CN113429177A - Lightweight building insulation board based on fly ash - Google Patents
Lightweight building insulation board based on fly ash Download PDFInfo
- Publication number
- CN113429177A CN113429177A CN202110806377.6A CN202110806377A CN113429177A CN 113429177 A CN113429177 A CN 113429177A CN 202110806377 A CN202110806377 A CN 202110806377A CN 113429177 A CN113429177 A CN 113429177A
- Authority
- CN
- China
- Prior art keywords
- parts
- fly ash
- insulation board
- heat
- building insulation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000010881 fly ash Substances 0.000 title claims abstract description 74
- 238000009413 insulation Methods 0.000 title claims abstract description 65
- 239000011381 foam concrete Substances 0.000 claims abstract description 70
- 238000000576 coating method Methods 0.000 claims abstract description 51
- 239000011248 coating agent Substances 0.000 claims abstract description 50
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 49
- 239000004568 cement Substances 0.000 claims abstract description 47
- 238000002360 preparation method Methods 0.000 claims abstract description 15
- 239000004088 foaming agent Substances 0.000 claims abstract description 14
- 239000000853 adhesive Substances 0.000 claims abstract description 9
- 230000001070 adhesive effect Effects 0.000 claims abstract description 9
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 8
- 239000002994 raw material Substances 0.000 claims abstract description 7
- 229920005610 lignin Polymers 0.000 claims description 40
- 238000002156 mixing Methods 0.000 claims description 23
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 claims description 20
- 230000003075 superhydrophobic effect Effects 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 15
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 12
- 238000001723 curing Methods 0.000 claims description 11
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 claims description 10
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims description 10
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims description 10
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound 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 10
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 6
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 6
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 4
- DERZBLKQOCDDDZ-JLHYYAGUSA-N cinnarizine Chemical compound C1CN(C(C=2C=CC=CC=2)C=2C=CC=CC=2)CCN1C\C=C\C1=CC=CC=C1 DERZBLKQOCDDDZ-JLHYYAGUSA-N 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 4
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 4
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 3
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 3
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 3
- 239000006228 supernatant Substances 0.000 claims description 3
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims description 2
- 238000005576 amination reaction Methods 0.000 claims description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 2
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims description 2
- 239000001095 magnesium carbonate Substances 0.000 claims description 2
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 claims description 2
- 125000004368 propenyl group Chemical group C(=CC)* 0.000 claims description 2
- 239000000203 mixture Substances 0.000 abstract description 39
- 230000002209 hydrophobic effect Effects 0.000 abstract description 25
- 238000012360 testing method Methods 0.000 description 52
- 239000000463 material Substances 0.000 description 26
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 14
- 238000000465 moulding Methods 0.000 description 14
- 230000000052 comparative effect Effects 0.000 description 12
- 239000011810 insulating material Substances 0.000 description 12
- 239000002023 wood Substances 0.000 description 12
- 238000010521 absorption reaction Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 10
- 229920001577 copolymer Polymers 0.000 description 8
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- 239000000839 emulsion Substances 0.000 description 8
- 239000000047 product Substances 0.000 description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- AVYKQOAMZCAHRG-UHFFFAOYSA-N triethoxy(3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluorooctyl)silane Chemical compound CCO[Si](OCC)(OCC)CCC(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F AVYKQOAMZCAHRG-UHFFFAOYSA-N 0.000 description 8
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 description 7
- 239000006185 dispersion Substances 0.000 description 7
- 238000005187 foaming Methods 0.000 description 7
- 229940089951 perfluorooctyl triethoxysilane Drugs 0.000 description 7
- 239000011148 porous material Substances 0.000 description 7
- 238000005507 spraying Methods 0.000 description 7
- 238000009210 therapy by ultrasound Methods 0.000 description 7
- 238000004506 ultrasonic cleaning Methods 0.000 description 7
- 239000013530 defoamer Substances 0.000 description 6
- 239000012774 insulation material Substances 0.000 description 6
- 238000004321 preservation Methods 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 239000004567 concrete Substances 0.000 description 5
- 238000011161 development Methods 0.000 description 5
- 239000006260 foam Substances 0.000 description 5
- 239000002956 ash Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
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- 239000004570 mortar (masonry) Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 239000011398 Portland cement Substances 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 238000004176 ammonification Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000004134 energy conservation Methods 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 239000011268 mixed slurry Substances 0.000 description 3
- 239000006072 paste Substances 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 235000012239 silicon dioxide Nutrition 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 229920005830 Polyurethane Foam Polymers 0.000 description 2
- 239000006087 Silane Coupling Agent Substances 0.000 description 2
- 239000002518 antifoaming agent Substances 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000010883 coal ash Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000011496 polyurethane foam Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 239000004604 Blowing Agent Substances 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 102000004190 Enzymes Human genes 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 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
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 229920001222 biopolymer Polymers 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229910052595 hematite Inorganic materials 0.000 description 1
- 239000011019 hematite Substances 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000001404 mediated effect Effects 0.000 description 1
- 125000005394 methallyl group Chemical group 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052863 mullite Inorganic materials 0.000 description 1
- 239000005543 nano-size silicon particle Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 150000008442 polyphenolic compounds Chemical class 0.000 description 1
- 235000013824 polyphenols Nutrition 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000004537 pulping Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910021487 silica fume Inorganic materials 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical group [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 description 1
- 235000019982 sodium hexametaphosphate Nutrition 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 239000013076 target substance Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- STCOOQWBFONSKY-UHFFFAOYSA-N tributyl phosphate Chemical group CCCCOP(=O)(OCCCC)OCCCC STCOOQWBFONSKY-UHFFFAOYSA-N 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Classifications
