CN112801538A - Performance evaluation method for solid waste broken granular road - Google Patents
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- 239000002910 solid waste Substances 0.000 title claims abstract description 113
- 238000011156 evaluation Methods 0.000 title claims description 27
- 239000002245 particle Substances 0.000 claims abstract description 48
- 238000000034 method Methods 0.000 claims abstract description 42
- 238000012360 testing method Methods 0.000 claims abstract description 40
- 238000011056 performance test Methods 0.000 claims abstract description 15
- 230000001172 regenerating effect Effects 0.000 claims abstract description 5
- 238000012216 screening Methods 0.000 claims abstract description 5
- 239000011159 matrix material Substances 0.000 claims description 71
- 239000008187 granular material Substances 0.000 claims description 15
- 239000012535 impurity Substances 0.000 claims description 9
- 238000005056 compaction Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 230000035515 penetration Effects 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims 1
- 238000011161 development Methods 0.000 abstract description 5
- 238000005259 measurement Methods 0.000 abstract description 4
- 238000010276 construction Methods 0.000 description 14
- 239000002689 soil Substances 0.000 description 7
- 239000002699 waste material Substances 0.000 description 6
- 230000018109 developmental process Effects 0.000 description 4
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 101100161752 Mus musculus Acot11 gene Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
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Abstract
The invention relates to the field of road engineering, in particular to a method for evaluating the road performance of solid waste broken granular particles, which comprises the following steps: screening and grading test are carried out on the solid waste crushed granular bodies; configuring m solid waste broken granular regenerated aggregates with different grades according to the grading test result; carrying out performance test on n performances of various solid waste broken granular regenerated aggregates; and evaluating the performance of each solid waste broken granular particles for regenerating the aggregate road according to the performance test result. The invention can perfectly and reasonably evaluate the road performance of the solid waste broken granular particles, and provides a measurement standard for the secondary utilization of the solid waste broken granular particles in the field of road engineering so as to realize the saving of building resources and the green sustainable development.
Description
Technical Field
The invention relates to the technical field of road engineering, in particular to a method for evaluating the performance of a solid waste broken granular body road.
Background
With the continuous promotion of the urbanization progress and the new rural construction in China, a large amount of construction waste is generated in the construction and construction of urban canopy area reconstruction, new rural house arrangement construction, road reconstruction and extension projects and the like, and the construction waste comprises the following steps: waste concrete, waste bricks, waste soil and the like. The traditional construction waste treatment method not only occupies a large amount of land resources, but also brings geological disasters such as landslide and the like due to a large amount of open-air stacking, and causes huge hidden dangers to the life and property safety of people. The highway construction in China mostly adopts a high roadbed mode, and a large amount of sand stones are needed, so the construction solid waste is subjected to regeneration treatment to replace the sand stones as the roadbed filler, the harm of the construction solid waste can be solved, meanwhile, the construction resources can be saved, and the green sustainable development can be realized. However, since the components of the construction solid waste are complex, the construction solid waste can be put into use only by strictly sieving and reprocessing, and at the present stage, no complete evaluation system for the pavement performance of the construction solid waste exists.
Disclosure of Invention
Aiming at the technical problems, the method for evaluating the road performance of the solid waste broken granular particles can perfectly and reasonably evaluate the road performance of the solid waste broken granular particles, and provides a measurement standard for the secondary utilization of the solid waste broken granular particles in the field of road engineering so as to realize the saving of building resources and the green sustainable development.
In order to achieve the purpose, the invention adopts the technical scheme that:
the invention provides a method for evaluating the performance of a solid waste broken granular body road, which is characterized by comprising the following steps:
screening and grading test are carried out on the solid waste crushed granular bodies;
configuring m solid waste broken granular regenerated aggregates with different grades according to the grading test result;
carrying out performance test on n performances of various solid waste broken granular regenerated aggregates;
and evaluating the performance of each solid waste broken granular particles for regenerating the aggregate road according to the performance test result.
