CN101624274A - Method for preparing asphalt pavement material by adopting waste concrete - Google Patents
Method for preparing asphalt pavement material by adopting waste concrete Download PDFInfo
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- CN101624274A CN101624274A CN200910063494A CN200910063494A CN101624274A CN 101624274 A CN101624274 A CN 101624274A CN 200910063494 A CN200910063494 A CN 200910063494A CN 200910063494 A CN200910063494 A CN 200910063494A CN 101624274 A CN101624274 A CN 101624274A
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Abstract
The invention relates to a method for preparing asphalt pavement material by adopting waste concrete. The method produces regenerative aggregate as asphalt pavement material by adopting waste concrete, and comprises the steps of waste concrete pretreatment, high temperature calcinating and grinding, cement mortar grinding and material mixing and stirring; regenerative coarse aggregate replaces natural aggregate with the proportion of 20 to 60 percent by weight, therefore combined aggregate with the temperature of 170 to 190 DEG C is obtained, asphalt at 145 to 165 DEG C is added and then stirred with cement mortar powder, and then the asphalt pavement material is obtained, and the contents of the combined aggregate, the asphalt and the cement mortar powder are 96 to 91 percent, 3 to 5 percent and 1 to 4 percent respectively. The method has the advantages that the waste concrete can be effectively utilized, the coarse aggregate can be recycled, the cement mortar powder can also be recycled, the mixture with the strength and the durability meeting pavement requirements is obtained, and great promotion effect can be produced for the resource recycling, the natural environment protection and the ecological equilibrium.
Description
Technical field
The invention belongs to building material field, particularly relate to a kind of method of utilizing discarded concrete to prepare asphalt pavement material.
Background technology
The building castoff that China Reconstructs's construction is at present produced the chances are annual 100000000 tons, old building demolition is annual above 500,000,000 tons.Reconstruction of the old city town, Xincheng District is built, and frequent finishing all can produce a large amount of building castoffs, these building castoffs comprise waste material, various wrapping material and other wastes etc. that the mortar that is scattered in waste concrete piece, the construction process and concrete, brickbat slag, metal, bamboo timber, decorations produce, wherein concrete and mortar proportion maximum account for 30%～50% of total amount.To discarded concrete and mortar rationally reclaim, regeneration, help sustainable development of resource, also help protecting environment.Some developed country's building castoff utilization ratios are generally 80%～100%, and China's building castoff recycling rate less than 5%, a large amount of building castoffs are taken as the building waste landfill disposal and fall, and cause the significant wastage of resource.Along with highway in China build flourish, corresponding pavement construction material demand is big, the many regional sand and stone resources of China are shortage day by day, particularly for a long time, because the unordered exploitation of Mineral resources, feasible day by day deficient such as material of construction commonly used such as fat lime stone, river sand, some areas have been difficult to seek fine sandstone material.
If can be with after discarded concrete fragmentation, processing, the processing; be applied in the Road construction as asphalt pavement material; not only can solve the difficult problem of depositing of discarded concrete; minimizing is to the erosion of valuable land resources; can also save a large amount of road-making materials; minimizing is protected fragile ecology day by day to a large amount of exploitations of non-renewable Mineral resources.
Sand in the concrete, stone relative inertness have kept original character substantially, and adherent sand-cement slurry contains a large amount of hydrated cementitious products.Discarded concrete processing on the basis of letter sorting, fragmentation, screening is obtained regeneration aggregate,, will produce active influence environment protection and social Sustainable development the breeze of the levigate alternative production asphalt of separating of hardened cement mortar.
Summary of the invention
Technical problem to be solved by this invention is: a kind of method of utilizing discarded concrete and sand-cement slurry to prepare asphalt pavement material is provided.This method is to utilize the glued discarded concrete of pitch, make discarded concrete be applied to pitch stabilized macadam base or bituminous pavements such as Class II highway, Class I highway and motorway in, surface layer down.
