CN113698170A - High-performance pervious concrete rapid repairing material and preparation method and application thereof - Google Patents
High-performance pervious concrete rapid repairing material and preparation method and application thereof Download PDFInfo
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- CN113698170A CN113698170A CN202111048603.5A CN202111048603A CN113698170A CN 113698170 A CN113698170 A CN 113698170A CN 202111048603 A CN202111048603 A CN 202111048603A CN 113698170 A CN113698170 A CN 113698170A
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- 239000000463 material Substances 0.000 title claims abstract description 102
- 239000011380 pervious concrete Substances 0.000 title claims abstract description 61
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 69
- 230000008439 repair process Effects 0.000 claims abstract description 44
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 238000000034 method Methods 0.000 claims abstract description 24
- 239000000843 powder Substances 0.000 claims abstract description 21
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000004593 Epoxy Substances 0.000 claims abstract description 18
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 18
- 239000011707 mineral Substances 0.000 claims abstract description 18
- 229920005989 resin Polymers 0.000 claims abstract description 18
- 239000011347 resin Substances 0.000 claims abstract description 18
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims abstract description 18
- 229920002554 vinyl polymer Polymers 0.000 claims abstract description 18
- 239000006004 Quartz sand Substances 0.000 claims abstract description 17
- 238000002156 mixing Methods 0.000 claims abstract description 15
- 239000004575 stone Substances 0.000 claims abstract description 15
- 239000004115 Sodium Silicate Substances 0.000 claims abstract description 14
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 14
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims abstract description 14
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 claims abstract description 14
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910052911 sodium silicate Inorganic materials 0.000 claims abstract description 14
- 239000010410 layer Substances 0.000 claims abstract description 12
- 239000000203 mixture Substances 0.000 claims abstract description 12
- 238000011049 filling Methods 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 10
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims abstract description 7
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims abstract description 7
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000001110 calcium chloride Substances 0.000 claims abstract description 7
- 229910001628 calcium chloride Inorganic materials 0.000 claims abstract description 7
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims abstract description 7
- 235000010288 sodium nitrite Nutrition 0.000 claims abstract description 7
- 229910052938 sodium sulfate Inorganic materials 0.000 claims abstract description 7
- 235000011152 sodium sulphate Nutrition 0.000 claims abstract description 7
- 238000005507 spraying Methods 0.000 claims abstract description 7
- 235000011148 calcium chloride Nutrition 0.000 claims abstract description 4
- 239000002344 surface layer Substances 0.000 claims abstract description 4
- 238000004381 surface treatment Methods 0.000 claims abstract description 3
- 238000003756 stirring Methods 0.000 claims description 18
- 239000002245 particle Substances 0.000 claims description 10
- 239000013078 crystal Substances 0.000 claims description 4
- 239000000428 dust Substances 0.000 claims description 2
- 238000007667 floating Methods 0.000 claims description 2
- 239000004567 concrete Substances 0.000 abstract description 33
- 230000008569 process Effects 0.000 abstract description 6
- 238000011161 development Methods 0.000 abstract description 4
- 235000019794 sodium silicate Nutrition 0.000 abstract 1
- 229920000876 geopolymer Polymers 0.000 description 12
- 230000035699 permeability Effects 0.000 description 11
- 238000012360 testing method Methods 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 10
- 230000001070 adhesive effect Effects 0.000 description 4
- 239000004568 cement Substances 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- 239000004354 Hydroxyethyl cellulose Substances 0.000 description 3
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 239000002518 antifoaming agent Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 229910021487 silica fume Inorganic materials 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 239000003349 gelling agent Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 239000012779 reinforcing material Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 241001523486 Poncirus Species 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- CQBLUJRVOKGWCF-UHFFFAOYSA-N [O].[AlH3] Chemical compound [O].[AlH3] CQBLUJRVOKGWCF-UHFFFAOYSA-N 0.000 description 1
- OBNDGIHQAIXEAO-UHFFFAOYSA-N [O].[Si] Chemical compound [O].[Si] OBNDGIHQAIXEAO-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000006068 polycondensation reaction Methods 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000007847 structural defect 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
