CN117069422A - Fitment garbage micro powder-fly ash base polymer masonry mortar and preparation method thereof - Google Patents
Fitment garbage micro powder-fly ash base polymer masonry mortar and preparation method thereof Download PDFInfo
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- CN117069422A CN117069422A CN202310687474.7A CN202310687474A CN117069422A CN 117069422 A CN117069422 A CN 117069422A CN 202310687474 A CN202310687474 A CN 202310687474A CN 117069422 A CN117069422 A CN 117069422A
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- 239000004570 mortar (masonry) Substances 0.000 title claims abstract description 95
- 239000010881 fly ash Substances 0.000 title claims abstract description 89
- 239000010813 municipal solid waste Substances 0.000 title claims abstract description 83
- 229920005601 base polymer Polymers 0.000 title claims abstract description 28
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 66
- 238000005034 decoration Methods 0.000 claims abstract description 43
- 239000000843 powder Substances 0.000 claims abstract description 37
- 229920000876 geopolymer Polymers 0.000 claims abstract description 35
- 238000003756 stirring Methods 0.000 claims abstract description 35
- 239000004576 sand Substances 0.000 claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000011812 mixed powder Substances 0.000 claims abstract description 22
- 239000003513 alkali Substances 0.000 claims abstract description 20
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 19
- 235000019353 potassium silicate Nutrition 0.000 claims abstract description 16
- 239000012190 activator Substances 0.000 claims abstract description 7
- 239000011268 mixed slurry Substances 0.000 claims abstract description 6
- 238000002156 mixing Methods 0.000 claims abstract description 6
- 239000007787 solid Substances 0.000 claims abstract description 6
- 238000001723 curing Methods 0.000 claims description 41
- 238000000034 method Methods 0.000 claims description 25
- 239000002245 particle Substances 0.000 claims description 11
- 239000002699 waste material Substances 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 8
- 239000002002 slurry Substances 0.000 claims description 6
- 230000007613 environmental effect Effects 0.000 claims description 4
- 239000004115 Sodium Silicate Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 2
- 238000007605 air drying Methods 0.000 claims 1
- 239000000203 mixture Substances 0.000 abstract description 9
- 239000002994 raw material Substances 0.000 abstract description 9
- 239000004566 building material Substances 0.000 abstract description 3
- 239000002910 solid waste Substances 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 description 44
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 20
- 238000011049 filling Methods 0.000 description 18
- 229920000642 polymer Polymers 0.000 description 16
- 238000011056 performance test Methods 0.000 description 12
- 239000000463 material Substances 0.000 description 11
- 239000003795 chemical substances by application Substances 0.000 description 9
- 238000002474 experimental method Methods 0.000 description 7
- 239000011083 cement mortar Substances 0.000 description 6
- 239000002585 base Substances 0.000 description 5
- 229910052500 inorganic mineral Inorganic materials 0.000 description 5
- 239000011707 mineral Substances 0.000 description 5
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 4
- 239000000292 calcium oxide Substances 0.000 description 4
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 238000006467 substitution reaction Methods 0.000 description 4
- 206010016807 Fluid retention Diseases 0.000 description 3
- 239000011398 Portland cement Substances 0.000 description 3
- 229910004298 SiO 2 Inorganic materials 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Inorganic materials [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 239000002956 ash Substances 0.000 description 2
- 239000000378 calcium silicate Substances 0.000 description 2
- 229910052918 calcium silicate Inorganic materials 0.000 description 2
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910018516 Al—O Inorganic materials 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 229910000503 Na-aluminosilicate Inorganic materials 0.000 description 1
- 229910018557 Si O Inorganic materials 0.000 description 1
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 239000000404 calcium aluminium silicate Substances 0.000 description 1
- 235000012215 calcium aluminium silicate Nutrition 0.000 description 1
- WNCYAPRTYDMSFP-UHFFFAOYSA-N calcium aluminosilicate Chemical compound [Al+3].[Al+3].[Ca+2].[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O WNCYAPRTYDMSFP-UHFFFAOYSA-N 0.000 description 1
- 229940078583 calcium aluminosilicate Drugs 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000003837 high-temperature calcination Methods 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 230000003334 potential effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000009418 renovation Methods 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000000429 sodium aluminium silicate Substances 0.000 description 1