The present invention solves its technical problem and adopts following technical scheme:
The method of utilizing discarded concrete to prepare asphalt pavement material provided by the invention, realize by following step:
(1) discarded concrete pre-treatment: discarded concrete is removed impurity through letter sorting, and fragmentation obtains regenerated coarse aggregate and isolating hardened cement mortar then; The impurity of removing comprises reinforcing bar, timber and glass.
After letter sorting being removed the one-level fragmentation of waste concrete process crusher and two-stage crushing of impurity, obtain satisfactory No. 1 coarse aggregate, particle diameter is 19～31.5mm; No. 2 coarse aggregates, particle diameter are 13.2～19mm; No. 3 coarse aggregates, particle diameter are 4.75～13.2mm.
(2) high-temperature calcination is ground: regenerated coarse aggregate is warmed to 400～600 ℃, and the relatively poor part of hardened cement mortar bonding that is wrapped in the regenerated coarse aggregate surface is come off.When the diameter of regenerated coarse aggregate block during at 10～30mm, the calcining test specimen is 40～60 minutes.
(3) sand-cement slurry grinding: powder is dried and ground to form to the hardened cement mortar that obtains.Sand-cement slurry was 105 ℃ of oven dry of temperature 3～4 hours, and cool to room temperature is ground to particle diameter less than 0.3mm, and specific surface area is not more than 140m
2/ kg.
(4) compound mixes and stirs: by weight, regenerated coarse aggregate is substituted natural aggregate with 20～60% ratios, and to obtain temperature be 170～190 ℃ combined aggregate, the adding temperature is 145～165 ℃ a pitch, mixes and stirs with the sand-cement slurry powder then, obtains described asphalt pavement material.By weight, each is formed content and is: combined aggregate 95～91%, pitch 4～5%; Sand-cement slurry powder 1～4%.
The volume of sand-cement slurry powder is decided according to the size of the final percent of pass of 0.075mm sieve aperture of 0～2.36 grade of material, and the synthetic percent of pass behind the adding sand-cement slurry powder satisfies related request among " asphalt highway construction technique normalizing " (JTG F40-2004).
Described pitch should be heated to 145～155 ℃ when being No. 70, ordinary road petroleum pitch, and described pitch should be heated to 155～165 ℃ during for modifying asphalt.
Described modifying asphalt can adopt homemade or import SBS or SBR modifying asphalt.
Above-mentioned asphalt pavement material provided by the invention, it is used for the pitch stabilized macadam base, be layered on I and II highway and asphalt pavement of highway basic unit or in following surface layer.
The advantage that the present invention compared with prior art has mainly is: the utilization ratio of discarded concrete is greatly enhanced; not only can recycle coarse aggregate; also can recycle the sand-cement slurry powder; obtain intensity and weather resistance and satisfy the road, will produce huge promoter action resource circulation regeneration, conservation of nature environment and the eubiosis with the compound that requires.
Description of drawings
Fig. 1 is the pavement structure synoptic diagram.
Fig. 2 is preparation recycled aggregate of waste concrete asphalt schema.
Embodiment
The method of utilizing discarded concrete to prepare asphalt pavement material provided by the invention, its technical process as shown in Figure 2.By the asphalt pavement material of this method preparation, its be layered on I and II highway and asphalt pavement of highway basic unit or in surface layer down.
The invention will be further described below in conjunction with embodiment, but do not limit the present invention.
Embodiment 1: AC-25 is an example with configuration dense-graded asphalt concrete compound.