- C04B28/24—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 alkyl, ammonium or metal silicates; containing silica sols
- C04B28/26—Silicates of the alkali metals
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C11/00—Details of pavings
- E01C11/22—Gutters; Kerbs ; Surface drainage of streets, roads or like traffic areas
- E01C11/224—Surface drainage of streets
- E01C11/225—Paving specially adapted for through-the-surfacing drainage, e.g. perforated, porous; Preformed paving elements comprising, or adapted to form, passageways for carrying off drainage
- E01C11/226—Coherent pavings
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/10—Coherent pavings made in situ made of road-metal and binders of road-metal and cement or like binders
- E01C7/14—Concrete paving
- E01C7/147—Repairing concrete pavings, e.g. joining cracked road sections by dowels, applying a new concrete covering
-
- 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
- C04B2111/00008—Obtaining or using nanotechnology related materials
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/72—Repairing or restoring existing buildings or building materials
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Ceramic Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Road Repair (AREA)
Abstract
The invention relates to the technical field of concrete pavement repair, in particular to a high-performance pervious concrete rapid repair material and a preparation method and application thereof. The high-performance pervious concrete rapid repair material comprises the following raw materials: metakaolin, mineral powder, quartz sand, stones, nano calcium carbonate, calcium carbonate whiskers, sodium silicate, calcium chloride, sodium sulfate, sodium nitrite, triethanolamine, aluminum oxide and water; the invention also provides a method for road patching by the patching material, which comprises the steps of carrying out base surface treatment on a road surface to be patched; spraying epoxy vinyl resin and curing agent mixture on the surface layer of the repaired pavement; dividing the high-performance pervious concrete rapid repair material into A, B parts, mixing the A part and the accelerator, filling the mixture into the inner layer of the repaired pavement, filling the B part into the upper layer of the A part filling material, and maintaining; the invention overcomes the technical problems of low early strength, slow strength development process and the like of the existing pervious concrete material, and meets the technical requirement of rapid repair of the heavy-load pervious concrete road.
Description
Technical Field
The invention relates to the technical field of concrete pavement repair, in particular to a high-performance pervious concrete rapid repair material and a preparation method and application thereof.
Background
The wide application of the pervious concrete is an important part in the construction process of sponge cities in China. In recent years, with the increasing demand of municipal roads, public transportation stations, large bridges and tunnels and other pavements for high-grade permeable roads, high-performance permeable concrete with the compressive strength grade higher than C40 is paid more and more attention and applied. From the life cycle of a road, fatigue damage and damage inevitably occur to any road in the service process, and rapid repair of the road is very important in order to influence traffic as little as possible. But different from the quick repair of common concrete roads, the material suitable for the quick repair of heavy-load permeable roads needs to meet the following three basic requirements: (1) the water permeability is not lower than that of the original permeable concrete road; (2) the early strength (especially the strength within 6 hours) is developed rapidly, and the traffic sealing time is shortened as much as possible; (3) the later strength is not lower than that of the original pervious concrete road.
The materials which are already used for the cement concrete rush repair project at present mainly comprise high molecular polymers and double-quick cement. Although both of these materials can achieve the functions of quick setting and early strength, no heavy-duty permeable material is formed which can be used for rapid repair of permeable roads. In recent years, the geopolymer technology has been developed rapidly, and the geopolymer permeable concrete technology has been advanced sufficiently by utilizing the characteristics of quick setting and early strength of geopolymers, but there is still a great gap between the rapid repair of a heavy-load permeable concrete road and the rapid repair of the heavy-load permeable concrete road.
Patent CN105585261B discloses a geopolymer pervious concrete and a preparation method thereof. According to the method, coal gangue, slag and red mud are used as raw materials, and sodium hydroxide is used as an alkali activator, so that the geopolymer permeable concrete with the 28d compressive strength of 18-21 MPa is prepared, but obviously, the material cannot be used for quickly repairing a heavy-load permeable road.
