CN114988820A - Cold-recycling mixture based on aluminosilicate cementing material and design and preparation method - Google Patents

Cold-recycling mixture based on aluminosilicate cementing material and design and preparation method Download PDF

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CN114988820A
CN114988820A CN202210621471.9A CN202210621471A CN114988820A CN 114988820 A CN114988820 A CN 114988820A CN 202210621471 A CN202210621471 A CN 202210621471A CN 114988820 A CN114988820 A CN 114988820A
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aluminosilicate
cold
cementing material
recycling
cementing
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王昊
董昭
章清涛
张新
马士杰
马涛
柳久伟
徐书东
徐光霁
孙兆云
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Southeast University
Shandong Hi Speed Co Ltd
Shandong Transportation Institute
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Southeast University
Shandong Hi Speed Co Ltd
Shandong Transportation Institute
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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
    • C04B28/02—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
    • C04B28/06—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
    • 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
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C3/00—Foundations for pavings
    • E01C3/003—Foundations for pavings characterised by material or composition used, e.g. waste or recycled material
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0001—Type of application of the stress
    • G01N2203/0003—Steady
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0001—Type of application of the stress
    • G01N2203/0005—Repeated or cyclic
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0014—Type of force applied
    • G01N2203/0016—Tensile or compressive
    • G01N2203/0019—Compressive
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0014—Type of force applied
    • G01N2203/0023—Bending
    • 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)
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Abstract

The invention discloses a cold-recycling mixture design method based on an aluminosilicate cementing material, which comprises the steps of adopting a preparation method of the aluminosilicate cementing material in the cold-recycling mixture, obtaining the element and oxide composition of an active material through XRD and XRF analysis, determining the relative addition proportion of the active material based on different molar ratios, and mixing the active material with water glass to form the aluminosilicate cementing material; and then mixing the cold-recycling mixed material with old asphalt, new aggregate and emulsified asphalt to form a cold-recycling mixed material, carrying out a compression strength and fatigue performance test, and determining the optimal mixing amount of each active material based on the determined optimal molar ratio of the optimal material performance, so that the aluminosilicate cementing material can be adopted in engineering application on a large scale. The invention solves the defects of poor fatigue resistance and the like of the cement cementing material in the cold-recycling mixture, and the active material is mainly derived from solid waste, thereby solving the problems of environmental pollution and energy consumption in the cement production process and having obvious economic value and environmental benefit.

Description

Cold-recycling mixture based on aluminosilicate cementing material and design and preparation method
Technical Field
The invention belongs to the field of design of road cold-recycling mixed materials, and particularly relates to a cold-recycling mixed material based on an aluminosilicate cementing material and a design and preparation method thereof.
Background
At present, the rapid development of highway construction in China is accompanied by maintenance and repair tasks of a huge road network. The highway built successively after 90 years has entered the period of major and middle maintenance, and the highway maintenance has been changed from the traditional "rush-repair era" to the "comprehensive maintenance era". However, in the traditional maintenance mode, a large amount of asphalt mixture milling materials are degraded and used even if the asphalt mixture milling materials are utilized squarely, high-value pavement materials are used as a common basic filler storage yard, and waste and environmental pollution are caused by land occupation and landfill. The continuous use of a large amount of new stones can cause serious ecological damage when the mountains are excavated and the stones are mined, and the defects of long construction time, comprehensive traffic closure, high economic resource cost and the like exist at the same time. Along with the social economic development and the gradual depletion of mineral resources, the contradiction between the project time cost, the huge resource loss and the engineering economy and durability is increasingly prominent.
In view of the above background, the regeneration technique has been widely used in recent years. The asphalt pavement recycling technology is divided into hot recycling and cold recycling, and further divided into plant mixing recycling and on-site recycling according to the difference of mixing processes. The cold regeneration technology adds emulsified asphalt or foamed asphalt at room temperature for mixing, the utilization rate of old materials can reach 80-90%, energy consumption and environmental pollution can be greatly reduced, and the technology has wide application prospect. The cold-recycling mixture is mainly applied to a road base at present, and standard design is carried out on the top compressive stress and the bottom tensile stress of the base in an asphalt mixture design method so as to reduce the permanent deformation and fatigue failure of a pavement in a service period. However, a certain amount of cement is added into the cold recycling mixture, and a cement hydration product has certain brittleness, so that the material has better compressive strength, but the fatigue resistance of the material is reduced, so that fatigue failure is generated, the pavement is cracked from bottom to top, and the basic service performance of the road is influenced.