- 235000012217 sodium aluminium silicate Nutrition 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000012798 spherical particle Substances 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/006—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 mineral polymers, e.g. geopolymers of the Davidovits type
-
- 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
- C04B7/00—Hydraulic cements
- C04B7/24—Cements from oil shales, residues or waste other than slag
- C04B7/243—Mixtures thereof with activators or composition-correcting additives, e.g. mixtures of fly ash and alkali activators
-
- 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
- C04B7/00—Hydraulic cements
- C04B7/24—Cements from oil shales, residues or waste other than slag
- C04B7/246—Cements from oil shales, residues or waste other than slag from waste building materials, e.g. waste asbestos-cement products, demolition waste
-
- 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
- C04B2111/00017—Aspects relating to the protection of the environment
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Organic Chemistry (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The application discloses decoration garbage micro powder-fly ash base polymer mortar and a preparation method thereof, and belongs to the technical field of building material utilization. The composition is prepared from the following components in parts by mass: 28-141 parts of decorative garbage micro powder; 141-281 parts of fly ash; 217-237 parts of water glass; 16-26 parts of sodium hydroxide solid; 5-15 parts of water; 605 to 635 portions of natural river sand. Adding decorative garbage micro powder into the fly ash according to the weight parts, and uniformly mixing in a dry state to obtain mixed powder; adding sodium hydroxide into water glass, and uniformly mixing to obtain an alkaline excitant; adding an alkali activator into the mixed powder, uniformly stirring, and adding water to obtain a geopolymer mixed slurry; and adding river sand into the geopolymer mixed slurry to obtain mortar. The application takes the solid waste as the raw material to prepare the masonry mortar with good functionality, saves resources, is environment-friendly, realizes the comprehensive utilization of the fly ash and the decoration garbage micro powder, and has very wide application prospect.
Description
Technical Field
The application relates to the technical field of environment-friendly building materials, in particular to decorative garbage micro powder-fly ash base polymer masonry mortar and a preparation method thereof.
Background
The source of decoration garbage is wide, including new house decoration, second house renovation and reconstruction, etc. The decoration garbage is used as a type of decoration garbage, and has the characteristics of common decoration garbage, and also presents the second major characteristics: the components are multiple and complex, and the garbage property has large fluctuation. In particular, the content of the micro powder is higher than that of the traditional garbage for unpick treatment, so that the difficulty of recycling and treatment is higher. The micro powder is produced in the process of crushing the decoration garbage, and if the decoration garbage is not processed, the decoration garbage is transported to a remote suburban area for stockpiling, so that a large amount of land resources can be occupied, and further, the environment pollution and the urban appearance can be damaged.
In the decoration garbage, the powder with the grain diameter less than or equal to 0.075mm is the micropowder, and meanwhile, the crystallinity of the decoration garbage micropowder is poor, the decoration garbage micropowder has potential activity, and the curing method is generally adopted for treatment, so that the preparation method is a more suitable choice. However, the curing method generally uses Ordinary Portland Cement (OPC), and utilizes OPC to cure decorative garbage micropowder to prepare mortar, and the OPC needs high-temperature calcination in production, has high cost, high energy consumption and large emission of CO into the air 2 、SO 2 、NO x And the like, is unfavorable for environmental protection, and is also unsuitable for large-scale development and utilization. Therefore, under the background of continuous exhaustion of the current natural resources, the method for effectively treating the decoration garbage micro powder is explored, and has wide social significance and long-term environmental protection significance.
Disclosure of Invention
Aiming at the problems of the piling of the decorative garbage micro powder and the high energy consumption of the ordinary Portland cement production, the application provides the decorative garbage micro powder-fly ash base polymer mortar and the preparation method thereof, and the geopolymer mortar prepared by using the fly ash has good working performance and mechanical property, and the mortar can improve the recycling value of various solid wastes and is green, low-carbon and environment-friendly.