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- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
- C04B18/08—Flue dust, i.e. fly ash
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/18—Waste materials; Refuse organic
- C04B18/24—Vegetable refuse, e.g. rice husks, maize-ear refuse; Cellulosic materials, e.g. paper, cork
- C04B18/26—Wood, e.g. sawdust, wood shavings
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/16—Sulfur-containing compounds
- C04B24/20—Sulfonated aromatic compounds
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/52—Multiple coating or impregnating multiple coating or impregnating with the same composition or with compositions only differing in the concentration of the constituents, is classified as single coating or impregnation
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/60—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only artificial stone
- C04B41/61—Coating or impregnation
- C04B41/70—Coating or impregnation for obtaining at least two superposed coatings having different compositions
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/66—Sealings
- E04B1/665—Sheets or foils impervious to water and water vapor
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- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/76—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
- E04B1/78—Heat insulating elements
- E04B1/80—Heat insulating elements slab-shaped
-
- C—CHEMISTRY; METALLURGY
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- 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
- C04B2111/00482—Coating or impregnation materials
- C04B2111/00508—Cement paints
-
- 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
- C04B2111/00612—Uses not provided for elsewhere in C04B2111/00 as one or more layers of a layered structure
-
- 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
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
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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
- 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
-
- 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 discloses a lightweight building insulation board based on fly ash. The light building insulation board comprises a foam concrete insulation layer and a hydrophobic coating. The foam concrete heat-insulating layer is prepared from the following raw materials in parts by weight: 40-50 parts of cement, 15-35 parts of fly ash, 3-8 parts of sawdust, 2-5 parts of water, 0.1-0.2 part of foaming agent, 1-5 parts of adhesive and 1-1.5 parts of water reducing agent. The invention also provides a preparation method of the composition. Compared with the prior art, the insulation board prepared by the invention has the advantages of high compressive strength, good insulation performance, good waterproofness and the like.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to a light building insulation board based on fly ash.
Background
With the gradual deepening of energy conservation and emission reduction and environmental protection consciousness, the heat preservation of the outer wall of the building is slowly accepted and paid attention by people, but the development of building energy conservation in China starts late, and the building has a great gap compared with developed countries. The main reason for this is that the building envelope has a relatively large heat transfer coefficient, such as the commonly used masonry and concrete, which are generally poor in heat insulation. On the contrary, the heat insulation material with small heat conductivity coefficient can increase the composite heat transfer resistance of the building envelope structure, reduce the heat transfer coefficient, reduce the influence of the change of the outside air temperature on the indoor temperature and improve the heat insulation performance of the building. Therefore, the development of novel heat-insulating and energy-saving materials is necessary.
At present, the common wall heat-insulating materials for building energy conservation can be divided into two types from the formation mode: thermal insulation mortar and thermal insulation board. The main components of the material can be divided into organic and inorganic heat-insulating materials. Mortar type heat insulating materials have relatively high heat conductivity coefficients, and need to be stirred on a construction site and then subjected to two coating processes, so that the construction period is long. Compared with mortar heat-insulating materials, the plate heat-insulating material has low cost, high strength, light weight and good heat-insulating effect, can be prefabricated and realizes automatic production; the finished product can be cut and assembled on site, and the construction efficiency is improved. In the market of heat insulation materials in China, the heat insulation plate is a heat insulation material which is widely applied at present.
The organic heat-insulating board has the advantages of good heat-insulating property, light weight, good processability and the like. Meanwhile, the organic heat-insulating material is easy to deform, age and burn to cause fire, the raw materials used for producing the organic heat-insulating material have poor ecological performance, the raw materials required for production are limited, recycling is difficult to realize, and the organic heat-insulating material is contrary to the existing sustainable development concept. Therefore, in recent years, the transition from organic to inorganic building insulation boards is gradually obvious, and inorganic insulation materials have been the trend in the building industry and are also the direction of history and technological development. The inorganic heat-insulating material has obvious fire resistance, deformation coefficient and safety, and in addition, the inorganic heat-insulating material has simple construction process and good environmental protection property, and can be recycled in production.
Among a plurality of inorganic heat insulation materials, the foamed cement heat insulation board is widely concerned by scholars at home and abroad due to the excellent performance of the foamed cement heat insulation board, and the foamed cement heat insulation board is a porous light material which is prepared by mixing cement with a proper foaming agent and the like, mixing materials, lime and other siliceous materials (fly ash and silica fume), and stirring, pouring, forming and cutting the mixture. The foamed cement heat-insulating board is a new light heat-insulating material containing a large number of closed pores. Due to the special processing technology, the foamed cement insulation board has a plurality of advantages compared with other traditional insulation materials.
Fly ash, one of siliceous materials, is ash left after burning coal dust of thermal power plants, and is an industrial waste. The fly ash is a group formed by simply and mechanically mixing various burned coal ash particles, wherein most of the fly ash are spherical glass bodies, the specific surface area is large, and the mineral composition of the fly ash is mainly glass phase, quartz, mullite phase, magnetite, hematite and the like and a small amount of unburned coal particles. The main active component of the fly ash is SiO2And Al2O3The active silica and the active alumina can react with calcium hydroxide to generate calcium silicate hydrate with gelling property. The higher the content of active substances is, the higher the volume weight and the strength of a hardened body are, and the better the performance of the heat insulation board is.
