CN113845347A - High-strength high-toughness composite compact cementing material - Google Patents
High-strength high-toughness composite compact cementing material Download PDFInfo
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- CN113845347A CN113845347A CN202111260831.9A CN202111260831A CN113845347A CN 113845347 A CN113845347 A CN 113845347A CN 202111260831 A CN202111260831 A CN 202111260831A CN 113845347 A CN113845347 A CN 113845347A
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- 239000000463 material Substances 0.000 title claims abstract description 39
- 239000002131 composite material Substances 0.000 title claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 27
- 229920002401 polyacrylamide Polymers 0.000 claims abstract description 22
- 239000004814 polyurethane Substances 0.000 claims abstract description 18
- 239000000843 powder Substances 0.000 claims abstract description 17
- 229920002239 polyacrylonitrile Polymers 0.000 claims abstract description 16
- 229920002635 polyurethane Polymers 0.000 claims abstract description 16
- 239000006004 Quartz sand Substances 0.000 claims abstract description 15
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 15
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 13
- 239000000835 fiber Substances 0.000 claims abstract description 12
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 12
- 239000011707 mineral Substances 0.000 claims abstract description 12
- 239000011398 Portland cement Substances 0.000 claims abstract description 11
- 239000002253 acid Substances 0.000 claims abstract description 10
- 238000013008 moisture curing Methods 0.000 claims abstract description 10
- 239000010881 fly ash Substances 0.000 claims abstract description 7
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 4
- 239000004568 cement Substances 0.000 claims description 12
- 239000003638 chemical reducing agent Substances 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- 235000010755 mineral Nutrition 0.000 claims description 11
- -1 polysiloxane Polymers 0.000 claims description 10
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 8
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 8
- 229920000570 polyether Polymers 0.000 claims description 8
- 229920001296 polysiloxane Polymers 0.000 claims description 8
- 229910052710 silicon Inorganic materials 0.000 claims description 8
- 239000010703 silicon Substances 0.000 claims description 8
- AEQDJSLRWYMAQI-UHFFFAOYSA-N 2,3,9,10-tetramethoxy-6,8,13,13a-tetrahydro-5H-isoquinolino[2,1-b]isoquinoline Chemical compound C1CN2CC(C(=C(OC)C=C3)OC)=C3CC2C2=C1C=C(OC)C(OC)=C2 AEQDJSLRWYMAQI-UHFFFAOYSA-N 0.000 claims description 6
- 239000000176 sodium gluconate Substances 0.000 claims description 6
- 229940005574 sodium gluconate Drugs 0.000 claims description 6
- 235000012207 sodium gluconate Nutrition 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 6
- 239000010883 coal ash Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 3
- 239000011343 solid material Substances 0.000 claims description 3
- 230000008961 swelling Effects 0.000 claims description 3
- 239000008399 tap water Substances 0.000 claims description 3
- 235000020679 tap water Nutrition 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 abstract description 9
- 230000007797 corrosion Effects 0.000 abstract description 7
- 239000000126 substance Substances 0.000 abstract description 6
- 239000003513 alkali Substances 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 4
- 230000035699 permeability Effects 0.000 abstract description 4
- 230000002787 reinforcement Effects 0.000 abstract description 4
- 230000036571 hydration Effects 0.000 description 10
- 238000006703 hydration reaction Methods 0.000 description 10
- 230000009471 action Effects 0.000 description 4
- 239000011147 inorganic material Substances 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 230000008014 freezing Effects 0.000 description 3
- 238000007710 freezing Methods 0.000 description 3
- 239000011368 organic material Substances 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 238000005411 Van der Waals force Methods 0.000 description 2
- 230000003487 anti-permeability effect Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- 239000000378 calcium silicate Substances 0.000 description 2
- 229910052918 calcium silicate Inorganic materials 0.000 description 2
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000007123 defense Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 229920005570 flexible polymer Polymers 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 229910010272 inorganic material Inorganic materials 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 230000036314 physical performance Effects 0.000 description 2
- 229920006112 polar polymer Polymers 0.000 description 2
- 239000002952 polymeric resin Substances 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 229920003169 water-soluble polymer Polymers 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/04—Silica-rich materials; Silicates
- C04B14/06—Quartz; Sand
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B16/00—Use of organic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of organic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B16/04—Macromolecular compounds
- C04B16/06—Macromolecular compounds fibrous