Pitch: the bi tumenf orr oad 70# that adopts Ezhou, Hubei Ke Shi bituminous material company limited to provide, its specification of quality meets " asphalt highway construction technique normalizing " (JTG F40-2004);
Aggregate: natural aggregate is taken from the broken gained rubble of limestone, regeneration aggregate water intaking cement concrete road is overhauled the discarded concrete of generation, 42.5 grades of Portland cements of former use cement, cement concrete mark is C30, behind fragmentation of crusher one-level and two-stage crushing, obtain satisfactory regeneration aggregate 1#, 2# and 3#, the stepping particle diameter of natural aggregate and regeneration aggregate is consistent;
Filler: adopt the levigated cement mortar powder, the environment at 105 ℃ before using was dried 3～4 hours;
The preparation technology of recycled aggregate of waste concrete asphalt is as follows:
Partly substitute natural aggregate with regeneration aggregate, alternative percentage is respectively 20%, 40% and 60%, adopt one group of proportioning of not mixing any regeneration aggregate in contrast, also promptly substituting percentage is 0%, and the final percent of pass of combined aggregate satisfies the requirement of " asphalt highway construction technique normalizing " (JTG F40-2004).Combined aggregate is heated to 180 ℃, pitch is heated to 150 ℃, cement mortar powder consumption 2%, uniform mixing in whipping device, condition compacted under marshal piece at best asphalt content, soak Marshall Test, freeze thawing cleavage strength than test and wheel tracking test, its test-results is respectively as table 1,2 and 3.As can be seen from the table, along with the increase of regeneration aggregate volume, the best asphalt content of recycled aggregate of waste concrete is also increasing; Mixing of discarded aggregate can be reduced the mechanical property of marshal piece and the ability of anti-water damage simultaneously, and the reduction amplitude is different and different according to the volume of regeneration aggregate, but the ability of opposing high temperature rut is made moderate progress.Its Marshall stability test when the incorporation of regeneration aggregate reaches 40%, freeze thawing split test and wheel tracking test all can be in the scopes that standard allows, but when volume reaches 60%, although improved asphalt content, above-mentioned every index can not satisfy code requirement.
Embodiment 2: AC-20 is an example with configuration dense-graded asphalt concrete compound.
Pitch: the SBS modifying asphalt that adopts Ezhou, Hubei Ke Shi bituminous material company limited to provide, its specification of quality meets " asphalt highway construction technique normalizing " (JTG F40-2004);
Aggregate: natural aggregate is taken from the broken gained rubble of limestone, regeneration aggregate water intaking cement concrete road is overhauled the discarded concrete of generation, 42.5 grades of Portland cements of former use cement, cement concrete mark is C30, behind fragmentation of crusher one-level and two-stage crushing, obtain satisfactory regeneration aggregate 2# and 3#, the stepping particle diameter of natural aggregate and regeneration aggregate is consistent;
Filler: adopt the levigated cement mortar powder, the environment at 105 ℃ before using was dried 3～4 hours;
The preparation technology of recycled aggregate of waste concrete asphalt is as follows:
Partly substitute natural aggregate with regeneration aggregate, alternative percentage is respectively 30% and 50%, adopt one group of proportioning of not mixing any regeneration aggregate in contrast, also promptly substituting percentage is 0%, and the final percent of pass of regeneration aggregate satisfies the related request that meets " asphalt highway construction technique normalizing " (JTG F40-2004).Combined aggregate is heated to 180 ℃, pitch is heated to 160 ℃, cement mortar powder consumption 3%, uniform mixing in whipping device, condition compacted under marshal piece at best asphalt content, soak Marshall Test, freeze thawing cleavage strength than test and wheel tracking test, its test-results is respectively as table 4, and 5 and 6.As can be seen from the table, along with the increase of regeneration aggregate volume, the best asphalt content of cement concrete regeneration aggregate is also increasing; Mixing of discarded aggregate can be reduced the mechanical property of marshal piece and the ability of anti-water damage simultaneously, the reduction amplitude is different and different according to the volume of regeneration aggregate, and the recycled aggregate of waste concrete asphalt of 30% volume has the ability of resisting the high temperature rut preferably.Its Marshall stability test when the incorporation of regeneration aggregate reaches 50%, freeze thawing split test and wheel tracking test all can be in the scopes that standard allows.
Embodiment 3: ATB-25 is an example with configuration pitch stabilized macadam base.