However, at present, a relatively obvious disadvantage of the foamed cement insulation board is that the strength of the foamed cement insulation board is not high enough, and the foamed cement insulation board is a technical problem which needs to be solved for a long time. In the actual production process, the dry density, the heat conductivity coefficient and other properties of the foamed cement product can meet the index requirements, and the conditions of unqualified compressive strength and water absorption rate are often found. After the foaming cement absorbs water, the mechanical property and the heat preservation effect of the foaming cement are obviously reduced, the problem is particularly obvious in a low-temperature environment, the strength is reduced due to the increase of the internal water content, even the structural damage is caused, and the service life of a foaming cement product is seriously influenced. Excellent water resistance and compressive strength are particularly important for the durability of the material.
Chinese patent CN 103011879B discloses an inorganic foaming cement insulation board and a preparation method thereof, the main raw materials are cement, fly ash, nano hollow micro-beads and the like, the invention adopts new materials such as nano hollow micro-beads, active nano silicon dioxide and the like to reduce the weight of the inorganic foaming cement insulation board, and the invention is energy-saving and environment-friendly; chinese patent CN 103833413B discloses a foamed cement insulation board and a manufacturing method thereof, wherein cement, fly ash aluminum extraction residues, a foaming agent, a foam stabilizer and water are mixed to form mixed slurry; and placing the mixed slurry in a mold for foaming, and removing the mold for curing to obtain the foamed insulation board. However, most of the foamed cement insulation boards in the prior art have the problems of low compressive strength and high water absorption, so that the development of a light building insulation board with good waterproof performance is very important.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art, and provides a lightweight building insulation board based on fly ash and a preparation method thereof.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
the lightweight building insulation board based on the fly ash comprises a foam concrete insulation layer and a hydrophobic coating. The foam concrete heat-insulating layer is prepared from the following raw materials in parts by weight: 40-50 parts of cement, 15-35 parts of fly ash, 3-8 parts of sawdust, 2-5 parts of water, 0.1-0.2 part of foaming agent, 1-5 parts of adhesive and 1-1.5 parts of water reducing agent. And uniformly mixing the cement, the fly ash and the wood chips to obtain a mixture, adding water, sodium bicarbonate, an adhesive and hydroxypropyl methyl cellulose, gradually and uniformly mixing, filling the mixed slurry into a mold for molding, and immediately removing the mold for maintenance after molding to obtain the foam concrete heat-insulating layer.
The hydrophobic coating comprises an ultrafine fly ash-based hydrophobic layer and a super-hydrophobic surface coating, and is prepared by the following method: adding 10-20 parts by weight of water into 40-50 parts by weight of styrene-acrylate copolymer emulsion; adding 0.01-0.05 part by weight of a dispersing agent and 0.02-0.03 part by weight of a defoaming agent into the mixture, mixing the mixture in a high-speed dispersion machine for 1-2 min, adding 50-60 parts by weight of ultrafine fly ash and 30-40 parts by weight of cement, and stirring for 5-8 min; coating the mixture on the surface of the cured foam concrete heat-insulating layer; the superhydrophobic surface coating was prepared as follows: dissolving 1-2 parts of silane coupling agent in 45-50 parts of ethanol by weight, adding 10-12 parts of ultrafine fly ash by weight, performing ultrasonic treatment for 15-20 min by using an ultrasonic cleaning machine to obtain a super-hydrophobic surface coating, and uniformly spraying the super-hydrophobic surface coating on the ultrafine fly ash-based hydrophobic layer.
More preferably, the adhesive is prepared from polymeric diphenylmethane diisocyanate, modified lignin and labyrine according to the weight ratio of (2-4): 2:1 by mass ratio.
Further preferably, the modified lignin is prepared by the following method: carrying out an amination reaction on lignin, 25-30% of hydrogen peroxide and 20-25% of ammonia water by mass percent, wherein the lignin: hydrogen peroxide: and (2) ammonia water with the mass ratio of 1:2:2, filtering after the reaction is finished, drying the obtained supernatant, and grinding into powder to obtain the modified lignin.
Preferably, the foaming agent is any one of calcium carbonate, magnesium carbonate and sodium bicarbonate.
Preferably, the water reducing agent is any one of methacrylic acid, propenyl polyoxyethylene ether, methallyl polyoxyethylene ether and hydroxypropyl methyl cellulose.
More preferably, the curing method comprises: and curing the heat-insulating plate for 5-7 days under the conditions that the temperature is 20-25 ℃ and the relative humidity is 95-98% RH.
Preferably, the dispersant is sodium hexametaphosphate.
Preferably, the defoaming agent is tributyl phosphate.
Compared with the prior art, the invention has the following advantages: according to the invention, the coal ash and the wood dust are used as base materials to prepare the foam concrete, and the polymeric diphenylmethane diisocyanate, the modified lignin and the dune forest are added as the adhesive, so that the compressive strength of the foam concrete is obviously enhanced compared with the foam concrete in the prior art, the modified lignin and the dune forest are added to play a role in synergy, and the thermal conductivity coefficient of the foam concrete is reduced. The waterproof and heat-insulation plate made of the foam concrete of the best embodiment has good waterproof performance, compression resistance and heat-insulation effect.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention is further described in detail with reference to the following examples.
And collecting the fly ash in a Wuhan Qingshan power plant. The main component of fine solid particles in the ash content of flue gas generated by fuel combustion is silicon dioxide (SiO)2) Alumina (Al)2O3) And iron oxide (Fe)2O3) And the invention can be used as filling material to reduce the density of foam concrete.
The cement is ordinary Portland cement PO42.5R purchased from cement factories in New Zhou area of Wuhan province. The cement used in the present invention is portland cement or ordinary portland cement and is used as the matrix of foamed concrete.
And collecting the wood chips in Wuhan Yonghong wood processing factory. As one of light base materials of the foam concrete, the foam concrete has the characteristics of light weight and good heat insulation effect.
Lignin, CAS No. 8068-03-9, was purchased from Shanghai Allantin Biotech. Lignin is one of the most abundant natural resources in the world, accounting for 30% of the largest number of renewable resources. It is an amorphous polyphenol biopolymer formed from three different types of propiophenonates by enzyme-mediated dehydropolymerization. Due to its high calorific value, most of the recovered lignin is used as combustible in the pulping process, only 2% being used in other fields. Because the chemical structure of the polymeric diphenylmethane diisocyanate has a plurality of hydroxyl groups, the polymeric diphenylmethane diisocyanate has high affinity to lignin, and the addition of part of the lignin in the thermal insulation board can obviously reduce the dosage of the polymeric diphenylmethane diisocyanate.
Dunaline, CAS number 8004-99-7, was purchased from Nanjing Dollae Biotechnology, Inc.
Polymeric diphenylmethane diisocyanate, CAS No. 101-68-8, Hubei Xin run chemical Co., Ltd.
Styrene-acrylate copolymer emulsion, model kpl-54106, available from Kepler Biochemical Co., Ltd, Shandong.
The water reducing agent is hydroxypropyl methylcellulose, has the CAS number of 9004-65-3 and is purchased from Nantong Runfeng petrochemical company Limited. The water reducing agent is an additive which can keep the workability of cement paste, mortar and concrete unchanged and obviously reduce the mixing water consumption, and can obviously improve the strength of the concrete, improve the frost resistance and impermeability of the concrete or reduce the cement consumption.
The foaming agent is sodium bicarbonate. The foaming agent is a substance for forming pores in a target substance and can be classified into a chemical foaming agent, a physical foaming agent and a surfactant. The chemical foaming agent is a compound which can release gases such as carbon dioxide, nitrogen and the like after being heated and decomposed and form pores in the polymer composition; physical blowing agents are compounds formed by a change in the physical form of a substance, i.e. by expansion of a compressed gas, volatilization of a liquid or dissolution of a solid. The foaming agents have higher surface activity, can effectively reduce the surface tension of liquid, are arranged on the surface of a liquid film in a double-electron layer mode to surround air to form bubbles, and then form foam by single bubbles, so that the foaming effect is achieved in foam coagulation, and pores are increased.
The silane coupling agent was perfluorooctyltriethoxysilane, CAS number 51851-37-7, available from Shanghai blue Chemicals, Inc.
The test example of the invention adopts the following test indexes and methods:
material strength: the material strength is an important physical index for testing the insulation board, the strength of the insulation board comprises three items of compressive strength, flexural strength and impact strength, wherein the compressive strength is widely concerned, and particularly which strength index is emphasized, and the material strength is determined according to the application occasion of a field product. The compressive strength of the foam concrete is measured according to JG/T266-.
Pouring the foam concrete obtained in the comparative example and the embodiment into a testing mold, preparing a sample according to requirements, and placing the sample on a pressure bearing plate of a testing machine to enable the center of the pressure bearing plate of the testing machine to coincide with the center of the sample. And starting the testing machine, and adjusting the ball seat when the upper pressing plate is close to the test piece to enable the pressure surface of the test piece to be in uniform contact with the pressure bearing plate. The test piece was loaded at a speed of (10. + -.1) mm/min until the test piece was destroyed, and the compression deformation value was recorded. When the test piece did not fail at 5% compressive deformation, the load at 5% compressive deformation of the test piece was the failure load. The failure load P was recorded to 10N accuracy.
And (4) calculating and evaluating results: the compressive strength of each test piece was calculated to the nearest 0.01MPa according to the following formula:
in the formula: sigma is the compressive strength of the test piece, and the unit is megapascal (MPa); p1The breaking load of the test piece is expressed in newtons (N), and the pressed area of the S test piece is expressed in square millimeters (mm)2)。
The heat conductivity coefficient determination method comprises the following steps: according to the standard of 'testing the steady-state thermal resistance of the heat-insulating material and the related characteristics of the protective hot plate method', the foam concrete obtained in the comparative example and the embodiment is poured into a testing mould and is made into a test sample according to the requirement, the test sample is a cylindrical test piece with the diameter of 0.3m, and the number of each group of test pieces is 3. The test adopts a TPMBE-300-III type flat plate heat conduction instrument produced by Chinese architectural science research institute. One side of the instrument is a hot plate, the other side is a cold plate, a uniform plate-shaped test piece with a certain thickness and a parallel surface is clamped between the two plates, then one-dimensional constant heat flow of an infinite flat plate which is bounded by the two parallel uniform temperature flat plates in an ideal state is established by setting the temperatures of the two plates, the heat flow Q of the central metering plate of the hot plate after reaching a steady state is measured, and the heat conductivity coefficient lambda of the test piece is obtained according to a calculation formula of heat resistance.
The heat conductivity coefficient calculation formula is as follows:
in the formula: lambda is the thermal conductivity of the test piece (W/m X K)
Q is the average heating power of the metering part of the heating unit, W;
delta t is the temperature difference of the cold plate and the hot plate of the test piece, K;
a is the area of the central hot plate, m2The area of the central hot plate of the device is 0.025m2；
d is the average thickness of the test piece, m.
And (3) water absorption measurement: the lightweight building insulation panel based on fly ash was produced according to the procedure of example 4 in accordance with the requirements of the national standard GBT5486-2008 "test method for inorganic rigid thermal insulation products", in a form having a length, a width of about 400mm x 300mm and a thickness of the product. Drying the sample to constant mass, cooling to room temperature, and weighing the dried test piece to obtain a sample with a mass G0To the nearest 0.1 g. The sample is placed in tap water with the temperature of 20 +/-5 ℃, the water surface is 25mm higher than the test piece, and the soaking time is 2 hours. And immediately taking out the test piece after 2h, vertically placing the test piece on a towel with the water being wrung out, and draining for 10 min. The residual water adsorbed on the surface of the test piece was removed by suction with a flexible polyurethane foam (sponge), and each surface was allowed to absorb water for 1min each time. Before absorbing water, the flexible polyurethane foam (sponge) is squeezed out with force, and each surface absorbs water at least twice. Immediately weighing the wet mass G of the test piece after the residual moisture on each surface of the test piece is absorbed1To the nearest 0.1 g.
The mass water absorption of the sample is calculated according to the formula:
in the formula: wz is the mass water absorption of the test piece;
G1the wet mass of the test piece after being soaked in water is kilogram (Kg);
G0the dry mass of the test piece before immersion in water is given in kilograms (Kg).
Example 1
A lightweight building insulation board based on fly ash is prepared by the following method:
respectively taking 40 parts of cement, 20 parts of fly ash, 3 parts of wood chips and 2 parts of water, uniformly mixing the materials to obtain a mixture, respectively adding 0.1 part of sodium bicarbonate, 2 parts of polymeric diphenylmethane diisocyanate, 1.5 parts of modified lignin and 1 part of hydroxypropyl methyl cellulose into the mixture, and gradually and uniformly mixing to obtain foam concrete; placing the foam concrete into a mold for molding, immediately removing the mold after molding, and maintaining for 7 days under the conditions of the temperature of 25 ℃ and the relative humidity of 95% RH to obtain a foam concrete heat-insulating layer;
adding 16 parts by weight of water to 50 parts by weight of styrene-acrylate copolymer emulsion; then 0.02 part by weight of dispersant and 0.02 part by weight of defoamer are added into the mixture and mixed for 1min in a high-speed dispersion machine, 60 parts by weight of ultrafine fly ash and 40 parts by weight of cement are added into the mixture, and the mixture is stirred for 5min at 600rpm to obtain the hydrophobic base layer coating; uniformly coating the hydrophobic base layer coating on the surface of the foam concrete heat-insulating layer;
dissolving 1 weight part of perfluorooctyl triethoxysilane in 45 weight parts of ethanol, adding 10 weight parts of ultrafine fly ash, performing ultrasonic treatment for 20min at 40kHz by using an ultrasonic cleaning machine to obtain a super-hydrophobic surface coating, and uniformly spraying the super-hydrophobic surface coating on the surface of the foam concrete heat-insulating layer coated with the hydrophobic base layer coating to obtain a heat-insulating plate; and (3) placing the heat-insulating plate in the condition of 25 ℃ and 95% RH relative humidity for curing for 7 days to obtain the light building heat-insulating plate based on the fly ash.
The preparation method of the modified lignin comprises the following steps: carrying out an ammonification reaction on lignin, 25 mass percent of hydrogen peroxide and 20 mass percent of ammonia water, wherein the weight percentage of the lignin: hydrogen peroxide: and (2) ammonia water with the mass ratio of 1:2:2, filtering after the reaction is finished, drying the obtained supernatant, and grinding into powder to obtain the modified lignin.
Example 2
A lightweight building insulation board based on fly ash is prepared by the following method:
respectively taking 40 parts of cement, 20 parts of fly ash, 3 parts of wood chips and 2 parts of water, uniformly mixing the materials to obtain a mixture, respectively adding 0.1 part of sodium bicarbonate, 2 parts of polymeric diphenylmethane diisocyanate, 1 part of modified lignin, 0.5 part of dunalin and 1 part of hydroxypropyl methyl cellulose into the mixture, and gradually and uniformly mixing to obtain foam concrete; placing the foam concrete into a mold for molding, immediately removing the mold after molding, and maintaining for 7 days under the conditions of the temperature of 25 ℃ and the relative humidity of 95% RH to obtain a foam concrete heat-insulating layer;
adding 16 parts by weight of water to 50 parts by weight of styrene-acrylate copolymer emulsion; then 0.02 part by weight of dispersant and 0.02 part by weight of defoamer are added into the mixture and mixed for 1min in a high-speed dispersion machine, 60 parts by weight of ultrafine fly ash and 40 parts by weight of cement are added into the mixture, and the mixture is stirred for 5min at 600rpm to obtain the hydrophobic base layer coating; uniformly coating the hydrophobic base layer coating on the surface of the foam concrete heat-insulating layer;
dissolving 1 weight part of perfluorooctyl triethoxysilane in 45 weight parts of ethanol, adding 10 weight parts of ultrafine fly ash, performing ultrasonic treatment for 20min at 40kHz by using an ultrasonic cleaning machine to obtain a super-hydrophobic surface coating, and uniformly spraying the super-hydrophobic surface coating on the surface of the foam concrete heat-insulating layer coated with the hydrophobic base layer coating to obtain a heat-insulating plate; and (3) placing the heat-insulating plate in the condition of 25 ℃ and 95% RH relative humidity for curing for 7 days to obtain the light building heat-insulating plate based on the fly ash.
The preparation method of the modified lignin is the same as that of example 1, and the details are not repeated here.
Example 3
A lightweight building insulation board based on fly ash is prepared by the following method:
respectively taking 40 parts of cement, 20 parts of fly ash, 3 parts of wood chips and 2 parts of water, uniformly mixing the materials to obtain a mixture, respectively adding 0.1 part of sodium bicarbonate, 2 parts of polymeric diphenylmethane diisocyanate, 1.5 parts of Dulin and 1 part of hydroxypropyl methyl cellulose into the mixture, and gradually and uniformly mixing to obtain foam concrete; placing the foam concrete into a mold for molding, immediately removing the mold after molding, and maintaining for 7 days under the conditions of the temperature of 25 ℃ and the relative humidity of 95% RH to obtain a foam concrete heat-insulating layer;
adding 16 parts by weight of water to 50 parts by weight of styrene-acrylate copolymer emulsion; then 0.02 part by weight of dispersant and 0.02 part by weight of defoamer are added into the mixture and mixed for 1min in a high-speed dispersion machine, 60 parts by weight of ultrafine fly ash and 40 parts by weight of cement are added into the mixture, and the mixture is stirred for 5min at 600rpm to obtain the hydrophobic base layer coating; uniformly coating the hydrophobic base layer coating on the surface of the foam concrete heat-insulating layer;
dissolving 1 weight part of perfluorooctyl triethoxysilane in 45 weight parts of ethanol, adding 10 weight parts of ultrafine fly ash, performing ultrasonic treatment for 20min at 40kHz by using an ultrasonic cleaning machine to obtain a super-hydrophobic surface coating, and uniformly spraying the super-hydrophobic surface coating on the surface of the foam concrete heat-insulating layer coated with the hydrophobic base layer coating to obtain a heat-insulating plate; and (3) placing the heat-insulating plate in the condition of 25 ℃ and 95% RH relative humidity for curing for 7 days to obtain the light building heat-insulating plate based on the fly ash.
The preparation method of the modified lignin is the same as that of example 1, and the details are not repeated here.
Example 4
A lightweight building insulation board based on fly ash is prepared by the following method:
respectively taking 40 parts of cement, 20 parts of fly ash, 3 parts of wood chips and 2 parts of water, uniformly mixing the materials to obtain a mixture, respectively adding 0.1 part of sodium bicarbonate, 2 parts of polymeric diphenylmethane diisocyanate, 2 parts of modified lignin, 1 part of dunalin and 1 part of hydroxypropyl methyl cellulose into the mixture, and gradually and uniformly mixing to obtain foam concrete; placing the foam concrete into a mold for molding, immediately removing the mold after molding, and maintaining for 7 days under the conditions of the temperature of 25 ℃ and the relative humidity of 95% RH to obtain a foam concrete heat-insulating layer;
adding 16 parts by weight of water to 50 parts by weight of styrene-acrylate copolymer emulsion; then 0.02 part by weight of dispersant and 0.02 part by weight of defoamer are added into the mixture and mixed for 1min in a high-speed dispersion machine, 60 parts by weight of ultrafine fly ash and 40 parts by weight of cement are added into the mixture, and the mixture is stirred for 5min at 600rpm to obtain the hydrophobic base layer coating; uniformly coating the hydrophobic base layer coating on the surface of the foam concrete heat-insulating layer;
dissolving 1 weight part of perfluorooctyl triethoxysilane in 45 weight parts of ethanol, adding 10 weight parts of ultrafine fly ash, performing ultrasonic treatment for 20min at 40kHz by using an ultrasonic cleaning machine to obtain a super-hydrophobic surface coating, and uniformly spraying the super-hydrophobic surface coating on the surface of the foam concrete heat-insulating layer coated with the hydrophobic base layer coating to obtain a heat-insulating plate; and (3) placing the heat-insulating plate in the condition of 25 ℃ and 95% RH relative humidity for curing for 7 days to obtain the light building heat-insulating plate based on the fly ash.
Comparative example 1
A lightweight building insulation board based on fly ash is prepared by the following method:
respectively taking 40 parts of cement, 20 parts of fly ash, 3 parts of wood chips and 2 parts of water, uniformly mixing the materials to obtain a mixture, respectively adding 0.1 part of sodium bicarbonate, 2 parts of polymeric diphenylmethane diisocyanate and 1 part of hydroxypropyl methyl cellulose into the mixture, and gradually and uniformly mixing to obtain foam concrete; placing the foam concrete into a mold for molding, immediately removing the mold after molding, and maintaining for 7 days under the conditions of the temperature of 25 ℃ and the relative humidity of 95% RH to obtain a foam concrete heat-insulating layer;
adding 16 parts by weight of water to 50 parts by weight of styrene-acrylate copolymer emulsion; then 0.02 part by weight of dispersant and 0.02 part by weight of defoamer are added into the mixture and mixed for 1min in a high-speed dispersion machine, 60 parts by weight of ultrafine fly ash and 40 parts by weight of cement are added into the mixture, and the mixture is stirred for 5min at 600rpm to obtain the hydrophobic base layer coating; uniformly coating the hydrophobic base layer coating on the surface of the foam concrete heat-insulating layer;
dissolving 1 weight part of perfluorooctyl triethoxysilane in 45 weight parts of ethanol, adding 10 weight parts of ultrafine fly ash, performing ultrasonic treatment for 20min at 40kHz by using an ultrasonic cleaning machine to obtain a super-hydrophobic surface coating, and uniformly spraying the super-hydrophobic surface coating on the surface of the foam concrete heat-insulating layer coated with the hydrophobic base layer coating to obtain a heat-insulating plate; and (3) placing the heat-insulating plate in the condition of 25 ℃ and 95% RH relative humidity for curing for 7 days to obtain the light building heat-insulating plate based on the fly ash.
Comparative example 2
A lightweight building insulation board based on fly ash is prepared by the following method:
respectively taking 40 parts of cement, 20 parts of fly ash, 3 parts of wood chips and 2 parts of water, uniformly mixing the materials to obtain a mixture, respectively adding 0.1 part of sodium bicarbonate, 2 parts of polymeric diphenylmethane diisocyanate, 1 part of lignin and 1 part of hydroxypropyl methyl cellulose into the mixture, and gradually and uniformly mixing to obtain foam concrete; placing the foam concrete into a mold for molding, immediately removing the mold after molding, and maintaining for 7 days under the conditions of the temperature of 25 ℃ and the relative humidity of 95% RH to obtain a foam concrete heat-insulating layer;
adding 16 parts by weight of water to 50 parts by weight of styrene-acrylate copolymer emulsion; then 0.02 part by weight of dispersant and 0.02 part by weight of defoamer are added into the mixture and mixed for 1min in a high-speed dispersion machine, 60 parts by weight of ultrafine fly ash and 40 parts by weight of cement are added into the mixture, and the mixture is stirred for 5min at 600rpm to obtain the hydrophobic base layer coating; uniformly coating the hydrophobic base layer coating on the surface of the foam concrete heat-insulating layer;
dissolving 1 weight part of perfluorooctyl triethoxysilane in 45 weight parts of ethanol, adding 10 weight parts of ultrafine fly ash, performing ultrasonic treatment for 20min at 40kHz by using an ultrasonic cleaning machine to obtain a super-hydrophobic surface coating, and uniformly spraying the super-hydrophobic surface coating on the surface of the foam concrete heat-insulating layer coated with the hydrophobic base layer coating to obtain a heat-insulating plate; and (3) placing the heat-insulating plate in the condition of 25 ℃ and 95% RH relative humidity for curing for 7 days to obtain the light building heat-insulating plate based on the fly ash.
Test example 1
The compressive strength tests were conducted on the foamed concretes of examples 1 to 4 and comparative examples 1 and 2, and the compressive strength after 28d of the foamed concrete of the above examples and comparative examples was measured. The greater the compressive strength, the better the compressive property of the test piece, and the specific test results are shown in table 1. The properties of the foamed concrete are affected by many factors, such as the properties of cement, fly ash, foaming agent, water reducing agent and other auxiliary materials as raw materials, and also the mix ratio of the foamed concrete base material. In the foam concrete, along with the increase of the mixing amount of the fly ash, the tensile strength and the compressive strength of the foam concrete are obviously reduced, because the matrix formed by hardening cementitious materials such as cement and the like plays a main role in the tensile strength and the compressive strength of the insulation board in the insulation paste, but because the fly ash has lower compressive strength, the fly ash is dispersed in the insulation paste, the porosity of the hardened cement matrix is obviously increased, and the compactness of the foam concrete is reduced.
As can be seen from table 1, the fly ash and the wood chips are tightly bonded together by the polymeric diphenylmethane diisocyanate to enhance the toughness of the foamed concrete, but the polymeric diphenylmethane diisocyanate as the binder is not added in an excessive amount from the viewpoint of environmental protection. Comparing example 1 with comparative example 1, it was found that the compressive strength of the foamed concrete was significantly increased with the addition of the modified lignin. On the other hand, after the drainage pipe is added with the drainage pipe, the compressive strength of the foam concrete is further improved, and the compressive strength of the foam concrete is gradually enhanced along with the increase of the addition amount of the drainage pipe and the drainage pipe. The comparison example 1 and the comparison example 2 find that the effect of the common lignin is not obvious, probably because the polymeric diphenylmethane diisocyanate shows higher affinity to the lignin after the lignin is modified by the ammonification treatment, the solubility of the ammonification lignin is far higher than that of the common lignin, the internal structure of the foam concrete is more compact after the pulp is mixed, and the compressive strength of the foam concrete is improved. In addition, the addition of the ammonium lignin and the labyrin can reduce the consumption of the polymeric diphenylmethane diisocyanate to a certain extent, thereby achieving the effect of environmental protection.
TABLE 1 compression resistance test results of foam concrete
| Examples | Compressive strength (MPa) |
| Example 1 | 2.08 |
| Example 2 | 2.33 |
| Example 3 | 2.12 |
| Example 4 | 2.56 |
| Comparative example 1 | 1.70 |
| Comparative example 2 | 1.89 |
Test example 2
The foam concrete in examples 1 to 4 and comparative examples 1 and 2 were subjected to a thermal conductivity test, and the smaller the thermal conductivity, the better the thermal insulation performance of the material, and the test results are shown in table 2. The light hollow micro-beads and the volcanic ash in the fly ash are active, the heat preservation and the light weight of the material can be improved by adding the light hollow micro-beads and the volcanic ash into cement, the heat conductivity coefficient of the solid matter content is larger than that of air, the porous material generally has better heat preservation and heat insulation, and the heat preservation performance of the material can be further improved by mixing wood dust with smaller heat conductivity coefficient into the concrete. As can be seen from table 2, the addition of ordinary lignin and modified lignin has no significant effect on the thermal conductivity of the foam concrete, but with the addition of water-soluble padulin, the thermal conductivity of the foam concrete is significantly reduced, which may be because the ratio of the modified lignin to padulin absorbs a large amount of moisture in the foam concrete, and the thermal conductivity of liquid water is much greater than that of air in the pores. Therefore, the addition of the modified lignin and the labyrin is beneficial to improving the heat preservation performance of the foam concrete.
