CN115010430A - Water-based concrete with improved durability and preparation method thereof - Google Patents
Water-based concrete with improved durability and preparation method thereof Download PDFInfo
- Publication number
- CN115010430A CN115010430A CN202210606441.0A CN202210606441A CN115010430A CN 115010430 A CN115010430 A CN 115010430A CN 202210606441 A CN202210606441 A CN 202210606441A CN 115010430 A CN115010430 A CN 115010430A
- Authority
- CN
- China
- Prior art keywords
- water
- parts
- concrete
- mica powder
- based concrete
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000004567 concrete Substances 0.000 title claims abstract description 94
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 80
- 238000002360 preparation method Methods 0.000 title claims abstract description 27
- 239000000843 powder Substances 0.000 claims abstract description 96
- 239000010445 mica Substances 0.000 claims abstract description 69
- 229910052618 mica group Inorganic materials 0.000 claims abstract description 69
- 229920000058 polyacrylate Polymers 0.000 claims abstract description 62
- 229920001577 copolymer Polymers 0.000 claims abstract description 56
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 54
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 50
- 239000007788 liquid Substances 0.000 claims abstract description 45
- 239000000835 fiber Substances 0.000 claims abstract description 38
- 239000000654 additive Substances 0.000 claims abstract description 33
- 239000011787 zinc oxide Substances 0.000 claims abstract description 25
- 239000000839 emulsion Substances 0.000 claims abstract description 15
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000011575 calcium Substances 0.000 claims abstract description 14
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 14
- 239000002994 raw material Substances 0.000 claims abstract description 14
- 238000010438 heat treatment Methods 0.000 claims description 63
- 238000010008 shearing Methods 0.000 claims description 62
- 238000002156 mixing Methods 0.000 claims description 44
- 238000006116 polymerization reaction Methods 0.000 claims description 40
- 238000007334 copolymerization reaction Methods 0.000 claims description 35
- 239000004568 cement Substances 0.000 claims description 31
- 230000000996 additive effect Effects 0.000 claims description 28
- 238000007580 dry-mixing Methods 0.000 claims description 27
- 239000010881 fly ash Substances 0.000 claims description 27
- 239000004576 sand Substances 0.000 claims description 27
- 239000002893 slag Substances 0.000 claims description 27
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 26
- 239000002270 dispersing agent Substances 0.000 claims description 17
- 239000003999 initiator Substances 0.000 claims description 16
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 13
- 239000001569 carbon dioxide Substances 0.000 claims description 13
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 11
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 11
- 241001330002 Bambuseae Species 0.000 claims description 11
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 11
- 239000011425 bamboo Substances 0.000 claims description 11
- 238000003756 stirring Methods 0.000 claims description 11
- 239000004575 stone Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 9
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 8
- 239000004917 carbon fiber Substances 0.000 claims description 8
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 8
- 238000010276 construction Methods 0.000 claims description 4
- 229920002748 Basalt fiber Polymers 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 17
- 238000010521 absorption reaction Methods 0.000 abstract description 8
- 238000011161 development Methods 0.000 abstract description 8
- 230000035699 permeability Effects 0.000 abstract description 7
- 238000003763 carbonization Methods 0.000 abstract description 4
- 238000006703 hydration reaction Methods 0.000 description 34
- 230000036571 hydration Effects 0.000 description 30
- 238000012360 testing method Methods 0.000 description 19
- 230000000052 comparative effect Effects 0.000 description 14
- 229920002635 polyurethane Polymers 0.000 description 11
- 239000004814 polyurethane Substances 0.000 description 11
- 230000006378 damage Effects 0.000 description 9
- 239000011380 pervious concrete Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 5
- 239000006185 dispersion Substances 0.000 description 5
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical class [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 5
- 238000009210 therapy by ultrasound Methods 0.000 description 5
- 230000002035 prolonged effect Effects 0.000 description 4
- 239000013078 crystal Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 229910010271 silicon carbide Inorganic materials 0.000 description 3
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 description 2
- 239000012615 aggregate Substances 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 210000003850 cellular structure Anatomy 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 235000019830 sodium polyphosphate Nutrition 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00284—Materials permeable to liquids
-
- 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
-
- 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
- C04B2201/52—High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]
-
- 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 provides a water-based concrete for improving durability and a preparation method thereof, the raw materials of the water-based concrete are taken as basic materials, tetrapod-like zinc oxide whiskers, pre-dispersed polyacrylate modified mica powder copolymer feed liquid and toughening fibers are respectively matched as additives, calcium sulphoaluminate expanding agent and silicone-acrylate emulsion are taken as expanding agents, wherein the tetrapod-like zinc oxide whiskers and the pre-dispersed polyacrylate modified mica powder copolymer feed liquid are taken as the additives, so that the components are synergized, the water permeability coefficient and the compressive strength of the obtained water-based concrete are good, the durability index is high and can reach 133, the carbonization depth value is 26.5mm, the absorption degree of the water-based concrete on impact capacity can be improved, the development, extension and combination of microcracks are effectively prevented, and the durability of the water-based concrete is improved.
Description
Technical Field
The invention relates to the technical field of preparation of water-based concrete, in particular to water-based concrete with improved durability and a preparation method thereof.
Background
The pervious concrete is also called porous concrete and sand-free concrete, is porous light concrete mixed by aggregate, cement, reinforcing agent and water, is a porous cellular structure formed by mutually bonding coarse aggregate surface coated cement paste, and has the advantages of water permeability, light weight and the like. The prior art researches the balance problem of porosity and compressive strength of pervious concrete more, and aims to obtain pervious concrete with good permeability and high compressive strength.
However, the pervious concrete can generate hydration heat to release heat in the process of construction and pouring, and the concrete affected by a large amount of heat can damage the microstructure of the pervious concrete due to the action of temperature stress. Over time, these damaged structures can develop into detrimental structural cracks that reduce the durability of the pervious concrete. Meanwhile, when the permeable concrete cracks and finally the structure is completely damaged, the occurrence speed is high, and the difficulty degree of repairing the permeable concrete cracks is greatly increased.
Disclosure of Invention
In view of the above, the present invention aims to provide a water-based concrete with improved durability and a preparation method thereof, so as to solve the above problems.