- C04B16/0616—Macromolecular compounds fibrous from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B16/065—Polyacrylates; Polymethacrylates
- C04B16/0658—Polyacrylonitrile
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
- C04B18/08—Flue dust, i.e. fly ash
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/12—Waste materials; Refuse from quarries, mining or the like
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/146—Silica fume
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/26—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/2652—Nitrogen containing polymers, e.g. polyacrylamides, polyacrylonitriles
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/28—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/282—Polyurethanes; Polyisocyanates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/40—Compounds containing silicon, titanium or zirconium or other organo-metallic compounds; Organo-clays; Organo-inorganic complexes
- C04B24/42—Organo-silicon compounds
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/50—Defoamers, air detrainers
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention relates to a high-strength high-toughness composite compact cementing material, which comprises the following components: quartz sand, portland cement, alkaline mineral powder, silica micropowder, fly ash, polycarboxylic acid high efficiency, an expanding agent, a retarder, a defoaming agent, polyacrylonitrile fiber, moisture-curing single-component polyurethane, polyacrylamide and water. The technical scheme has excellent physical and chemical properties such as deformation capacity, fatigue strength, wear resistance, bonding strength, frost resistance, corrosion resistance, permeability resistance and the like, and can be widely applied to the fields of special engineering, saline-alkali regions, special bridges, roads, bridges and buildings in alpine regions, building maintenance and reinforcement and the like.
Description
Technical Field
The invention relates to the field of building engineering materials, in particular to a high-strength high-toughness composite compact cementing material.
Background
The cementing material for the building is various and can be divided into two types according to the material types: inorganic and organic cementing materials. The inorganic cementing materials mainly comprise cement, lime and the like, and the most common organic cementing materials are asphalt and high molecular polymers. The cement-based cementing material, low cost, high strength, high modulus and high bearing capacity are widely applied, but the application range of the cementing material is limited by large brittleness, poor ductility, poor freezing resistance, poor corrosion resistance, low bonding strength and uneven compactness.
Inorganic or organic materials are used alone, and the cementing material with high strength, high toughness and high compactness is difficult to achieve.
The cement cementing material system has uneven quality, and different material selection and ingredient ratios often cause great performance difference. When selecting organic materials, it is difficult to match compatibility and achieve compatibility and usability.
The selection of each unit component, the distribution ratio of each component, the proportion of inorganic and organic materials and the specific construction process can obviously influence the service performance of the material in each step. The balance of various properties is difficult.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a high-strength high-toughness composite compact cementing material which has excellent physical and chemical properties such as deformation capacity, fatigue strength, wear resistance, bonding strength, frost resistance, corrosion resistance, permeability resistance and the like, and can be widely applied to the fields of special engineering, saline-alkali regions, special bridges, roads and bridges in alpine regions, buildings, maintenance and reinforcement of the buildings and the like.
The technical scheme for solving the technical problems is as follows:
a high-strength high-toughness composite compact cementing material comprises the following components: quartz sand, portland cement, alkaline mineral powder, silica micropowder, fly ash, polycarboxylic acid high efficiency, an expanding agent, a retarder, a defoaming agent, polyacrylonitrile fiber, moisture-curing single-component polyurethane, polyacrylamide and water.
Further limiting, the mass percentage of each component is as follows:
quartz sand wt%: 35.06, respectively;
wt% of Portland cement: 21.49, respectively;
alkaline mineral powder wt%: 8.60 parts of;
weight percent of silicon micropowder: 4.29;
and (2) coal ash wt%: 4.29;
the weight percent of the polycarboxylic acid high-efficiency water reducing agent is: 0.22;
swelling agent wt%: 4.19;
retarder sodium gluconate wt%: 0.05;
weight percent of polyether modified polysiloxane defoaming agent: 0.22;
weight percent of polyacrylonitrile fiber: 1.50;
moisture-curing type one-component polyurethane wt%: 6.10;
polyacrylamide wt%: 4.69;
water wt%: 9.30.
further limiting, the fineness modulus of the quartz sand is 2.7, the defoaming agent is polyether modified polysiloxane, the water reducing agent is a polycarboxylic acid high-efficiency water reducing agent, and the slow release agent is sodium gluconate.
