CN112897949A - Biological erosion-preventing wear-resisting recycled aggregate pervious concrete and preparation method thereof - Google Patents
Biological erosion-preventing wear-resisting recycled aggregate pervious concrete and preparation method thereof Download PDFInfo
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- 239000011380 pervious concrete Substances 0.000 title claims abstract description 56
- 238000002360 preparation method Methods 0.000 title abstract description 6
- 239000002893 slag Substances 0.000 claims abstract description 50
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 48
- 239000000843 powder Substances 0.000 claims abstract description 41
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000010949 copper Substances 0.000 claims abstract description 36
- 229910052802 copper Inorganic materials 0.000 claims abstract description 36
- 230000003628 erosive effect Effects 0.000 claims abstract description 36
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 20
- 239000004568 cement Substances 0.000 claims abstract description 19
- 239000004816 latex Substances 0.000 claims abstract description 19
- 229920000126 latex Polymers 0.000 claims abstract description 19
- 229910000365 copper sulfate Inorganic materials 0.000 claims abstract description 18
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 claims abstract description 18
- 239000004115 Sodium Silicate Substances 0.000 claims abstract description 17
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000011777 magnesium Substances 0.000 claims abstract description 16
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 16
- 229920003086 cellulose ether Polymers 0.000 claims abstract description 15
- 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
- 238000010276 construction Methods 0.000 claims description 13
- 239000002699 waste material Substances 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 11
- 239000002245 particle Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 7
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 claims description 7
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims description 7
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims description 7
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical group OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 claims description 7
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 6
- 239000011734 sodium Substances 0.000 claims description 6
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 4
- 239000005977 Ethylene Substances 0.000 claims description 4
- 238000003723 Smelting Methods 0.000 claims description 4
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 239000004570 mortar (masonry) Substances 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 claims description 3
- 239000005751 Copper oxide Substances 0.000 claims description 3
- 239000011398 Portland cement Substances 0.000 claims description 3
- 229910052681 coesite Inorganic materials 0.000 claims description 3
- 229910000431 copper oxide Inorganic materials 0.000 claims description 3
- 229910052906 cristobalite Inorganic materials 0.000 claims description 3
- -1 hydroxypropyl Chemical group 0.000 claims description 3
- GRVDJDISBSALJP-UHFFFAOYSA-N methyloxidanyl Chemical group [O]C GRVDJDISBSALJP-UHFFFAOYSA-N 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 238000012216 screening Methods 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 229910052682 stishovite Inorganic materials 0.000 claims description 3
- 229910052905 tridymite Inorganic materials 0.000 claims description 3
- 239000004575 stone Substances 0.000 claims description 2
- 229920001577 copolymer Polymers 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 11
- 239000004567 concrete Substances 0.000 abstract description 10
- 239000002002 slurry Substances 0.000 abstract description 8
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 abstract description 6
- 229910001431 copper ion Inorganic materials 0.000 abstract description 6
- 230000001954 sterilising effect Effects 0.000 abstract description 4
- 238000004659 sterilization and disinfection Methods 0.000 abstract description 4
- 238000003911 water pollution Methods 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 10
- 239000011248 coating agent Substances 0.000 description 6
- 238000000576 coating method Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 238000005299 abrasion Methods 0.000 description 5
- 239000011148 porous material Substances 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- 230000002265 prevention Effects 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000002401 inhibitory effect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000002829 reductive effect Effects 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000002209 hydrophobic effect Effects 0.000 description 2
- 230000005764 inhibitory process Effects 0.000 description 2
- 239000002910 solid waste Substances 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
- 241000195940 Bryophyta Species 0.000 description 1
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 238000010835 comparative analysis Methods 0.000 description 1
- 150000001879 copper Chemical class 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 230000003631 expected effect Effects 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- ALVYUZIFSCKIFP-UHFFFAOYSA-N triethoxy(2-methylpropyl)silane Chemical compound CCO[Si](CC(C)C)(OCC)OCC ALVYUZIFSCKIFP-UHFFFAOYSA-N 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- 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
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/2038—Resistance against physical degradation
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/2092—Resistance against biological degradation
-
- 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 biological erosion resistant wear-resistant recycled aggregate pervious concrete and a preparation method thereof, wherein the pervious concrete comprises the following components in parts by weight: recycled aggregate: 1350 parts of cement: 285-360 parts, superfine slag powder: 25-45 parts of copper tailing slag: 25-45 parts of water: 90-125 parts of water reducing agent: 0.16-0.22 parts of re-dispersible latex powder: 12-25 parts of cellulose ether: 0.15-0.25 parts of magnesium fluosilicate: 0.5-4 parts of sodium silicate: 1-5 parts of copper sulfate: 0.5-3 parts. Compared with common pervious concrete, the concrete has more excellent wear resistance by adding the copper tailing slag and utilizing the wear resistance of the slag, can effectively inhibit the growth of moss in outdoor semi-anionic moist environment by the slow release effect of copper ions of copper sulfate in cement slurry with strong basicity and compact structure in moist environment, has a certain sterilization effect, can reduce underground water pollution, and has good working performance, resource saving, low cost, environmental friendliness and wide application prospect.