Patent CN108675694A discloses a polymer pervious concrete with early strength and weather resistance and a preparation method thereof. Although the 3d compressive strength of the pervious concrete prepared by the method can reach more than 18MPa, the method still has a larger distance compared with the real rapid repair material suitable for the heavily loaded pervious concrete road because the strength development speed of the repair material is lower.
In addition, patent CN108314386A discloses an early strength type high strength pervious concrete material prepared by pervious concrete reinforcing agent, the 3d compressive strength of which can reach 18-26 MPa, but the material can not meet the rapid repair requirement of a heavy load pervious concrete road due to slow development of early strength.
Therefore, it is considered that there is still a need for a permeable material which is better suitable for rapid repair of heavily-loaded permeable concrete roads.
Disclosure of Invention
Based on the technical problems, the invention provides a high-performance pervious concrete rapid repairing material and a preparation method and application thereof. The technical problems of low early strength, slow strength development process and the like of the existing pervious concrete material are overcome, and the technical requirement of rapid repair of the heavy-load pervious concrete road is met.
According to one technical scheme, the high-performance pervious concrete rapid repairing material comprises the following raw materials in parts by mass: 12-18 parts of metakaolin, 14-20 parts of mineral powder, 12-15 parts of quartz sand, 100-110 parts of pebbles, 0.12-0.15 part of nano calcium carbonate, 2-5 parts of calcium carbonate whiskers, 8-12 parts of sodium silicate, 0.25-0.45 part of calcium chloride, 0.1-0.2 part of sodium sulfate, 0.05-0.1 part of sodium nitrite, 0.03-0.06 part of triethanolamine, 0.05-0.08 part of aluminum oxide and 13-15 parts of water.
Further, the metakaolin has an average particle size of 5 to E10um, specific surface area not less than 750m2Per kg; the average particle size of the mineral powder is 10-15 um, and the specific surface area is not less than 525m2Per kg; the average grain size of the quartz sand is 630um, and the quartz sand is continuously graded; the stones are made of basalt, have the grain size of 4.75 mm-9.5 mm and are continuously graded; the calcium carbonate crystal whisker is aragonite, the diameter is 1-2 um, and the length is 20-30 um; the sodium silicate is powder, and the modulus is 1; the average particle size of the nano calcium carbonate is 10-100 nm.
According to the second technical scheme, the preparation method of the high-performance pervious concrete rapid repairing material comprises the following steps:
mixing and stirring 1-2 parts of calcium chloride, sodium sulfate, sodium nitrite, triethanolamine, aluminum oxide and water to obtain a material A;
mixing and stirring metakaolin, mineral powder, sodium silicate, calcium carbonate whiskers, nano calcium carbonate and 11-13 parts of water to obtain a material B;
and mixing and stirring the quartz sand, the pebbles, the material A and the material B to obtain the high-performance pervious concrete rapid repairing material.
According to the third technical scheme, the high-performance pervious concrete rapid repairing material is applied to road repairing.
Further, the road is a heavy-load permeable road.
The fourth technical scheme of the invention is a method for repairing a road by using the high-performance pervious concrete rapid repairing material.
Further, the road repairing method comprises the following steps:
(1) carrying out base surface treatment on the road surface to be repaired to remove surface dirt and floating dust;
(2) spraying epoxy vinyl resin and curing agent mixture on the surface layer of the repaired pavement processed in the step (1);
(3) the high-performance pervious concrete rapid repairing material is divided into A, B parts according to the total usage amount, wherein the A part and the accelerator are mixed and filled in the inner layer of the repaired pavement, the B part is filled in the upper layer of the A part filling material, and the repairing material is maintained for 3h-28 days.
