CN112723766B - Heat-insulating light material for roadbed in all-solid-waste frozen soil area and preparation method thereof - Google Patents

Heat-insulating light material for roadbed in all-solid-waste frozen soil area and preparation method thereof Download PDF

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CN112723766B
CN112723766B CN202011636068.0A CN202011636068A CN112723766B CN 112723766 B CN112723766 B CN 112723766B CN 202011636068 A CN202011636068 A CN 202011636068A CN 112723766 B CN112723766 B CN 112723766B
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roadbed
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phosphogypsum
frozen soil
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CN112723766A (en
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王文龙
武双
姚星亮
杨世钊
姚永刚
毛岩鹏
王旭江
李敬伟
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Shandong 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
    • C04B7/00—Hydraulic cements
    • C04B7/32—Aluminous 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
    • 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
    • C04B28/14—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 calcium sulfate cements
    • C04B28/142—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 calcium sulfate cements containing synthetic or waste calcium sulfate cements
    • C04B28/143—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 calcium sulfate cements containing synthetic or waste calcium sulfate cements the synthetic calcium sulfate being phosphogypsum
    • 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
    • C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20—Resistance against chemical, physical or biological attack
    • 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
    • C04B2111/40—Porous or lightweight materials
    • 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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  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Road Paving Structures (AREA)
  • Soil Conditioners And Soil-Stabilizing Materials (AREA)

Abstract

The invention discloses a heat-insulating and heat-preserving light material for roadbeds in full-solid waste frozen soil areas and a preparation method thereof, wherein the heat-insulating and heat-preserving light material comprises the following raw materials, by mass, 35-50 parts of an iron aluminate cementing material, 5-25 parts of phosphogypsum, 5-25 parts of fly ash, 0.04-0.5 part of a polycarboxylic acid water reducing agent, 0.02-0.05 part of hydroxypropyl methyl cellulose ether, 27-29 parts of water and 1.5-2.5 parts of waste polystyrene particles; the ferroaluminate cementing material comprises, by mass, 17-22 parts of steel slag, 18-21 parts of aluminum slag, 38-42 parts of carbide slag and 17-42 parts of phosphogypsum. The invention realizes the large-scale utilization of industrial solid waste and obtains the light material with high compressive strength and strong heat insulation capability.

Description

Heat-insulation and heat-preservation light material for roadbed in all-solid-waste frozen soil area and preparation method thereof
Technical Field
The invention relates to a heat insulation light material for a roadbed in a full solid waste frozen soil area and a preparation method thereof.
Background
The information in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art that is already known to a person of ordinary skill in the art.
The global permafrost region occupies about 50% of land area, wherein the permafrost region occupies 25%, wherein the permafrost region in China has an area of 215 kilometers square and 22.3% of the total area of the national soil in China, and is only inferior to Russia and Canada and occupies the third place of the world, while the permafrost region at high altitude occupies the first place of the world. With the continuous promotion of engineering construction in China, the development of frozen soil areas is deepened continuously, especially in the aspect of road construction. However, the ice content of soil in frozen soil areas is high, the thermal stability is poor, and the geological environment is severe. This causes diseases such as thawing, frost heaving, ice damage, freeze-thaw, slurry turnover and the like on the roadbed of the road, and greatly affects the long-term use of the road, so that it is important to ensure the stability of the roadbed in frozen soil areas.
According to the knowledge of the inventor, in the construction of guaranteeing the roadbed in the frozen soil area, besides active measures such as a ventilated roadbed, a broken (block) stone roadbed, a broken (block, piece) stone slope protection, a heat rod and the like, passive engineering measures of thermal insulation materials are also adopted, wherein polystyrene particle foam concrete is used. According to the research of the inventor, the ordinary portland cement adopted by the material has the defects of poor freezing resistance, limited construction period, short service life and the like besides the problems of high cost, serious pollution and the like caused by the adoption of a large amount of natural mineral resources in the preparation process.