The technical scheme of the invention is realized as follows:
the water-based concrete with improved durability comprises the following raw materials in parts by weight: 300-340 parts of cement, 25-45 parts of fly ash, 90-120 parts of slag powder, 660-700 parts of sand, 1000-1060 parts of broken stone, 140-180 parts of water, 14-18 parts of an additive and 30-40 parts of an expanding agent;
the admixture is prepared from the following components in a mass ratio of 1-2: 6-9: 0.6-0.8 of tetrapod-like zinc oxide whiskers, pre-dispersed polyacrylate modified mica powder copolymer feed liquid and toughening fibers; the pre-dispersed polyacrylate modified mica powder copolymer feed liquid prepared by polyacrylate has stronger dispersion effect, is combined with the tetrapod-shaped zinc oxide crystals, can form a partial interactive net-shaped three-dimensional structure with hydration products, can effectively adjust the hydration degree, improves the workability of concrete, forms an effective 'occlusion' effect between the pre-dispersed polyacrylate modified mica powder copolymer feed liquid and materials, avoids further dislocation of the structure, is beneficial to preventing the development and combination of internal microcracks, and improves the absorption degree of the impact capacity of the concrete;
preferably, the feed comprises the following raw materials in parts by weight: 320 parts of cement, 35 parts of fly ash, 105 parts of slag powder, 684 parts of sand, 1030 parts of broken stone, 161 parts of water, 16.6 parts of an additive and 35 parts of an expanding agent; the use amount of the additive in a certain proportion is controlled, so that the early hydration process can be delayed, the full hydration of the material can be promoted, and the strength of the concrete in the middle and later periods can be improved; the tetrapod-like zinc oxide whiskers, the pre-dispersed polyurethane modified mica powder copolymer feed liquid and the toughening fibers are added excessively, so that the surface area of a hydration product is reduced, the reaction rate is slowed, the hydration reaction time is prolonged, the adhesion among materials is reduced, and the impact resistance is reduced.
The admixture is prepared from the following components in percentage by mass 2: 7: 0.7 of tetrapod-like zinc oxide whiskers, pre-dispersed polyacrylate modified mica powder copolymer feed liquid and toughening fibers; the tetrapod-like zinc oxide whisker can avoid concentrated heat release of early hydration, reduce micro-cracks formed by a large amount of hydration heat, improve the distribution uniformity of hydration products and contribute to improving the absorption degree of a system on damage impact energy;
further, the expanding agent is prepared from the following components in a mass ratio of 1: 0.2-0.4 of calcium sulphoaluminate expanding agent and silicone-acrylate emulsion; the silicone-acrylic emulsion can reduce the usage amount of the expanding agent, and is also beneficial to improving the dispersion degree of the pre-dispersed polyacrylate modified mica powder copolymer liquid, so that the expanding agent and the additive are mutually cooperated.
The toughening fiber is at least one of bamboo fiber, carbon fiber, basalt fiber or steel fiber.
Further, the preparation method of the pre-dispersed polyacrylate modified mica powder copolymer feed liquid comprises the following steps: mixing polyacrylate and mica powder, heating by microwave for polymerization, adding an initiator and a dispersant under the condition of supercritical carbon dioxide, and carrying out copolymerization reaction to obtain pre-dispersed polyacrylate modified mica powder copolymer feed liquid;
the mass ratio of the polyacrylate, the mica powder, the initiator and the dispersant is 1: 0.2-0.4: 0.06-0.08: 2-2.5;
the polyacrylate, the mica powder, the initiator and the dispersant are used as raw materials, microwave heating polymerization and carbon dioxide copolymerization are sequentially carried out, so that the pre-dispersed polyacrylate modified mica powder copolymer liquid is obtained, the copolymerization degree is high, the active groups of the copolymer are easy to combine and exchange with free ions of hydration products in hydration reaction, an effective bridging effect is formed, the dispersion degree of energy absorption is promoted, the stress state in concrete is adjusted, the development, extension and combination of microcracks are prevented, and the durability of the water-based concrete is improved.
Further, the microwave frequency of the microwave heating polymerization is 4000-6000MHZ, and the time of the microwave heating polymerization is 2-5 min; the temperature of the copolymerization reaction is 50-60 ℃, and the time of the copolymerization reaction is 30-50 min.
Further, mixing cement, fly ash, slag powder, sand and broken stone, after dry mixing and shearing, adding an additive and water for wet mixing and shearing, adding an expanding agent for stirring, injecting into a mould, and curing to prepare the water-based concrete.
Further, the dry shearing method comprises the following steps: dry mixing at 30-35 deg.C for 2-4 hr, and shearing at 30-35 deg.C for 2-4 hr; the shear rate is 300-1200 r/min.
Further, the wet mixing and shearing are as follows: shearing while heating to 40-50 deg.C.
Further, the heating rate is 0.5-1 ℃/min; the shear rate is 300-400 r/min.
The invention can fully preheat cement, fly ash, slag powder, sand and broken stone through dry shearing, is beneficial to slowing down the release rate of hydration heat reaction after the addition of the additive, adopts wet mixing shearing, increases the heated area, controls the heating rate, avoids the phenomenon that the upper layer of the system is easy to agglomerate, and promotes the components to form a stable structure.
Compared with the prior art, the invention has the beneficial effects that:
(1) the raw materials of the pervious concrete are used as base materials, the tetrapod-like zinc oxide whiskers, the pre-dispersed polyacrylate modified mica powder copolymer liquid and the toughening fibers are respectively matched as additives, the calcium sulphoaluminate expanding agent and the silicone-acrylate emulsion are used as expanding agents and are added into the base materials, the mixture ratio is scientific, and the materials are synergistic, so that the water-based concrete obtained by the invention has the advantages of good water permeability coefficient and compressive strength, high durability index reaching 133, and 26.5mm depth of carbonization, can improve the absorption degree of the impact capability of the water-based concrete, effectively prevents the development, extension and combination of microcracks, and is beneficial to improving the durability of the water-based concrete.