Further, the step (1) also comprises polishing the uneven part of the base surface; the mass ratio of the epoxy vinyl resin to the curing agent in the mixture of the epoxy vinyl resin and the curing agent in the step (2) is 5: (1-3) the spraying thickness is 0.5-1 cm.
Further, in the step (3), A, B is added in a volume ratio of 1: (3-5); the mass ratio of the accelerator to the epoxy vinyl resin is (4-5): 5.
further, the high-performance pervious concrete rapid repair material in the step (3) is preheated to 30-60 ℃ before filling, and the curing is specifically normal-temperature curing after steam curing for 3-5 hours.
The technical principle of the invention is as follows:
the basic principle of the invention is as follows: the metakaolin and the superfine mineral powder can be quickly hydrated and condensed to form a gel structure consisting of silicon-oxygen tetrahedron and aluminum-oxygen tetrahedron under the excitation of the sodium silicate solution, and on the basis, the invention further realizes the purposes of ultra-early strength and ultra-high strength of the polymer pervious concrete, and is optimized and innovated from the following aspects:
firstly, the invention further accelerates the polycondensation process of the geopolymer by introducing calcium chloride, sodium sulfate, sodium nitrite, aluminum oxide and triethanolamine, thereby obviously improving the early-age strength of the geopolymer gelled material. Secondly, the nano calcium carbonate is a nano reinforcing material, and the early strength of the geopolymer cementing material can be further improved through a nano effect; the calcium carbonate crystal whisker is a micron-sized reinforcing material with excellent mechanical property, and after the matrix strength of the cementing material is formed, the later strength of the geopolymer cementing material can be effectively improved through a microscopic reinforcing effect; meanwhile, researches find that the reinforcing effect of the calcium carbonate whiskers in the geopolymer hardening matrix is nearly twice of the effect of the calcium carbonate whiskers in the ordinary cement hardening matrix, which is an important reason for introducing the calcium carbonate whiskers in the invention and also provides a new idea for the application of the calcium carbonate whiskers in the field of building materials. In addition, for pervious concrete, the effective coating of the slurry on the aggregate is a necessary premise for the pervious concrete to form high strength, and the introduction of the nano calcium carbonate and the calcium carbonate whiskers can effectively improve the consistency of the geopolymer cementing material and improve the coating quality of the slurry on stones, so that a gain effect is further generated on the strength of the material. Finally, by introducing a proper amount of fine quartz sand, the total amount of the geopolymer mixed mortar between the double-concave bonding surfaces formed by the mutual contact of the stones can be increased, the bonding area between the stones is enlarged, and the structural defects of bonding parts of the stones are reduced, so that the overall strength of the designed pervious concrete is effectively improved.
Based on the technical principle, the super early strength and super high strength of the polymer pervious concrete can be realized, so that the high-performance pervious concrete material which can be really used for fast repairing of heavy haul roads is prepared.
Further, based on the characteristics of early strength and ultrahigh strength of the high-performance pervious concrete rapid repair material, in order to enhance the bonding property with the original pavement material when the high-performance pervious concrete rapid repair material is used for road repair, improve the durability of the repair material and avoid the problem of later falling, the invention also provides a road repair method based on the high-performance pervious concrete rapid repair material, in particular, the filling work of the repairing material is carried out after the epoxy resin and the curing agent are sprayed on the road surface to be repaired, the organic adhesive material layer is additionally arranged between the original pavement material and the patching material, so that the patching material and the pavement have better adhesive property through the adhesive effect of the epoxy resin on one hand, and the organic adhesive material layer plays the role of a buffer layer on the other hand, the contact toughness between the original pavement and inorganic cementing materials such as a repair material can be improved to a certain extent, so that the repaired pavement has better durability. In the technical scheme of the invention, the patching material is divided into two parts, wherein one part is directly contacted with the surface layer of the pavement sprayed with the epoxy vinyl resin and the curing agent after being doped with a proper amount of the accelerant, and the accelerant in the patching material is contacted with the epoxy vinyl resin and the curing agent through the permeation action in the process of curing, so that the curing time of the epoxy vinyl resin is shortened; the curing conditions of preheating the high-performance pervious concrete rapid repair material before filling and curing at normal temperature after steam curing can promote the mutual fusion of the repair material, the epoxy vinyl resin and the original pavement material, so that the repair material, the epoxy vinyl resin and the original pavement material are combined more tightly and have better durability.
