified cellulose ether: is 7.5 million HPMC;
the hydrophobic rubber powder comprises the following components: is VAE hydrophobic rubber powder;
the powder wetting agent comprises: is a wetting agent of alkylene oxide copolymer type;
the water reducing agent is as follows: is a polycarboxylic acid water reducing agent;
the defoaming agent comprises the following components: is an organic silicon defoamer;
the fly ash: is three fly ashes;
the lime calcium: the fineness is 325 meshes;
the quartz sand: the fineness is 8 meshes to 120 meshes.
The production process of the delayed coagulation and rapid hardening special functional waterproof mortar is a pure physical mixing process, and various powder raw materials are uniformly mixed, so that the industrialized production process is simple, and the production process can be realized according to the production mode of common dry powder mortar.
And (3) detection results:
after the retarding and quick-hardening special functional waterproof mortar prepared by the embodiment is mixed with tap water according to the proportion of 100 (22-25), performance detection is carried out according to industry related standards, and the physical performance detection results are shown in the following table:
as can be seen from the above table, the initial setting time of the slow setting and quick hardening special function waterproof mortar is 180-; the 7d flexural strength is 4.3-5.0MPa, and the 28d flexural strength is 8.1-8.9 MPa; the 7d compressive strength is 12.4-13.0MPa, the 28d compressive strength is 24.3-26.2MPa, the flexibility (transverse deformation) is 10.2-10.6mm, the bridging crack capacity is 1.01-1.08mm, the coating impervious pressure (7 d) is 0.8-1.0MPa, the 7d tensile bond strength is 1.2-1.6MPa, the 28d tensile bond strength is 2.3-2.8MPa, the tensile bond strength after soaking in water (28 d) is 1.7-2.1MPa, and the tensile bond strength after thermal aging (28 d) is 1.9-2.1 MPa; the tensile bonding strength (28 d) after freeze-thaw cycling is 1.8-2.3 MPa; the tensile bonding strength (28 d) is 1.5 to 1.9 MPa after the mixture is dried for 40 min; the water absorption rate is 2.0-2.7%.
Example 6
The construction process comprises the following steps:
1) base surface wetting construction
And fully wetting the dry basal plane to a saturated dry state.
2) Construction of waterproof bonding layer
After the base surface is treated, a retarding and quick-hardening special functional waterproof mortar sizing material is immediately arranged on the base surface and is perpendicular to the blade coating direction of the interface layer, blade coating is carried out, the thickness is about 1.5-2.5 mm, a tooth-shaped scraper is not required for controlling the construction thickness, so that the effective waterproof thickness between teeth is prevented from being insufficient, the tooth-shaped scraper is not thick, after the tooth-shaped scraper with the thickness larger than 3mm is used for construction, ceramic tiles or insulation boards and the like are pasted, the ceramic tiles or the insulation boards are kneaded and pressed, the cement mortar can be fully adhered to the insulation boards or the ceramic tiles, the thickness is reduced by half, and therefore, the thickness of the first waterproof layer of the wall surface; and then, coating a polymer waterproof bonding sizing material on the back surface of the brick (or the insulation board) in a scraping manner for bonding, wherein the total thickness of the two materials is 2-2.5 mm, slightly knocking, flattening and compacting to improve the bonding full-bonding effect, and pointing with a pointing agent after the bonding layer is finally set. The mortar stained and dropped during pointing should be cleaned before initial setting.
3) The performance of the slow-setting and quick-hardening special function waterproof mortar is changed, so that the mortar not only meets the standard of waterproof materials, but also meets the standard of bonding materials, the waterproof layer and the bonding layer are combined into a whole, the construction process and the use of construction materials are simplified, the self weight of the wall body is reduced, the production efficiency is improved, and the construction cost is reduced.
The performance in construction is shown in examples 1-4, and the finished mortar has good workability when being mixed with water in construction; the mixed slurry has better thixotropy during construction and is easy to scrape; has better wettability, and the slurry can easily reach full adhesion with the base layer and the ceramic tile and can be tightly combined. Example 5 is inferior to the above.
Except for special description, the percentages are mass percentages, and the ratios are mass ratios.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (2)
1. The slow-setting and quick-hardening special functional waterproof mortar is characterized in that: the mortar comprises the following raw materials in parts by weight: 30 parts of Portland cement, 15 parts of composite high-alumina cement, 0.5 part of hydrophobic modified cellulose ether, 4 parts of hydrophobic rubber powder, 0.5 part of polyoxyethylene, 0.5 part of powder wetting agent, 0.05 part of water reducing agent, 0.3 part of defoaming agent, 8 parts of fly ash, 3 parts of ash calcium and 32 parts of quartz sand;
the defoaming agent is a powder defoaming agent, and the powder defoaming agent is polyether;
the quartz sand: the fineness is 80-120 meshes;
the fly ash is primary fly ash and secondary fly ash;
the fineness of the ash calcium is 600 meshes;
the water reducing agent is a melamine water reducing agent;
the powder wetting agent is polyethylene glycol ester;
the hydrophobic rubber powder is acrylic rubber powder;
the composite high-alumina cement: model number PP 8203;
the slow-setting and quick-hardening special functional waterproof mortar is prepared by the following steps: the initial setting time is 207 min, and the final setting time is 251 min; the 7d flexural strength is 5.0MPa, and the 28d flexural strength is 8.8 MPa; the 7d compressive strength is 12.8MPa, the 28d compressive strength is 25.0MPa, the transverse deformation is 10.3mm, the crack bridging capacity is 1.04mm, and the water absorption is 2.7%.
2. The slow-setting and rapid-hardening special functional waterproof mortar according to claim 1, characterized in that: the Portland cement: the intensity grade is above 42.5.
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| CN108947430B true CN108947430B (en) | 2021-08-20 |
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| CN109608125A (en) * | 2018-12-10 | 2019-04-12 | 三筑工科技有限公司 | Filleting mortar and its preparation method and application |
| CN110105027A (en) * | 2019-04-19 | 2019-08-09 | 湖北蓝瑞联合建筑科技有限公司 | The backwater that a kind of back side and upstream face can construct applies material and preparation method thereof |
| CN110386792A (en) * | 2019-08-23 | 2019-10-29 | 四川蓝筹建材有限公司 | A kind of high bonding ceramic tile morta |
| CN113896496A (en) * | 2021-09-16 | 2022-01-07 | 上海三棵树防水技术有限公司 | Preparation method of single-component polymer ultrafast waterproof slurry |
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