(2) According to the invention, the tetrapod-like zinc oxide whiskers and the pre-dispersed polyacrylate modified mica powder copolymer liquid are used as additives, and the components are synergistic, so that a large amount of heat released by a hydration heat reaction can be effectively reduced, the microstructure of the concrete is prevented from being damaged, more energy is absorbed before the concrete is damaged, the integrity of the concrete is improved, the development and combination of microcracks are favorably reduced, the time for completely damaging the structure is prolonged, the durability of the water-based concrete is further improved, the temperature control measures of the water-based concrete are favorably simplified, the effective mixing degree of the large-volume concrete can be realized, the construction speed is accelerated, and the construction quality is improved.
Detailed Description
In order to better understand the technical content of the invention, specific examples are provided below to further illustrate the invention.
The experimental methods used in the examples of the present invention are all conventional methods unless otherwise specified.
The materials, reagents and the like used in the examples of the present invention can be obtained commercially without specific description.
The materials used in the invention: the cement is PO42.5 cement; the fly ash is II-grade fly ash; the slag powder is S95 grade slag powder; the sand is sand in the area II; the crushed stone is 5-31.5 continuous size fraction crushed stone.
The initiator used in the invention is azobisisobutyronitrile, and the dispersant is a sodium polyphosphate dispersant.
The invention detects the hydration heat quantity of the concrete material according to a cement hydration heat measuring method (GB/T12959-2008);
the invention adopts an LC2000 drop hammer type impact tester to carry out an impact failure test on a test piece, the test piece is concrete with the length multiplied by the width multiplied by the height multiplied by 150mm multiplied by 50mm, and the impact times S of the primary cracking of the test piece is recorded 1 And the number of impacts S to complete destruction of the test piece 2 And calculating the damage impact energy W of the test piece 2 The calculation formula is as follows: w 2 ＝S 2 X m x g x h, where m is the weight of the drop weight, g is the acceleration of gravity, and h is the drop height of the drop weight.
After the concrete test block is molded and demoulded, the concrete test block is maintained for 28d, and the performance of the concrete is tested according to the standard:
according to technical regulations on pervious cement concrete pavements (CJJ/T135-2009), the water permeability coefficient of a concrete test piece is detected, and the test piece is concrete with the cube of length, width and height of 150mm, 150mm and 150 mm.
According to the standard of concrete physical mechanical property test method (GB/T50081-2019), the compressive strength of a concrete test piece is detected, and the test piece is concrete with a cube with the length, the width and the height of 150mm, the length, the width and the height of 150 mm.
According to the test procedure for hydraulic concrete (DL/T5150-2001), the frost resistance of a concrete test piece is tested, the test piece is concrete with a prism of length, width and height of 150mm, 150mm and 400mm, the freeze-thaw cycle is continuously carried out for 300 times, and the durability index is calculated according to the following formula: durability index p n X number of freeze-thaw cycles/300, wherein p n Is the relative dynamic elastic modulus, p, of the test piece n ＝f 2 n /f 2 1 ×100，f n The natural vibration frequency, Hz, f after the freeze-thaw cycle of the test piece 2 1 The natural vibration frequency before the freeze-thaw cycle of the test piece is Hz.
Example 1
The water-based concrete with improved durability comprises the following raw materials in parts by weight: 300kg of cement, 25kg of fly ash, 90kg of slag powder, 660kg of sand, 1000kg of broken stone, 140kg of water, 14kg of additive and 30kg of expanding agent;
the admixture is prepared from the following components in a mass ratio of 2: 9: 0.8 of tetrapod-like zinc oxide whiskers, pre-dispersed polyacrylate modified mica powder copolymer feed liquid and bamboo fibers;
the expanding agent is prepared from the following components in a mass ratio of 1: 0.4 of calcium sulphoaluminate expanding agent and silicone-acrylate emulsion;
the preparation method of the pre-dispersed polyacrylate modified mica powder copolymer feed liquid comprises the following steps: according to the mass ratio of 1: 0.2: 0.06: 2, mixing polyacrylate and mica powder, and carrying out microwave heating polymerization reaction, wherein the microwave frequency of the microwave heating polymerization is 4000MHZ, the microwave heating polymerization time is 2min, after the microwave heating polymerization, adding an initiator and a dispersant under the condition of supercritical carbon dioxide, and carrying out copolymerization reaction, wherein the temperature of the copolymerization reaction is 50 ℃, and the time of the copolymerization reaction is 30min, so as to obtain pre-dispersed polyacrylate modified mica powder copolymer feed liquid;
the preparation method of the water-based concrete comprises the following steps: mixing cement, fly ash, slag powder, sand and gravel, carrying out dry mixing shearing, carrying out dry mixing for 2h at 30-35 ℃, then shearing for 2-4h at 30-35 ℃ at 300r/min, adding an additive and water for wet mixing shearing at a heating rate of 0.5 ℃/min while heating to 40-50 ℃ and shearing at 300r/min, adding an expanding agent for stirring after wet mixing shearing, injecting into a mold, and curing to prepare the water-based concrete.
Example 2
The water-based concrete with improved durability comprises the following raw materials in parts by weight: 340kg of cement, 45kg of fly ash, 120kg of slag powder, 700kg of sand, 1060kg of macadam, 180 parts of water, 18 parts of additive and 40kg of expanding agent;
the admixture is prepared from the following components in a mass ratio of 1: 6: 0.6 of tetrapod-like zinc oxide whiskers, pre-dispersed polyacrylate modified mica powder copolymer feed liquid and bamboo fibers;
the expanding agent is prepared from the following components in a mass ratio of 1: 0.2 of calcium sulphoaluminate expanding agent and silicone-acrylate emulsion;
the preparation method of the pre-dispersed polyacrylate modified mica powder copolymer solution comprises the following steps: according to the mass ratio of 1: 0.2: 0.06: 2, mixing polyacrylate and mica powder, and carrying out microwave heating polymerization reaction, wherein the microwave frequency of the microwave heating polymerization is 4000MHZ, the microwave heating polymerization time is 2min, after the microwave heating polymerization, adding an initiator and a dispersant under the condition of supercritical carbon dioxide, and carrying out copolymerization reaction, wherein the temperature of the copolymerization reaction is 50 ℃, and the time of the copolymerization reaction is 30min, so as to obtain pre-dispersed polyacrylate modified mica powder copolymer feed liquid;
the preparation method of the water-based concrete comprises the following steps: mixing cement, fly ash, slag powder, sand and gravel, carrying out dry mixing shearing, carrying out dry mixing for 2h at 30-35 ℃, then shearing for 2-4h at 30-35 ℃ at 300r/min, adding an additive and water for wet mixing shearing at a heating rate of 0.5 ℃/min while heating to 40-50 ℃ and shearing at 300r/min, adding an expanding agent for stirring after wet mixing shearing, injecting into a mold, and curing to prepare the water-based concrete.