Compared with the prior art, the invention has the beneficial effects that:
the pervious concrete provided by the invention has the most remarkable advantages that under the condition of normal-temperature curing, the compressive strength of the pervious concrete can stably reach 18-20 MPa within 3h, and the permeability coefficient reaches more than 1.5 mm/s; the 28d compressive strength of the concrete road can reach 45-50 MPa, the water permeability coefficient is not lower than 1.2mm/s, the concrete road repairing and repairing engineering requirements of the heavy-load permeable concrete road are completely met, the traffic blocking time caused by maintenance of the heavy-load permeable concrete road can be effectively shortened, and the concrete road repairing and repairing method has remarkable social and economic benefits.
When the pavement repairing method is adopted for pavement repairing, the bonding strength is still up to 3.15MPa after the pavement is subjected to damp-heat aging for 21 days, the damage form is concrete damage, and the problems of repair material falling and the like are not caused; after 15 cold and hot cycles, the bonding strength is still as high as 2.82MPa, the damage form is concrete damage, and the problems of repair material falling and the like do not occur.
Detailed Description
Reference will now be made in detail to various exemplary embodiments of the invention, the detailed description should not be construed as limiting the invention but as a more detailed description of certain aspects, features and embodiments of the invention.
It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Further, for numerical ranges in this disclosure, it is understood that each intervening value, between the upper and lower limit of that range, is also specifically disclosed. Every smaller range between any stated value or intervening value in a stated range and any other stated or intervening value in a stated range is encompassed within the invention. The upper and lower limits of these smaller ranges may independently be included or excluded in the range.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Although only preferred methods and materials are described herein, any methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present invention. All documents mentioned in this specification are incorporated by reference herein for the purpose of disclosing and describing the methods and/or materials associated with the documents. In case of conflict with any incorporated document, the present specification will control.
It will be apparent to those skilled in the art that various modifications and variations can be made in the specific embodiments of the present disclosure without departing from the scope or spirit of the disclosure. Other embodiments will be apparent to those skilled in the art from consideration of the specification. The description and examples are intended to be illustrative only.
As used herein, the terms "comprising," "including," "having," "containing," and the like are open-ended terms that mean including, but not limited to.
In the following examples of the present invention, metakaolin having an average particle diameter of 5 to 10 μm and a specific surface area of 780m is used2Per kg; the mineral powder is superfine mineral powder with the average particle size of 10-15 um and the specific surface area of 550m2Per kg; the quartz sand is fine quartz sand with the average grain diameter of 630 mu m and is continuously graded; the stones are made of basalt, have the grain size of 4.75 mm-9.5 mm and are continuously graded; the calcium carbonate crystal whisker is aragonite, the diameter is 1-2 um, and the length is 20-30 um; the sodium silicate is powder, and the modulus is 1; the average particle size of the nano calcium carbonate is 10-100 nm.
The epoxy vinyl resin, the curing agent (amine curing agent) and the accelerator (phenol accelerator) are all purchased from the market and have no special requirements.
Examples 1 to 3
(1) The raw materials were weighed according to the contents of table 1:
table 1 raw material ratios (parts by mass) of examples 1 to 3
(2) And mixing and ultrasonically stirring the calcium chloride, the sodium sulfate, the sodium nitrite, the triethanolamine, the aluminum oxide and 2 parts of water for 30min to obtain the material A. And secondly, mixing and uniformly stirring metakaolin, superfine mineral powder, sodium silicate, calcium carbonate whiskers, nano calcium carbonate and the balance of water for 10min to obtain a material B. And finally, adding the fine quartz sand and the stones into the material A and the material B, mixing and uniformly stirring for 3min to obtain the materials of each group of the embodiments. The materials were tested for compressive strength and water permeability according to standard DB11/T775-2010 Specification for pervious concrete pavements, with the results shown in Table 2.