Therefore, how to improve the performance index of the cold recycling material also becomes the focus of attention at home and abroad. The geopolymer is a composite cementing material with good mechanical property and durability, which is generated by taking silicon-aluminum solid wastes such as fly ash, mineral powder, metakaolin and the like as raw materials and under the excitation action of a composite alkali activator. Compared with cement, the main component of the cement is industrial solid waste, and the cement is an energy-saving and environment-friendly material without high-temperature calcination in the production process. Based on certain research, the invention adopts aluminosilicate cementing material to replace cement to be applied in cold-recycling mixture, and provides a corresponding design method.
Disclosure of Invention
In order to solve the problems, the invention discloses a design method of a cold-recycling asphalt mixture based on an aluminosilicate cementing material, which comprises the following materials: old asphalt, new aggregate, emulsified asphalt and aluminosilicate cementing material; the aluminosilicate cementing material accounts for less than or equal to 5% by mass, and comprises active materials, a composite alkali activator and water, wherein the composite alkali activator comprises a mixture of one or more of sodium hydroxide, potassium carbonate, sodium carbonate and solid sodium silicate and water glass; the active material comprises one or more of fly ash, mineral powder, metakaolin and the like; the water-cement mass ratio of the aluminosilicate cementing material is 0.1-1; the aluminosilicate gel comprises components with a plurality of molar ratios, namely SiO2: Al2O3, SiO2: Na2O and SiO2: CaO.
Further, the old asphalt material accounts for 50-100% of the total aggregate by weight;
further, the new aggregate mass is the total aggregate mass minus the old asphalt mass by weight;
further, the mixing amount of the emulsified asphalt is 3-8% by weight, which is the ratio of the mass of the emulsified asphalt to the total mass of the aggregate;
further, the content of the aluminosilicate cementing material is determined based on material performance tests.
The aluminosilicate cementing material comprises an active material and a composite alkali activator.
Further, the aluminosilicate cementing material comprises one or more of fly ash, mineral powder, metakaolin and the like;
further, the compound alkali activator comprises a mixture of one or more of sodium hydroxide, potassium carbonate, sodium carbonate, solid sodium silicate and the like and water glass, wherein the sodium hydroxide is sodium hydroxide analytically pure, the purity of the sodium hydroxide is higher than 90%, the modulus of the water glass is 0.5-5.6, and the baume degree of the water glass is 22.0-45.0.
Further, the range of the mole ratio of the composite material binding material suitable for the cold-recycling mixture is as follows:
Na 2 O：Al 2 O 3 0.1~3.2
SiO 2 ：Al 2 O 3 3.0~9.5；
CaO：Al 2 O 3 0.2~7。
the preparation method of the cold-recycling asphalt mixture of the aluminosilicate cementing material comprises the following steps:
(1) selecting one or more active materials of fly ash, mineral powder, metakaolin and the like, and carrying out XRD (X-ray diffraction) and XRF (X-ray diffraction) test analysis to determine the element composition and the relative content of each oxide in the active materials;
further, the XRD and XRF test analysis of the active material can quantify the element composition and the relative content of each oxide of the active material, and the relative content of each component can be finely adjusted according to the molar ratio.
(2) Based on the 3 molar ratio value ranges recited in claim 3, respectively taking the value of 0.1 for each molar ratio interval to form an orthogonal distribution combination scheme, and adjusting the relative content of the active material according to each molar ratio;
further, the orthogonal distribution value is performed for each molar ratio, taking 3 molar ratios as an example, and assuming that the interval numbers of the 3 molar ratios are respectively the valuesg，h，kThen the total number of schemes isg×h×k。
Furthermore, the value of the 3 molar ratios can be adjusted, and the molar ratio variable can be reduced according to the actual situation and the available active material types.