Example 3
The water-based concrete with improved durability comprises the following raw materials in parts by weight: 320kg of cement, 35kg of fly ash, 105kg of slag powder, 684kg of sand, 1030kg of macadam, 161kg of water, 16.6kg of additive and 35kg of expanding agent;
the admixture is prepared from the following components in percentage by mass 2: 9: 0.8 of tetrapod-like zinc oxide whiskers, pre-dispersed polyacrylate modified mica powder copolymer feed liquid and toughening fibers; wherein the toughening fibers are prepared from the following components in percentage by mass: 1, bamboo fiber and basalt fiber;
the expanding agent is prepared from the following components in a mass ratio of 1: 0.4 of calcium sulphoaluminate expanding agent and silicone-acrylate emulsion;
the preparation method of the pre-dispersed polyacrylate modified mica powder copolymer solution comprises the following steps: according to the mass ratio of 1: 0.2: 0.06: 2, mixing polyacrylate and mica powder, and carrying out microwave heating polymerization reaction, wherein the microwave frequency of the microwave heating polymerization is 4000MHZ, the microwave heating polymerization time is 2min, after the microwave heating polymerization, adding an initiator and a dispersant under the condition of supercritical carbon dioxide, and carrying out copolymerization reaction, wherein the temperature of the copolymerization reaction is 50 ℃, and the time of the copolymerization reaction is 30min, so as to obtain pre-dispersed polyacrylate modified mica powder copolymer feed liquid;
the preparation method of the water-based concrete comprises the following steps: mixing cement, fly ash, slag powder, sand and broken stone, carrying out dry mixing shearing, carrying out dry mixing for 2h at 30-35 ℃, then shearing for 2-4h at 30-35 ℃ at 300r/min, adding an additive and water for wet mixing shearing at a heating rate of 0.5 ℃/min while heating to 40-50 ℃, adding an expanding agent for stirring after wet mixing shearing, injecting into a mold, and curing to prepare the water-based concrete.
Example 4
The water-based concrete with improved durability comprises the following raw materials in parts by weight: 320kg of cement, 35kg of fly ash, 105kg of slag powder, 684kg of sand, 1030kg of macadam, 161kg of water, 16.6kg of additive and 35kg of expanding agent;
the admixture is prepared from the following components in percentage by mass 2: 9: 0.8 of tetrapod-like zinc oxide whiskers, pre-dispersed polyacrylate modified mica powder copolymer feed liquid and toughening fibers; wherein the toughening fibers are prepared from the following components in percentage by mass: 1, bamboo fiber and carbon fiber;
the expanding agent is prepared from the following components in a mass ratio of 1: 0.4 of calcium sulphoaluminate expanding agent and silicone-acrylate emulsion;
the preparation method of the pre-dispersed polyacrylate modified mica powder copolymer solution comprises the following steps: according to the mass ratio of 1: 0.3: 0.07: 2.2, mixing polyacrylate and mica powder, and carrying out microwave heating polymerization reaction, wherein the microwave frequency of the microwave heating polymerization is 5000MHZ, the microwave heating polymerization time is 4min, after the microwave heating polymerization, adding an initiator and a dispersant under the condition of supercritical carbon dioxide, and carrying out copolymerization reaction, wherein the temperature of the copolymerization reaction is 55 ℃, and the time of the copolymerization reaction is 40min, so as to obtain pre-dispersed polyacrylate modified mica powder copolymer feed liquid;
the preparation method of the water-based concrete comprises the following steps: mixing cement, fly ash, slag powder, sand and gravel, carrying out dry mixing shearing, carrying out dry mixing for 3h at 30-35 ℃, then shearing for 3h at 1200r/min at 30-35 ℃, adding an additive and water for wet mixing shearing after dry mixing shearing, carrying out shearing at 400r/min while heating to 40-50 ℃ at the heating rate of 1 ℃/min, adding an expanding agent for stirring after wet mixing shearing, injecting into a mold, and maintaining to prepare the water-based concrete.
Example 5
The water-based concrete with improved durability comprises the following raw materials in parts by weight: 320kg of cement, 35kg of fly ash, 105kg of slag powder, 684kg of sand, 1030kg of macadam, 161kg of water, 16.6kg of additive and 35kg of expanding agent;
the admixture is prepared from the following components in percentage by mass 2: 7: 0.7 of tetrapod-like zinc oxide whiskers, pre-dispersed polyacrylate modified mica powder copolymer feed liquid and toughening fibers; wherein the toughening fiber is prepared from the following components in percentage by mass 1: 1, bamboo fiber and carbon fiber;
the expanding agent is prepared from the following components in a mass ratio of 1: 0.3 of calcium sulphoaluminate expanding agent and silicone-acrylate emulsion;
the preparation method of the pre-dispersed polyacrylate modified mica powder copolymer solution comprises the following steps: according to the mass ratio of 1: 0.3: 0.07: 2.2, mixing polyacrylate and mica powder, and carrying out microwave heating polymerization reaction, wherein the microwave frequency of the microwave heating polymerization is 5000MHZ, the microwave heating polymerization time is 4min, after the microwave heating polymerization, adding an initiator and a dispersant under the condition of supercritical carbon dioxide, and carrying out copolymerization reaction, wherein the temperature of the copolymerization reaction is 55 ℃, and the time of the copolymerization reaction is 40min, so as to obtain pre-dispersed polyacrylate modified mica powder copolymer feed liquid;
the preparation method of the water-based concrete comprises the following steps: mixing cement, fly ash, slag powder, sand and gravel, carrying out dry mixing shearing, carrying out dry mixing for 3h at 30-35 ℃, then shearing for 3h at 1200r/min at 30-35 ℃, adding an additive and water for wet mixing shearing after dry mixing shearing, carrying out shearing at 400r/min while heating to 40-50 ℃ at the heating rate of 1 ℃/min, adding an expanding agent for stirring after wet mixing shearing, injecting into a mold, and maintaining to prepare the water-based concrete.