TABLE 2 thermal conductivity test results for foam concrete
| Examples | Coefficient of thermal conductivity (W/m X K) |
| Example 1 | 0.077.25 |
| Example 2 | 0.059.85 |
| Example 3 | 0.075.12 |
| Example 4 | 0.055.38 |
| Comparative example 1 | 0.078.76 |
| Comparative example 2 | 0.073.19 |
Test example 3
The lightweight building insulation board based on fly ash obtained in example 4 is subjected to a water absorption test, and the test result is shown in table 3, wherein the lower the water absorption is, the better the waterproof performance of the board is. The fly ash added into the light building material can reduce the using amount of cement, and before the activity of the fly ash is not exerted, the formed hardened stone structure is looser, the proportion of large foam holes is increased, the middle holes are reduced, and the connectivity among the foam holes is increased due to the increase of the large holes, so that the water absorption rate of the board is higher, but the problem of poor waterproof performance of the light insulation board can be effectively improved due to the addition of the hydrophobic coating. The hydrophobic coating prepared by the invention is uniformly mixed with cement and ultrafine fly ash, and generates an inorganic-organic composite gel product after a crosslinking reaction. The gel products are deposited and gathered around the powder particles of the coating system, the pore diameter of the coating is reduced, the internal structure is refined and compact, and the waterproof performance of the insulation board is improved.
Table 3 water absorption test results of insulation board
| Examples | Water absorption (%) |
| Example 4 | 4.9 |
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (9)
1. A preparation method of a lightweight building insulation board based on fly ash is characterized by comprising the following steps: which comprises the following steps: manufacturing a foam concrete heat-insulating layer, coating the super-hydrophobic coating on the surface, and curing to obtain the light building heat-insulating plate;
the foam concrete heat-insulating layer comprises the following raw materials in parts by weight: 40-50 parts of cement, 15-35 parts of fly ash, 3-8 parts of sawdust, 2-5 parts of water, 0.1-0.2 part of foaming agent, 1-5 parts of adhesive and 1-1.5 parts of water reducing agent.
2. The preparation method of the light building insulation board based on fly ash as claimed in claim 1, characterized in that: the adhesive is composed of polymeric diphenylmethane diisocyanate, modified lignin and sudumin.
3. The preparation method of the light building insulation board based on fly ash as claimed in claim 2, characterized in that: the adhesive is formed by mixing polymeric diphenylmethane diisocyanate, modified lignin and the labyrin according to the mass ratio of (2-4) to 2: 1.
4. The preparation method of the light building insulation board based on fly ash as claimed in claim 3, characterized in that: the adhesive is prepared by mixing polymeric diphenylmethane diisocyanate, modified lignin and the labyrin according to the mass ratio of 2:2: 1.
5. The preparation method of the light building insulation board based on fly ash as claimed in claim 1, characterized in that: the modified lignin is prepared by the following method: carrying out an amination reaction on lignin, 25-30% of hydrogen peroxide and 20-25% of ammonia water by mass percent, wherein the lignin: hydrogen peroxide: and (2) ammonia water with the mass ratio of 1:2:2, filtering after the reaction is finished, drying the obtained supernatant, and grinding into powder to obtain the modified lignin.
6. The preparation method of the light building insulation board based on fly ash as claimed in claim 1, characterized in that: the foaming agent is any one of calcium carbonate, magnesium carbonate and sodium bicarbonate.
7. The preparation method of the light building insulation board based on fly ash as claimed in claim 1, characterized in that: the water reducing agent is any one of methacrylic acid, propenyl polyoxyethylene ether, methyl allyl polyoxyethylene ether and hydroxypropyl methyl cellulose.
8. The preparation method of the light building insulation board based on fly ash according to claim 1, characterized in that: the maintenance step is as follows: and curing the heat-insulating plate for 5-7 days under the conditions that the temperature is 20-25 ℃ and the relative humidity is 95-98% RH.
9. A light building insulation board based on fly ash is characterized in that: the lightweight building insulation board is obtained by the preparation method of the lightweight building insulation board based on the fly ash according to any one of claims 1 to 8.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102733230A (en) * | 2012-07-05 | 2012-10-17 | 东北林业大学 | Process for producing high-purity ammonium lignin by taking papermaking black liquid as material |
| CN102979205A (en) * | 2012-11-12 | 2013-03-20 | 青岛科瑞新型环保材料有限公司 | Foaming cement composite vacuum heat insulation plate and preparation method thereof |
| CN103626437A (en) * | 2013-11-27 | 2014-03-12 | 山东华邦建设集团有限公司 | Insulating board and preparation method thereof |
| CN105178459A (en) * | 2015-08-07 | 2015-12-23 | 安徽省中坤元新型建材有限公司 | Exterior wall insulation board |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102733230A (en) * | 2012-07-05 | 2012-10-17 | 东北林业大学 | Process for producing high-purity ammonium lignin by taking papermaking black liquid as material |
| CN102979205A (en) * | 2012-11-12 | 2013-03-20 | 青岛科瑞新型环保材料有限公司 | Foaming cement composite vacuum heat insulation plate and preparation method thereof |
| CN103626437A (en) * | 2013-11-27 | 2014-03-12 | 山东华邦建设集团有限公司 | Insulating board and preparation method thereof |
| CN105178459A (en) * | 2015-08-07 | 2015-12-23 | 安徽省中坤元新型建材有限公司 | Exterior wall insulation board |
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