Further limiting, the configuration method is as follows:
weighing the solid material part (comprising quartz sand, cement, alkaline mineral powder, fly ash, silicon micropowder, an expanding agent, a water reducing agent, a defoaming agent and a retarder) in proportion, adding into a stirrer, and stirring for 5-10 min;
weighing tap water according to a proportion, adding quantitative polyacrylamide powder particles, stirring for dissolving, adding into a stirrer, and stirring for 10-15 min;
and adding the moisture-curing single-component polyurethane and the polyacrylonitrile fiber in sequence, and stirring for 25-35 min.
The invention has the beneficial effects that:
quartz sand (medium sand: fineness modulus 2.7) is used as the cementing material aggregate, and the medium sand is selected for double consideration of compactness and use strength;
72.5 superfine portland cement is used as a main body of an inorganic gelling system, and 72.5 portland cement is selected because the type of cement is slow in setting, low in hydration heat, dense in chemical bonds, high in molding compactness, high in later strength and less in internal stress defect;
the alkaline mineral powder can delay the hydration rate and reduce the hydration heat, thereby eliminating the internal stress; the system fluidity is improved, and the compactness is improved; calcium hydroxide excitation activity accumulated on the interface is consumed in the later period, the later strength is improved through further reaction, and the porosity is reduced;
the silicon micro powder effectively improves the strength and the compactness and increases the wear resistance;
the coal ash can reduce the porosity, improve the pore structure and the interface characteristics and improve the later strength;
the polyether modified polysiloxane as the defoaming agent can effectively reduce the gas residue of the system and further improve the compactness;
polyacrylonitrile fibers (PAN) can enhance physical macroscopic bond toughening, which will serve as the last line of defense against cracking in extreme environments. The polypropylene is a polar polymer and has good compatibility with calcium silicate hydrate;
the moisture-cured single-component Polyurethane (PU) is used as a low-temperature-resistant flexible polymer, plays a role in microscopic toughening, is uniformly dispersed in the whole system along with the flow of water, is cured by water and is simultaneously hydrated with silicate, and the inorganic material and the polyurethane form a hard-soft combined microscopic sea-island structure, so that the freezing resistance, the deformation capability, the fatigue strength and the corrosion and water resistance of the material are obviously improved. When selecting polyurethane, the polyurethane is suitable for selecting a model which is single-component moisture-cured and is slowly cured;
polyacrylamide (PAM) is a water-soluble polymer resin, and can be uniformly dispersed along with the flow of water. Amorphous PAM is a hard and brittle material with a narrow range of applications, and as the crystallinity increases, PAM becomes hard and strong and plasticity increases significantly. In a mixed material system, due to the low hydration heat and low temperature of the system, no external force shearing action exists after standing, PAM is separated out from water, sufficient time is provided for slow crystallization, the crystal structure is complete, the overall strength is high, the toughness is higher, the PAN and PU-cement matrix systems are perfectly compatible due to the action of Van der Waals force and hydrogen bonds, and the bonding strength of the system is obviously improved. PAM forms continuous space network structure and intertwine between the slurry, plays the reinforcing effect to the slurry structure, improves rupture strength.
The technical scheme has excellent physical and chemical properties such as deformation capacity, fatigue strength, wear resistance, bonding strength, frost resistance, corrosion resistance, permeability resistance and the like, and can be widely applied to the fields of special engineering, saline-alkali regions, special bridges, roads, bridges and buildings in alpine regions, building maintenance and reinforcement and the like;
the organic cementing material is a flexible material, has good ductility, toughness, light weight, bonding strength and frost resistance, but has low strength, low bearing capacity, large thermal expansion coefficient and generally high cost.