Comparative example 1
The difference between the comparative example and the example 5 is that the dosage of the admixture is different, and the specific steps are as follows:
320kg of cement, 35kg of fly ash, 105kg of slag powder, 684kg of sand, 1030kg of macadam, 161kg of water, 30kg of additive and 35kg of expanding agent;
the admixture is prepared from the following components in percentage by mass 2: 7: 0.7 of tetrapod-like zinc oxide whiskers, pre-dispersed polyacrylate modified mica powder copolymer feed liquid and toughening fibers; wherein the toughening fibers are prepared from the following components in percentage by mass: 1, bamboo fiber and carbon fiber;
the expanding agent is prepared from the following components in a mass ratio of 1: 0.3 of calcium sulphoaluminate expanding agent and silicone-acrylate emulsion;
the preparation method of the pre-dispersed polyacrylate modified mica powder copolymer solution comprises the following steps: according to the mass ratio of 1: 0.3: 0.07: 2.2, mixing polyacrylate and mica powder, and carrying out microwave heating polymerization reaction, wherein the microwave frequency of the microwave heating polymerization is 5000MHZ, the microwave heating polymerization time is 4min, after the microwave heating polymerization, adding an initiator and a dispersant under the condition of supercritical carbon dioxide, and carrying out copolymerization reaction, wherein the temperature of the copolymerization reaction is 55 ℃, and the time of the copolymerization reaction is 40min, so as to obtain pre-dispersed polyacrylate modified mica powder copolymer feed liquid;
the preparation method of the water-based concrete comprises the following steps: mixing cement, fly ash, slag powder, sand and gravel, carrying out dry mixing shearing, carrying out dry mixing for 3h at 30-35 ℃, then shearing for 3h at 1200r/min at 30-35 ℃, adding an additive and water for wet mixing shearing after dry mixing shearing, carrying out shearing at 400r/min while heating to 40-50 ℃ at the heating rate of 1 ℃/min, adding an expanding agent for stirring after wet mixing shearing, injecting into a mold, and maintaining to prepare the water-based concrete.
Comparative example 2
The comparative example is different from example 5 in that the tetrapod-like zinc oxide whiskers in the admixture are replaced by silicon carbide whiskers by the following specific steps:
320kg of cement, 35kg of fly ash, 105kg of slag powder, 684kg of sand, 1030kg of macadam, 161kg of water, 16.6kg of additive and 35kg of expanding agent;
the admixture is prepared from the following components in percentage by mass 2: 7: 0.7 of silicon carbide crystal whisker, pre-dispersed polyacrylate modified mica powder copolymer feed liquid and toughened fiber; wherein the toughening fibers are prepared from the following components in percentage by mass: 1, bamboo fiber and carbon fiber;
the expanding agent is prepared from the following components in a mass ratio of 1: 0.3 of calcium sulphoaluminate expanding agent and silicone-acrylate emulsion;
the preparation method of the pre-dispersed polyacrylate modified mica powder copolymer feed liquid comprises the following steps: according to the mass ratio of 1: 0.3: 0.07: 2.2, mixing polyacrylate and mica powder, and carrying out microwave heating polymerization reaction, wherein the microwave frequency of the microwave heating polymerization is 5000MHZ, the microwave heating polymerization time is 4min, after the microwave heating polymerization, adding an initiator and a dispersing agent under the condition of supercritical carbon dioxide, and carrying out copolymerization reaction at the temperature of 55 ℃ for 40min to obtain pre-dispersed polyacrylate modified mica powder copolymer feed liquid;
the preparation method of the water-based concrete comprises the following steps: mixing cement, fly ash, slag powder, sand and gravel, carrying out dry mixing shearing, carrying out dry mixing for 3h at 30-35 ℃, then shearing for 3h at 1200r/min at 30-35 ℃, adding an additive and water for wet mixing shearing after dry mixing shearing, carrying out shearing at 400r/min while heating to 40-50 ℃ at the heating rate of 1 ℃/min, adding an expanding agent for stirring after wet mixing shearing, injecting into a mold, and maintaining to prepare the water-based concrete.
Comparative example 3
The difference between the comparative example and the example 5 is that the pre-dispersed polyacrylate modified mica powder copolymer feed liquid in the admixture is replaced by the pre-dispersed polyurethane modified mica powder copolymer feed liquid, and the concrete steps are as follows:
320kg of cement, 35kg of fly ash, 105kg of slag powder, 684kg of sand, 1030kg of macadam, 161kg of water, 16.6kg of additive and 35kg of expanding agent;
the admixture is prepared from the following components in percentage by mass 2: 7: 0.7 of tetrapod-like zinc oxide whiskers, pre-dispersed polyurethane modified mica powder copolymer feed liquid and toughening fibers; wherein the toughening fibers are prepared from the following components in percentage by mass: 1, bamboo fiber and carbon fiber;
the expanding agent is prepared from the following components in a mass ratio of 1: 0.3 of calcium sulphoaluminate expanding agent and silicone-acrylate emulsion;
the preparation method of the pre-dispersed polyurethane modified mica powder copolymer solution comprises the following steps: according to the mass ratio of 1: 0.3: 0.07: 2.2, mixing polyurethane and mica powder, and carrying out microwave heating polymerization reaction, wherein the microwave frequency of the microwave heating polymerization is 5000MHZ, the microwave heating polymerization time is 4min, after the microwave heating polymerization, adding an initiator and a dispersant under the condition of supercritical carbon dioxide, and carrying out copolymerization reaction, wherein the temperature of the copolymerization reaction is 55 ℃, and the time of the copolymerization reaction is 40min, so as to obtain pre-dispersed polyurethane modified mica powder copolymer feed liquid;
the preparation method of the water-based concrete comprises the following steps: mixing cement, fly ash, slag powder, sand and gravel, carrying out dry mixing shearing, carrying out dry mixing for 3h at 30-35 ℃, then shearing for 3h at 1200r/min at 30-35 ℃, adding an additive and water for wet mixing shearing after dry mixing shearing, carrying out shearing at 400r/min while heating to 40-50 ℃ at the heating rate of 1 ℃/min, adding an expanding agent for stirring after wet mixing shearing, injecting into a mold, and maintaining to prepare the water-based concrete.