Disclosure of Invention
In order to solve the defects of the prior art, the invention aims to provide a heat-insulating light material for a roadbed in a full solid waste frozen soil area and a preparation method thereof.
In order to achieve the purpose, the technical scheme of the invention is as follows:
on the one hand, the ferroaluminate cementing material comprises, by mass, 17-22 parts of steel slag, 18-21 parts of aluminum slag, 38-42 parts of carbide slag and 17-42 parts of phosphogypsum.
On the other hand, the preparation method of the iron aluminate cementing material comprises the steps of respectively grinding the steel slag, the aluminum slag, the carbide slag and a part of phosphogypsum, mixing to obtain a gel mixture, calcining the gel mixture to obtain a cementing material clinker, mixing the cementing material clinker with the other part of phosphogypsum, and grinding to obtain the iron aluminate cementing material.
The invention utilizes industrial solid wastes to prepare the iron aluminate cementing material, the material has excellent early compressive strength and frost resistance, and can be used for guaranteeing the roadbed in frozen soil areas, thereby overcoming the defects of poor frost resistance, limited construction period, short service life and the like.
The third aspect is that the heat-insulating and heat-preserving light material for the roadbed in the all-solid-waste frozen soil area comprises, by mass, 35-50 parts of the iron aluminate cementing material, 5-25 parts of phosphogypsum, 5-25 parts of fly ash, 0.04-0.5 part of a polycarboxylic acid water reducing agent, 0.02-0.05 part of hydroxypropyl methyl cellulose ether, 27-29 parts of water and 1.5-2.5 parts of waste polystyrene particles.
According to a fourth aspect, the preparation method of the heat-insulating and heat-preserving light material for the roadbed in the all-solid waste frozen soil region comprises the steps of grinding and uniformly mixing an iron aluminate cementing material, phosphogypsum, fly ash, a polycarboxylic acid water reducing agent and hydroxypropyl methyl cellulose ether to obtain a roadbed mixture, adding water into the roadbed mixture to obtain roadbed slurry, adding waste polystyrene particles into the roadbed slurry, stirring, and introducing into a mold to harden to obtain the heat-insulating and heat-preserving light material.
The invention utilizes the iron aluminate gelled material prepared from industrial solid wastes as the matrix material of the roadbed material, so that the roadbed material has excellent early compressive strength and frost resistance. In order to enable the roadbed material to have frozen soil areas, which requires that the formed roadbed material has the properties of heat insulation, heat preservation and light weight, in general, polystyrene foam is required to be added into a base material as a heat preservation aggregate, however, the addition of commercial polystyrene particles is found through actual addition, the compression strength of the roadbed material is reduced, and the analysis shows that the surfaces of the commercial polystyrene particles are smooth, the binding capacity of the commercial polystyrene particles with the iron aluminate cementing material prepared by the invention is poor, and the compression strength of the formed roadbed material is poor. Therefore, the waste polystyrene particles are used for replacing commercial polystyrene particles, and the waste polystyrene particles are all processed polystyrene for re-granulation, so that the formed particles are irregular in shape, more edges and holes exist on the surface, the contact with the iron aluminate cementing material is increased, the iron aluminate cementing material prepared by the method is better combined with the thermal insulation aggregate, the compressive strength is increased, and the defects of poor freezing resistance, limited construction period, short service life and the like of the traditional roadbed material are overcome.
The invention has the beneficial effects that:
(1) the iron aluminate cementing material prepared by the invention completely uses industrial solid wastes such as steel slag, aluminum slag, carbide slag, phosphogypsum, fly ash and the like as cementing materials and mineral admixtures, and no new wastes are generated in the preparation process. The light material with high compressive strength and strong heat insulation and preservation capability is obtained while the industrial solid waste is utilized on a large scale. Because the industrial solid waste stock is huge and the cost is low, the invention not only reduces the preparation cost, but also can relieve the problems of natural mineral resource exhaustion and industrial solid waste accumulation.