Pitch: the bi tumenf orr oad 70# that adopts Ezhou, Hubei Ke Shi bituminous material company limited to provide, its specification of quality meets " asphalt highway construction technique normalizing " (JTG F40-2004);
Aggregate: natural aggregate is taken from the broken gained rubble of limestone, regeneration aggregate water intaking cement concrete road is overhauled the discarded concrete of generation, 42.5 grades of Portland cements of former use cement, cement concrete mark is C30, behind fragmentation of crusher one-level and two-stage crushing, obtain satisfactory regeneration aggregate 1#, 2# and 3#, the stepping particle diameter of natural aggregate and regeneration aggregate is consistent;
Filler: adopt the levigated cement mortar powder, the environment at 105 ℃ before using was dried 3～4 hours;
The preparation technology of recycled aggregate of waste concrete asphalt is as follows:
Partly substitute natural aggregate with regeneration aggregate, substitute percentage difference 30% and 50%, adopt one group of proportioning of not mixing any regeneration aggregate in contrast, also promptly substituting percentage is 0%, and the final percent of pass of combined aggregate satisfies the related request of " asphalt highway construction technique normalizing " (JTG F40-2004).Combined aggregate is heated to 180 ℃, pitch is heated to 150 ℃, cement mortar powder consumption 1%, uniform mixing in whipping device, condition compacted under marshal piece at best asphalt content, soak Marshall Test, freeze thawing cleavage strength than test and wheel tracking test, its test-results is respectively as table 7,8 and 9.As can be seen from the table, increase along with the regeneration aggregate volume, the best asphalt content of recycled aggregate of waste concrete is also increasing, mixing of discarded aggregate can be reduced the mechanical property of marshal piece and the ability of anti-water damage simultaneously, the reduction amplitude is different and different according to the volume of regeneration aggregate, and the ability of resisting the high temperature rut is made moderate progress.When the incorporation of regeneration aggregate reached 50%, the freeze thawing cleavage strength was than still satisfying code requirement.
Subordinate list
Table 1 immersion Marshall Test result
| The asphalt type | Asphalt content (%) | Maximum theory density Gmm (g/cm 3) | Test specimen density Gmb (two-sided 75 times, g/cm 3) | Voidage (%) | Marshall stability (KN) | Immersion Marshall stability (KN) | Residual stability is than (%) |
| ??0％ | ??4.0 | ??2.603 | ?2.476 | ??4.9 | ??11.8 | ??10.9 | ??92.4 |
| ??20％ | ??4.1 | ??2.567 | ?2.443 | ??4.8 | ??10.3 | ??9 | ??87.4 |
| ??40％ | ??4.3 | ??2.531 | ?2.404 | ??5.0 | ??8.7 | ??7.5 | ??86.2 |
| ??60％ | ??4.6 | ??2.498 | ?2.367 | ??5.2 | ??6.8 | ??5.7 | ??83.8 |
| Technical requirements | ??- | ??- | ?- | ??4～7 | ??＞8 | ??- | ??＞80 |
Table 2 freeze thawing cleavage strength is than the test result
| The asphalt type | Asphalt content (%) | Maximum theory density Gmm (g/cm 3) | Test specimen density Gmb (two-sided 50 times, g/cm 3) | Voidage (%) | Non-freeze thawing cleavage strength (25 ℃, MPa) | The freeze thawing cleavage strength (25 ℃, MPa) | Cleavage strength is than (%) |