The polymer and the cement-based material are well fused, so that the porosity can be obviously reduced, the anti-permeability is obviously improved, and the waterproof and anti-corrosion performance is improved; the hydration rate can be reduced, the internal stress is eliminated, and the physical performance after molding is improved; and the reinforcing is performed to form a film, so that the bending ratio is reduced, and the toughness of the formed material is enhanced.
Detailed Description
The principles and features of this invention are described below in conjunction with examples which are set forth to illustrate, but are not to be construed to limit the scope of the invention.
A high-strength high-toughness composite compact cementing material comprises the following components: quartz sand, portland cement, alkaline mineral powder, silica micropowder, fly ash, polycarboxylic acid high efficiency, an expanding agent, a retarder, a defoaming agent, polyacrylonitrile fiber, moisture-curing single-component polyurethane, polyacrylamide and water.
Further limiting, the mass percentage of each component is as follows:
quartz sand wt%: 35.06, respectively;
wt% of Portland cement: 21.49, respectively;
alkaline mineral powder wt%: 8.60 parts of;
weight percent of silicon micropowder: 4.29;
and (2) coal ash wt%: 4.29;
the weight percent of the polycarboxylic acid high-efficiency water reducing agent is: 0.22;
swelling agent wt%: 4.19;
retarder sodium gluconate wt%: 0.05;
weight percent of polyether modified polysiloxane defoaming agent: 0.22;
weight percent of polyacrylonitrile fiber: 1.50;
moisture-curing type one-component polyurethane wt%: 6.10;
polyacrylamide wt%: 4.69;
water wt%: 9.30.
further limiting, the fineness modulus of the quartz sand is 2.7, the defoaming agent is polyether modified polysiloxane, the water reducing agent is a polycarboxylic acid high-efficiency water reducing agent, and the slow release agent is sodium gluconate.
Further limiting, the configuration method is as follows:
weighing the solid material part (comprising quartz sand, cement, alkaline mineral powder, fly ash, silicon micropowder, an expanding agent, a water reducing agent, a defoaming agent and a retarder) in proportion, adding into a stirrer, and stirring for 5-10 min;
weighing tap water according to a proportion, adding quantitative polyacrylamide powder particles, stirring for dissolving, adding into a stirrer, and stirring for 10-15 min;
and adding the moisture-curing single-component polyurethane and the polyacrylonitrile fiber in sequence, and stirring for 25-35 min.
In this embodiment:
quartz sand (medium sand: fineness modulus 2.7) is used as the cementing material aggregate, and the medium sand is selected for double consideration of compactness and use strength;
72.5 superfine portland cement is used as a main body of an inorganic gelling system, and 72.5 portland cement is selected because the type of cement is slow in setting, low in hydration heat, dense in chemical bonds, high in molding compactness, high in later strength and less in internal stress defect;
the alkaline mineral powder can delay the hydration rate and reduce the hydration heat, thereby eliminating the internal stress; the system fluidity is improved, and the compactness is improved; calcium hydroxide excitation activity accumulated on the interface is consumed in the later period, the later strength is improved through further reaction, and the porosity is reduced;
the silicon micro powder effectively improves the strength and the compactness and increases the wear resistance;
the coal ash can reduce the porosity, improve the pore structure and the interface characteristics and improve the later strength;
the polyether modified polysiloxane as the defoaming agent can effectively reduce the gas residue of the system and further improve the compactness;
polyacrylonitrile fibers (PAN) can enhance physical macroscopic bond toughening, which will serve as the last line of defense against cracking in extreme environments. The polypropylene is a polar polymer and has good compatibility with calcium silicate hydrate;
the moisture-cured single-component Polyurethane (PU) is used as a low-temperature-resistant flexible polymer, plays a role in microscopic toughening, is uniformly dispersed in the whole system along with the flow of water, is cured by water and is simultaneously hydrated with silicate, and the inorganic material and the polyurethane form a hard-soft combined microscopic sea-island structure, so that the freezing resistance, the deformation capability, the fatigue strength and the corrosion and water resistance of the material are obviously improved. When selecting polyurethane, the polyurethane is suitable for selecting a model which is single-component moisture-cured and is slowly cured;
polyacrylamide (PAM) is a water-soluble polymer resin, and can be uniformly dispersed along with the flow of water. Amorphous PAM is a hard and brittle material with a narrow range of applications, and as the crystallinity increases, PAM becomes hard and strong and plasticity increases significantly. In a mixed material system, due to the low hydration heat and low temperature of the system, no external force shearing action exists after standing, PAM is separated out from water, sufficient time is provided for slow crystallization, the crystal structure is complete, the overall strength is high, the toughness is higher, the PAN and PU-cement matrix systems are perfectly compatible due to the action of Van der Waals force and hydrogen bonds, and the bonding strength of the system is obviously improved. PAM forms continuous space network structure and intertwine between the slurry, plays the reinforcing effect to the slurry structure, improves rupture strength.