TABLE 2 test results of compressive strength and Water permeability coefficient of examples 1 to 3
The test result shows that: the pervious concrete prepared by the three mixing ratios given in the embodiment has the super early strength characteristic, and the 3h compressive strength of the pervious concrete exceeds 18MPa and can reach 21.5MPa at most; the water permeability coefficients are all over 1.5mm/s and can reach 2.3mm/s at most, and the basic requirements (not less than 0.5mm/s) of the pervious concrete are met. Meanwhile, the pervious concrete prepared by the three mixing ratios given in the embodiment has ultrahigh strength, and the 28d compressive strength of the pervious concrete exceeds 42MPa and can reach 51.4MPa to the maximum; the water permeability coefficient exceeds 1.2mm/s, and can reach 1.76mm/s at most. Therefore, the pervious concrete material disclosed by the invention completely meets the requirements of rapid repair and rush-repair engineering of a heavy-load pervious concrete road, can effectively shorten the traffic blocking time caused by the maintenance of the heavy-load pervious road, and has good social and economic benefits.
Comparative example 1
The comparative example raw materials included: 18 parts of metakaolin, 20 parts of superfine mineral powder, 15 parts of fine quartz sand, 110 parts of stones, 12 parts of sodium silicate and 15 parts of water. Firstly, metakaolin, superfine mineral powder, sodium silicate and water are mixed and uniformly stirred for 10min, then fine quartz sand and stones are added, and the mixture is mixed and uniformly stirred for 3min, thus obtaining the material of comparative example 1. The materials were tested for compressive strength and water permeability according to standard DB11/T775-2010 Specification for pervious concrete pavements, with the results shown in Table 3.
Table 3 compression strength and water permeability coefficient test results of comparative example 1
The test result shows that: the pervious concrete shown in the comparative example 1 has high early strength, but cannot meet the rapid repair of the heavy-load pervious road, and the 28d strength cannot meet the requirement of the heavy-load pervious road.
Comparative example 2
The comparative example raw materials included: 18 parts of metakaolin, 20 parts of superfine mineral powder, 15 parts of fine quartz sand, 110 parts of stones, 12 parts of sodium silicate, 0.15 part of nano calcium carbonate, 5 parts of calcium carbonate whiskers and 15 parts of water, wherein the selected raw materials all meet the detailed requirements in the claims. Firstly, metakaolin, superfine mineral powder, sodium silicate, nano calcium carbonate, calcium carbonate whiskers and water are mixed and uniformly stirred for 10min, then fine quartz sand and stones are added, and the mixture is mixed and uniformly stirred for 3min, thus obtaining the material of the comparative example 2. The materials were tested for compressive strength and water permeability according to standard DB11/T775-2010 Specification for pervious concrete pavements, with the results shown in Table 4.
Table 4 compression strength and water permeability coefficient test results of comparative example 2
The test result shows that: the pervious concrete shown in the comparative example 2 has high early strength, but can not meet the requirement of rapid repair of the heavy-load pervious road, and the 28d strength still can not meet the requirement of the heavy-load pervious road.
Application example 1
The high-performance pervious concrete rapid repair material prepared in the examples 1 to 3 is subjected to a simulation repair experiment:
(1) 364 parts of P & 052.5 type ordinary portland cement, 17.5 parts of silica fume, 46.5 parts of mineral powder, 1410 parts of stones (basalt with the particle size of 5-8 mm), 176 parts of machine-made sand (medium sand with the fineness modulus of 2.5-2.8), 10.73 parts of calcium carbonate whiskers, 12.5 parts of an inorganic gelling agent, 0.12 part of hydroxyethyl cellulose, 3.82 parts of a polycarboxylic acid high-efficiency water reducing agent, 0.13 part of an antifoaming agent and 106.76 parts of water are selected as raw materials.