(2) The traditional polystyrene foam concrete has the characteristics of low compressive strength and no freezing resistance, and the polystyrene foam concrete adopts an iron aluminate cementing material produced by industrial solid wastes, so that the early compressive strength and the freezing resistance of the polystyrene foam concrete are far superior to those of the traditional cement, the construction period is shortened, and the service life is prolonged.
(3) The waste polystyrene particles adopted by the invention as the heat-insulating aggregate can save more than 25% of cost, and can also improve the compressive strength of the heat-insulating material, thereby improving the frost resistance of the heat-insulating material. Realizes the compound utilization of organic and inorganic solid wastes.
(4) The polystyrene foam concrete has the advantages of simple preparation process, simple and convenient working procedure, strong selectivity, easy operation and strong practicability, and can be manufactured on site or prefabricated in factories and installed on site.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are included to illustrate an exemplary embodiment of the invention and not to limit the invention.
FIG. 1 is a flow chart of a production process of a heat-insulating light material for roadbeds in frozen soil regions according to example 1 of the present invention;
FIG. 2 is an XRD spectrum of the steel slag-based Fe-Al based cementing material prepared in example 1 of the present invention.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
In view of the defects of poor freezing resistance, limited construction period, short service life and the like of the roadbed material in the frozen soil area prepared by the existing polystyrene particle foam concrete, the invention provides a heat-insulating light-weight material for the roadbed in the all-solid-waste frozen soil area and a preparation method thereof.
The invention provides an iron aluminate cementing material, which comprises, by mass, 17-22 parts of steel slag, 18-21 parts of aluminum slag, 38-42 parts of carbide slag and 17-42 parts of phosphogypsum.
In another embodiment of the present invention, a preparation method of the iron aluminate cementing material is provided, wherein the steel slag, the aluminum slag, the carbide slag and a part of the phosphogypsum are respectively ground and mixed to obtain a gel mixture, the gel mixture is calcined to obtain a cementing material clinker, and the cementing material clinker is mixed with another part of the phosphogypsum and ground to obtain the iron aluminate cementing material.
The invention utilizes industrial solid wastes to prepare the iron aluminate cementing material, the material has excellent early compressive strength and frost resistance, and can be used for guaranteeing the roadbed in frozen soil areas, thereby overcoming the defects of poor frost resistance, limited construction period, short service life and the like.
In some examples of this embodiment, the milling process of the raw material of the gel mix is dry milling.
In some examples of the embodiment, the fineness of the ground raw materials of the gel mixture is controlled to be 6-10% of the residue of a square-hole sieve with 0.08 mm.
In some embodiments of the embodiment, the mass ratio of the steel slag, the aluminum slag, the carbide slag and the phosphogypsum in the gel mixture is 17-22: 18-21: 38-42: 17-22.
In some examples of this embodiment, the temperature of the calcination is 1200 to 1300 ℃. The calcination temperature of the ordinary portland cement clinker is about 1400 ℃, and the calcination temperature is far higher than that of the invention, so the adoption of the aluminoferrite cementing material of the invention is more energy-saving and environment-friendly.
In some examples of this embodiment, the calcination is carried out for a time period of 30 to 60 min.
In some embodiments of this embodiment, another portion of the phosphogypsum is added in an amount of 0-20% by mass of the cement clinker.
In some examples of the embodiment, the cement clinker is mixed with the phosphogypsum, and the fineness of grinding is controlled to be 6-10% of the residue of a 0.08mm square-hole sieve.
The third embodiment of the invention provides a heat-insulating and heat-preserving light material for roadbeds in all-solid-waste frozen soil areas, which comprises the following raw materials, by mass, 35-50 parts of the iron aluminate cementing material, 5-25 parts of phosphogypsum, 5-25 parts of fly ash, 0.04-0.5 part of a polycarboxylic acid water reducing agent, 0.02-0.05 part of hydroxypropyl methyl cellulose ether, 27-29 parts of water and 1.5-2.5 parts of waste polystyrene particles.
In some examples of this embodiment, the waste polystyrene particles have a particle size of 2 to 4 mm.
According to a fourth embodiment of the invention, the preparation method of the heat insulation and preservation lightweight material for the roadbed in the all-solid-waste frozen soil region is provided, and the heat insulation and preservation lightweight material for the roadbed in the all-solid-waste frozen soil region is obtained by grinding and uniformly mixing the iron aluminate cementing material, the phosphogypsum, the fly ash, the polycarboxylic acid water reducing agent and the hydroxypropyl methyl cellulose ether to obtain a roadbed mixture, adding water into the roadbed mixture to obtain a roadbed slurry, adding the waste polystyrene particles into the roadbed slurry, stirring, and introducing into a mold to harden.
The invention discovers that the compressive strength of the thermal insulation aggregate prepared by using commercial polystyrene particles as the thermal insulation aggregate and the iron aluminate cementing material provided by the invention is poorer. Therefore, the waste polystyrene particles are adopted to replace commercial polystyrene particles, and the surfaces of the waste polystyrene particles have more edges and holes, so that the combination of the iron aluminate cementing material and the polystyrene particles is facilitated, the compressive strength of the roadbed material is increased, and the defects of poor freezing resistance, limited construction period, short service life and the like of the traditional roadbed material are further overcome.
In some examples of this embodiment, the subgrade slurry is prepared at a water-to-cement ratio of 0.40 to 0.50.
In some examples of this embodiment, the curing time is 20 to 30 hours.
In some examples of this embodiment, the conditions for hardening are: the temperature is 18-22 ℃, and the humidity is 98.6-99.4%.
In order to make the technical solutions of the present invention more clearly understood by those skilled in the art, the technical solutions of the present invention will be described in detail below with reference to specific embodiments.
Example 1
As shown in fig. 1, the method comprises a method for preparing an iron aluminate cementing material from all industrial solid wastes and a method for preparing a heat-insulating light material for roadbeds in all solid waste frozen soil areas.
1. A method for preparing an iron aluminate cementing material from whole industrial solid wastes comprises the following steps:
(1) respectively weighing the steel slag, the aluminum slag, the carbide slag and the phosphogypsum according to the mass ratio of 20.76 percent to 19.38 percent to 41.52 percent to 18.34 percent, respectively adding different amounts of raw materials into a dry mill for grinding, wherein the fineness of the raw materials is controlled to be about 8 percent of the residue of a square-hole sieve with 0.08mm, and the chemical component analysis of the steel slag, the aluminum slag, the carbide slag and the phosphogypsum is shown in table 1;
(2) and (2) adding the raw materials ground in the step (1) into a dry grinding method, uniformly mixing, then putting into a rotary kiln for calcination, wherein the calcination temperature is 1250 ℃, the heat preservation time is 30min, and after calcination is finished, rapidly cooling at room temperature to obtain granular clinker.
(3) The obtained granular clinker and 10% of phosphogypsum are added into a dry mill together and ground until the fineness is about 10% of the residue of a square-hole sieve with the fineness of 0.08 mm.
The chemical composition of the aluminoferrite cement prepared in this example was measured and compared with conventional cement clinker, and the results are shown in table 2.
The mineral phase composition of the aluminoferrite cement prepared in this example was measured by XRD, and the results are shown in fig. 2, and it can be seen from fig. 2 that the aluminoferrite cement minerals prepared in this example are mainly tetracalcium aluminoferrite, calcium sulphoaluminate, dicalcium silicate and calcium sulfate, which indicates that the minerals are well formed.
According to GB/T20472-.
Table 1 chemical elemental composition (wt.%) of the different industrial solid wastes in example 1
Figure BDA0002876313340000071
Table 2 composition table (wt.%) of the aluminoferrite cement prepared in example 1 versus conventional cement clinker
Figure BDA0002876313340000072
Figure BDA0002876313340000081
Table 3 results of testing the compressive strength of the aluminoferrite cement prepared in example 1 and conventional cement
Figure BDA0002876313340000082
2. A preparation method of a heat insulation light material for roadbeds in all-solid waste frozen soil areas comprises the following steps:
(1) 315g of the iron-aluminum series cementing material, 100g of the phosphogypsum and 35g of the fly ash in the step 1 are weighed according to the mass, 0.4% of polycarboxylic acid water reducing agent and 0.2% of hydroxypropyl methyl cellulose ether are added and uniformly mixed to obtain a mixture, and the mixture is dry-ground until the screen residue of a square-hole screen with the fineness of 0.08mm is about 10%.
(2) And (2) putting the mixture obtained in the step (1) into a stirring pot, and adding water according to the water-cement ratio of 45% in the stirring process to obtain uniform slurry. And finally, adding 15g of crushed waste polystyrene foam particles with the diameter of 2-4mm into the slurry, stirring for 120s, and pouring the obtained slurry into a mold for molding. The mold filled with the slurry is placed under the curing conditions of 20 +/-2 ℃ and 99 percent of humidity, and is demoulded after 24-hour curing.
(3) The concrete test block prepared in the embodiment is tested according to the standard JC/T2458-2018 polystyrene particle foam concrete, the performance of the concrete test block is compared with that of the concrete prepared from commercial polystyrene particles, and the results are shown in Table 4; as can be seen from the table, the compressive strength of the foam concrete prepared by using the waste polystyrene particles can reach 3.0Mpa, which is obviously higher than that of the foam concrete prepared by using the commercial polystyrene particles under the same density. Meanwhile, the heat insulation performance of the foam concrete prepared by the waste polystyrene particles is also improved. The reason why the compressive strength of the foam concrete prepared by adding the waste polystyrene particles is higher than that of the foam concrete prepared by commercial polystyrene particles is that: the waste polystyrene particles are all processed polystyrene and are re-granulated, the formed particles are not regular in shape, more edges and holes exist on the surface, and the contact with the iron aluminate cementing material is increased, so that the iron aluminate cementing material prepared by the method disclosed by the invention is better combined with the thermal insulation aggregate, and the compressive strength is increased.
(4) Referring to GB/T50082-2009 Experimental method Standard for Long-term Performance and durability of ordinary concrete, the results of the freeze-thaw cycle experiments performed on the polystyrene foam concrete prepared in this example are shown in Table 5, and it can be seen that, compared with the conventional ordinary portland cement, after 200 times of freeze-thaw cycles, the relative dynamic elastic modulus of the foam concrete prepared from the solid waste ferrous aluminate cementing material is only 71.2%, which indicates that the foam concrete has an obvious advantage in terms of freezing resistance.
TABLE 4 Properties of foamed concrete made of polystyrene particles from different sources
Figure BDA0002876313340000091
TABLE 5 results of testing the frost resistance of foam concrete prepared from cementitious materials of different sources
Figure BDA0002876313340000092
Example 2
1. A method for preparing an iron-aluminum series cementing material by using all industrial solid wastes comprises the following steps:
(1) weighing steel slag, aluminum slag, carbide slag and phosphogypsum respectively according to the mass ratio of 17.20 percent to 20.99 percent to 40.14 percent to 21.67 percent, adding different amounts of raw materials into a dry mill respectively for grinding, and controlling the fineness of the raw materials to be about 8 percent of the residue of a square-hole sieve with 0.08mm, wherein the chemical component analysis of the steel slag, the aluminum slag, the carbide slag and the phosphogypsum is shown in table 1;
(2) and (2) adding the raw materials ground in the step (1) into a dry grinding method, uniformly mixing, then putting into a rotary kiln for calcination, wherein the calcination temperature is 1270 ℃, the heat preservation time is 30min, and after calcination is finished, rapidly cooling at room temperature to obtain clinker.
(3) The obtained clinker and 15% of phosphogypsum are added into a dry mill together and ground until the fineness is about 10% of the residue of a square-hole sieve with the fineness of 0.08 mm.
2. A preparation method of a heat insulation light material for roadbeds in all-solid waste frozen soil areas comprises the following steps:
(1) 270g of the iron-aluminum cementing material, 90g of phosphogypsum and 90g of fly ash are weighed according to the mass, 0.4% of polycarboxylic acid water reducing agent and 0.2% of hydroxypropyl methyl cellulose ether are added and mixed uniformly to obtain a mixture, and the mixture is dry-ground until the screen residue of a square-hole screen with the fineness of 0.08mm is about 10%.
(2) And (2) putting the mixture obtained in the step (1) into a stirring pot, and adding water according to the water-cement ratio of 45% in the stirring process to obtain uniform slurry. And finally, adding 15g of waste polystyrene foam particles with the diameter of 4-6mm into the slurry, stirring for 120s, and pouring the obtained slurry into a mold for molding. The mold with the slurry is placed under the curing condition of 20 +/-2 ℃ and the humidity of 99 percent, and is released after 24 hours of curing.
Example 3
1. A method for preparing an iron-aluminum series cementing material by using all industrial solid wastes comprises the following steps:
(1) respectively weighing 23.61 percent by mass, 18.30 percent by mass, 39.20 percent by mass, 18.89 percent by mass and 18.30 percent by mass of steel slag, aluminum slag, carbide slag and phosphogypsum, respectively adding different amounts of raw materials into a dry mill for grinding, wherein the fineness of the raw materials is controlled to be about 8 percent of the residue of a square-hole sieve with the size of 0.08mm, and the chemical component analysis of the steel slag, the aluminum slag, the carbide slag and the phosphogypsum is shown in table 1;
(2) and (2) adding the raw materials ground in the step (1) into a dry mill, uniformly mixing, then putting into a rotary kiln for calcination, wherein the calcination temperature is 1230 ℃, the heat preservation time is 40min, and after calcination is finished, rapidly cooling at room temperature to obtain the clinker.
(3) The obtained clinker and 15% of phosphogypsum are added into a dry mill together and ground until the fineness is about 10% of the residue of a square-hole sieve with the fineness of 0.08 mm.
2. A preparation method of a heat insulation light material for roadbeds in all-solid waste frozen soil areas comprises the following steps:
(1) 270g of the iron-aluminum cementing material, 135g of phosphogypsum and 45g of fly ash are weighed according to the mass, 0.5% of polycarboxylic acid water reducing agent and 0.1% of hydroxypropyl methyl cellulose ether are added and mixed uniformly to obtain a mixture, and the mixture is dry-ground until the screen residue of a square-hole screen with the fineness of 0.08mm is about 10%.
(2) And (2) putting the mixture obtained in the step (1) into a stirring pot, and adding water according to the water-cement ratio of 42% in the stirring process to obtain uniform slurry. And finally, adding 13g of waste polystyrene foam particles with the diameter of 3-5mm into the slurry, stirring for 120s, and pouring the obtained slurry into a mold for molding. The mold with the slurry is placed under the curing condition of 20 +/-2 ℃ and the humidity of 99 percent, and is released after 24 hours of curing.
Example 4
1. A method for preparing an iron-aluminum gelled material from whole industrial solid wastes comprises the following steps:
(1) respectively weighing the steel slag, the aluminum slag, the carbide slag and the phosphogypsum according to the mass ratio of 18.66 percent to 20.62 percent to 39.42 percent to 21.29 percent, respectively adding different amounts of raw materials into a dry mill for grinding, wherein the fineness of the raw materials is controlled to be about 8 percent of the residue of a square-hole sieve with 0.08mm, and the chemical component analysis of the steel slag, the aluminum slag, the carbide slag and the phosphogypsum is shown in table 1;
(2) and (2) adding the raw materials ground in the step (1) into a dry mill, uniformly mixing, then putting into a rotary kiln for calcination, wherein the calcination temperature is 1230 ℃, the heat preservation time is 40min, and after calcination is finished, rapidly cooling at room temperature to obtain the clinker.
(3) The obtained clinker and 15% of phosphogypsum are added into a dry mill together and ground until the fineness is about 10% of the residue of a square-hole sieve with the fineness of 0.08 mm.
2. A preparation method of a heat insulation light material for roadbeds in all-solid waste frozen soil areas comprises the following steps:
(1) 315g of the iron-aluminum cementing material, 70g of phosphogypsum and 65g of fly ash in the embodiment are weighed according to the mass, 0.3% of polycarboxylic acid water reducing agent and 0.3% of hydroxypropyl methyl cellulose ether are added and mixed uniformly to obtain a mixture, and the mixture is dry-ground until the screen residue of a square-hole screen with the fineness of 0.08mm is about 10%.
(2) And (2) putting the mixture obtained in the step (1) into a stirring pot, and adding water according to the water-cement ratio of 45% in the stirring process to obtain uniform slurry. And finally, adding 12g of waste polystyrene foam particles with the diameter of 1-2mm into the slurry, stirring for 120s, and pouring the obtained slurry into a mold for molding. The mold with the slurry is placed under the curing condition of 20 +/-2 ℃ and the humidity of 99 percent, and is released after 24 hours of curing.
Example 5
1. A method for preparing an iron-aluminum series cementing material by using all industrial solid wastes comprises the following steps:
(1) weighing the steel slag, the aluminum slag, the carbide slag and the phosphogypsum respectively according to the mass ratio of 21.80 percent to 18.77 percent to 41.66 percent to 17.77 percent, adding different amounts of raw materials into a dry mill respectively for grinding, wherein the fineness of the raw materials is controlled to be about 8 percent of the residue of a square-hole sieve with 0.08mm, and the chemical component analysis of the steel slag, the aluminum slag, the carbide slag and the phosphogypsum is shown in table 1;
(2) and (2) adding the raw materials ground in the step (1) into a dry grinding method, uniformly mixing, then putting into a rotary kiln for calcination, wherein the calcination temperature is 1270 ℃, the heat preservation time is 30min, and after calcination is finished, rapidly cooling at room temperature to obtain clinker.
(3) The obtained clinker and 15% of phosphogypsum are added into a dry mill together and ground until the fineness is about 10% of the residue of a square-hole sieve with the fineness of 0.08 mm.
2. A preparation method of a heat insulation light material for roadbeds in all-solid waste frozen soil areas comprises the following steps:
(1) 360g of the iron-aluminum series cementing material, 45g of the phosphogypsum and 45g of the fly ash are weighed according to the mass, 0.5% of polycarboxylic acid water reducing agent and 0.2% of hydroxypropyl methyl cellulose ether are added and mixed uniformly to obtain a mixture, and the mixture is dry-ground until the screen residue of a square-hole screen with the fineness of 0.08mm is about 10%.
(2) And (2) putting the mixture obtained in the step (1) into a stirring pot, and adding water according to the water-cement ratio of 40% in the stirring process to obtain uniform slurry. And finally, adding 17g of waste polystyrene foam particles with the diameter of 2-4mm into the slurry, stirring for 120s, and pouring the obtained slurry into a mold for molding. The mold with the slurry is placed under the curing condition of 20 +/-2 ℃ and the humidity of 99 percent, and is released after 24 hours of curing.
The performance of the heat insulation and preservation light material for the roadbed in the all-solid waste frozen soil area prepared in the embodiment 2-5 is similar to that of the material prepared in the embodiment 1.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (11)

1. The heat-insulation and heat-preservation light material for the roadbed in the all-solid-waste frozen soil area is characterized by comprising the following raw materials, by mass, 35-50 parts of an iron aluminate cementing material, 5-25 parts of phosphogypsum, 5-25 parts of fly ash, 0.04-0.5 part of a polycarboxylic acid water reducing agent, 0.02-0.05 part of hydroxypropyl methyl cellulose ether, 27-29 parts of water and 1.5-2.5 parts of waste polystyrene particles;
the iron aluminate cementing material comprises, by mass, 17-22 parts of steel slag, 18-21 parts of aluminum slag, 38-42 parts of carbide slag and 17-42 parts of phosphogypsum; the minerals of the ferroaluminate cementing material mainly comprise tetracalcium ferroaluminate, calcium sulphoaluminate, dicalcium silicate and calcium sulfate;
the preparation method of the iron aluminate cementing material comprises the following steps: respectively grinding steel slag, aluminum slag, carbide slag and a part of phosphogypsum, mixing to obtain a gel mixture, calcining the gel mixture to obtain a cementing material clinker, mixing the cementing material clinker with the other part of phosphogypsum, and grinding to obtain an iron aluminate cementing material; wherein the mass ratio of the steel slag, the aluminum slag, the carbide slag and the phosphogypsum in the gel mixture is 17-22: 18-21: 38-42: 17-22; the addition amount of the other part of phosphogypsum is 0-20% of the mass of the cementing material clinker, wherein the addition amount of the other part of phosphogypsum is not 0;
in the components of the iron aluminate cementing material, CaO is 41.29wt.%, and Al is 41.29wt.% 2 O 3 23.35 wt.%，Fe 2 O 3 9.14 wt.%，SiO 2 8.81wt. %，SO 3 8.38wt. %， TiO 2 1.62wt. %，MgO 2.14wt. %。
2. The heat-insulating light-weight material for the roadbed in the all-solid waste frozen soil region as claimed in claim 1, wherein the raw material of the gel mixture is ground by a dry method.
3. The heat-insulating and heat-preserving lightweight material for the roadbed in the all-solid-waste frozen soil region as claimed in claim 1, wherein the fineness of the raw material of the gel mixture after grinding is controlled to be 6-10% of the residue of a square-hole sieve with 0.08 mm.
4. The heat-insulating and heat-preserving lightweight material for the roadbed in the all-solid-waste frozen soil region as claimed in claim 1, wherein the clinker of the cementing material is mixed with the phosphogypsum, and the fineness of grinding is controlled to be 6-10% of the residue of a 0.08mm square-hole sieve.
5. The heat-insulating light-weight material for the roadbed in the all-solid waste frozen soil region as claimed in claim 1, wherein the calcining temperature is 1200-1300 ℃.
6. The heat-insulating light-weight material for the roadbed in the all-solid-waste frozen soil region as claimed in claim 1, wherein the calcination time is 30-60 min.
7. The heat-insulating light-weight material for the roadbed in the all-solid-waste frozen soil region as claimed in claim 1, wherein the particle size of the waste polystyrene particles is 2-4 mm.
8. The preparation method of the heat-insulating and heat-preserving lightweight material for the roadbed in the all-solid-waste frozen soil region, which is disclosed by claim 1, is characterized by comprising the steps of grinding and uniformly mixing an iron aluminate cementing material, phosphogypsum, fly ash, a polycarboxylic acid water reducing agent and hydroxypropyl methyl cellulose ether to obtain a roadbed mixture, adding water into the roadbed mixture to obtain roadbed slurry, adding waste polystyrene particles into the roadbed slurry, stirring, introducing the mixture into a mold, and hardening.
9. The method for preparing the heat-insulating light-weight material for the roadbed in the all-solid-waste frozen soil region as claimed in claim 8, wherein the water-cement ratio of the prepared roadbed slurry is 0.40-0.50.
10. The method for preparing the heat-insulating light material for the roadbed in the all-solid-waste frozen soil area as claimed in claim 8, wherein the hardening time is 20-30 h.
11. The method for preparing the heat-insulating light material for the roadbed in the all solid waste frozen soil area as claimed in claim 8, wherein the hardening conditions are as follows: the temperature is 18-22 ℃, and the humidity is 98.6-99.4%.
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