Preferably, the performance tested by the step of performing performance test on various solid waste broken granular regenerated aggregates comprises the following steps: coefficient of non-uniformity cuCoefficient of curvature ccImpurity content I, bearing ratio CBR, modulus of resilience E of solid waste broken granular particles regenerated aggregate0。
Preferably, the step of evaluating the performance of each solid waste broken granular loose regenerated aggregate road according to the performance test result comprises the following steps:
for m solid waste broken granular regenerated aggregates and n performances, constructing an evaluation index matrix of the solid waste broken granular regenerated aggregates of each gradation;
standardizing the evaluation index matrix to obtain a standard matrix, and constructing an optimal matter element; solving the association degree of the standard matrix and the optimal gray elements to obtain an association matrix;
constructing an analysis model by using an analytic hierarchy process, wherein the analysis model comprises a target layer, a criterion layer and an index layer; determining the weight coefficient of each index to obtain a judgment matrix;
solving the maximum characteristic value according to the judgment matrix, and measuring the consistency of the judgment matrix by adopting a consistency index; determining an evaluation index weight matrix according to element comparison of the index layer relative to the criterion layer and comparison of the criterion layer relative to the target layer;
determining the correlation degree of the solid waste broken granular regenerated aggregate of each gradation and the optimal gray elements according to the correlation degree matrix and each weight coefficient; and evaluating the pavement performance of the prepared solid waste broken granular particles at all levels according to the degree of association between the regenerated aggregate of the prepared solid waste broken granular particles at all levels and the optimal ash element.
Preferably, the step of constructing an evaluation index matrix of the solid waste broken granular regenerated aggregates of each gradation for n performances of m solid waste broken granular regenerated aggregates is as follows: for m recycled aggregates, n performances, an evaluation index matrix R ═ (C) is constructedij)m×n，
Wherein, CijRepresents the jth performance of the ith reclaimed aggregate, i is 1, …, m; j is 1, …, n.
Preferably, the evaluation index matrix is standardized to obtain a standard matrix, and an optimal object element is constructed; solving the association degree of the standard matrix and the optimal gray elements to obtain an association matrix comprises the following steps: constructing the matrix R ═ (C)ij)m×nIs (B)ij)m×n，
Wherein the content of the first and second substances,
solving the association degree of the standard matrix and the optimal gray elements to obtain an association degree matrix:
wherein
ΔijRepresents the absolute value, Δ, of the difference between the characteristic of element j and the optimal gray element iij＝|C0j-CijL, |; a is a model coefficient.
PreferablyThe analytic model is constructed by using an analytic hierarchy process and comprises a target layer, a criterion layer and an index layer; determining the weight coefficient of each index to obtain a judgment matrix; the method comprises the following steps: constructing a three-level evaluation system according to an analytic hierarchy process, wherein the three-level evaluation system comprises a target layer, a criterion layer and a judgment layer, the target layer is the judgment of final decision, the criterion layer is the requirement of roads with different grades and is divided into expressways, first-level roads and the like, and the index layer is a performance index; according to the standard of the standard layer, performing weight analysis on the index layer and assigning ω, ω being 1, …, 10; obtaining a judgment matrix
Preferably, the maximum eigenvalue is solved according to the judgment matrix, and the consistency of the matrix is measured by adopting a consistency index; determining an evaluation index weight matrix according to the element comparison of the index layer relative to the criterion layer and the comparison of the criterion layer relative to the target layer; the method comprises the following steps: solving the maximum eigenvalue lambda according to an analytic hierarchy processmaxA consistency index CI, a random consistency index RI and a check coefficient CR, wherein
When CR is less than 1, judging the matrix to pass consistency test to obtain a weight matrix omega, omega-omega1ω2ω3ω4]。
Preferably, the correlation degree between the graded solid waste broken granular regenerated aggregate and the optimal ash element is determined according to the correlation matrix and the weighting coefficients; and evaluating the pavement performance of the prepared solid waste broken granular particles at all levels according to the degree of association between the regenerated aggregate of the prepared solid waste broken granular particles at all levels and the optimal ash element. In the step, the relevance degree of the solid waste broken granular regenerated aggregate of each grade and the optimal ash element is RDL，
Preferably, the method for testing the bearing ratio CBR of the solid waste broken granular regenerated aggregate in the step of 'testing the performance of various solid waste broken granular regenerated aggregates' specifically comprises the following steps: the ratio of unit pressure to standard pressure when the penetration amount is 2.5mm is used as the bearing ratio of the solid waste broken granular particles regenerated aggregate,
where p is the unit pressure.