Description
Technical Field
The invention relates to the technical field of urban road construction, in particular to a biological erosion-resistant wear-resistant recycled aggregate pervious concrete and a preparation method thereof.
Background
The total production amount of the construction waste generated along with the development of the construction and transportation industries in China is huge every year, most of the construction waste is stacked or buried in the open air, the utilization rate is extremely low, and the resource is seriously wasted. The production and utilization of the construction waste recycled aggregate have important significance for saving resources, protecting the environment and realizing the sustainable development of the construction industry.
In recent years, urban inland inundation and heat island effect seriously affect the transportation of people. In order to promote the process of sponge cities, large-area pervious concrete is paved in parks, open parking lots, sidewalks and other places, but on semi-cloudy and humid ground, a lot of mosses can grow on pervious road surfaces, so that the pervious concrete pore passages are blocked, and serious potential safety hazards can be caused to pedestrians. The biological erosion preventing wear-resistant recycled aggregate pervious concrete pavement well solves the problems, can relieve waterlogging, reasonably store water resources underground, effectively inhibit the growth of moss, has the advantages of rich application scenes, environment beautification, resource saving, low cost and the like, and has great significance for promoting the progress of sponge cities.
At present, researches on improving the wear resistance and biological erosion resistance of pervious concrete have been reported at home and abroad. Firstly, in the aspect of improving the wear resistance, the Chinese patent with the application number of CN201811050343.3 discloses a pervious concrete system prepared from construction waste and a preparation method thereof, wherein the construction waste coarse aggregate is mixed and stirred with a mixed solution of isobutyl triethoxysilane and ethyl orthosilicate to obtain a modified recycled coarse aggregate, so that the wear resistance of the pervious concrete is improved. For engineering application with huge workload, the modified aggregates have the advantages of complex technical operation, low efficiency, higher cost and unsuitability for popularization. Secondly, in the aspect of permeable concrete biological blockage, the existing solution method mainly sprays a coating remover or washes the permeable concrete by a high-pressure water gun, so that the efficiency is low, the high-concentration coating remover and high-pressure water can also influence the groundwater environment and the concrete surface structure, and the aims of preventing and removing the coating cannot be achieved. In the aspect of biological erosion prevention, similar researches are also carried out, and Chinese patent application No. CN201810355593.1 discloses an environment-friendly building coating for inhibiting the growth of moss, which provides an environment-friendly building surface coating for inhibiting the growth of moss, wherein a waterproof sterilization layer is coated on the surface of a building, and consists of hydrophobic light converters; the water required by the growth of the thallus is reduced through hydrophobic effect, and the sterilization radiation wave band is obtained through light conversion. Since the service life of the building material is long, the durability of the coating is a problem which must be considered, and the light conversion body has low conversion efficiency in the visible light band, and the expected effect is difficult to achieve. Therefore, the research on the pervious concrete with good wear resistance and biological erosion resistance has important research and application significance.
Disclosure of Invention
In view of the above, the invention aims to provide a biological erosion prevention wear-resistant recycled aggregate pervious concrete, which adopts copper slag as a main raw material, can recycle solid wastes, fully utilizes the wear-resistant characteristic thereof to produce the wear-resistant pervious concrete, and in addition, adds a proper amount of copper sulfate, and utilizes the copper ion slow-release effect thereof in the concrete on the premise of no harm to the environment, so that the biological erosion prevention wear-resistant recycled aggregate pervious concrete can not only sterilize to reduce water pollution, but also effectively inhibit the growth of moss vegetation, and can effectively solve the problems that the existing recycled aggregate pervious concrete is not resistant to biological erosion and has poor wear resistance.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the biological erosion resistant wear-resistant recycled aggregate pervious concrete comprises the following components in parts by weight: recycled aggregate: 1350 parts of cement: 285-360 parts, superfine slag powder: 25-45 parts of copper tailing slag: 25-45 parts of water: 90-125 parts of water reducing agent: 0.16-0.22 parts of re-dispersible latex powder: 12-25 parts of cellulose ether: 0.15-0.25 parts of magnesium fluosilicate: 0.5-4 parts of sodium silicate: 1-5 parts of copper sulfate: 0.5-3 parts.
Optionally, the recycled aggregate is a mortar and gravel mixture obtained by crushing, sorting and screening the construction waste; the recycled aggregate has a bulk density of 1320 to 1350kg/m in a dry state3And the particle size of the recycled aggregate is 5-10 mm.
Optionally, the cement is P · O42.5 portland cement.
Optionally, the copper slag is copper slag obtained by smelting copper in an electric furnace, the fineness of the copper slag is not more than 200 meshes, the content of iron oxide is 45-60%, and the content of copper oxide is 0.3-0.6%.
Optionally, the water reducing agent is a powdery polycarboxylic acid high efficiency water reducing agent.
Optionally, the superfine slag powder has a density of not less than 2.8g/cm3Specific surface area of not less than 500m2/kg。
Optionally, the re-dispersible latex powder is vinyl acetate and ethylene copolymerized latex powder, and the re-dispersible latex powder has an average particle size of 133.5 μm, an ash content of 10.8%, a solid content of not less than 98%, a pH of 7.0, and a bulk density of 480kg/m3The film forming temperature was 0 ℃.
Alternatively, the cellulose ether is a hydroxypropyl methyl cellulose ether; the hydroxypropyl methyl cellulose ether contains 26.04% of methoxyl and 6.08% of hydroxypropyl.
Optionally, the density of the magnesium fluosilicate is 1.788g/cm3(ii) a Na in the sodium silicate2The content of O is 28.6 to 29.6 percent, and Na is2O and SiO2The content ratio is 1.03; the density of the copper sulfate is 3.61g/cm3。
The second purpose of the invention is to provide a method for preparing the biological erosion resistant and wear resistant recycled aggregate pervious concrete, which comprises the following steps:
and (2) stirring and mixing by adopting a forced stirrer, firstly adding the recycled aggregate and 50% of water for stirring, then adding the cement, the superfine slag powder, the copper tailing slag, the magnesium fluosilicate, the sodium silicate and the copper sulfate for stirring, finally adding the rest of the water, the water reducing agent, the re-dispersible latex powder and the cellulose ether for stirring, and obtaining the biological erosion resistant wear-resistant recycled aggregate pervious concrete.
The design principle of the invention is as follows:
aiming at the problem that the existing pervious concrete is not resistant to biological erosion, the invention considers that a proper amount of copper sulfate is added into the raw materials, copper ions can generate insoluble copper salt in a strong alkaline environment, the copper ions can be released only when water flows through or in a humid environment, and meanwhile, the compact cementing material can effectively slow down the dissolution rate of the copper ions, so that the inhibition effect on the growth of moss vegetation is achieved, a certain sterilization effect can be achieved, the pollution to underground water is reduced, and the environment is not influenced.
Because the copper tailing slag has lower activity and larger fineness, the compressive strength of the recycled aggregate permeable concrete can be influenced after partial cement is replaced. According to the invention, by adding the superfine slag powder, the pores between the cement particles and the copper tailing slag particles are filled through the large specific surface area and high activity of the mineral powder, so that the structure of the cementing material is more compact. And meanwhile, the vinyl acetate and ethylene copolymerized rubber powder are added, so that the problem of untight bonding between mortar attached to the surface of the recycled aggregate and a cementing material interface is effectively solved, and the problem of insufficient compressive strength of concrete after copper slag is added is solved.
The magnesium fluosilicate and the sodium silicate added in the invention can permeate into pores and microcracks on the surface of the slurry, fill the pores between the copper slag and the cement particles in the slurry and improve the pore structure. The strength and hardness of the surface of the slurry can be effectively improved, a compact surface layer is formed on the surface, the impermeability is improved so as to reduce the leaching rate of copper ions, the slow release effect is achieved, and the carbonization resistance, the running water erosion resistance, the wear resistance and the biological erosion resistance of the pervious concrete are improved.
Because the copper tailing slag has low activity and large fineness, the bleeding phenomenon of the cementing material is serious after more copper slag is added, and the fluidity is increased, so that the slurry is lost to the bottom of the pervious concrete during molding to cause the hole plugging phenomenon. Therefore, the hydroxypropyl methyl cellulose ether and the polycarboxylic acid water reducing agent are added to adjust the consistency of the slurry in a synergistic manner, and in addition, the large specific surface area of the added superfine slag powder also effectively increases the consistency of the slurry. Not only can the surface of the aggregate be uniformly wrapped with the slurry and not be lost, but also the good workability of the pervious concrete can be ensured.
Compared with the prior art, the anti-biological erosion wear-resistant recycled aggregate pervious concrete has the following advantages:
1. the invention functionally utilizes various wastes, the main raw materials of the wastes are recycled aggregate after the construction waste is crushed and solid waste copper slag obtained after copper ore smelting, the occupation of the construction waste accumulation on the land area, the exploitation of a large amount of natural aggregate and the problems of environmental pollution caused by the accumulation and landfill of the copper slag are reduced, and the contribution to the resource recycling is great.
2. The pervious concrete prepared by the invention has rich functionality, has two functions of excellent wear resistance and biological erosion resistance, has obvious effect of inhibiting the growth of moss vegetation in a semi-yin humid environment, and reduces the blocking probability and potential safety hazard; the wear resistance is good, the multi-scene application standard is met, and the service life of the water permeable material is effectively prolonged.
3. Most of the raw materials of the invention have very low cost, simple preparation, good working performance and easy maintenance, and are suitable for actual production and rapid popularization.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail with reference to examples.
Example 1
The biological erosion resistant wear-resistant recycled aggregate pervious concrete comprises the following components in parts by weight: 1350 parts of recycled aggregate, 350 parts of cement, 30 parts of superfine slag powder, 26 parts of copper slag, 115 parts of water, 0.20 part of water reducing agent, 25 parts of re-dispersible latex powder, 0.16 part of cellulose ether, 2 parts of magnesium fluosilicate, 3 parts of sodium silicate and 0.5 part of copper sulfate.
Example 2
The biological erosion resistant wear-resistant recycled aggregate pervious concrete comprises the following components in parts by weight: 1350 parts of recycled aggregate, 360 parts of cement, 40 parts of superfine slag powder, 35 parts of copper slag, 105 parts of water, 0.17 part of water reducing agent, 25 parts of re-dispersible latex powder, 0.20 part of cellulose ether, 4 parts of magnesium fluosilicate, 3 parts of sodium silicate and 3 parts of copper sulfate.
Example 3
The biological erosion resistant wear-resistant recycled aggregate pervious concrete comprises the following components in parts by weight: 1350 parts of recycled aggregate, 320 parts of cement, 25 parts of superfine slag powder, 45 parts of copper slag, 100 parts of water, 0.21 part of water reducing agent, 20 parts of re-dispersible latex powder, 0.18 part of cellulose ether, 2.5 parts of magnesium fluosilicate, 1-5 parts of sodium silicate and 2.5 parts of copper sulfate.
Example 4
The biological erosion resistant wear-resistant recycled aggregate pervious concrete comprises the following components in parts by weight: 1350 parts of recycled aggregate, 305 parts of cement, 40 parts of superfine slag powder, 40 parts of copper slag, 115 parts of water, 0.19 part of water reducing agent, 20 parts of re-dispersible latex powder, 0.19 part of cellulose ether, 2.5 parts of magnesium fluosilicate, 2 parts of sodium silicate and 2 parts of copper sulfate.
Example 5
The biological erosion resistant wear-resistant recycled aggregate pervious concrete comprises the following components in parts by weight: 1350 parts of recycled aggregate, 330 parts of cement, 35 parts of superfine slag powder, 45 parts of copper tailing slag, 120 parts of water, 0.17 part of water reducing agent, 20 parts of re-dispersible latex powder, 0.25 part of cellulose ether, 3.5 parts of magnesium fluosilicate, 2 parts of sodium silicate and 1 part of copper sulfate.
Example 6
The biological erosion resistant wear-resistant recycled aggregate pervious concrete comprises the following components in parts by weight: 1350 parts of recycled aggregate, 285 parts of cement, 35 parts of superfine slag powder, 45 parts of copper slag, 125 parts of water, 0.17 part of water reducing agent, 25 parts of re-dispersible latex powder, 0.15 part of cellulose ether, 3 parts of magnesium fluosilicate, 1 part of sodium silicate and 0.5 part of copper sulfate.
The raw materials used in the examples of the invention have the following properties: the recycled aggregate is a mixture of mortar and crushed stone obtained by crushing, sorting and screening construction waste, and the quality of the obtained recycled aggregate meets the relevant requirements of the technical specifications of the recycled aggregate pervious concrete; in order to reduce the bulk density of the pervious concrete, the bulk density of the recycled aggregate is 1320-1350 kg/m in a dry state3The particle size of the recycled aggregate is 5-10 mm;
the cement is P.O 42.5 ordinary portland cement;
the copper slag is copper slag of electric furnace copper smelting, the fineness of the copper slag is not more than 200 meshes, the content of iron oxide in the copper slag is 45-60%, and the content of copper oxide is 0.3-0.6%;
the water reducing agent is a powdery polycarboxylic acid high-efficiency water reducing agent, and the solid content of the water reducing agent is 100 percent;
the density of the superfine slag powder is not less than 2.8g/cm3Specific surface area of not less than 500m2/kg；
The re-dispersible latex powder is vinyl acetate and ethylene copolymerized latex powder, the average particle size of the re-dispersible latex powder is 133.5 mu m, the ash content is 10.8 percent, the solid content is not less than 98 percent, the pH value is 7.0, and the bulk density is 480kg/m3The film forming temperature is 0 ℃;
the cellulose ether is hydroxypropyl methyl cellulose ether; the content of methoxyl in hydroxypropyl methyl cellulose ether is 26.04 percent, and the content of hydroxypropyl is 6.08 percent;
the magnesium fluosilicate is white crystal, is easy to dissolve in water, and has the density of 1.788g/cm3；
The sodium silicate is white powder, and Na is contained in the sodium silicate2The content of O is 28.6 to 29.6 percent, and Na is2O and SiO2The content ratio is 1.03;
the copper sulfate is white powder, is easily soluble in water, and has a density of 3.61g/cm3。
The biological erosion preventing wear-resistant recycled aggregate pervious concrete of each embodiment of the invention is prepared by the following method:
1) weighing the components according to the proportion;
2) adding the regenerated coarse aggregate and 50% of mixing water into a forced mixer, starting the forced mixer, stirring until the surface of the aggregate is fully wetted, pouring the uniformly mixed cement, superfine slag powder, copper tailing slag, magnesium fluosilicate, sodium silicate and copper sulfate, and continuously stirring until the surface of the aggregate is uniformly wrapped; and then dissolving the water reducing agent, the re-dispersible latex powder and the cellulose ether by part of water, pouring the dissolved water and the rest water into a stirrer, and uniformly stirring to obtain the biological erosion preventing wear-resistant recycled aggregate pervious concrete of each embodiment.
In practical application, the mixed anti-biological erosion wear-resistant recycled aggregate pervious concrete of each embodiment can be taken out, poured on a road surface and compacted.
The main performance test method of the biological erosion prevention wear-resistant recycled aggregate pervious concrete of each embodiment of the invention is as follows:
and (3) testing the compressive strength: the compressive strength of the pervious concrete with the age of 28 days is tested, and the 28-balance-average compressive strength test result of the anti-biological erosion wear-resistant recycled aggregate pervious concrete of each example is shown in the table 1.
And (3) wear resistance test: the water-permeable concrete of examples 1 to 6 was tested for an abrasion resistance index of 28 days in age by using a los Angeles abrasion machine according to the American society for testing and materials ASTM C1747 standard. The specific method comprises the following steps: record the weight m of the sample1A set of 3 specimens was then placed in the abrader for testing. Wherein the rotation speed of the wearing machine is 30-33 r/min, and the rotation speed is 500 r/min. The mass m of 3 samples is recorded after the test is finished2The abrasion loss of the concrete was calculated according to formula 1, and the results of the abrasion resistance test of the bio-erosion resistant abrasion resistant recycled aggregate pervious concrete of each example are shown in table 2.
Anti-bioerosion ability test: the specific implementation method is as follows,
1) measurement of surface area S of pervious concrete in examples 1 to 61Recording, placing each group of samples outdoors in a semi-negative environment, and smearing a self-made moss growing mixture on the surface, wherein the outdoor temperature is 20-25 ℃;
2) spraying water on the concrete regularly every day, and keeping the relative air humidity at about 80%;
3) recording the coverage area S of the moss on the surface of each group of the pervious concrete at 15 days, 30 days and 45 days respectively2Averaging, and carrying out comparative analysis on the samples in examples 1-6;
4) the moss inhibition rate was calculated according to formula 2, and the results of the bioerosion-resistant capability test of the bioerosion-resistant wear-resistant recycled aggregate pervious concrete of each example are shown in table 3.
TABLE 1
| Examples | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Example 6 |
| Compressive strength (MPa) | 14.3 | 12.6 | 11.8 | 15.9 | 13.5 | 12.9 |
TABLE 2
| Examples | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Example 6 |
| m1 | 1.760 | 1.737 | 1.788 | 1.809 | 1.886 | 1.841 |
| m2 | 1.493 | 1.491 | 1.582 | 1.649 | 1.709 | 1.620 |
| Rate of wear | 13.2％ | 14.2％ | 11.5％ | 8.7％ | 9.4％ | 12.0％ |
The anti-bioerosion ability was tested as shown in Table 3
TABLE 3 results of the test of examples 1 to 6 on the capability of resisting bioerosion
As can be seen from tables 1-3, the anti-bioerosion wear-resistant recycled aggregate pervious concrete of the embodiments of the invention has excellent wear resistance and anti-bioerosion, and the compressive strength thereof meets the requirements of relevant specifications.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The biological erosion resistant wear-resistant recycled aggregate pervious concrete is characterized by comprising the following components in parts by weight: recycled aggregate: 1350 parts of cement: 285-360 parts, superfine slag powder: 25-45 parts of copper tailing slag: 25-45 parts of water: 90-125 parts of water reducing agent: 0.16-0.22 parts of re-dispersible latex powder: 12-25 parts of cellulose ether: 0.15-0.25 parts of magnesium fluosilicate: 0.5-4 parts of sodium silicate: 1-5 parts of copper sulfate: 0.5-3 parts.
2. The biological erosion preventing wear-resistant recycled aggregate pervious concrete as claimed in claim 1, wherein the recycled aggregate is a mixture of mortar and crushed stone obtained by crushing, sorting and screening construction waste; the recycled aggregate has a bulk density of 1320 to 1350kg/m in a dry state3And the particle size of the recycled aggregate is 5-10 mm.
3. The bioerosion-preventing wear-resistant recycled aggregate pervious concrete according to claim 1, characterized in that said cement is P-O42.5 ordinary portland cement.
4. The biological erosion preventing wear-resistant recycled aggregate pervious concrete as claimed in claim 1, wherein the copper slag is copper slag of electric furnace copper smelting, the fineness of the copper slag is not more than 200 meshes, the content of iron oxide is 45-60%, and the content of copper oxide is 0.3-0.6%.
5. The biological erosion preventing wear-resistant recycled aggregate pervious concrete of claim 1, characterized in that the water reducing agent is a powdery polycarboxylic acid high-efficiency water reducing agent.
6. The bioerosion-preventing wear-resistant recycled aggregate pervious concrete according to claim 1, wherein the density of the ultrafine slag powder is not less than 2.8g/cm3Specific surface area of not less than 500m2/kg。
7. The biological erosion preventing wear-resistant recycled aggregate pervious concrete as claimed in claim 1, wherein the re-dispersible latex powder is a copolymer powder of vinyl acetate and ethylene, and has an average particle size of 133.5 μm, an ash content of 10.8%, a solid content of not less than 98%, a pH of not less than 98%7.0, bulk density 480kg/m3The film forming temperature was 0 ℃.
8. The bioerosion-preventing wear-resistant recycled aggregate pervious concrete of claim 1, wherein said cellulose ether is hydroxypropyl methyl cellulose ether; the hydroxypropyl methyl cellulose ether contains 26.04% of methoxyl and 6.08% of hydroxypropyl.
9. The biological erosion preventing wear-resistant recycled aggregate pervious concrete as claimed in claim 1, wherein the density of the magnesium fluosilicate is 1.788g/cm3(ii) a Na in the sodium silicate2The content of O is 28.6 to 29.6 percent, and Na is2O and SiO2The content ratio is 1.03; the density of the copper sulfate is 3.61g/cm3。
10. The method for preparing the biological erosion resistant wear-resistant recycled aggregate pervious concrete of any one of claims 1 to 9, characterized by comprising the steps of:
and (2) stirring and mixing by adopting a forced stirrer, firstly adding the recycled aggregate and 50% of water for stirring, then adding the cement, the superfine slag powder, the copper tailing slag, the magnesium fluosilicate, the sodium silicate and the copper sulfate for stirring, finally adding the rest of the water, the water reducing agent, the re-dispersible latex powder and the cellulose ether for stirring, and obtaining the biological erosion resistant wear-resistant recycled aggregate pervious concrete.
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| CN113387660A (en) * | 2021-07-21 | 2021-09-14 | 四川佰汇混凝土工程有限公司 | C30 underwater self-compacting concrete and preparation method thereof |
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