The concrete materials of examples 1 to 5 and comparative examples 1 to 3 were tested according to the test standards, and the results are shown in the following table:
| item | Hydration temperature rise/deg.C | 3d Heat of hydration/J.g -1 | Number of impacts S 1 | Number of impacts S 2 | Energy of breaking impact W 2 |
| Example 1 | 12.2 | 262.1 | 8 | 22 | 2156 |
| Example 2 | 13.0 | 295.3 | 8 | 24 | 2352 |
| Example 3 | 12.3 | 252.2 | 9 | 30 | 2940 |
| Example 4 | 12.5 | 280.8 | 7 | 28 | 2744 |
| Example 5 | 12.8 | 276.7 | 8 | 29 | 2842 |
| Comparative example 1 | 12.9 | 180.8 | 5 | 12 | 1176 |
| Comparative example 2 | 15.8 | 359.5 | 9 | 20 | 1960 |
| Comparative example 3 | 17.5 | 392.9 | 6 | 13 | 1274 |
As is clear from the above table, the hydration heat in examples 1 to 4 of the present invention is 252.2 to 295.3 J.g -1 The raw materials of the pervious concrete are used as base materials, tetrapod-shaped zinc oxide whiskers, pre-dispersed polyacrylate modified mica powder copolymer liquid and toughening fibers are respectively matched as additives, calcium sulphoaluminate expanding agent and silicone-acrylate emulsion are used as expanding agents and added into the base materials, the proportion is scientific, a large amount of heat released by hydration heat reaction is effectively slowed down, the microstructure of the concrete is prevented from being damaged, more energy is absorbed before damage, the integrity of the concrete is improved, the development and combination of microcracks are favorably reduced, the time of complete damage of the structure is prolonged, and the durability of the water-based concrete is further improved.
Compared with the comparative example 1, the embodiment 5 has the advantages that the use amount of the additive is controlled according to a certain proportion, the early hydration process can be delayed, the full hydration of the material is promoted, and the strength of the concrete in the middle and later periods is improved; the tetrapod-like zinc oxide whiskers, the pre-dispersed polyurethane modified mica powder copolymer feed liquid and the toughening fibers are added excessively, so that the surface area of a hydration product is reduced, the reaction rate is slowed, the hydration reaction time is prolonged, the adhesion among materials is reduced, and the impact resistance is reduced.
Compared with the comparative example 2, the example 5 shows that the tetrapod-like zinc oxide whiskers are replaced by silicon carbide whiskers, the hydration heat is higher, and the damage impact energy is lower, which shows that the tetrapod-like zinc oxide whiskers can avoid concentrated heat release of early hydration, reduce micro-cracks formed by a large amount of hydration heat, improve the distribution uniformity of hydration products, and contribute to improving the absorption degree of a system on the damage impact energy; although the silicon carbide whisker can improve the early strength of the concrete, the micro-crack formed by hydration heat can relatively quickly damage the porous concrete, and the silicon carbide whisker does not greatly improve the later strength of the concrete.
Compared with the comparative example 3, the embodiment 5 shows that although polyurethane is polar resin, the pre-dispersed polyurethane modified mica powder copolymer feed liquid prepared by adopting polyurethane has higher hydration heat, the pre-dispersed polyacrylate modified mica powder copolymer feed liquid prepared by adopting polyacrylate has stronger dispersion effect than the polyurethane modified mica powder copolymer feed liquid, and is combined with the tetrapod-shaped zinc oxide crystals, so that a partial interactive net-shaped three-dimensional structure can be formed with hydration products, the hydration degree can be effectively adjusted, the workability of concrete is improved, meanwhile, an effective 'occlusion' effect is formed between the pre-dispersed polyacrylate modified mica powder copolymer feed liquid and the materials, the further dislocation of the structure is avoided, the development and combination of internal microcracks are prevented, and the absorption degree of the impact capacity of the concrete is improved.
Example 6
The difference between the comparative example and the example 5 is that the preparation method of the pre-dispersed polyacrylate modified mica powder copolymer solution is different, and the specific steps are as follows:
320kg of cement, 35kg of fly ash, 105kg of slag powder, 684kg of sand, 1030kg of macadam, 161kg of water, 16.6kg of additive and 35kg of expanding agent;
the admixture is prepared from the following components in percentage by mass 2: 7: 0.7 of tetrapod-like zinc oxide whiskers, pre-dispersed polyacrylate modified mica powder copolymer feed liquid and toughening fibers; wherein the toughening fiber is prepared from the following components in percentage by mass 1: 1, bamboo fiber and carbon fiber;
the expanding agent is prepared from the following components in a mass ratio of 1: 0.3 of calcium sulphoaluminate expanding agent and silicone-acrylate emulsion;
the preparation method of the pre-dispersed polyacrylate modified mica powder copolymer solution comprises the following steps: according to the mass ratio of 1: 0.3: 0.07: 2.2, mixing polyacrylate and mica powder, carrying out ultrasonic treatment, wherein the frequency of the ultrasonic treatment is 60KHz, the power of the ultrasonic treatment is 1000W, the time of the ultrasonic treatment is 4min, adding an initiator and a dispersing agent under the condition of supercritical carbon dioxide after the ultrasonic treatment, carrying out copolymerization reaction, wherein the temperature of the copolymerization reaction is 55 ℃, and the time of the copolymerization reaction is 40min, thus obtaining the pre-dispersed polyacrylate modified mica powder copolymer feed liquid
The preparation method of the water-based concrete comprises the following steps: mixing cement, fly ash, slag powder, sand and gravel, carrying out dry mixing shearing, carrying out dry mixing for 3h at 30-35 ℃, then shearing for 3h at 1200r/min at 30-35 ℃, adding an additive and water for wet mixing shearing after dry mixing shearing, carrying out shearing at 400r/min while heating to 40-50 ℃ at the heating rate of 1 ℃/min, adding an expanding agent for stirring after wet mixing shearing, injecting into a mold, and maintaining to prepare the water-based concrete.
