CN115093193A - Lime stabilized macadam material of incineration fly ash of household garbage and preparation method thereof - Google Patents

Lime stabilized macadam material of incineration fly ash of household garbage and preparation method thereof Download PDF

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Publication number
CN115093193A
CN115093193A CN202210699908.0A CN202210699908A CN115093193A CN 115093193 A CN115093193 A CN 115093193A CN 202210699908 A CN202210699908 A CN 202210699908A CN 115093193 A CN115093193 A CN 115093193A
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fly ash
lime
parts
household garbage
percent
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CN202210699908.0A
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CN115093193B (en
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熊出华
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Chongqing Jiaotong University
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Chongqing Jiaotong University
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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
    • C04B28/24—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing alkyl, ammonium or metal silicates; containing silica sols
    • C04B28/26—Silicates of the alkali metals
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/10—Lime cements or magnesium oxide cements
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00017—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
    • 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
    • C04B2111/00732—Uses not provided for elsewhere in C04B2111/00 for soil stabilisation
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • 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

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

The invention discloses a lime stabilized macadam material of fly ash burned by household garbage, which comprises, by mass, 10-30 parts of a composite binder, 60-80 parts of macadam, an additive accounting for 4-6% of the mass of lime, and water accounting for 4-16% of the mass of a dry material, wherein the composite binder comprises, by mass, 40-60 parts of fly ash burned by household garbage, 5-18 parts of lime, 0-15 parts of fly ash and 10-40 parts of slag micro powder; the household garbage incineration fly ash is used for preparing lime stabilized macadam base material, the material strength is increased quickly, the construction period is shortened, the base strength is high, the road quality is improved, a large amount of solid waste, particularly the household garbage incineration fly ash, is consumed, the solid waste is recycled, the mining of mines is reduced, and the natural environment is protected; the cost of raw materials is low, and the construction cost is reduced; the construction process is simple and convenient.

Description

Lime stabilized macadam material of fly ash generated by burning household garbage and preparation method thereof
Technical Field
The invention relates to the field of road materials, in particular to a lime stabilized macadam material of incineration fly ash of household garbage and a preparation method thereof.
Background
The garbage incineration is one of the main methods for realizing the harmlessness, reduction and recycling of the household garbage. However, the incineration fly ash contains components such as dioxin, soluble heavy metals and the like, and is listed as dangerous waste in China, and the resource utilization of the incineration fly ash is urgent. The rapid development of the traffic construction of China, particularly the highway traffic, needs to consume a large amount of engineering materials, wherein the use of inorganic mineral aggregates such as cement, aggregate and the like causes the over-exploitation of mines and the continuous destruction of the natural environment. Therefore, a series of changes such as policy adjustment, resource shortage, material rising and the like are brought, and the highway construction and development progress of China is further restricted. Cement stabilized macadam and lime stabilized macadam are two main forms of domestic road base. The cement stabilized macadam not only consumes less solid waste, but also has the cost rising along with the rising of the price of the cement. In contrast, the lime stabilized macadam can digest solid wastes and is lower in price. The fly ash from incineration of household garbage contains active ingredients such as CaO, SiO2, Al2O3, Fe2O3 and the like, and can be excited under certain alkaline conditions to obtain strength. If the fly ash is used for road construction, a large amount of fly ash from the incineration of household garbage can be consumed, waste can be changed into valuable, and the recycling efficiency of harmless treatment of the household garbage can be effectively promoted. Although domestic garbage incineration fly ash is applied to road engineering at present, the fly ash is only limited to a cement stabilized macadam base layer and is not applied to a secondary ash stabilized base layer.
Disclosure of Invention
In view of the above, the invention aims to provide a lime stabilized macadam material made of fly ash from incineration of household garbage and a preparation method thereof.
The raw materials of the fly ash lime stabilized macadam material from the incineration of the household garbage comprise, by mass, 10-30 parts of a composite binder, 60-80 parts of macadam, an additive accounting for 4-6% of the mass of the lime, and water accounting for 4-16% of the mass of a dry material, wherein the composite binder comprises, by mass, 40-60 parts of fly ash from the incineration of the household garbage, 5-18 parts of lime, 0-15 parts of fly ash and 10-40 parts of slag micro powder;
further, the additive is one or a mixture of more than two of sodium silicate, alum, potassium sulfate and sodium carbonate;
further, the water content of the household garbage incineration fly ash is not more than 10 percent, the content of dioxin in solid components is not more than 10ng TEQ/kg, CaO and SiO 2 、Al 2 O 3 、Fe 2 O 3 The total content of (B) is 45-70%, Cl - The content is not more than 1 percent, the total content of heavy metals is not more than 1 percent, the total content of Zn, Cr, Cd, Cu and Mn in the heavy metals is not more than 0.88 percent, and the strength activity index of the municipal solid waste incineration fly ash is 55.2 percent;
furthermore, the sum of CaO and MgO contents of the lime is not less than 90%, wherein the MgO content is not more than 5%, and SO 3 Not exceeding2% of the solution;
further, the loss on ignition of the fly ash is not more than 8 percent, and SO 3 The content is not more than 3.5 percent, and the strength activity index is not less than 70 percent;
further, the specific surface area of the slag micro powder is more than or equal to 800m 2 Kg, 28 days active index not less than 105%, SO 3 Not more than 4 percent, and the ignition loss is not more than 3 percent;
furthermore, the crushed stone is rolled crushed stone, the particle size is not more than 50mm, the crushing value is not more than 22%, the content of needle-shaped particles is not more than 18%, the content of dust below 0.075mm is not more than 1.2%, and the content of soft stone is not more than 5%;
further, the water is underground water or domestic water, the pH value is more than or equal to 5.0 and less than or equal to 9.0, insoluble substances are less than or equal to 2000mg/L, and SO4 2- ≤800mg/L。
The invention also discloses a preparation method of the lime stabilized macadam material of the fly ash generated by burning the household garbage, which comprises the following steps:
mixing and stirring the composite binder and the additive uniformly, then adding the broken stone and stirring uniformly, adding water and stirring uniformly, and finally rolling and molding, preserving moisture and maintaining.
The invention has the beneficial effects that: according to the lime stabilized macadam material containing the household garbage incineration fly ash and the preparation method of the lime stabilized macadam material, the household garbage incineration fly ash is used for preparing the lime stabilized macadam base material, the material strength is increased quickly, the construction period is shortened, the base strength is high, the road quality is improved, a large amount of solid waste, particularly the household garbage incineration fly ash, is consumed, the solid waste recycling is realized, the mining of mines is reduced, and the natural environment is protected; the cost of raw materials is low, and the construction cost is reduced; the construction process is simple and convenient.
Detailed Description
The following examples are provided to further illustrate the present invention for better understanding, but the present invention is not limited to the following examples.
In the examples, the experimental methods used were all conventional methods unless otherwise specified, and the materials, reagents and the like used were commercially available unless otherwise specified.
Example one
The raw materials of the lime stabilized macadam material for the fly ash generated by burning the household garbage comprise, by mass, 10 parts of a composite binder, 60 parts of macadam, an additive accounting for 4% of the mass of the lime, and water accounting for 4% of the mass of a dry material, wherein the composite binder comprises, by mass, 40 parts of fly ash generated by burning the household garbage, 5 parts of lime and 10 parts of slag micro powder. In this example and the following examples, dry materials refer to the total amount of solid materials such as composite binder, crushed stone and admixture.
In this embodiment, the additive is sodium silicate.
The preparation method of the lime stabilized macadam material of the municipal solid waste incineration fly ash comprises the following steps: mixing and stirring the composite binder and the additive uniformly, then adding the broken stone and stirring uniformly, adding water and stirring uniformly, and finally rolling and molding, preserving moisture and maintaining.
The 7d unconfined compressive strength of the steel is 4.2MPa by adopting a conventional test method in the prior art.
Example two
The raw materials of the lime stabilized macadam material for the fly ash generated by burning the household garbage comprise, by mass, 30 parts of a composite binder, 80 parts of macadam, an additive accounting for 6% of the lime, and water accounting for 16% of the dry material, wherein the composite binder comprises, by mass, 60 parts of fly ash generated by burning the household garbage, 18 parts of lime, 15 parts of fly ash and 40 parts of slag micro-powder;
in this embodiment, the additive is alum.
The preparation method of the lime stabilized macadam material of the municipal solid waste incineration fly ash comprises the following steps: mixing and stirring the composite binder and the additive uniformly, then adding the crushed stone and stirring uniformly, adding water and stirring uniformly, and finally rolling and molding, and preserving moisture and maintaining.
The 7d unconfined compressive strength of the steel is 5.1MPa by adopting a conventional test method in the prior art.
EXAMPLE III
The raw materials of the fly ash incineration of household garbage lime stabilized macadam material of the embodiment comprise, by mass, 10 parts of a composite binder, 80 parts of macadam, an additive accounting for 4% of the lime, and water accounting for 16% of the dry material, wherein the composite binder comprises, by mass, 40 parts of fly ash incineration of household garbage, 18 parts of lime and 40 parts of slag micro powder;
in this embodiment, the additive is potassium sulfate.
The preparation method of the lime stabilized macadam material of the municipal solid waste incineration fly ash comprises the following steps: mixing and stirring the composite binder and the additive uniformly, then adding the broken stone and stirring uniformly, adding water and stirring uniformly, and finally rolling and molding, preserving moisture and maintaining.
The 7d unconfined compressive strength of the steel is 5.7MPa by adopting a conventional test method in the prior art.
Example four
The raw materials of the lime stabilized macadam material for the fly ash generated by burning the household garbage comprise, by mass, 30 parts of a composite binder, 60 parts of macadam, an additive accounting for 6% of the lime, and water accounting for 4% of the dry material, wherein the composite binder comprises, by mass, 60 parts of fly ash generated by burning the household garbage, 5 parts of lime, 15 parts of fly ash and 10 parts of slag micro powder;
in this embodiment, the additive is sodium carbonate. The preparation method of the lime stabilized macadam material of the municipal solid waste incineration fly ash comprises the following steps: mixing and stirring the composite binder and the additive uniformly, then adding the crushed stone and stirring uniformly, adding water and stirring uniformly, and finally rolling and molding, and preserving moisture and maintaining.
The 7d unconfined compressive strength of the steel is 5.9MPa by adopting a conventional test method in the prior art.
EXAMPLE five
The raw materials of the fly ash incineration of household garbage lime stabilized macadam material of the embodiment comprise, by mass, 20 parts of a composite binder, 70 parts of macadam, an additive accounting for 5% of the lime, and water accounting for 14% of the dry material, wherein the composite binder comprises, by mass, 50 parts of fly ash from incineration of household garbage, 7 parts of lime, 10 parts of fly ash and 30 parts of slag micro powder;
in this embodiment, the additive is a mixture of sodium silicate and alum.
The preparation method of the lime stabilized macadam material of the municipal solid waste incineration fly ash comprises the following steps: mixing and stirring the composite binder and the additive uniformly, then adding the broken stone and stirring uniformly, adding water and stirring uniformly, and finally rolling and molding, preserving moisture and maintaining.
The 7d unconfined compressive strength of the steel is 4.9MPa by adopting a conventional test method in the prior art.
EXAMPLE six
The raw materials of the lime stabilized macadam material for the fly ash generated by burning the household garbage comprise, by mass, 15 parts of a composite binder, 65 parts of macadam, an additive accounting for 6% of the lime, and water accounting for 8% of the dry material, wherein the composite binder comprises, by mass, 45 parts of fly ash generated by burning the household garbage, 15 parts of lime, 5 parts of fly ash and 18 parts of slag micro powder;
in this embodiment, the additive is a mixture of sodium silicate, alum, potassium sulfate, and sodium carbonate. The preparation method of the lime stabilized macadam material of the municipal solid waste incineration fly ash comprises the following steps: mixing and stirring the composite binder and the additive uniformly, then adding the broken stone and stirring uniformly, adding water and stirring uniformly, and finally rolling and molding, preserving moisture and maintaining.
The 7d unconfined compressive strength of the steel is 5.5MPa by adopting a conventional test method in the prior art.
In the above embodiment, the fly ash from incineration of household garbage has a water content of not more than 10%, a dioxin content of not more than 10ng TEQ/kg in solid components, CaO and SiO 2 、Al 2 O 3 、Fe 2 O 3 The total content of (B) is 45-70%, Cl - The content is not more than 1 percent, the total content of heavy metals is not more than 1 percent, the total content of Zn, Cr, Cd, Cu and Mn in the heavy metals is not more than 0.88 percent, and the strength activity index of the municipal solid waste incineration fly ash is 55.2 percent;
the sum of CaO and MgO contents of the lime is not less than 90%, wherein MgO content is not more than 5%, and SO 3 Not more than 2%;
the loss on ignition of the fly ash is not more than 8 percent, and SO 3 The content is not more than 3.5 percent, and the strength activity index is not less than 70 percent;
the specific surface area of the slag micro powder is more than or equal to 800m 2 Kg, 28 days active index not less than 105％，SO 3 Not more than 4 percent, and the ignition loss is not more than 3 percent;
the crushed stone is rolled crushed stone, the particle size is not more than 50mm, the crushing value is not more than 22%, the content of needle-shaped particles is not more than 18%, the content of dust below 0.075mm is not more than 1.2%, and the content of soft stone is not more than 5%;
the water is groundwater or domestic water, pH value is not less than 5.0 and not more than 9.0, insoluble substance is not more than 2000mg/L, SO4 2- Less than or equal to 800 mg/L. That is, the purpose of the invention can be achieved as long as the domestic waste incineration fly ash, lime, fly ash, slag micro-powder, broken stone and water meet the indexes.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.

Claims (9)

1. The household garbage incineration fly ash lime stabilized macadam material is characterized in that: the raw materials comprise, by mass, 10-30 parts of a composite binder, 60-80 parts of broken stone, an additive accounting for 4-6% of lime, and water accounting for 4-16% of dry material, wherein the composite binder comprises, by mass, 40-60 parts of domestic garbage incineration fly ash, 5-18 parts of lime, 0-15 parts of fly ash and 10-40 parts of slag micro powder.
2. The lime stabilized macadam material of municipal solid waste incineration fly ash according to claim 1, characterized in that: the additive is one or a mixture of more than two of sodium silicate, alum, potassium sulfate and sodium carbonate.
3. The lime stabilized macadam material of municipal solid waste incineration fly ash according to claim 2, characterized in that: the water content of the household garbage incineration fly ash is not more than 10 percent, the content of dioxin in solid components is not more than 10ng TEQ/kg, CaO and SiO 2 、Al 2 O 3 、Fe 2 O 3 The total content of (C) is 45-70%, Cl - The content of the fly ash is not more than 1 percent, the total content of heavy metals is not more than 1 percent, the total content of Zn, Cr, Cd, Cu and Mn in the heavy metals is not more than 0.88 percent, and the strength activity index of the fly ash generated by burning the household garbage is 55.2 percent.
4. The lime stabilized macadam material of municipal solid waste incineration fly ash according to claim 3, characterized in that: the sum of CaO and MgO contents of the lime is not less than 90%, wherein MgO content is not more than 5%, and SO 3 Not more than 2%.
5. The lime stabilized macadam material of fly ash from incineration of household garbage according to claim 4, characterized in that: the loss on ignition of the fly ash is not more than 8 percent, and SO 3 The content is not more than 3.5 percent, and the strength activity index is not less than 70 percent.
6. The lime stabilized macadam material of fly ash from incineration of household garbage according to claim 5, characterized in that: the specific surface area of the slag micro powder is more than or equal to 800m 2 Kg, 28 days active index not less than 105%, SO 3 Not more than 4 percent and the ignition loss not more than 3 percent.
7. The lime stabilized macadam material of fly ash from incineration of household garbage according to claim 6, characterized in that: the crushed stone is rolled crushed stone, the particle size is not more than 50mm, the crushing value is not more than 22%, the content of needle-shaped particles is not more than 18%, the content of dust below 0.075mm is not more than 1.2%, and the content of soft stone is not more than 5%.
8. The municipal solid waste incineration fly ash lime-stabilized macadam material according to claim 7, wherein: the water is groundwater or domestic water, pH value is not less than 5.0 and not more than 9.0, insoluble substance is not more than 2000mg/L, SO4 2- ≤800mg/L。
9. The method for preparing the lime stabilized macadam material from fly ash generated by burning household garbage according to claim 1, wherein the method comprises the following steps: the method comprises the following steps:
mixing and stirring the composite binder and the additive uniformly, then adding the crushed stone and stirring uniformly, adding water and stirring uniformly, and finally rolling and molding, and preserving moisture and maintaining.
CN202210699908.0A 2022-06-20 2022-06-20 Lime stabilized macadam material for fly ash generated by incineration of household garbage and preparation method thereof Active CN115093193B (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109456027A (en) * 2018-12-07 2019-03-12 西南科技大学 One kind mentioning titanium slag lime stabilization crushed stone material and preparation method thereof
CN111675514A (en) * 2020-05-28 2020-09-18 重庆三峰环境集团股份有限公司 Application of household garbage incineration fly ash in cement stabilized macadam mixture
CN111704406A (en) * 2020-05-28 2020-09-25 重庆三峰环境集团股份有限公司 Application of household garbage incineration fly ash composite admixture in cement stabilized macadam mixture

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109456027A (en) * 2018-12-07 2019-03-12 西南科技大学 One kind mentioning titanium slag lime stabilization crushed stone material and preparation method thereof
CN111675514A (en) * 2020-05-28 2020-09-18 重庆三峰环境集团股份有限公司 Application of household garbage incineration fly ash in cement stabilized macadam mixture
CN111704406A (en) * 2020-05-28 2020-09-25 重庆三峰环境集团股份有限公司 Application of household garbage incineration fly ash composite admixture in cement stabilized macadam mixture

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