Preferably, the step of testing the load bearing ratio CBR of the solid waste broken granular regenerated aggregate further comprises the following steps:
compacting each group of solid waste broken granular regenerated aggregates according to heavy compaction II-2 category, and solving the maximum dry density and the optimal water content of each group of solid waste broken granular regenerated aggregates;
preparing three dry density test pieces according to the optimal water content for each group of solid waste broken granular regenerated aggregates, wherein the ranges of the dry densities rho d of the three dry density test pieces are rho d less than 95%, rho d more than or equal to 100% in 95% and rho d equal to 100%, each dry density test piece is compacted in three layers, the compaction number of each layer is respectively 30 times, 50 times and 98 times,
and (4) taking the average value of the load ratios CBR measured by the test pieces with different dry densities.
The technical scheme has the following advantages or beneficial effects: the invention relates to the field of road engineering, in particular to a method for evaluating the road performance of solid waste broken granular particles, which comprises the following steps: screening and grading test are carried out on the solid waste crushed granular bodies; configuring m solid waste broken granular regenerated aggregates with different grades according to the grading test result; carrying out performance test on n performances of various solid waste broken granular regenerated aggregates; and evaluating the performance of each solid waste broken granular particles for regenerating the aggregate road according to the performance test result. The invention can perfectly and reasonably evaluate the road performance of the solid waste broken granular particles, and provides a measurement standard for the secondary utilization of the solid waste broken granular particles in the field of road engineering so as to realize the saving of building resources and the green sustainable development.
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The invention and its features, aspects and advantages will become more apparent from reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference symbols in the various drawings indicate like elements. The drawings are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the invention.
FIG. 1 is a schematic flow chart of a method for evaluating the performance of a solid waste broken granular body road according to example 1 of the present invention;
FIG. 2 is a flowchart showing another outline of the method for evaluating the performance of a solid waste broken particulate road provided in example 1 of the present invention.
Detailed Description
In the following, the technical solutions in the embodiments of the present invention are clearly and completely described with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.
Example 1:
referring to fig. 1, the method for evaluating the performance of a solid waste broken granular material road provided by the invention comprises the following steps:
s101, screening and grading test is carried out on solid waste crushed granular particles;
s201, configuring m solid waste broken granular regenerated aggregates with different grades according to a grading test result;
s301, carrying out performance test on n performances of various solid waste broken granular regenerated aggregates;
s401, evaluating the performance of each solid waste broken granular body regeneration aggregate road according to the performance test result.
Specifically, the performance tested in the step S301 of "performing performance test on various solid waste broken granular reclaimed aggregates" includes: coefficient of non-uniformity cuCoefficient of curvature ccImpurity content I, bearing ratio CBR, modulus of resilience E of solid waste broken granular particles regenerated aggregate0. The method for testing the nonuniform coefficient of the solid waste broken granular regenerated aggregate by the step of testing the performance of various solid waste broken granular regenerated aggregates comprises the following steps: respectively taking two parts from each group of regenerated aggregates to test the non-uniformity coefficient cuAnd coefficient of curvature cc，
Taking two uneven coefficients cuAverage value of (2) and two curvature coefficients ccAverage value of (d); wherein d is60The particle size which represents that the mass of the soil particles smaller than the particle size on the particle size distribution curve accounts for 60 percent of the total mass of the soil, and is also called as the limiting particle size; d10The particle size which represents that the mass of the soil particles smaller than the particle size on the particle size distribution curve accounts for 10 percent of the total mass of the soil, and is also called as effective particle size; d30The particle diameter which represents that the mass of the soil particles smaller than the particle diameter on the particle diameter distribution curve accounts for 30% of the total mass of the soil, and is also called as effective particle diameter.