(3) One or more of sodium oxide, potassium carbonate, sodium carbonate, solid sodium silicate and the like are selected to be mixed with water glass to prepare a composite alkali activator, and the composite alkali activator and an active material are mixed and stirred to form an aluminosilicate cementing material;
(4) mixing and stirring the aluminosilicate cementing material, the old asphalt material, the new aggregate and the emulsified asphalt to prepare an aluminosilicate-cold regeneration mixture, and carrying out normal-temperature curing or standard curing box curing.
The design method of the cold-recycling asphalt mixture of the aluminosilicate cementing material comprises the following steps:
(1) based on the cold-recycling asphalt mixture test piece completed through maintenance, tests on the compressive strength and the fatigue performance are carried out.
(2) Based on the above test results, the optimum molar ratio at the optimum compressive strength and fatigue strength was analyzed.
(3) The optimal mixing amount of each active material under the optimal molar ratio is obtained.
Further, the compressive strength in the step (1) can be tested by adopting uniaxial compressive strength and triaxial compressive strength tests;
further, the fatigue test in the step (2) can be performed by using test methods such as an indirect tensile fatigue test, a three-point bending fatigue test, a four-point bending fatigue test, a semi-circular bending test and the like.
The technical scheme implemented by the invention has the beneficial effects that:
(1) compared with the traditional cold-recycling asphalt mixture added with cement, the adoption of the aluminosilicate cementing material can reduce the environmental pollution and energy consumption caused in the cement production process, and is more environment-friendly.
(2) Compared with cement materials, the aluminosilicate cementing material has higher strength and toughness, and can better meet the mechanical property requirement of cold-recycling mixed materials as base materials.
(3) The improvement effect of the strength and the fatigue performance of the aluminosilicate cementing material in the cold regeneration mixture is evaluated, the optimal addition amount of each active material is accurately and quickly determined, and the large-scale application in engineering can be realized.
Drawings
FIG. 1 is a flow chart of a design process of the present invention based on the use of aluminosilicate cementitious materials in cold-recycling mixes.
Detailed Description
The present invention will be further illustrated with reference to the accompanying drawings and detailed description, which will be understood as being illustrative only and not limiting in scope. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
The embodiment of the invention provides a cold-recycling mixture of an aluminosilicate cementing material, which comprises the following materials: old asphalt material, new aggregate, emulsified asphalt and aluminosilicate cementing material. The main components of the aluminosilicate cementing material comprise an active material and a composite alkali activator, the composite alkali activator mainly comprises a mixture of one or more of sodium hydroxide, potassium carbonate, sodium carbonate, solid sodium silicate and the like and water glass, and the active material comprises one or more of fly ash, mineral powder and metakaolin. And a plurality of mol ratios exist among the components of the aluminosilicate cementing material:
Na 2 O：Al 2 O 3 0.1~3.2
SiO 2 ：Al 2 O 3 3.0~9.5；
CaO：Al 2 O 3 0.2~7。
weighing the following raw materials by mass: the asphalt old material is weighed according to 50-100% of the total mass, the rest is new aggregate, the emulsified asphalt content is 3-8%, the specific addition amount is determined according to the maximum splitting strength and the dry-wet splitting strength value, and the addition amount of the aluminosilicate cementing material is 1-3%.
The embodiment of the invention provides a preparation method of a cold-recycling asphalt mixture of an aluminosilicate cementing material, which comprises the following steps:
(1) one or more active materials of fly ash, mineral powder, metakaolin and the like are selected, XRD and XRF test analysis is carried out, and the element composition and the relative content of each oxide in the active materials are determined.
Further, the elemental composition and oxide content of the active material are mainly determined, especially the elements Na, Al, Ca, Si and Na in each active material 2 O，Al 2 O 3 ，SiO 2 And the relative content of CaO.
Furthermore, the molar ratio is realized through the adding proportion of various active materials, and the large-scale application of the active materials can be realized on the basis of determining the optimal molar ratio.
(2) Based on the 3 molar ratio value ranges recited in claim 3, the value interval of each molar ratio is 0.1, an orthogonal distribution combination scheme is formed, and the relative content of the active material is adjusted according to each molar ratio.
Further, as mentioned above, based on the value intervals of each molar ratio, the value of each molar ratio interval is 0.1, and an orthogonal combination scheme is formed, taking 3 molar ratios as an example, and assuming that the value intervals of the 3 molar ratios are respectively the number of the 3 molar ratiosg，h，kThen the total number of schemes isg×h×k。
Further, the experimental protocol for different molar ratios was by adjusting the relative amounts of each active material to achieve the predetermined molar ratio.
(3) One or more of sodium oxide, potassium carbonate, sodium carbonate, solid sodium silicate and the like are selected to be mixed with water glass to prepare the composite alkali activator, and the composite alkali activator and the active material are mixed and stirred to form the aluminosilicate gel material.
Furthermore, the compound alkali activator is prepared by mixing one or more of sodium hydroxide, sodium oxide, potassium carbonate, sodium carbonate, solid sodium silicate and the like with water glass.
Specifically, further, sodium hydroxide and water glass are fully stirred and fused, the mass of a sodium hydroxide solution is weighed after cooling, the mass of water volatilization caused in the process of melting water by sodium hydroxide is supplemented, and the compound alkali activator is prepared.
Specifically, the composite alkali activator, the active material in the predetermined molar ratio and water are added into a stirring pot and stirred for 3 to 5 minutes to obtain the aluminosilicate cementing material.
(4) Mixing and stirring the aluminosilicate cementing material, the old asphalt material, the new aggregate and the emulsified asphalt for 2 to 4 minutes, molding an aluminosilicate cold-recycling mixture test piece, and carrying out normal-temperature curing or standard curing box curing.
Furthermore, the test piece types comprise a Marshall test piece and a rotary compaction test piece.
Further, the specific technical details of the normal temperature curing and the standard curing box curing can be divided into various factor differences such as curing time, time cutting time, curing environment and the like, and the specific curing details are not elaborated herein, but the curing aspect related to the cold regeneration mixture of the aluminosilicate cementing material is within the protection scope of the invention.
The embodiment of the invention provides a design method of a cold-recycling asphalt mixture of an aluminosilicate cementing material, which comprises the following steps:
(1) based on the cold-recycling asphalt mixture test piece completed through maintenance, tests on the compressive strength and the fatigue performance are carried out.
Furthermore, the compressive strength can be tested by adopting uniaxial compressive strength and triaxial compressive strength tests;
furthermore, the fatigue test can be performed by adopting test methods such as an indirect tensile fatigue test, a three-point bending fatigue test, a four-point bending fatigue test, a semi-circle bending test and the like.
Further, the compressive strength and fatigue tests described involve a variety of test methods, only the most commonly used test methods being listed here.
(2) Based on the above test results, the optimum molar ratio at the optimum compressive strength and fatigue strength was analyzed.
The optimal molar ratio is based on the most significant value of the optimal compression strength and fatigue strength, and the optimal fatigue strength value is taken as the optimal index of the optimal molar ratio on the basis of meeting the compression strength of the cold regenerated base material in the design specification.
(3) The optimal mixing amount of each active material under the optimal molar ratio is obtained.
The obtained optimal molar ratio has a relation with various indexes of the mixture such as the source of the old asphalt material, the performance of aged asphalt, the performance of emulsified asphalt and the like, so that when the aluminosilicate cementing material is applied to a cold-recycling mixture, a scheme needs to be independently designed for a certain project.
Further, the combination of the elemental and oxide compositions of XRD and XRF, as well as the optimum molar ratios based on material property tests, allows for large scale application of aluminosilicate cements based on both relationships in a given engineering application.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
The technical means disclosed in the invention scheme are not limited to the technical means disclosed in the above embodiments, but also include the technical scheme formed by any combination of the above technical features.

Claims (7)

1. Cold-recycling mix based on aluminosilicate cementitious material, characterized in that it comprises the following composition of materials: old asphalt, new aggregate, emulsified asphalt and aluminosilicate cementing material; the aluminosilicate cementing material accounts for less than or equal to 5% by mass, and comprises active materials, a composite alkali activator and water, wherein the composite alkali activator comprises a mixture of one or more of sodium hydroxide, potassium carbonate, sodium carbonate and solid sodium silicate and water glass; the active material comprises one or more of fly ash, mineral powder, metakaolin and the like; the water-cement mass ratio of the aluminosilicate cementing material is 0.1-1; the aluminosilicate gel contains components in a plurality of molar ratios, namely SiO 2 : Al 2 O 3 ，SiO 2 : Na 2 O and SiO 2 : CaO。
2. The cold-recycling mix based on aluminosilicate cementitious material as claimed in claim 1, wherein the water glass has a modulus of 0.5 to 5.6 and a baume degree of 22.0 to 45.0.
3. The method for designing a cold-recycling mix based on aluminosilicate cementing material according to claim 1, wherein the steps of: the mixing amount of the old asphalt material is 50-100%, the mixing amount of the new aggregate is the total aggregate mass minus the mixing amount of the old asphalt material, the mixing amount of the emulsified asphalt is 3-8%, and the reasonable mixing amount of the aluminosilicate cementing material is determined based on material performance tests.
4. A cold-recycling mix process based on aluminosilicate cementitious material according to claim 1, characterised in that: the range of the mole ratio of the composite material cementing material is as follows:
Na 2 O：Al 2 O 3 0.1~3.2
SiO 2 ：Al 2 O 3 3.0~9.5；
CaO：Al 2 O 3 0.2~7。
5. the method for designing and preparing the cold-recycling mix based on the aluminosilicate cementing material according to the claim 1, wherein the method comprises the following steps: the determination steps of the mole ratio of the composite material cementing material are as follows:
(1) selecting one or more active materials of fly ash, mineral powder and metakaolin, and carrying out XRD and XRF test analysis to determine the element composition and the relative content of each oxide in the active materials;
(2) the value range based on the mole ratio of the composite material gelled material; respectively taking the value of each molar ratio at an interval of 0.1 to form an orthogonal combination scheme, and adjusting the relative content of the active materials according to each molar ratio;
(3) one or more of sodium oxide, potassium carbonate, sodium carbonate, solid sodium silicate and the like are selected to be mixed with water glass to prepare a composite alkali activator, and the composite alkali activator and an active material are mixed and stirred to form an aluminosilicate gel material;
(4) mixing and stirring the aluminosilicate cementing material, the old asphalt material, the new aggregate and the emulsified asphalt simultaneously to prepare an aluminosilicate-cold regeneration mixture, and carrying out normal-temperature maintenance or standard maintenance box maintenance;
(5) the cured aluminosilicate-cold recycled mix was subjected to compressive strength and fatigue strength tests, each optimum molar ratio being determined based on the optimum compressive strength and fatigue strength.
6. As in claimThe design and preparation method of the cold-recycling mixture based on the aluminosilicate cementing material, which is characterized by comprising the following steps of: the orthogonal distribution value is carried out on each molar ratio, 3 molar ratios are taken as an example, and the interval numbers of the 3 molar ratios are respectively assumed to beg，h，kThen the total number of schemes isg×h×k。
7. The method for designing and preparing the cold-recycling mix based on the aluminosilicate cementing material according to the claim 5, wherein the steps of: the compressive strength can be tested by adopting uniaxial compressive strength and triaxial compressive strength tests; the fatigue test can be performed by adopting an indirect tensile fatigue test, a three-point bending fatigue test, a four-point bending fatigue test and a semi-circle bending test.
CN202210621471.9A 2022-06-02 2022-06-02 Cold-recycling mixture based on aluminosilicate cementing material and design and preparation method Pending CN114988820A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115504738A (en) * 2022-09-22 2022-12-23 太原理工大学 Pavement material of coal liquefaction residue based geopolymer emulsified asphalt mixture and preparation method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115504738A (en) * 2022-09-22 2022-12-23 太原理工大学 Pavement material of coal liquefaction residue based geopolymer emulsified asphalt mixture and preparation method thereof

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