The concrete materials of examples 4 to 6 were tested according to the test standards and the results are shown in the following table:
| item | Permeability coefficient/mm.s -1 | Compressive strength/MPa | Durability index | Carbonization depth/mm |
| Example 4 | 8.5 | 73.2 | 125 | 23.6 |
| Example 5 | 8.1 | 75.8 | 133 | 26.5 |
| Example 6 | 8.8 | 68.2 | 110 | 20.8 |
As can be seen from the above table, the water permeability coefficient and the compressive strength of the aqueous concrete in examples 4 and 5 are good, and the durability index and the carbonization depth value are high, as compared with example 6, it is known that the pre-dispersed polyacrylate modified mica powder copolymer feed liquid obtained by sequentially performing microwave heating polymerization and carbon dioxide copolymerization reactions by using polyacrylate, mica powder, an initiator and a dispersant is high in copolymerization degree, and active groups of the copolymer are easily combined and exchanged with free ions of hydration products in a hydration reaction, so that an effective "bridging" effect is formed, the dispersion degree of energy absorption is facilitated, the stress state inside the concrete is adjusted, the development, extension and combination of microcracks are prevented, and the durability of the aqueous concrete is improved.
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 (10)
1. The water-based concrete with improved durability is characterized by comprising the following raw materials in parts by weight: 300-340 parts of cement, 25-45 parts of fly ash, 90-120 parts of slag powder, 660-700 parts of sand, 1000-1060 parts of broken stone, 140-180 parts of water, 14-18 parts of an additive and 30-40 parts of an expanding agent;
the admixture is prepared from the following components in a mass ratio of 1-2: 6-9: 0.6-0.8 of tetrapod-like zinc oxide whiskers, pre-dispersed polyacrylate modified mica powder copolymer feed liquid and toughening fibers.
2. The water-based concrete with improved durability according to claim 1 is characterized by comprising the following raw materials in parts by weight: 320 parts of cement, 35 parts of fly ash, 105 parts of slag powder, 684 parts of sand, 1030 parts of broken stone, 161 parts of water, 16.6 parts of an additive and 35 parts of an expanding agent;
the admixture is prepared from the following components in percentage by mass 2: 7: 0.7 of tetrapod-like zinc oxide whiskers, pre-dispersed polyacrylate modified mica powder copolymer feed liquid and toughening fibers.
3. The durability-improved water-based concrete according to claim 1 or 2, which is characterized by comprising the following raw materials in parts by weight: the expanding agent is prepared from the following components in a mass ratio of 1: 0.2-0.4 of calcium sulphoaluminate expanding agent and silicone-acrylate emulsion; the toughening fiber is at least one of bamboo fiber, carbon fiber, basalt fiber or steel fiber.
4. The water-based concrete with improved durability according to claim 1 or 2, wherein the preparation method of the pre-dispersed polyacrylate modified mica powder copolymer solution comprises the following steps: mixing polyacrylate and mica powder, heating by microwave for polymerization, adding an initiator and a dispersant under the condition of supercritical carbon dioxide, and carrying out copolymerization reaction to obtain pre-dispersed polyacrylate modified mica powder copolymer feed liquid;
the mass ratio of the polyacrylate, the mica powder, the initiator and the dispersant is 1: 0.2-0.4: 0.06-0.08: 2-2.5.
5. The water-based concrete for improving durability as claimed in claim 4, wherein the microwave frequency of the microwave heating polymerization is 4000-6000MHZ, and the time of the microwave heating polymerization is 2-5 min; the temperature of the copolymerization reaction is 50-60 ℃, and the time of the copolymerization reaction is 30-50 min.
6. The method for preparing the water-based concrete with improved durability according to any one of claims 1 to 5, characterized in that cement, fly ash, slag powder, sand and crushed stone are mixed, dry-mixed and sheared, an additive and water are added for wet-mixed shearing, an expanding agent is added for stirring, and the mixture is injected into a mold and cured to prepare the water-based concrete.
7. The method for preparing aqueous concrete with improved durability according to claim 6, wherein the dry shearing is: dry mixing at 30-35 deg.C for 2-4 hr, and shearing at 30-35 deg.C for 2-4 hr; the shear rate is 300-1200 r/min.
8. The method of claim 6, wherein the wet mixing shear is: shearing while heating to 40-50 deg.C.
9. The method for preparing aqueous concrete for improving durability according to claim 8, wherein the heating rate is 0.5 to 1 ℃/min; the shear rate is 300-400 r/min.