| ??0％ | ??4 | ??2.603 | ??2.44 | ??6.3 | ??1.27 | ??1.13 | ??89.5 |
| ??20％ | ??4.1 | ??2.567 | ??2.407 | ??6.2 | ??1.17 | ??0.98 | ??83.7 |
| ??40％ | ??4.3 | ??2.531 | ??2.361 | ??6.7 | ??0.96 | ??0.76 | ??79.3 |
| ??60％ | ??4.6 | ??2.498 | ??2.318 | ??7.2 | ??0.79 | ??0.56 | ??71.6 |
| Technical requirements | ??- | ??- | ??- | ??6～ ??8 | ??- | ??- | ??＞80 |
Table 3 wheel tracking test result
Annotate: 60 ℃ of test temperatures, tire pressure 0.7MPa
Table 4 immersion Marshall Test result
| The asphalt type | Asphalt content (%) | Maximum theory density Gmm (g/cm 3) | Test specimen density Gmb (two-sided 75 times, g/cm 3) | Voidage (%) | Marshall stability (KN) | Immersion Marshall stability (KN) | Residual stability is than (%) |
| ??0％ | ??4.4 | ??2.567 | ?2.437 | ??5.1 | ??13.5 | ??12.9 | ??95.6 |
| ??30％ | ??4.6 | ??2.545 | ?2.413 | ??5.2 | ??12.4 | ??11.2 | ??90.3 |
| ??50％ | ??4.9 | ??2.521 | ?2.388 | ??5.3 | ??11.6 | ??10.6 | ??91.4 |
| Technical requirements | ??- | ??- | ?- | ??4～7 | ??＞8 | ??- | ??＞80 |
Table 5 freeze thawing cleavage strength is than the test result
| The asphalt type | Asphalt content (%) | Maximum theory density Gmm (g/cm 3) | Test specimen density Gmb (two-sided 50 times, g/cm 3) | Voidage (%) | Non-freeze thawing cleavage strength (25 ℃, MPa) | The freeze thawing cleavage strength (25 ℃, MPa) | Cleavage strength is than (%) |
| ??0％ | ??4.4 | ??2.567 | ??2.404 | ??6.3 | ??12.6 | ??10.9 | ??86.5 |
| ??30％ | ??4.6 | ??2.545 | ??2.383 | ??6.4 | ??11.8 | ??9.8 | ??83.1 |
| ??50％ | ??4.9 | ??2.521 | ??2.367 | ??6.1 | ??10.1 | ??8.2 | ??81.2 |
| Technical requirements | ??- | ??- | ??- | ??6～8 | ??- | ??- | ??＞80 |
Table 6 wheel tracking test result
Annotate: 60 ℃ of test temperatures, tire pressure 0.7MPa.
Table 7 immersion Marshall Test result
| The asphalt type | Pitch is used (%) | Maximum theory density Gmm (g/cm 3) | Test specimen density Gmb (two-sided 75 times, g/cm 3) | Voidage (%) | Marshall stability (KN) | Immersion Marshall stability (KN) | Residual stability is than (%) |
| ??0％ | ??3.5 | ??2.537 | ?2.412 | ??4.9 | ??10.8 | ??9.5 | ??88.0 |
| ??30％ | ??3.7 | ??2.501 | ?2.368 | ??5.3 | ??9.6 | ??8.2 | ??85.4 |
| ??50％ | ??3.9 | ??2.477 | ?2.352 | ??5.0 | ??8.4 | ??6.9 | ??82.1 |
| Technical requirements | ??- | ??- | ?- | ??4～7 | ??＞8 | ??- | ??＞80 |
Table 8 freeze thawing cleavage strength is than the test result
| The asphalt type | Asphalt content (%) | Maximum theory density Gmm (g/cm 3) | Test specimen density Gmb (two-sided 50 times, g/cm 3) | Voidage (%) | Non-freeze thawing cleavage strength (25 ℃, MPa) | The freeze thawing cleavage strength (25 ℃, MPa) | Cleavage strength is than (%) |
| ??0％ | ??3.5 | ??2.537 | ??2.382 | ??6.1 | ??11.2 | ??9.4 | ??83.9 |
| ??30％ | ??3.7 | ??2.501 | ??2.341 | ??6.4 | ??9.1 | ??7.4 | ??81.3 |
| ??50％ | ??3.9 | ??2.477 | ??2.314 | ??6.6 | ??7.8 | ??5.7 | ??73.1 |
| Technical requirements | ??- | ??- | ??- | ??6～8 | ??- | ??- | ??＞80 |
Table 9 wheel tracking test result
Annotate: 60 ℃ of test temperatures, tire pressure 0.7MPa.