In a first aspect, the application provides a preparation method of a decorative garbage micro powder-fly ash base polymer masonry mortar, which comprises the following components in parts by weight: 28-141 parts of decoration garbage micro powder, 141-281 parts of fly ash and 217-237 parts of sodium silicate; 16-26 parts of sodium hydroxide solid, 5-15 parts of water and 605-635 parts of river sand; the preparation method comprises the following steps:
s1: according to the weight parts, uniformly mixing decoration garbage micro powder and fly ash to obtain mixed powder:
s2: adding the sodium hydroxide solid and water into the water glass according to the weight parts, stirring and mixing uniformly, and standing and cooling at room temperature to obtain an alkali activator;
s3: adding the alkali activator into the mixed powder and uniformly stirring to obtain geopolymer mixed slurry, namely geopolymer clean slurry;
s4: and adding the river sand into the geopolymer mixed slurry according to the weight parts, and stirring uniformly again to obtain the decorative garbage micro powder-fly ash geopolymer mortar.
In an alternative embodiment, in step S1, the particle size d of the fine powder of decorative waste 1 The range is as follows: 0<d 1 ≤75μm。
In an alternative embodiment, in step S2, the modulus of the alkali activator is 1.0 to 1.5.
In an alternative embodiment, in step S3, the mass ratio of the water to the mixed powder is (0.036 to 0.075): 1.
in an alternative embodiment, in step S4, the natural river sand has a particle size d 2 The range is as follows: d is 0 < d 2 ≤4.75mm。
In an alternative embodiment, after step S4, the method further includes: s5: pouring the decorative garbage micro powder-fly ash geopolymer mortar into a mould, standing for 24-36 h at room temperature, demoulding, curing in a constant-temperature blast drying oven, and curing in a standard curing room to obtain the decorative garbage micro powder-fly ash geopolymer mortar masonry.
In an alternative embodiment, in step S5, the constant temperature conditions of the constant temperature blast drying oven are: the curing time is 1-3 days at 50-80 ℃.
In an alternative embodiment, in step S5, the environmental conditions of the standard curing room are: the temperature is 18-22 ℃, and the relative humidity is more than 90 percent; the curing time is 3-6 days.
In a second aspect, the application provides a decorative garbage micropowder-fly ash base polymer mortar, which is obtained by any one of the preparation methods without step S5.
In a third aspect, the application provides a decorative waste micropowder-fly ash based polymer mortar masonry obtained by any one of the preparation methods comprising step S5.
The basic principle of the application is as follows: the geopolymerization technique may utilize a pozzolanic compound and a silica-alumina source material as mineral materials to depolymerize and dissolve out under alkaline conditions and then polymerize to form a geopolymer. The main component of the decoration garbage differentiation accords with the property of the geopolymer mineral material so that the geopolymer mineral material can be regarded as a mineral admixture of raw materials; the cage-shaped structure formed by polymerizing the geopolymer material can also play a good role in solidification, so that the decorative garbage micro powder is fixed in the cage-shaped structure; the metal cations in the decorative garbage micro powder can also be bonded in the geopolymer through Si-O or Al-O to keep the balance of electricity price; the calcium oxide in the fly ash reacts with the silicon oxide and the aluminum oxide to form hydrated calcium silicate and hydrated calcium aluminosilicate. This also results in further compaction of the polymer mortar, leading to a further development of the compressive strength; meanwhile, the fly ash is composed of fine vitreous spherical particles, so that the lubricating effect can be achieved. The prepared mortar can keep better workability. Workability of the mortar is also called as "workability of the mortar", and workability of the mortar of the new mixed mortar means comprehensive properties of facilitating construction and ensuring quality, that is, the mortar remains free from bleeding and delamination during transportation; the mortar has good fluidity so as to facilitate pumping and masonry performance in construction.
The application has at least the following beneficial effects:
(1) The application fully utilizes the solid waste fly ash and the decoration garbage, the fly ash and the decoration garbage micro powder are used as cementing materials, and the geopolymer masonry mortar prepared by using river sand as fine aggregate has excellent performance, good workability and mechanical property.
(2) The fly ash is fine ash collected in flue gas after coal combustion, and the polymer prepared by using the fly ash has low curing cost for decoration garbage, saves resources, is suitable for large-scale utilization, and can well solve the problem of environmental pollution caused by the piling of the fly ash.