The method for testing the impurity content I of the solid waste broken granular regenerated aggregate by the step of testing the performance of various solid waste broken granular regenerated aggregates comprises the following steps: respectively taking two test impurity contents I from each group of regenerated aggregates, manually selecting impurities in each solid waste broken granular regenerated aggregate by adopting an visual inspection picking and identifying method, wherein the impurity contents are
Wherein m isz1M is impurity contentzoIs the initial content. Since the smaller the impurity content is, the better the rule is followed, the larger the model element is, the better the rule is, the
As an index for evaluating road-use performance.
The method for testing the bearing ratio CBR of the solid waste broken granular regenerated aggregate specifically comprises the following steps: compacting each group of solid waste broken granular regenerated aggregates according to heavy compaction II-2 category, and solving the maximum dry density and the optimal water content of each group of solid waste broken granular regenerated aggregates;
preparing three dry density test pieces according to the optimal water content for each group of solid waste broken granular regenerated aggregates, wherein the ranges of the dry densities rho d of the three dry density test pieces are rho d less than 95%, rho d more than or equal to 100% in 95% and rho d equal to 100%, each dry density test piece is compacted in three layers, the compaction number of each layer is respectively 30 times, 50 times and 98 times,
the ratio of unit pressure to standard pressure when the penetration amount is 2.5mm is used as the bearing ratio of the solid waste broken granular particles regenerated aggregate,
where p is the unit pressure.
And (4) taking the average value of the load ratios CBR measured by the test pieces with different dry densities.
Modulus of resilience E of solid waste broken granular regenerated aggregate0The test method is a loading plate method, a jack is used for loading, prepressing is carried out to 0.05MPa, and the test is stabilized for 1min, so that the loading plate is in close contact with the test sample, then the jack is released for unloading, and a pointer is zeroed or initial reading is recorded. Measuring a pressure-deformation curve, loading by using a jack, adopting a step-by-step loading and unloading method, controlling the loading amount by using a pressure or force measuring ring, stabilizing for 1min after loading to a preset load each time, immediately recording the numerical values of two deflection instruments dial indicators, releasing the jack to unload to 0, and reading again after unloading is stabilized for 1 min. When the difference between the readings of the two deflection meters is less than 30%, taking the average value, if the average value exceeds 30%, re-measuring, wherein the formula is
Wherein D is the rigid bearing specific diameter and is specified to be 30 cm; u. of0Is the poisson ratio; sigma PiThe total unit pressure of each level of load with the rebound deformation smaller than 1 mm; sigma LiThe total rebound deformation of which is less than 1mm under the unit pressure action of each level of load.
Further, referring to fig. 2, the step S401 of "evaluating the performance of each solid waste crushed granular aggregate for regenerating the aggregate pavement according to the performance test result" is specifically:
s411, for m solid waste broken granular regenerated aggregates and n performances, constructing an evaluation index matrix of each gradation of solid waste broken granular regenerated aggregates; for m recycled aggregates, n performances, an evaluation index matrix R ═ (C) is constructedij)m×n，
Wherein, CijRepresents the jth performance of the ith reclaimed aggregate, i is 1, …, m; j is 1, …, n.
S412, standardizing the evaluation index matrix to obtain a standard matrix, and constructing an optimal matter element; solving the association degree of the standard matrix and the optimal gray elements to obtain an association matrix; constructing the matrix R ═ (C)ij)m×nIs (B)ij)m×n，
Wherein the content of the first and second substances,
solving the association degree of the standard matrix and the optimal gray elements to obtain an association degree matrix:
wherein
ΔijRepresents the absolute value, Δ, of the difference between the characteristic of element j and the optimal gray element iij＝|C0j-CijL, |; a is a model coefficient.