Claims (9)
1. method of utilizing discarded concrete to prepare asphalt pavement material is characterized in that utilizing discarded concrete to produce regeneration aggregate and realizes by following step as the method for asphalt pavement material:
(1) discarded concrete pre-treatment: discarded concrete is removed impurity through letter sorting, and fragmentation obtains regenerated coarse aggregate and isolating hardened cement mortar then;
(2) high-temperature calcination is ground: regenerated coarse aggregate is warmed to 400～600 ℃, and the relatively poor part of hardened cement mortar bonding that is wrapped in the regeneration aggregate surface is come off;
(3) sand-cement slurry grinding: powder is dried and ground to form to the hardened cement mortar that obtains;
(4) compound mixes and stirs: by weight, regenerated coarse aggregate is substituted natural aggregate with 20～60% ratios, and to obtain temperature be 170～190 ℃ combined aggregate, adds temperature and be 145～165 ℃ pitch, mixes and stirs with the sand-cement slurry powder then, obtain described asphalt pavement material
By weight, each is formed content and is: combined aggregate 96～91%, pitch 3～5%; Sand-cement slurry powder 1～4%.
2. method according to claim 1 is characterized in that the impurity of removing comprises reinforcing bar, timber and glass.
3. method according to claim 1 is characterized in that obtaining satisfactory No. 1 coarse aggregate with after sorting the one-level fragmentation of waste concrete process crusher and two-stage crushing of removing impurity, and particle diameter is 19～31.5mm; No. 2 coarse aggregates, particle diameter are 13.2～19mm; No. 3 coarse aggregates, particle diameter are 4.75～13.2mm.
4. method according to claim 1 is characterized in that in the step (2), and when block diameter during at 10～30mm, the calcining test specimen is 40～60 minutes.
5. method according to claim 1 is characterized in that in the step (3), and sand-cement slurry was 105 ℃ of oven dry of temperature 3～4 hours, and cool to room temperature is ground to particle diameter less than 0.3mm, and specific surface area is not more than 140m
2/ kg.
6. method according to claim 1 is characterized in that in the step (4), and described pitch should be heated to 145～155 ℃ when being No. 70, ordinary road petroleum pitch, and described pitch should be heated to 155～165 ℃ during for modifying asphalt.
7. method according to claim 6 is characterized in that modifying asphalt adopts homemade or import SBS or SBR modifying asphalt.
8. method according to claim 1, it is characterized in that in the step (4), the volume of sand-cement slurry powder is decided according to the size of the final percent of pass of 0.075mm sieve aperture of 0～2.36mm shelves material, and the synthetic percent of pass behind the adding sand-cement slurry powder satisfies related request among " asphalt highway construction technique normalizing " (JTG F40-2004).
9. purposes according to the asphalt pavement material of the described method of arbitrary claim in the claim 1 to 8 preparation, it is characterized in that this material is used for the pitch stabilized macadam base, be layered on I and II highway and asphalt pavement of highway basic unit or in following surface layer.
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102863169A (en) * | 2012-10-24 | 2013-01-09 | 陕西元方实业有限公司 | Recycling method for waste concrete pavements |
| CN103043951A (en) * | 2013-01-15 | 2013-04-17 | 江苏省交通科学研究院股份有限公司 | Hot mix regenerated fine aggregate asphalt concrete |
| CN103420643A (en) * | 2013-08-08 | 2013-12-04 | 北京工业大学 | Method for preparing asphalt concrete with recycled aggregate and application of asphalt concrete in asphalt pavement |
| CN105776929A (en) * | 2016-04-18 | 2016-07-20 | 方耀 | Waste concrete recycling method |
| CN105801011A (en) * | 2016-04-05 | 2016-07-27 | 武汉理工大学 | Hot-recycling asphalt mixture containing non-traditional oil and preparation method of hot-recycling asphalt mixture |