(3) The main component of the decorative garbage micro powder is CaO and SiO 2 And Al 2 O 3 The mineral admixture used as the silicon-aluminum material can not only save fly ash, but also solve the problem of huge pressure brought to the environment by piling up the decoration garbage micro powder.
(4) The masonry mortar is prepared by adding decorative garbage micro powder into the fly ash, and the compressive strength of the masonry mortar is reduced along with the increase of the substitution rate, but the corresponding compressive strength can still be maintained at a higher level under a higher substitution rate, so that structural properties such as masonry strength and the like can be ensured.
(5) The consistency and the water retention of the masonry mortar prepared by adding the decoration garbage micro powder into the fly ash are maintained at a higher level. The water is not separated from the mortar in the transportation and paving processes, and the mortar is paved into a uniform thin layer, so that the masonry construction and the bonding of masonry materials are facilitated.
Drawings
FIG. 1 is a technical scheme of a method for preparing a decorative garbage micro-powder-fly ash base polymer masonry mortar according to an exemplary embodiment of the present application;
FIG. 2 is a histogram of consistency values of a decorative waste micropowder-fly ash base polymer mortar in accordance with an exemplary embodiment of the present application;
FIG. 3 is a bar graph of water retention of a decorative waste micropowder-fly ash based polymer mortar in accordance with an exemplary embodiment of the present application;
FIG. 4 is a bar graph of cube compressive strength after curing a 7d test piece of a decorative waste micro powder-fly ash based polymer mortar in accordance with an exemplary embodiment of the present application;
fig. 5 is a Scanning Electron Microscope (SEM) image of a decorative waste micropowder-fly ash based polymer mortar masonry after curing for 7d according to an exemplary embodiment of the present application.
Detailed Description
In order to make the features and technical solutions of the present application clear, the following description will further explain with reference to examples and drawings. It should be understood that the detailed description and specific examples, while indicating the application, are intended for purposes of illustration only and are not intended to limit the scope of the application. The materials used were all conventional products commercially available.
The fly ash is fine ash collected from flue gas after coal combustion, and compared with Portland cement, the fly ash has the advantages of wide source, low price, low energy consumption, no pollution basically and no consumption of limestone resources, and is an environment-friendly building material.
The particle diameter d of the fine powder of the decorative garbage used in the following examples 1 Is (0)<d 1 Less than or equal to 75 mu m) and the main chemical components are shown in the table 1; the fly ash is obtained from the lake and pond thermoelectric limited company in Changzhou of Jiangsu province, and the main chemical components are shown in the table 2 as class C fly ash; the natural river sand is taken from sand works in Changzhou city and is common medium sand. Its apparent density is 2650kg/m 3 Particle diameter d 2 Is (0)<d 2 Less than or equal to 4.75 mm); the alkali-activated agent is prepared by adjusting the modulus of the sodium hydroxide water glass solution to 1.5. Wherein the commercial sodium hydroxide solution used has a modulus of 2.3 and the sodium hydroxide used is, but is not limited to, an analytically pure grade sodium hydroxide platelet solid; the water used is, but is not limited to, commercially available deionized water.
The raw materials used in the embodiments of the present application include, but are not limited to, the modes disclosed herein, as long as the inventive concept of the present application can be achieved.
TABLE 1 Fitment waste micropowder composition and content
| Molecular formula | SiO 2 | Al 2 O 3 | CaO | MnO | Fe 2 O 3 | MgO | K 2 O | Ti 2 O | P 2 O 5 | SO 3 | Cl |
| Content of | 24.7 | 7.67 | 29.13 | 0.098 | 3.31 | 1.58 | 1.03 | 0.53 | 0.69 | 6.45 | 0.11 |
TABLE 2 fly ash composition and content
| Molecular formula | SiO 2 | Al 2 O 3 | CaO | Fe 2 O | P 2 O 5 | K 2 O | Ti 2 O | SO 3 | MgO | Na 2 O | SrO |
| Content of | 40.56 | 32 | 10.45 | 8.12 | 1.67 | 1.51 | 1.48 | 1.43 | 1.29 | 0.57 | 0.21 |
Comparative example 1:
in the example, fly ash base polymer mortar without adding decoration garbage micro powder is used as a comparison experiment, and the raw material components and the content are as follows: 281 parts of fly ash, 227 parts of sodium silicate solution, 26 parts of sodium hydroxide, 15 parts of water and 635 parts of natural river sand.