10. An application of water-based concrete with improved durability in large-area pavement construction in sponge cities.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210606441.0A CN115010430A (en) | 2022-05-31 | 2022-05-31 | Water-based concrete with improved durability and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210606441.0A CN115010430A (en) | 2022-05-31 | 2022-05-31 | Water-based concrete with improved durability and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115010430A true CN115010430A (en) | 2022-09-06 |
Family
ID=83071736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210606441.0A Pending CN115010430A (en) | 2022-05-31 | 2022-05-31 | Water-based concrete with improved durability and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115010430A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115819043A (en) * | 2022-12-14 | 2023-03-21 | 武汉金中海高新科技有限公司 | Mixed fiber reinforced concrete waterproof material and preparation method thereof |
| CN115893943A (en) * | 2022-11-23 | 2023-04-04 | 湖北城涛建材有限公司 | Post-doped aggregate anti-seismic green premixed concrete and preparation process thereof |
| CN115894073A (en) * | 2022-09-26 | 2023-04-04 | 琼海鑫海混凝土有限公司 | Light foamed concrete and preparation method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070228612A1 (en) * | 2006-03-28 | 2007-10-04 | Durst Bartley P | Blast-resistant concrete also suitable for limiting penetration of ballistic fragments |
| CN106348691A (en) * | 2016-08-26 | 2017-01-25 | 盼石（上海）新材料科技股份有限公司 | Long-life permeable concrete and production method thereof |
| CN108609953A (en) * | 2018-05-21 | 2018-10-02 | 西南交通大学 | A kind of anti-folding, abrasion-proof concrete for prestressing force assembled road surface |
| CN109455979A (en) * | 2018-12-13 | 2019-03-12 | 河北曲寨矿峰水泥股份有限公司 | A kind of water-repellent modified cement and preparation method thereof |
| CN109503208A (en) * | 2018-11-19 | 2019-03-22 | 青岛崇置混凝土工程有限公司 | High-intensitive pervious concrete and preparation method thereof |
| CN109626906A (en) * | 2018-12-29 | 2019-04-16 | 上海练定混凝土制品有限公司 | A kind of water-tight concrete and its preparation process |
| CN112010603A (en) * | 2020-08-18 | 2020-12-01 | 湖州上建混凝土有限公司 | High-water-permeability concrete and preparation method thereof |
-
2022
- 2022-05-31 CN CN202210606441.0A patent/CN115010430A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070228612A1 (en) * | 2006-03-28 | 2007-10-04 | Durst Bartley P | Blast-resistant concrete also suitable for limiting penetration of ballistic fragments |
| CN106348691A (en) * | 2016-08-26 | 2017-01-25 | 盼石（上海）新材料科技股份有限公司 | Long-life permeable concrete and production method thereof |
| CN108609953A (en) * | 2018-05-21 | 2018-10-02 | 西南交通大学 | A kind of anti-folding, abrasion-proof concrete for prestressing force assembled road surface |
| CN109503208A (en) * | 2018-11-19 | 2019-03-22 | 青岛崇置混凝土工程有限公司 | High-intensitive pervious concrete and preparation method thereof |
| CN109455979A (en) * | 2018-12-13 | 2019-03-12 | 河北曲寨矿峰水泥股份有限公司 | A kind of water-repellent modified cement and preparation method thereof |
| CN109626906A (en) * | 2018-12-29 | 2019-04-16 | 上海练定混凝土制品有限公司 | A kind of water-tight concrete and its preparation process |
| CN112010603A (en) * | 2020-08-18 | 2020-12-01 | 湖州上建混凝土有限公司 | High-water-permeability concrete and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 王东升等: "《建设工程现代施工技术 二级建造师》", 30 September 2012, 徐州：中国矿业大学出版社, pages: 298 - 299 * |
| 郑超荣: "《土建工程材料标准速查与选用指南》", 北京：中国建材工业出版社, pages: 82 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115894073A (en) * | 2022-09-26 | 2023-04-04 | 琼海鑫海混凝土有限公司 | Light foamed concrete and preparation method thereof |
| CN115894073B (en) * | 2022-09-26 | 2023-09-22 | 琼海鑫海混凝土有限公司 | Lightweight foamed concrete and preparation method thereof |
| CN115893943A (en) * | 2022-11-23 | 2023-04-04 | 湖北城涛建材有限公司 | Post-doped aggregate anti-seismic green premixed concrete and preparation process thereof |
| CN115893943B (en) * | 2022-11-23 | 2023-09-12 | 湖北城涛建材有限公司 | Post-aggregate-doped anti-seismic green ready-mixed concrete and preparation process thereof |
| CN115819043A (en) * | 2022-12-14 | 2023-03-21 | 武汉金中海高新科技有限公司 | Mixed fiber reinforced concrete waterproof material and preparation method thereof |
| CN115819043B (en) * | 2022-12-14 | 2023-06-09 | 武汉金中海高新科技有限公司 | Mixed fiber reinforced concrete waterproof material and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN115010430A (en) | Water-based concrete with improved durability and preparation method thereof | |
| CN105503052B (en) | A kind of anti-cracking type high performance concrete and preparation method thereof | |
| CN109456008A (en) | A kind of freeze proof anti-crack concrete and preparation method thereof | |
| CN109592950B (en) | Heat-resistant cement-based grouting material and preparation method thereof | |
| CN113087460B (en) | Environment-friendly anti-freezing concrete and preparation method thereof | |
| KR102133437B1 (en) | Crack inhibition type latex modified ultra rapid harding cement concrete compositions and repairing method of road pavement using the same | |
| CN105130335A (en) | Low shrinkage anti-cracking C60 grade self-compacting bridge tower concrete based on internal curing, shrinkage compensating and toughening, and preparation method thereof | |
| CN106116349B (en) | Concrete material capable of shortening final setting time and preparation method and application thereof | |
| CN103626449B (en) | A kind of frost-resistant concrete and preparation method thereof | |
| CN110550914A (en) | high-strength concrete and preparation method thereof | |
| CN110467407A (en) | A kind of C70 mass concrete and its preparation process | |
| CN105060791A (en) | C60 self-compacting shrinkage-compensating anti-crack concrete suitable for steel anchor beam cable tower anchoring structure and preparation method of concrete | |
| CN106278102B (en) | A kind of method and its product carrying out gypsum toughening using nickel slag | |
| CN104058695A (en) | Gravity mortar for sound barrier quick filling and preparation method thereof | |
| CN108793935A (en) | Prefabricated siccative gunite concrete | |
| CN113354334A (en) | Composite fiber anti-cracking agent | |
| CN113563034A (en) | Normal-temperature-cured fireproof ultrahigh-performance concrete and preparation method thereof | |
| CN110627461B (en) | Ultrahigh-performance concrete applied to high-cold area and preparation method thereof | |
| CN114671644B (en) | High-early-strength low-resilience high-performance sprayed concrete and preparation method thereof | |
| CN111320436A (en) | Design and preparation method of carbon nanotube panel concrete mixing proportion | |
| CN110627473A (en) | Phosphorus-silicon-magnesium-based special rapid-hardening material and preparation method thereof | |
| CN111875301A (en) | Nano reinforcement method for recycled aggregate concrete and reinforced recycled aggregate obtained by nano reinforcement method | |
| CN113860834B (en) | Liquid regulator for super-dispersed, high-mud-resistance, high-foam-stability, low-shrinkage and reinforced autoclaved aerated concrete, and preparation method and application thereof | |
| CN113185222B (en) | Concrete for building reinforcement and preparation method and application thereof | |
| CN104909818B (en) | Method of the one kind using water-quenched manganese slag-coal ash for manufacturing for air entrained concrete |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |