CN110407493A - A method of concrete is prepared using building waste - Google Patents
A method of concrete is prepared using building waste Download PDFInfo
- Publication number
- CN110407493A CN110407493A CN201910825678.6A CN201910825678A CN110407493A CN 110407493 A CN110407493 A CN 110407493A CN 201910825678 A CN201910825678 A CN 201910825678A CN 110407493 A CN110407493 A CN 110407493A
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- Prior art keywords
- building waste
- concrete
- added
- water
- pellet
- Prior art date
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- Granted
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- 239000002699 waste material Substances 0.000 title claims abstract description 125
- 239000004567 concrete Substances 0.000 title claims abstract description 81
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000008188 pellet Substances 0.000 claims abstract description 41
- 239000008187 granular material Substances 0.000 claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000000725 suspension Substances 0.000 claims abstract description 21
- 239000004568 cement Substances 0.000 claims abstract description 17
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 16
- 239000004115 Sodium Silicate Substances 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
- 235000019795 sodium metasilicate Nutrition 0.000 claims abstract description 13
- 238000003756 stirring Methods 0.000 claims abstract description 12
- 239000003513 alkali Substances 0.000 claims abstract description 6
- 238000012986 modification Methods 0.000 claims abstract description 5
- 230000004048 modification Effects 0.000 claims abstract description 5
- 239000002253 acid Substances 0.000 claims description 13
- 239000012744 reinforcing agent Substances 0.000 claims description 11
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 6
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 6
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 4
- 239000000839 emulsion Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- -1 stirred Uniformly Substances 0.000 claims description 4
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 3
- LZQHZOIDAMYHSS-UHFFFAOYSA-N [F].[Ti] Chemical compound [F].[Ti] LZQHZOIDAMYHSS-UHFFFAOYSA-N 0.000 claims description 3
- 239000000908 ammonium hydroxide Substances 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- WPJGWJITSIEFRP-UHFFFAOYSA-N 1,3,5-triazine-2,4,6-triamine;hydrate Chemical compound O.NC1=NC(N)=NC(N)=N1 WPJGWJITSIEFRP-UHFFFAOYSA-N 0.000 claims description 2
- 229920001732 Lignosulfonate Polymers 0.000 claims description 2
- 239000002174 Styrene-butadiene Substances 0.000 claims description 2
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 2
- 239000004327 boric acid Substances 0.000 claims description 2
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 claims description 2
- 239000005018 casein Substances 0.000 claims description 2
- BECPQYXYKAMYBN-UHFFFAOYSA-N casein, tech. Chemical compound NCCCCC(C(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(CC(C)C)N=C(O)C(CCC(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(C(C)O)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(COP(O)(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(N)CC1=CC=CC=C1 BECPQYXYKAMYBN-UHFFFAOYSA-N 0.000 claims description 2
- 235000021240 caseins Nutrition 0.000 claims description 2
- PSZYNBSKGUBXEH-UHFFFAOYSA-M naphthalene-1-sulfonate Chemical compound C1=CC=C2C(S(=O)(=O)[O-])=CC=CC2=C1 PSZYNBSKGUBXEH-UHFFFAOYSA-M 0.000 claims description 2
- 239000011115 styrene butadiene Substances 0.000 claims description 2
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 2
- 229920001909 styrene-acrylic polymer Polymers 0.000 claims description 2
- 239000010456 wollastonite Substances 0.000 claims description 2
- 229910052882 wollastonite Inorganic materials 0.000 claims description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims 1
- 150000001735 carboxylic acids Chemical class 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 claims 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims 1
- 125000005624 silicic acid group Chemical group 0.000 claims 1
- 239000011734 sodium Substances 0.000 claims 1
- 229910052708 sodium Inorganic materials 0.000 claims 1
- 238000009413 insulation Methods 0.000 abstract description 24
- 238000004321 preservation Methods 0.000 abstract description 11
- 238000002360 preparation method Methods 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 239000000853 adhesive Substances 0.000 abstract description 2
- 230000001070 adhesive effect Effects 0.000 abstract description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 26
- 239000011449 brick Substances 0.000 description 23
- 239000011148 porous material Substances 0.000 description 19
- 230000000052 comparative effect Effects 0.000 description 14
- 229910002012 Aerosil® Inorganic materials 0.000 description 11
- 230000006835 compression Effects 0.000 description 11
- 238000007906 compression Methods 0.000 description 11
- 239000000463 material Substances 0.000 description 9
- 230000009102 absorption Effects 0.000 description 7
- 238000010521 absorption reaction Methods 0.000 description 7
- 239000000377 silicon dioxide Substances 0.000 description 7
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- 239000002994 raw material Substances 0.000 description 6
- 239000002689 soil Substances 0.000 description 6
- 238000009825 accumulation Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 5
- 230000015271 coagulation Effects 0.000 description 5
- 238000005345 coagulation Methods 0.000 description 5
- 239000000017 hydrogel Substances 0.000 description 4
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 3
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 3
- 229910052581 Si3N4 Inorganic materials 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000004566 building material Substances 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 239000011456 concrete brick Substances 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000011398 Portland cement Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000003818 cinder Substances 0.000 description 2
- 239000004035 construction material Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 241000790917 Dioxys <bee> Species 0.000 description 1
- 229920000168 Microcrystalline cellulose Polymers 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000012615 aggregate Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 150000007516 brønsted-lowry acids Chemical class 0.000 description 1
- 150000007528 brønsted-lowry bases Chemical class 0.000 description 1
- FPCJKVGGYOAWIZ-UHFFFAOYSA-N butan-1-ol;titanium Chemical compound [Ti].CCCCO.CCCCO.CCCCO.CCCCO FPCJKVGGYOAWIZ-UHFFFAOYSA-N 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 235000012255 calcium oxide Nutrition 0.000 description 1
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 150000004665 fatty acids Chemical group 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- 239000004579 marble Substances 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 239000011325 microbead Substances 0.000 description 1
- 235000019813 microcrystalline cellulose Nutrition 0.000 description 1
- 239000008108 microcrystalline cellulose Substances 0.000 description 1
- 229940016286 microcrystalline cellulose Drugs 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000005543 nano-size silicon particle Substances 0.000 description 1
- 239000011236 particulate material Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 229940088417 precipitated calcium carbonate Drugs 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- ORVGYTXFUWTWDM-UHFFFAOYSA-N silicic acid;sodium Chemical compound [Na].O[Si](O)(O)O ORVGYTXFUWTWDM-UHFFFAOYSA-N 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000010455 vermiculite Substances 0.000 description 1
- 229910052902 vermiculite Inorganic materials 0.000 description 1
- 235000019354 vermiculite 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/0076—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials characterised by the grain distribution
-
- 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/023—Chemical treatment
-
- 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/10—Coating or impregnating
- C04B20/1055—Coating or impregnating with inorganic materials
- C04B20/1066—Oxides, Hydroxides
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a kind of methods for preparing concrete using building waste, belong to building waste and handle the field that is recycled.Specific preparation method includes the following steps: that building waste Coarse Aggregate, building waste fine granules, the ultra-fine pellet of building waste are uniformly mixed by (1), is added to the water, stirs evenly, obtains suspension a；(2) sodium metasilicate is added in suspension a, stirring is completely dissolved sodium metasilicate, and addition acid-conditioning solution PH is 3-5, and alkali is then added, and adjusting solution PH is 7-8, stands to obtain modified building waste；(3) add water in building waste after modification, continue to stir to get unit for uniform suspension b, be uniformly mixed after cement, water-reducing agent are added in suspension b, carry out standard curing.The concrete that the present invention obtains mechanical strength with higher, heat preservation and sound insulation value；And the adhesives such as cement are not added excessively, production cost is low, short preparation period.
Description
Technical field
The invention belongs to building wastes to handle the field that is recycled, and in particular to a kind of to prepare coagulation using building waste
The method of soil.
Background technique
With the further in-depth of China's Urbanization Construction, to adapt to growth requirement, many buildings of the remote past all by
It removes and rebuilds, during removing Old building, produce a large amount of waste and old concrete, masonry, dregs, broken mortar, broken mud etc.
Building waste, the processing and recycling and reusing of building waste have become a big problem of current building trade, the building of early stage
Rubbish is often arbitrarily stacked, and not only influences environmental sanitation, but also cause very big inconvenience to people's lives；Later period is to building waste
Processing mode be landfill disposal, however fill building waste need to occupy a large amount of land resource, may cause top drainage
Decline with flood carrying capacity, or even underground water can be polluted, seriously affected the living environment of the mankind, therefore, selection is appropriate
Mode handle building waste and have become problem in the urgent need to address.Building waste is crushed, it is current for being recycled
One of means generallyd use, common way are to be used to smashed building waste as concrete raw material to prepare coagulation
Soil.
Chinese invention patent CN107382197A (a kind of building waste aggregate concrete and preparation method thereof) by cement, build
Building refuse coarse aggregate, fine aggregate, water, additive etc. be mixed after, obtained building waste aggregate concrete, can fill to
In the steel pipe cavity of arbitrary shape, or in the cavity that is formed of the various building templates of filling, form component after solidification, mechanical property compared with
It is high.This concrete is only that simply building waste is mixed, and only relies on the cementation of additive to assign coagulation
The certain mechanical strength of soil, the building waste self performance as aggregate do not improve, therefore mechanical strength is insufficient, and does not have
There are the performances such as heat preservation, sound insulation.
Chinese invention patent CN108424094A (a kind of building waste/alkaline residue base autoclave aerated concrete building block and its system
Preparation Method) building waste and alkaline residue, lime, cement, gypsum, aluminium powder etc. are uniformly mixed, by steam pressure after moulding by casting
Maintenance has obtained autoclave aerated concrete building block, described due to containing a large amount of calcium carbonate, calcium sulfate, calcium chloride etc. in alkaline residue
Concrete segment can form CSH gel during steam pressure, and final concrete segment has the superiority such as high-strength, lightweight, heat preservation
Energy.Chinese invention patent CN108484074A (a kind of strong concrete brick preparation method) by precipitated calcium carbonate, building waste,
Vermiculite power, polyamide obtain premix a after mixing；By cement, quick lime, blast-furnace cinder, hollow glass microbead, diatomite,
Gravel, microcrystalline cellulose etc. mix to obtain premix b；Vibration-extrusion forms after premix a, premix b, water are mixed, and demoulding is supported
Shield obtains high-intensitive concrete brick, has the advantages that compression strength is high, shrinking percentage is small, good heat insulating.Chinese invention patent
CN108609981 (a kind of concrete brick that heat insulation effect is good) by calcined kaolin, building waste, cinder, silicon nitride compound,
The compounding such as polyurethane resin, cement, land plaster, gangue, obtains that compression strength is good, shrinking percentage is small, the heat preservation of good heat insulating
Brick, wherein it is compound to be that the after chemical reactions such as urea, formaldehyde, nano-silicon nitride, butyl titanate obtain for silicon nitride compound
Object.The effect of building waste just corresponds to filler in above-mentioned three patents, and higher machinery could be generated by depending on cement
Performance, and preparation process is relative complex.
It in summary it can be seen, it is relatively multiple to prepare the process of concrete to being recycled for building waste in the prior art
It is miscellaneous, and only using building waste as filler, do not embody the advantage of building waste.
Summary of the invention
The present invention is problem to be addressed is how the concrete manufactured in the prior art with building waste and underuses building
The advantage of rubbish and the poor technical problem of concrete comprehensive performance obtained.
In order to solve the above-mentioned technical problem, the invention discloses a kind of method for preparing concrete using building waste,
It is characterized in that, includes the following steps:
(1) building waste Coarse Aggregate, building waste fine granules, the ultra-fine pellet of building waste are uniformly mixed, are added to the water,
It stirs evenly, obtains suspension a；
(2) sodium metasilicate is added in suspension a, stirring is completely dissolved sodium metasilicate, and addition acid-conditioning solution PH is 3-5,
Alkali is then added, adjusting solution PH is 7-8, stands to obtain modified building waste；
(3) add water in building waste after modification, continue to stir to get unit for uniform suspension b, water is added in suspension b
It is uniformly mixed after mud, water-reducing agent, carries out standard curing.
Further, the proportion of the building waste Coarse Aggregate, building waste fine granules, the ultra-fine pellet of building waste are as follows:
15-65 parts of building waste Coarse Aggregate
8-60 parts of building waste fine granules
Ultra-fine pellet 3-50 parts of building waste
In addition, the additional amount of cement is 2-10 parts, the additional amount of water-reducing agent is 0.1-3 parts.
Further, the partial size of the building waste Coarse Aggregate is 4.75-5.5mm；The grain of the building waste fine granules
Diameter is 1.6-4.75mm；The partial size of the ultra-fine pellet of building waste is 0.5-1.6mm.
Further, the building waste Coarse Aggregate, building waste fine granules, the ultra-fine pellet of building waste mass ratio be
1:0.2-1.2:0.1-1.0 while the additional amount of building waste Coarse Aggregate is most, building waste fine granules take second place, building waste
The additional amount of ultra-fine pellet is minimum.This is because the size of Coarse Aggregate is big, the accumulation between Coarse Aggregate can generate biggish gap,
If will lead to finally obtained concrete strength without gap filling and be lower, to ensure concrete strength, it is necessary to increase
The dosage of large cement and reinforcing agent, to improve production cost；Less amount of fine granules are added can be partially into Coarse Aggregate
In wide arc gap, and lesser amount of ultra-fine pellet can enter Coarse Aggregate gap, fine granules gap and Coarse Aggregate and fine granules
In gap, to reduce biggish gap between building waste pellet, guarantees the closely knit of concrete structure, improve intensity.However,
If gap between pellet is blocked completely, but will lead to inside concrete pore structure reduce, poor thermal insulation property and than great, because
And the additional amount of fine granules and ultra-fine pellet is controlled, make gap be unlikely to be completely plugged.It is thick by adjusting control building waste
Proportion between pellet, fine granules and ultra-fine pellet, the coagulation of the available internal pore structure with suitable quantity and size
Soil, not only can guarantee the high intensity of concrete, but also can ensure that the good thermal insulation property of concrete.
Further, the acid used in the step (2) is one or more of hydrochloric acid, sulfuric acid, boric acid, citric acid；
The alkali used in the step (2) is one or more of sodium hydroxide, potassium hydroxide, ammonium hydroxide.Under the action of an acid, silicic acid
Sodium hydrolyzes, and obtains silica solution, alkali, silica solution gradually aging is further added, so that it may obtain having Hierarchical porosity structure
Silica hydrogel, silica hydrogel are evenly coated at building waste pellet surface, further enrich in concrete
The pore structure in portion: the pore structure that the accumulation between building waste difference size pellet generates mostly in grade, micron order, it is opposite and
Say that size is larger, and the pore structure inside silica hydrogel is mostly micron order and nanoscale, pore structure more abundant into
One step improves the heat preservation and sound insulation value of concrete.After concrete curing is dry, internal moisture gradually volatilizees, silica
The water of hydrogel internal pore structure is gradually fallen by air displacement, obtains aerosil, aerosil is inherently
With excellent performances such as heat-insulation and heat-preservation, sound absorptions, finally obtained concrete also just has good heat-insulation and heat-preservation, sound insulation etc. excellent
Performance；Aeroge is light, and imparts the light performance of concrete.In order to guarantee that aerosil is comprehensive to concrete
Can contribution be it is optimal, the additional amount of sodium metasilicate is 1-50 parts in parts by mass.
Further, since building waste is mostly waste and old concrete, brick and tile or marble etc., wherein containing carbonate, such as carbon
The inorganic compounds such as sour calcium, magnesium carbonate, carbonate can react with acid in acid condition in step (2), release dioxy
Change the gases such as carbon, so that corresponding position will leave hole in building waste pellet, the presence of these holes enriches coagulation
The pore structure of soil, further reduced the density of finally obtained concrete, and enhance its heat preservation and sound insulation value.
Also, since aerosil belongs to hydrophobic material, when it is coated on building waste pellet surface completely,
The water penetration that system can be reduced, the concrete that the present invention is obtained is used as external wall or attic floor, in continuous rainy days
It can prevent rainwater from penetrating by metope indoor, make building waterproofness with higher.
Further, in the step (3) in suspension b also added with reinforcing agent, high activity fluorine titanium may be selected in reinforcing agent
The mixture of reinforcing agent or styrene-butadiene emulsion, styrene-acrylic emulsion and wollastonite powder.It can be further improved the strong of concrete using reinforcing agent
Degree.
Further, the water-reducing agent is fatty acid series water-reducing agent, casein, naphthalene sulfonate water-reducing agent, polycarboxylic-acid subtract
One or more of aqua, melamine water reducing agent, lignosulfonates.Further, poly carboxylic acid series water reducer is selected, it can
Dispersion performance of the cement in system is improved, the additional amount of water is reduced, the concrete dry required time is reduced, shortens production week
Phase improves production efficiency.
Further, the cement is portland cement, and specific surface area is not less than 6500cm2/ g, strength grade are
52.5 or 62.5.
Further, it needs to carry out wet curing in step (3) the Plays maintenance processes.
The concrete that the present invention is prepared can be separately injected into due to having both high-intensitive, high heat insulating ability, light advantage
Solidify in mold and building block, insulating brick etc. is made separately as construction material use, and is able to satisfy the performance requirement of construction material；Also
It can be poured into building materials cavity, such as be cast in steel pipe, in prefabricated panels, keep the comprehensive performance of building materials more excellent.
Compared with prior art, the method for the invention for preparing concrete using building waste has the advantage that
1, the present invention is by adjusting the additional amount between various sizes of building waste pellet, optimize building waste it is thick,
Carefully, the accumulation form between ultra-fine pellet makes inside concrete have certain pore structure, therefore concrete power with higher
Learn intensity, heat preservation and sound insulation value.
2, the present invention introduces aerosil in concrete structure, and the pore structure of inside concrete is more various
Change, thermal insulation property is more excellent, and reduces the density of concrete, assigns concrete light performance.
3, building waste pellet meets the gases such as acid release carbon dioxide in the present invention, further enriches finally obtained mixed
The pore structure for coagulating soil, reduces the density of concrete, and improve its thermal insulation property.
4, the concrete that the present invention is prepared can individually solidify, and can share with other building materials, have a wide range of application.
5, the adhesives such as cement are not added excessively in the concrete that the present invention is prepared, and production cost is low, and manufacturing cycle
It is short.
Specific embodiment
It is described in detail below by specific embodiment, illustrates technical solution of the present invention.
Embodiment 1
1,50 parts of building waste Coarse Aggregates, 30 parts of building waste fine granules, the ultra-fine pellet of 10 parts of building wastes are added high
In fast blender, it is uniformly mixed, is then slowly added in water, the dosage of water can be such that building waste is just submerged by water completely, stir
Mix uniform suspension a.
2,25 parts of sodium metasilicate are added under stirring condition in suspension a, is completely dissolved sodium metasilicate, hydrochloric acid is then added,
Adjusting solution PH is 3.5, stirs 0.5h；Ammonium hydroxide is then added, adjusting solution PH is 7.5, stands 2h, obtains modified building
Rubbish.
3, suitable quantity of water is added in building waste after modification, continues to stir to get uniform suspension b, and in suspension
After portland cement, 2 parts of poly carboxylic acid series water reducers, 6 parts of high activity fluorine titanium reinforcing agents that 6 parts of strength grades are 62.5 are added in b
It is uniformly mixed, is poured into bricks die, after semidry method compression moulding, taken out, it is primary every 3 days water sprays, in natural conditions
It is lower to use plastic cloth covering curing 15 days, concrete insulating brick is obtained, S1 is denoted as.
Embodiment 2-7
Concrete is prepared according to preparation method same as Example 1, the difference is that changing building waste coarse grain
The proportion and dosage of material, building waste fine granules and the ultra-fine pellet of building waste and sodium metasilicate, are specifically shown in Table 1, obtained mixed
Solidifying native produce is labeled as S2-S7.
Comparative example 1
Compared with Example 1, the difference is that: in the comparative example building waste raw material be used only building waste coarse grain
Material, final concrete product obtained are labeled as B1.
Comparative example 2
Compared with Example 1, the difference is that: in the comparative example building waste raw material be used only building waste particulate
Material, final concrete product obtained are labeled as B2.
Comparative example 3
Compared with Example 1, the difference is that: in the comparative example building waste raw material be used only building waste superfine granule
Material, final concrete product obtained are labeled as B3.
Comparative example 4
Compared with Example 1, the difference is that: sodium metasilicate is added without in the comparative example, step (2) only uses bronsted lowry acids and bases bronsted lowry
Adjust the PH of suspension, final concrete product obtained is labeled as B4.
Comparative example 5
Compared with Example 1, the difference is that: without step (2) in the comparative example, i.e., directly building waste use
Cement, water-reducing agent, reinforcing agent etc. are added in suspension a, carries out curing conservation, final concrete product obtained is labeled as B5.
The various raw materials and consumptions used in above-described embodiment 1-7 and comparative example 1-5 are as shown in table 1 below.
Table 1 prepares each raw materials and consumption that concrete insulating brick is used
Note-acid*: additional amount is related according to the material quantity of actual use, and specific additional amount is by the way that the PH of suspension a to be adjusted to
3.5 determine.