S413, constructing an analysis model by using an analytic hierarchy process, wherein the analysis model comprises a target layer, a criterion layer and an index layer; determining the weight coefficient of each index to obtain a judgment matrix; specifically, a three-level evaluation system is constructed according to an analytic hierarchy process, the three-level evaluation system comprises a target layer, a criterion layer and a judgment layer, wherein the target layer refers to the judgment of final decision, the criterion layer refers to the requirements of roads with different grades,the system is divided into an expressway, a first-level highway and the like, and the index layer refers to performance indexes; according to the standard of the standard layer, performing weight analysis on the index layer and assigning ω, ω being 1, …, 10; obtaining a judgment matrix
S414, solving the maximum eigenvalue according to the judgment matrix, and measuring the consistency of the judgment matrix by adopting a consistency index; determining an evaluation index weight matrix according to element comparison of the index layer relative to the criterion layer and comparison of the criterion layer relative to the target layer; specifically, the maximum eigenvalue lambda is solved according to an analytic hierarchy process operation methodmaxA consistency index CI, a random consistency index RI and a check coefficient CR, wherein
When CR is less than 1, judging the matrix to pass consistency test to obtain a weight matrix omega, omega-omega1ω2ω3ω4]。
S415, determining the relevance between the solid waste broken granular regenerated aggregate of each gradation and the optimal ash element according to the relevance matrix and each weight coefficient; and evaluating the pavement performance of the prepared solid waste broken granular particles at all levels according to the degree of association between the regenerated aggregate of the prepared solid waste broken granular particles at all levels and the optimal ash element. Wherein the association degree of the solid waste broken granular regenerated aggregate of each grade and the optimal ash element is RDL，
The method for evaluating the road performance of the solid waste broken granular particles can perfectly and reasonably evaluate the road performance of the solid waste broken granular particles, and provides a measurement standard for the secondary utilization of the solid waste broken granular particles in the field of road engineering so as to realize the saving of building resources and the green sustainable development.
The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings, or any other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A method for evaluating the performance of a solid waste broken granular body road is characterized by comprising the following steps:
screening and grading test are carried out on the solid waste crushed granular bodies;
configuring m solid waste broken granular regenerated aggregates with different grades according to the grading test result;
carrying out performance test on n performances of various solid waste broken granular regenerated aggregates;
and evaluating the performance of each solid waste broken granular particles for regenerating the aggregate road according to the performance test result.
2. The method of claim 1, wherein the step of testing the properties of the recycled aggregate of solid waste broken granular materials comprises: coefficient of non-uniformity cuCoefficient of curvature ccImpurity content I, bearing ratio CBR, modulus of resilience E of solid waste broken granular particles regenerated aggregate0。
3. The method for evaluating the performance of the solid waste broken granular material road as claimed in claim 1, wherein the step of evaluating the performance of each solid waste broken granular material regenerated aggregate road according to the performance test result comprises the following steps:
for m solid waste broken granular regenerated aggregates and n performances, constructing an evaluation index matrix of the solid waste broken granular regenerated aggregates of each gradation;
standardizing the evaluation index matrix to obtain a standard matrix, and constructing an optimal matter element; solving the association degree of the standard matrix and the optimal gray elements to obtain an association matrix;
constructing an analysis model by using an analytic hierarchy process, wherein the analysis model comprises a target layer, a criterion layer and an index layer; determining the weight coefficient of each index to obtain a judgment matrix;
solving the maximum characteristic value according to the judgment matrix, and measuring the consistency of the judgment matrix by adopting a consistency index; determining an evaluation index weight matrix according to element comparison of the index layer relative to the criterion layer and comparison of the criterion layer relative to the target layer;
determining the correlation degree of the solid waste broken granular regenerated aggregate of each gradation and the optimal gray elements according to the correlation degree matrix and each weight coefficient; and evaluating the pavement performance of the prepared solid waste broken granular particles at all levels according to the degree of association between the regenerated aggregate of the prepared solid waste broken granular particles at all levels and the optimal ash element.
4. The method for evaluating the performance of the solid waste broken granular material road as claimed in claim 3, wherein the step of constructing the evaluation index matrix of the solid waste broken granular material regenerated aggregates of each gradation for n performances of m solid waste broken granular material regenerated aggregates comprises the steps of: for m recycled aggregates, n performances, an evaluation index matrix R ═ (C) is constructedij)m×n，
Wherein, CijRepresents the jth performance of the ith reclaimed aggregate, i is 1, …, m; j is 1, …, n.
5. The method for evaluating the performance of the solid waste crushed granular material road as claimed in claim 3, wherein the evaluation index matrix is standardized to obtain a standard matrix and construct an optimal material element; solving the association degree of the standard matrix and the optimal gray elements to obtain an association matrix comprises the following steps: constructing the matrix R ═ (C)ij)m×nIs (B)ij)m×n，
Wherein the content of the first and second substances,
solving the standard matrix and the best grayAnd (3) obtaining the relevance matrix of the element:
wherein
ΔijRepresents the absolute value, Δ, of the difference between the characteristic of element j and the optimal gray element iij＝|C0j-CijL, |; a is a model coefficient.
6. The method for evaluating the performance of the solid waste broken granular material road as claimed in claim 3, wherein the analytic model is constructed by using an analytic hierarchy process, and comprises a target layer, a criterion layer and an index layer; determining the weight coefficient of each index to obtain a judgment matrix; the method comprises the following steps: constructing a three-level evaluation system according to an analytic hierarchy process, wherein the three-level evaluation system comprises a target layer, a criterion layer and a judgment layer, the target layer is the judgment of final decision, the criterion layer is the requirement of roads with different grades and is divided into expressways, first-level roads and the like, and the index layer is a performance index; according to the standard of the standard layer, performing weight analysis on the index layer and assigning ω, ω being 1, …, 10; obtaining a judgment matrix
7. The method for evaluating the performance of the solid waste broken granular material road as claimed in claim 3, wherein the maximum eigenvalue is solved according to the judgment matrix, and the consistency of the matrix is measured by adopting a consistency index; determining an evaluation index weight matrix according to the element comparison of the index layer relative to the criterion layer and the comparison of the criterion layer relative to the target layer; the method comprises the following steps: solving the maximum eigenvalue lambda according to an analytic hierarchy processmaxA consistency index CI, a random consistency index RI and a check coefficient CR, wherein
When CR is less than 1, judging the matrix to pass consistency test to obtain a weight matrix omega, omega-omega1ω2ω3ω4]。
8. The method of claim 3, wherein the correlation between the graded solid waste broken granular material regenerated aggregate and the optimum gray element is determined according to the correlation matrix and the weighting coefficients; and evaluating the pavement performance of the prepared solid waste broken granular particles at all levels according to the degree of association between the regenerated aggregate of the prepared solid waste broken granular particles at all levels and the optimal ash element. In the step, the relevance degree of the solid waste broken granular regenerated aggregate of each grade and the optimal ash element is RDL，
9. The method for evaluating the performance of the solid waste broken granular material road as claimed in claim 2, wherein the step of testing the performance of the solid waste broken granular material regenerated aggregate comprises the following steps: the ratio of unit pressure to standard pressure when the penetration amount is 2.5mm is used as the bearing ratio of the solid waste broken granular particles regenerated aggregate,
where p is the unit pressure.
10. The method for evaluating the performance of the solid waste broken granular material road as claimed in claim 6, wherein the step of testing the load ratio CBR of the solid waste broken granular material regenerated aggregate further comprises the following steps:
compacting each group of solid waste broken granular regenerated aggregates according to heavy compaction II-2 category, and solving the maximum dry density and the optimal water content of each group of solid waste broken granular regenerated aggregates;
preparing three dry density test pieces according to the optimal water content for each group of solid waste broken granular regenerated aggregates, wherein the ranges of the dry densities rho d of the three dry density test pieces are rho d less than 95%, rho d more than or equal to 100% in 95% and rho d equal to 100%, each dry density test piece is compacted in three layers, the compaction number of each layer is respectively 30 times, 50 times and 98 times,
and (4) taking the average value of the load ratios CBR measured by the test pieces with different dry densities.
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