| CN106242400A (en) * | 2016-08-03 | 2016-12-21 | 韦振兴 | A kind of method utilizing aggregate to prepare new material |
| CN106946501A (en) * | 2017-03-22 | 2017-07-14 | 泰州职业技术学院 | Concrete debris regenerated aggregate Warm-Mix Bitumen Mixture and preparation method thereof |
| CN107445575A (en) * | 2017-09-12 | 2017-12-08 | 成都新柯力化工科技有限公司 | A kind of method that the special aggregate of pavement asphalt is prepared using building waste, waste or used plastics |
| CN110981287A (en) * | 2019-12-25 | 2020-04-10 | 江苏中新苏通市政工程有限公司 | High-binding-property recycled asphalt concrete and preparation process thereof |
| CN111822080A (en) * | 2020-07-16 | 2020-10-27 | 卫凤仪 | Processing method of high-strength environment-friendly concrete |
| CN113117862A (en) * | 2021-04-12 | 2021-07-16 | 浙江大学 | Method for quickly removing mortar attached to coarse aggregate of recycled concrete |
| CN113307547A (en) * | 2021-06-09 | 2021-08-27 | 上海繁荣道路建设工程有限公司 | Environment-friendly asphalt mixture and preparation method thereof |
| CN113788641A (en) * | 2021-09-18 | 2021-12-14 | 武汉工程大学 | Water-loss-resistant recycled aggregate asphalt concrete and preparation method thereof |
| CN114560658A (en) * | 2022-03-11 | 2022-05-31 | 西安市政道桥建设集团有限公司 | Novel cement-stabilized construction waste material |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102863169B (en) * | 2012-10-24 | 2013-10-16 | 陕西元方实业有限公司 | Recycling method for waste concrete pavements |
| CN102863169A (en) * | 2012-10-24 | 2013-01-09 | 陕西元方实业有限公司 | Recycling method for waste concrete pavements |
| CN103043951A (en) * | 2013-01-15 | 2013-04-17 | 江苏省交通科学研究院股份有限公司 | Hot mix regenerated fine aggregate asphalt concrete |
| CN103420643A (en) * | 2013-08-08 | 2013-12-04 | 北京工业大学 | Method for preparing asphalt concrete with recycled aggregate and application of asphalt concrete in asphalt pavement |
| CN105801011A (en) * | 2016-04-05 | 2016-07-27 | 武汉理工大学 | Hot-recycling asphalt mixture containing non-traditional oil and preparation method of hot-recycling asphalt mixture |
| CN105801011B (en) * | 2016-04-05 | 2018-06-26 | 武汉理工大学 | A kind of non-traditional grease heat regeneration asphalt mixture and preparation method thereof |
| CN105776929A (en) * | 2016-04-18 | 2016-07-20 | 方耀 | Waste concrete recycling method |
| CN106242400B (en) * | 2016-08-03 | 2019-10-18 | 韦振兴 | A method of material is prepared using aggregate |
| CN106242400A (en) * | 2016-08-03 | 2016-12-21 | 韦振兴 | A kind of method utilizing aggregate to prepare new material |
| CN106946501A (en) * | 2017-03-22 | 2017-07-14 | 泰州职业技术学院 | Concrete debris regenerated aggregate Warm-Mix Bitumen Mixture and preparation method thereof |
| CN106946501B (en) * | 2017-03-22 | 2019-07-19 | 泰州职业技术学院 | Concrete debris regenerated aggregate Warm-Mix Bitumen Mixture and preparation method thereof |
| CN107445575A (en) * | 2017-09-12 | 2017-12-08 | 成都新柯力化工科技有限公司 | A kind of method that the special aggregate of pavement asphalt is prepared using building waste, waste or used plastics |
| CN110981287A (en) * | 2019-12-25 | 2020-04-10 | 江苏中新苏通市政工程有限公司 | High-binding-property recycled asphalt concrete and preparation process thereof |
| CN111822080A (en) * | 2020-07-16 | 2020-10-27 | 卫凤仪 | Processing method of high-strength environment-friendly concrete |
| CN113117862A (en) * | 2021-04-12 | 2021-07-16 | 浙江大学 | Method for quickly removing mortar attached to coarse aggregate of recycled concrete |
| CN113307547A (en) * | 2021-06-09 | 2021-08-27 | 上海繁荣道路建设工程有限公司 | Environment-friendly asphalt mixture and preparation method thereof |
| CN113788641A (en) * | 2021-09-18 | 2021-12-14 | 武汉工程大学 | Water-loss-resistant recycled aggregate asphalt concrete and preparation method thereof |
| CN114560658A (en) * | 2022-03-11 | 2022-05-31 | 西安市政道桥建设集团有限公司 | Novel cement-stabilized construction waste material |
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