The preparation method of the fly ash base polymer masonry mortar comprises the following steps:
(1) Preparing an alkali excitant: adding 26 parts of sodium hydroxide and 15 parts of water into a beaker containing 227 parts of water glass solution, and uniformly stirring by using a magnetic stirrer to obtain the alkali-activated agent with the modulus n=1.5.
(2) And (3) clear pulp configuration: adding fly ash into a stirring pot of a cement mortar stirrer in advance, stirring for 1min, then slowly adding an alkaline excitant, and stirring uniformly to prepare geopolymer paste, wherein the stirring time is 3min.
(3) And (3) mortar preparation: slowly adding natural river sand into the geopolymer paste, uniformly stirring, and stirring for 5 minutes at times to obtain the fly ash base polymer masonry mortar. The consistency and the water-retaining property of the JGJ/T70-2009 building mortar are tested by referring to the basic performance test method standard, and the test results are shown in figures 2 and 3.
(4) And (5) die filling and forming: and (3) filling the prepared fly ash base polymer masonry mortar into a triple test mold with the length of 7.07cm multiplied by 7.07cm, and placing the test piece on a vibrating table to remove bubbles and compact for 10s after the mold filling is completed. The test piece was then smoothed with a spatula and placed in a sealed bag for 1d to shape.
(5) Demolding and curing: demolding and curing the molded test block, and firstly placing the test block in a constant-temperature blast drying oven to be cured for 1d at 60 ℃; and then placing the mixture in a standard curing room for curing until the experiment age. The mechanical properties are tested according to the JGJ/T70-2009 building mortar basic performance test method standard, and the test results are shown in fig. 4.
Example 1:
the decorative garbage-fly ash base polymer masonry mortar comprises the following raw materials in parts by weight: 253 parts of fly ash, 28 parts of decoration garbage micro powder, 227 parts of water glass solution, 26 parts of sodium hydroxide, 15 parts of water and 635 parts of natural river sand.
1.1, preparing decorative garbage micro powder-fly ash base polymer masonry mortar:
s1, preparing mixed powder: 253 parts of fly ash and 28 parts of decorative garbage micro powder are added into a stirring pot of a cement mortar stirrer in advance and stirred uniformly to obtain mixed powder;
s2, preparing an alkali excitant: adding the 26 parts of sodium hydroxide and 15 parts of water into 227 parts of water glass, and uniformly stirring by using a magnetic stirrer to obtain an alkali-activated agent with the modulus n=1.5;
s3, preparing a clean slurry: adding the alkaline excitant into the mixed powder, and uniformly stirring to prepare geopolymer paste;
s4, preparing mortar: slowly adding 635 parts of natural river sand into the ground polymer paste, uniformly stirring for 5min to obtain the decorative garbage micro powder-fly ash base ground polymer masonry mortar. The consistency and the water-retaining property of the JGJ/T70-2009 building mortar are tested by referring to the basic performance test method standard, and the test results are shown in figures 2 and 3.
1.2, preparing a decoration garbage micro powder-fly ash geopolymer mortar masonry:
and (5) die filling and forming: and (3) filling the prepared decorative garbage micro powder-fly ash base polymer masonry mortar into a triple test mold with the length of 7.07cm multiplied by 7.07cm, and placing a test piece on a vibrating table to remove bubbles and vibrate for compacting for 10s after the mold filling is completed. The test piece was then smoothed with a spatula and placed in a sealed bag for 1d to shape.
Demolding and curing: demolding and curing the molded test block, and firstly placing the test block in a constant-temperature blast drying oven to be cured for 1d at 60 ℃; and then placing the mixture in a standard curing room for curing until the experiment age. The mechanical properties are tested according to the JGJ/T70-2009 building mortar basic performance test method standard, and the test results are shown in fig. 4.