Wherein the hydroxyethyl cellulose is purchased from Cellosize corporation QP-300H series; the polycarboxylic acid high-efficiency water reducing agent is purchased from Sika company Viscocrete-540P series; antifoam agents available from AXILAT DF6352DD series; the inorganic gelling agent is prepared using the method in publication No. CN 110304858A; the silica fume and mineral powder are purchased from platinum-lubricating new material science and technology limited; the calcium carbonate whisker is purchased from Shanghai Poncirus composite new material science and technology Co.
(2) Mixing 20% of water with calcium carbonate whiskers and hydroxyethyl cellulose, and ultrasonically dispersing for 12min by adopting an integrated ultrasonic processor to obtain a material A; mixing a polycarboxylic acid high-efficiency water reducing agent, an inorganic cementing material and 10% of water, stirring for 4min at normal temperature, and obtaining a material B at the stirring speed of 50 r/min; mixing and stirring all cement, silica fume and mineral powder in a horizontal concrete stirrer for 2min at a stirring speed of 70r/min to obtain a material C; adding the balance of water and the material B, continuing stirring for 2min, then adding all defoaming agents, stirring for 1min at normal temperature at a stirring speed of 70r/min, adding machine-made sand, stirring for 1min, adding stones, stirring for 2min to obtain a mixture, filling the mixture into a mold (a half-8-shaped mold), performing 2MPa static pressure forming, curing for 24h, then removing the mold, and performing natural curing for 28 days;
(3) taking the side surface of the semi-8-shaped concrete block prepared in the step (2) as a road surface to be repaired, spraying an epoxy vinyl resin and curing agent mixture (the spraying thickness is 1cm) with the mass ratio of 5:3 on the surface of the concrete block, placing the concrete block in an 8-shaped mould, and filling the repair material of the embodiment 1 with the same volume and structure on the side surface of the semi-8-shaped concrete block, wherein the concrete filling process comprises the following steps: preheating the repairing material and the semi-8-shaped concrete block to 40 ℃, wherein the repairing material is divided into A and B according to the volume ratio of 1:3, the accelerator (epoxy vinyl resin and accelerator mass ratio of 1:1) is added into the A part, and the A part is uniformly mixed with the accelerator and then filled into the 8-shaped mould to be in contact with the semi-8-shaped concrete block (the side on which the epoxy vinyl resin is sprayed); filling the repairing material B, curing for 5 hours by steam, and curing at normal temperature for 28 days to obtain an experiment sample block;
(4) and placing the experimental sample block in a constant temperature and humidity testing machine, setting the environmental temperature at 60 ℃ and the humidity of 98 percent, standing for 21 days, then using the experimental sample block in an electronic universal testing machine, stretching the sample at a constant speed at an experimental speed of 2mm/min until the sample is broken, and measuring the bonding strength. The results show that the bond strength is 3.15MPa, the failure mode is concrete failure, and the bond line is not broken;
(5) and placing the experimental sample block in a high-low temperature test box, performing cold and hot circulation, specifically, performing circulation in an environment of 70 ℃ for 12h and a environment of-5 ℃ for 12h, after circulating for 15 times, using an electronic universal testing machine, stretching the sample at a constant speed at an experimental speed of 2mm/min until the sample is broken, and determining that the bonding strength is 2.82MPa, wherein the breaking form is concrete breaking, and the bonding layer is not broken.
Application example 2
The difference from application example 1 is that:
in the step (3), the side face of the semi-8-shaped concrete block prepared in the step (2) is used as a pavement to be repaired and is placed in an 8-shaped mould, the repair material in the embodiment 1 with the same volume and the same structure is filled on the side face of the semi-8-shaped concrete block, and after 5 hours of steam curing, the concrete block is cured at normal temperature for 28 days to obtain an experimental sample block;
the experimental methods of the step (4) and the step (5) in the application example 1 are adopted to verify that after the humid heat aging is carried out for 21 days, the bonding strength is 2.85MPa, the damage form is concrete damage, and the bonding layer is not broken; after 15 cold and hot cycles, the bonding strength is 2.54MPa, the failure mode is concrete failure, and the bonding layer is not broken.