Concrete heat-insulating brick product S1-S7 and B1-B5 are tested for the property, accuracy in order to ensure the test results,
The mold for using identical size during the preparation process keeps concrete insulating brick size obtained identical:
(1) dry density: measurement conserves the density of dry concrete insulating brick obtained.
(2) thermal insulation property: with the thermal coefficient of flat band method measurement concrete insulating brick.
(3) compression strength: according to the side of " standard for test methods of mechanical properties of ordinary concrete " (GB/T50081-2002)
Method measures the compression strength for the dry concrete insulating brick that the embodiment of the present invention and comparative example obtain.
(4) sound insulation value: standing-wave-tube method measures average sound absorption coefficient.
When carrying out above-mentioned performance test, each performance tests 5 or more samples, is finally averaged, test result
Such as the following table 2.
The performance test results of 2 concrete insulating brick of table
Shown in table 2 as above, the concrete insulating brick overall performance that embodiment 1-7 is obtained is better than the production that comparative example 1-5 is obtained
Product illustrate that adopting the concrete insulating brick being obtained by the present invention has good comprehensive performance.
For S1, it can be seen that its comprehensive performance is optimal, illustrates the dosage of building waste Coarse Aggregate, fine granules and ultra-fine pellet
The internal pore structure of concrete insulating brick can rationally optimized, and then makes its best performance.S2 is built relative to S1
The dosage of building refuse fine granules and ultra-fine pellet is on the high side, causes its dry density larger, and thermal coefficient reduces, average sound absorption coefficient
It is lower, it can speculate its internal holes negligible amounts, the structure of concrete insulating brick is more closely knit, therefore compression strength becomes larger.For
S3, relative to S1, the dosage of building waste fine granules and ultra-fine pellet is on the low side, causes its dry density smaller, and thermal coefficient improves,
Average sound absorption coefficient is relatively low, this may be that cannot preferably play heat-insulated and sound absorption properties because mostly inside S3 is macroporous structure
Can, therefore compression strength is also slightly lower.For S4, relative to S1, the additional amount of sodium metasilicate is relatively low, and building waste pellet surface cannot
Complete coated silica aeroge, the inside S4 nano grade pore negligible amounts, therefore heat-insulated and sound insulation value is slightly worse.For S5,
Relative to S1, the additional amount of sodium metasilicate is higher, therefore building waste pellet surface has coated more aerosils, every
Heat and sound insulation value are optimal, but since aerosil is crisp, reduce the pressure resistance of S5 to a certain extent
Degree.For S6, there is certain level, but the additional amount of three between building waste Coarse Aggregate, fine granules and ultra-fine pellet
Less, for the concrete insulating brick of identical size, when materials are less, dry density is naturally just lower, concrete insulating brick
Structure is also just of a relatively loose, therefore compression strength is relatively low；Simultaneously as having between three kinds of varigrained building waste pellets
There is certain dosage level, also there is certain level in the hole in concrete insulating brick, but pore size is relatively large, therefore heat-insulated suction
Acoustic performance is slightly lower, so thermal conductivity ratio S1 is big, average sound absorption coefficient is then smaller than S1.For S7, building waste Coarse Aggregate, particulate
The additional amount of material and ultra-fine pellet is more, and the dosage of three is essentially equal, and materials have led to dry density increase more, but build
When building refuse dosage is more, the amount of cement and reinforcing agent preferably can not carry out bonding enhancing to building waste with regard to relatively fewer, because
This compression strength is still lower；Simultaneously because three kinds of varigrained building waste pellet dosages are equal, finer grain is had led to
Building waste be more packed into the hole that the building waste accumulation compared with coarseness generates, so concrete insulating brick mesoporous
Quantity tails off, and the level richness of pore structure also reduces, therefore heat-insulation and heat-preservation and sound absorbing performance decline, so thermal coefficient is inclined
Height, average sound absorption coefficient are relatively low.