The technical scheme has excellent physical and chemical properties such as deformation capacity, fatigue strength, wear resistance, bonding strength, frost resistance, corrosion resistance, permeability resistance and the like, and can be widely applied to the fields of special engineering, saline-alkali regions, special bridges, roads, bridges and buildings in alpine regions, building maintenance and reinforcement and the like;
the organic cementing material is a flexible material, has good ductility, toughness, light weight, bonding strength and frost resistance, but has low strength, low bearing capacity, large thermal expansion coefficient and generally high cost.
The polymer and the cement-based material are well fused, so that the porosity can be obviously reduced, the anti-permeability is obviously improved, and the waterproof and anti-corrosion performance is improved; the hydration rate can be reduced, the internal stress is eliminated, and the physical performance after molding is improved; and the reinforcing is performed to form a film, so that the bending ratio is reduced, and the toughness of the formed material is enhanced. The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (4)
1. A high-strength high-toughness composite compact cementing material is characterized in that: comprises the following components: quartz sand, portland cement, alkaline mineral powder, silica micropowder, fly ash, polycarboxylic acid high efficiency, an expanding agent, a retarder, a defoaming agent, polyacrylonitrile fiber, moisture-curing single-component polyurethane, polyacrylamide and water.
2. The high-strength high-toughness composite compact cementitious material according to claim 1, characterized in that: the weight percentages of the components are as follows:
quartz sand wt%: 35.06, respectively;
wt% of Portland cement: 21.49, respectively;
alkaline mineral powder wt%: 8.60 parts of;
weight percent of silicon micropowder: 4.29;
and (2) coal ash wt%: 4.29;
the weight percent of the polycarboxylic acid high-efficiency water reducing agent is: 0.22;
swelling agent wt%: 4.19;
retarder sodium gluconate wt%: 0.05;
weight percent of polyether modified polysiloxane defoaming agent: 0.22;
weight percent of polyacrylonitrile fiber: 1.50;
moisture-curing type one-component polyurethane wt%: 6.10;
polyacrylamide wt%: 4.69;
water wt%: 9.30.
3. the high-strength high-toughness composite compact cementitious material according to claim 2, characterized in that: the fineness modulus of the quartz sand is 2.7, the defoaming agent is polyether modified polysiloxane, the water reducing agent is a polycarboxylic acid high-efficiency water reducing agent, and the slow release agent is sodium gluconate.
4. The high-strength high-toughness composite compact cementitious material according to claim 3, characterized in that: the configuration method comprises the following steps:
weighing the solid material part (comprising quartz sand, cement, alkaline mineral powder, fly ash, silicon micropowder, an expanding agent, a water reducing agent, a defoaming agent and a retarder) in proportion, adding into a stirrer, and stirring for 5-10 min;
weighing tap water according to a proportion, adding quantitative polyacrylamide powder particles, stirring for dissolving, adding into a stirrer, and stirring for 10-15 min;
and adding the moisture-curing single-component polyurethane and the polyacrylonitrile fiber in sequence, and stirring for 25-35 min.
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