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 and improvements made within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The high-performance pervious concrete rapid repairing material is characterized by comprising the following raw materials in parts by mass: 12-18 parts of metakaolin, 14-20 parts of mineral powder, 12-15 parts of quartz sand, 100-110 parts of pebbles, 0.12-0.15 part of nano calcium carbonate, 2-5 parts of calcium carbonate whiskers, 8-12 parts of sodium silicate, 0.25-0.45 part of calcium chloride, 0.1-0.2 part of sodium sulfate, 0.05-0.1 part of sodium nitrite, 0.03-0.06 part of triethanolamine, 0.05-0.08 part of aluminum oxide and 13-15 parts of water.
2. The high-performance pervious concrete rapid repairing material as claimed in claim 1, wherein the metakaolin has an average particle size of 5-10 μm and a specific surface area of not less than 750m2Per kg; the average particle size of the mineral powder is 10-15 um, and the specific surface area is not less than 525m2Per kg; the average grain size of the quartz sand is 630um, and the quartz sand is continuously graded; the stones are made of basalt, have the grain size of 4.75 mm-9.5 mm and are continuously graded; the calcium carbonate crystal whisker is aragonite, the diameter is 1-2 um, and the length is 20-30 um; the sodium silicate is powder, and the modulus is 1; the average particle size of the nano calcium carbonate is 10-100 nm.
3. The preparation method of the high-performance pervious concrete rapid repairing mass according to any one of claims 1-2, characterized by comprising the following steps:
mixing and stirring 1-2 parts of calcium chloride, sodium sulfate, sodium nitrite, triethanolamine, aluminum oxide and water to obtain a material A;
mixing and stirring metakaolin, mineral powder, sodium silicate, calcium carbonate whiskers, nano calcium carbonate and 11-13 parts of water to obtain a material B;
and mixing and stirring the quartz sand, the pebbles, the material A and the material B to obtain the high-performance pervious concrete rapid repairing material.
4. Use of the high-performance pervious concrete rapid repair material according to any one of claims 1-2 in road repair.
5. The application of the high-performance pervious concrete rapid repairing material in road repairing according to claim 4, wherein the road is a heavy-load pervious road.
6. A road repairing method, characterized in that the high-performance pervious concrete rapid repair material according to any one of claims 1-2 is used for road repairing.
7. The road patching method of claim 6, comprising the steps of:
(1) carrying out base surface treatment on the road surface to be repaired to remove surface dirt and floating dust;
(2) spraying epoxy vinyl resin and curing agent mixture on the surface layer of the repaired pavement processed in the step (1);
(3) the high-performance pervious concrete rapid repair material as claimed in any one of claims 1-2 is divided into A, B parts according to the total use amount, wherein A part is mixed with an accelerator and filled in the inner layer of a repaired pavement, B part is filled in the upper layer of A part of the repair material, and the repairing is carried out for 3h-28 days.
8. The method of claim 7, wherein step (1) further comprises sanding the underlying surface irregularities; the mass ratio of the epoxy vinyl resin to the curing agent in the mixture of the epoxy vinyl resin and the curing agent in the step (2) is 5: (1-3) the spraying thickness is 0.5-1 cm.
9. The road patching method of claim 7, wherein in the step (3), A, B is carried out in a volume ratio of 1: (3-5); the mass ratio of the accelerator to the epoxy vinyl resin is (4-5): 5.
10. the road repairing method according to claim 7, wherein the high-performance pervious concrete rapid repairing mix in the step (3) is preheated to 30-60 ℃ before filling, and the curing is specifically normal-temperature curing after steam curing for 3-5 hours.
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