For comparative example, product B1 only joined building waste Coarse Aggregate, so in addition to aerosil produces in B1
Except raw hole, it is macroporous structure that remaining is mostly, the accumulation between building waste Coarse Aggregate, therefore compression strength is lower,
While also result in the pore structure in B1, not abundant enough therefore heat-insulated and sound insulation value is also poor.Building rubbish is only added in product B2
Rubbish fine granules, similar with B1, the pore size in B2 is also relatively large, and compression strength, heat-insulated and sound insulation value are also poor.Product B3
In the ultra-fine pellet of building waste is only added, similarly B3 inner hole structure is also not abundant enough, therefore heat-insulated and sound insulation value is poor.It produces
Without aerosil in product B4, but it is adjusted with acid the PH of system during the preparation process, the carbonate in building waste
It reacts with acid at branch and releases carbon dioxide, generate certain hole inside B4, but the limited amount of this some holes, therefore B4
Heat-insulated and sound insulation value it is poor.It is not also both adjusted with acid it during the preparation process without aerosil in product B5
PH, therefore the minimum number of B5 mesoporous, the level of pore structure is also most not abundant therefore heat-insulated enough and sound insulation value is worst.
Described in synthesis, it can be seen that accumulated between building waste Coarse Aggregate, fine granules and ultra-fine pellet generation hole, acid with
Building waste occurs to chemically react the micron order hole inside the hole and aerosil that release carbon dioxide generation
And nano grade pore, all finally obtained concrete insulating brick comprehensive performance is contributed: when hole is less and level is not abundant, heat preservation
It is poor with sound insulation value；And hole it is more and larger when, the compression strength of concrete insulating brick is lower；Only when building waste coarse grain
Material, the dosage of fine granules and ultra-fine pellet are reasonable, and amount of sodium silicate it is moderate ensure aerosil thickness it is moderate when,
The comprehensive performance of concrete insulating brick is optimal.
The foregoing is merely presently preferred embodiments of the present invention, is not limited to invent, all in design concept of the invention
Within any modification, equivalent replacement, improvement and so on, should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of method for preparing concrete using building waste, which comprises the steps of:
(1) building waste Coarse Aggregate, building waste fine granules, the ultra-fine pellet of building waste are uniformly mixed, are added to the water, stirred
Uniformly, suspension a is obtained；
(2) sodium metasilicate is added in suspension a, stirring is completely dissolved sodium metasilicate, and addition acid-conditioning solution PH is 3-5, then
Alkali is added, adjusting solution PH is 7-8, stands to obtain modified building waste；
(3) in building waste after modification plus water, continue to stir to get unit for uniform suspension b, be added in suspension b cement,
It is uniformly mixed after water-reducing agent, carries out standard curing.
2. the method for preparing concrete using building waste as described in claim 1, it is characterised in that: in terms of mass parts, institute
State the proportion of building waste Coarse Aggregate, building waste fine granules, the ultra-fine pellet of building waste are as follows:
15-65 parts of building waste Coarse Aggregate
8-60 parts of building waste fine granules
Ultra-fine pellet 3-50 parts of building waste.
3. the method for preparing concrete using building waste as described in claim 1, it is characterised in that: the building waste is thick
The partial size of pellet is 4.75-5.5mm；The partial size of the building waste fine granules is 1.6-4.75mm；The building waste is ultra-fine
The partial size of pellet is 0.5-1.6mm.
4. the method for preparing concrete using building waste as claimed in claim 2, it is characterised in that: the building waste is thick
Pellet, building waste fine granules, the ultra-fine pellet of building waste mass ratio be 1:0.2-1.2:0.1-1.0.
5. the method for preparing concrete using building waste as described in claim 1, it is characterised in that: in the step (2)
The acid of addition is one or more of hydrochloric acid, sulfuric acid, boric acid, citric acid；The alkali being added in the step (2) is hydroxide
One or more of sodium, potassium hydroxide, ammonium hydroxide.
6. the method for preparing concrete using building waste as described in claim 1, it is characterised in that: in the step (3)
Also added with reinforcing agent in suspension b.
7. the method for preparing concrete using building waste as described in claim 1, it is characterised in that: the water-reducing agent is rouge
Fat acid based water reducer, casein, naphthalene sulfonate water-reducing agent, poly carboxylic acid series water reducer, melamine water reducing agent, in lignosulfonates
One or more.
8. the method for preparing concrete using building waste as described in claim 1, it is characterised in that: the cement is silicic acid
Salt cement.
9. the method for preparing concrete using building waste as described in claim 1, it is characterised in that: in the step (3)
It needs to carry out wet curing during standard curing.
10. the method for preparing concrete using building waste as claimed in claim 6, it is characterised in that: the reinforcing agent is
The mixture of high activity fluorine titanium reinforcing agent or styrene-butadiene emulsion, styrene-acrylic emulsion and wollastonite powder.
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