Example 2:
the decorative garbage-fly ash base polymer masonry mortar comprises the following raw materials in parts by weight: 200 parts of fly ash, 56 parts of decoration garbage micro powder, 237 parts of water glass solution, 20 parts of sodium hydroxide, 10 parts of water and 625 parts of natural river sand.
2.1 preparing decorative garbage micro powder-fly ash base polymer masonry mortar:
s1, preparing mixed powder: 200 parts of fly ash and 56 parts of decoration garbage micro powder are added into a stirring pot of a cement mortar stirrer in advance and stirred uniformly to obtain mixed powder;
s2, preparing an alkali excitant: adding the 20 parts of sodium hydroxide and 10 parts of water into 237 parts of water glass, and uniformly stirring by using a magnetic stirrer to obtain an alkali-activated agent with the modulus n=1.5;
s3, preparing a clean slurry: adding the alkaline excitant into the mixed powder, and uniformly stirring to prepare geopolymer paste;
s4, preparing mortar: and slowly adding 625 parts of natural river sand into the ground polymer paste, uniformly stirring for about 5min, and obtaining the decorative garbage micro powder-fly ash base ground polymer masonry mortar. The consistency and the water-retaining property of the JGJ/T70-2009 building mortar are tested by referring to the basic performance test method standard, and the test results are shown in figures 2 and 3.
2.2, preparing decorative garbage micro powder-fly ash geopolymer mortar masonry:
and (5) die filling and forming: and (3) filling the prepared decorative garbage micro powder-fly ash base polymer masonry mortar into a triple test mold with the length of 7.07cm multiplied by 7.07cm, and placing the test piece on a vibrating table to remove bubbles and vibrate for compacting for 10s after the mold filling is completed. The test piece was then smoothed with a spatula and placed in a sealed bag for 1d to shape.
Demolding and curing: demolding and curing the molded test block, and firstly placing the test block in a constant-temperature blast drying oven to be cured for 1d at 60 ℃; and then placing the mixture in a standard curing room for curing until the experiment age. The mechanical properties are tested according to the JGJ/T70-2009 building mortar basic performance test method standard, and the test results are shown in fig. 4.
Example 3:
the decorative garbage-fly ash base polymer masonry mortar comprises the following raw materials in parts by weight: 151 parts of fly ash, 49 parts of decoration garbage micropowder, 217 parts of water glass solution, 26 parts of sodium hydroxide, 5 parts of water and 605 parts of natural river sand.
3.1, preparing decorative garbage micro powder-fly ash base polymer masonry mortar:
s1, preparing mixed powder: 151 parts of fly ash and 49 parts of decorative garbage micro powder are added into a stirring pot of a cement mortar stirrer in advance and stirred uniformly to obtain mixed powder;
s2, preparing an alkali excitant: adding the 21 parts of sodium hydroxide and 15 parts of water into 227 parts of water glass, and uniformly stirring by using a magnetic stirrer to obtain an alkali-activated agent with the modulus n=1.5;
s3, preparing a clean slurry: adding the alkaline excitant into the mixed powder, and uniformly stirring to prepare geopolymer paste;
s4, preparing mortar: and slowly adding 625 parts of natural river sand into the ground polymer paste, uniformly stirring for about 5min, and obtaining the decorative garbage micro powder-fly ash base ground polymer masonry mortar. The consistency and the water-retaining property of the JGJ/T70-2009 building mortar are tested by referring to the basic performance test method standard, and the test results are shown in figures 2 and 3.
3.2, preparing a decoration garbage micro powder-fly ash geopolymer mortar masonry:
and (5) die filling and forming: and (3) filling the decoration garbage micro powder-fly ash base polymer into a triple test mold with the length of 7.07cm multiplied by 7.07cm, and placing the test piece on a vibrating table to remove bubbles and vibrating for compacting for 10s after the mold filling is completed. The test piece was then smoothed with a spatula and placed in a sealed bag for 1d to shape.
Demolding and curing: demolding and curing the molded test block, and firstly placing the test block in a constant-temperature blast drying oven to be cured for 1d at 60 ℃; and then placing the mixture in a standard curing room for curing until the experiment age. The mechanical properties are tested according to the JGJ/T70-2009 building mortar basic performance test method standard, and the test results are shown in fig. 4.
Example 4:
the decorative garbage-fly ash base polymer masonry mortar comprises the following raw materials in parts by weight: 169 parts of fly ash, 109 parts of decoration garbage micro powder, 220 parts of water glass solution, 16 parts of sodium hydroxide, 13 parts of water and 625 parts of natural river sand.
4.1, preparing decorative garbage micro powder-fly ash base polymer masonry mortar:
s1, preparing mixed powder: 169 parts of fly ash and 109 parts of decoration garbage micro powder are added into a stirring pot of a cement mortar stirrer in advance and stirred uniformly to obtain mixed powder;
s2, preparing an alkali excitant: adding 16 parts of sodium hydroxide and 13 parts of water into 220 parts of water glass solution, and uniformly stirring by using a magnetic stirrer to obtain an alkali-activated agent with the modulus n=1.5;
s3, preparing a clean slurry: adding the alkaline excitant into the mixed powder, and uniformly stirring to prepare geopolymer paste;
s4, preparing mortar: and slowly adding 625 parts of natural river sand into the ground polymer paste, uniformly stirring, and stirring for 5 minutes at times to obtain the decorative garbage micro powder-fly ash base ground polymer masonry mortar. The consistency and the water-retaining property of the JGJ/T70-2009 building mortar are tested by referring to the basic performance test method standard, and the test results are shown in figures 2 and 3.
4.2, preparing a decoration garbage micro powder-fly ash geopolymer mortar masonry:
and (5) die filling and forming: and (3) filling the prepared geopolymer masonry mortar into a triple test mold with the length of 7.07cm multiplied by 7.07cm, and placing the test piece on a vibrating table to remove bubbles and vibrating for compacting for 10s after the mold filling is completed. The test piece was then smoothed with a spatula and placed in a sealed bag for 1d to shape.
Demolding and curing: demolding and curing the molded test block, and firstly placing the test block in a constant-temperature oven to be cured for 1d at 60 ℃; and then placing the mixture in a standard curing room for curing until the experiment age. The mechanical properties are tested according to the JGJ/T70-2009 building mortar basic performance test method standard, and the test results are shown in fig. 4.
Example 5:
the decorative garbage-fly ash base polymer masonry mortar comprises the following raw materials in parts by weight: 141 parts of fly ash, 91 parts of decoration garbage micro powder, 232 parts of water glass solution, 21 parts of sodium hydroxide, 12 parts of water and 615 parts of natural river sand.
5.1, preparing decorative garbage micro powder-fly ash base polymer masonry mortar:
s1, preparing mixed powder: 141 parts of fly ash and 91 parts of decoration garbage micro powder are added into a stirring pot of a cement mortar stirrer in advance and stirred uniformly to obtain mixed powder;
s2, preparing an alkali excitant: adding 21 parts of sodium hydroxide and 12 parts of water into 232 parts of water glass solution, and uniformly stirring by using a magnetic stirrer to obtain an alkali-activated agent with the modulus n=1.5;
s3, preparing mortar: slowly adding 615 parts of natural river sand into the ground polymer paste, uniformly stirring, and stirring for 5 minutes at times to obtain the decorated garbage micro powder-fly ash base ground polymer masonry mortar. The consistency and the water-retaining property of the JGJ/T70-2009 building mortar are tested by referring to the basic performance test method standard, and the test results are shown in figures 2 and 3.
5.2, preparing a decoration garbage micro powder-fly ash geopolymer mortar masonry:
and (5) die filling and forming: and (3) filling the prepared geopolymer masonry mortar into a triple test mold with the length of 7.07cm multiplied by 7.07cm, and placing the test piece on a vibrating table to remove bubbles and vibrating for compacting for 10s after the mold filling is completed. The test piece was then smoothed with a spatula and placed in a sealed bag for 1d to shape.
Demolding and curing: demolding and curing the molded test block, and firstly placing the test block in a constant-temperature blast drying oven to be cured for 1d at 60 ℃; and then placing the mixture in a standard curing room for curing until the experiment age. The mechanical properties are tested according to the JGJ/T70-2009 building mortar basic performance test method standard, and the test results are shown in fig. 4.
According to the test result, the compression strength of the decoration garbage micro powder is continuously reduced along with the increase of the substitution rate of the decoration garbage micro powder for the fly ash. This is because amorphous SiO in the fine powder of the decorative garbage 2 And Al 2 O 3 The content is less than that of fly ash, and the product is producedThe amount of gel produced is small. But the mechanical properties of the 5 groups of embodiments can meet the basic requirements of the masonry mortar, have excellent mechanical property level, and can ensure the bonding performance of the masonry strength and other structures; with the increase of the substitution rate, the water retention property of the water-retaining agent does not decrease, and the water-retaining agent can still be maintained at an excellent level of 100%. The consistency values of the examples of group 5, although fluctuating within a certain level range, still have a better workability within the normal use range of the masonry mortar. The mortar can be ensured to be transported and paved, and water can not be separated from the mortar; the surface of the masonry is paved uniformly, which is favorable for masonry construction and bonding of masonry materials. The microscopic morphology of the masonry mortar masonry is shown in a scanning electron microscope picture 5, the mortar mainly comprises amorphous hydrated sodium aluminosilicate gel and hydrated calcium silicate gel materials which are stacked in a plate shape, and the gel is filled between or wrapped around partially corroded fly ash particles, unreacted fly ash particles and decoration garbage micro powder particles, so that a compact mortar structure with lower porosity is formed. Meanwhile, the particle grading of the decoration garbage micro powder and unreacted fly ash particles is further optimized, so that the mortar structure is more compact, and further, the better mechanical property is obtained.
Claims (10)
1. The preparation method of the decoration garbage micro powder-fly ash base polymer mortar is characterized by comprising the following components in parts by weight: 28-141 parts of decoration garbage micro powder, 141-281 parts of fly ash and 217-237 parts of sodium silicate; 16-26 parts of sodium hydroxide solid, 5-15 parts of water and 605-635 parts of river sand; the preparation method comprises the following steps:
s1: uniformly mixing the decoration garbage micro powder and the fly ash according to the weight parts to obtain mixed powder;
s2: adding the sodium hydroxide solid and water into the water glass according to the weight parts, stirring and mixing uniformly, and standing and cooling at room temperature to obtain an alkali activator;
s3: adding the alkali activator into the mixed powder and uniformly stirring to obtain geopolymer mixed slurry, namely geopolymer clean slurry;
s4: and adding the river sand into the geopolymer mixed slurry according to the weight parts, and stirring uniformly again to obtain the decorative garbage micro powder-fly ash geopolymer mortar.
2. The method according to claim 1, wherein in step S1, the particle size d of the fine powder of the decorative waste is as follows 1 The range is as follows: 0<d 1 ≤75μm。
3. The method according to claim 1, wherein in step S2, the modulus of the alkali activator is 1.0 to 1.5.
4. The method according to claim 1, wherein in step S3, the mass ratio of the water to the mixed powder is (0.036 to 0.075): 1.
5. the method according to claim 1, wherein in step S4, the natural river sand has a particle diameter d 2 The range is as follows: d is 0 < d 2 ≤4.75mm。
6. A method according to any one of claims 1 to 5, further comprising, after step S4: s5: pouring the decorative garbage micro powder-fly ash geopolymer mortar into a mould, standing for 24-36 h at room temperature, demoulding, curing in a constant-temperature blast drying oven, and curing in a standard curing room to obtain the decorative garbage micro powder-fly ash geopolymer mortar masonry.
7. The method according to claim 6, wherein in step S5, the constant temperature conditions of the constant temperature forced air drying oven are: the curing time is 1-3 days at 50-80 ℃.
8. The method according to claim 6, wherein in step S5, the environmental conditions of the standard curing room are: the temperature is 18-22 ℃, and the relative humidity is more than 90 percent; the curing time is 3-6 days.
9. A decorative garbage micropowder-fly ash base polymer mortar, which is characterized by being prepared by the preparation method of any one of claims 1-5.
10. A decorative waste micropowder-fly ash geopolymer mortar masonry obtained by the production method according to any one of claims 6 to 8.
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