CN104211324A - Secondary tackifying method for preparing cast asphalt concrete - Google Patents
Secondary tackifying method for preparing cast asphalt concrete Download PDFInfo
- Publication number
- CN104211324A CN104211324A CN201310220347.2A CN201310220347A CN104211324A CN 104211324 A CN104211324 A CN 104211324A CN 201310220347 A CN201310220347 A CN 201310220347A CN 104211324 A CN104211324 A CN 104211324A
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- Prior art keywords
- asphalt concrete
- type
- cast
- tackifier
- asphalt
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000011384 asphalt concrete Substances 0.000 title claims abstract description 23
- 239000000203 mixture Substances 0.000 claims abstract description 22
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 19
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 15
- 239000011707 mineral Substances 0.000 claims abstract description 15
- 239000011159 matrix material Substances 0.000 claims abstract description 7
- -1 amine compounds Chemical class 0.000 claims abstract description 6
- 239000006185 dispersion Substances 0.000 claims description 8
- 150000001875 compounds Chemical class 0.000 claims description 7
- 239000004567 concrete Substances 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 2
- 239000005864 Sulphur Substances 0.000 claims description 2
- OUUQCZGPVNCOIJ-UHFFFAOYSA-M Superoxide Chemical compound [O-][O] OUUQCZGPVNCOIJ-UHFFFAOYSA-M 0.000 claims description 2
- 229910044991 metal oxide Inorganic materials 0.000 claims description 2
- 150000004706 metal oxides Chemical class 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- 230000008961 swelling Effects 0.000 claims description 2
- 239000010426 asphalt Substances 0.000 abstract description 19
- 238000005266 casting Methods 0.000 abstract description 7
- 239000003607 modifier Substances 0.000 abstract 3
- 239000002270 dispersing agent Substances 0.000 abstract 2
- 239000000084 colloidal system Substances 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 229920000642 polymer Polymers 0.000 abstract 1
- 238000010008 shearing Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000035515 penetration Effects 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 229920002521 macromolecule Polymers 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000003867 organic ammonium compounds Chemical class 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Road Paving Structures (AREA)
Abstract
The invention relates to a secondary tackifying method for preparing cast asphalt concrete; heating the matrix asphalt to 170-200 ℃; adding an active tackifier, a dispersing agent, a modifier and naphthenic oil, and starting a colloid mill for circular shearing after the modifier is fully swelled in the asphalt to obtain the casting type special modified asphalt; adding an active tackifier and a high-quality graded mineral aggregate at 220-240 ℃, and fully and uniformly mixing to prepare secondary tackified cast asphalt concrete; the active tackifier is formed by mixing one or more vulcanizing agents, the dispersant is formed by mixing one or more organic amine compounds, and the modifier is formed by mixing one or more SBS polymers; the method adjusts the adding amount of the active tackifier at the mixing stage of the asphalt mixture so that the mineral aggregate and the modified asphalt form good adhesion, improves the mechanical property of the cast asphalt concrete, meets the technical indexes of the cast asphalt concrete, and has simple operation, convenience and feasibility.
Description
Technical field:
The present invention relates to a kind of road bitumen concrete tackify method, this technique is particularly suitable for cast asphalt concrete, can enhancing modified pitch and the adhesive power of mineral aggregate, significantly improve concrete over-all properties.
Background technology:
Traditional cast asphalt concrete production technique is that the materials such as mineral aggregate of bituminous cements, certain grating are made to casting type asphaltic mixture in asphalt mixture mixing building by a certain percentage.This mode is to bituminous cements, and building stones and grating have extremely strict requirement, and any material changes, and all will cause flowing property of compound, pile penetration or pile penetration increment not to meet technical indicator.This does not possess good adaptability to domestic a large amount of steel bridges construction.When compound raw material changes, must redesign mineral aggregate gradation in addition, increase workload, the problems such as waste of manpower, financial resources.
In order to solve traditional cast asphalt concrete the problems referred to above, generally adopt high-viscosity asphalt to solve these problems.But, the inconvenience that too high asphalt viscosity can bring modifying asphalt to produce.
Summary of the invention:
The object of this invention is to provide a kind of casting type asphaltic mixture secondary tackify method, first macromolecule modified dispersion of materials is played in pitch to a tackify (being to produce modifying asphalt), its viscosity controller is in rational production range, then when mixing casting type asphaltic mixture, add the active tackifier of part, play the effect to the tackify again of casting type asphaltic mixture, make pitch, macromolecule modified material, mineral aggregate can be good at combination, with this, meet the technical indicator of cast asphalt concrete.This technique can adapt to the variation of mixture material under different situations, after avoiding changing because of compound building stones, breeze, modifying asphalt of the same race does not meet the drawback of cast asphalt concrete requirement, and equipment for processing modified asphaltum is not done to particular requirement, the modified asphalt device of most factory process is all suitable for.
Casting type asphaltic mixture secondary tackify method of the present invention: first by the first step tackify, prepare the dedicated modified pitch of stable cast-type, its compositions in weight percentage is active tackifier 0.1～0.5%, dispersion agent 0.1～0.5%, properties-correcting agent 6～14%, naphthenic oil 0.5～10%, all the other are matrix pitch; Then by second step tackify, make casting type asphaltic mixture, its compositions in weight percentage is active tackifier 0.01～0.1%, the dedicated modified pitch 6～9% of cast-type, high-quality grating mineral aggregate 70～96%, the dedicated modified pitch of this stable cast-type further reacts, promote asphalt over-all properties, make it reach following index:
A: mobility (240 ℃)≤40s
B:60 ℃ of pile penetration :≤4mm, pile penetration increment≤0.4mm
C:-10 ℃ curved draws ultimate strain: >8 * 10
-3
One or more that above-mentioned active tackifier are vulcanizing agents mix, as: sulphur, sulfocompound, superoxide, metal oxide etc.;
Above-mentioned dispersion agent is that one or more of organic ammonium compounds mix, as: sulphenamide compounds, aldehyde amines compound etc.;
Above-mentioned properties-correcting agent is SBS polymkeric substance, by one or more, mixed, as: 791H type (1301-1), 4302 types (road changes 2#), T6302 type, T161B type, 3501 types, 3411 types, KTR-101 type and KTR-401 type.
Technical scheme of the present invention also comprises a kind of secondary tackify cast asphalt concrete production technique of design, it is characterized in that, described production technique comprises following procedure of processing:
The first step: the matrix pitch in reactor is heated to 170～200 ℃.
The first step: matrix pitch is insulated and stirred under 500～1000r/min speed, adds active tackifier, dispersion agent, properties-correcting agent and naphthenic oil.Until properties-correcting agent, in pitch fully after swelling, stirring velocity rises to 2000～4000r/min, opens the colloidal mill circulation shear being connected with reactor simultaneously, obtains the dedicated modified pitch of cast-type.
The 3rd step: in bituminous concrete mixing building, under 220～240 ℃ of conditions, add active tackifier, the dedicated modified pitch of cast-type, high-quality grating mineral aggregate, fully mix and stir all with after, make the cast asphalt concrete of secondary tackify.
The present invention is by secondary technics of enhancing viscosity, the adhesive power that regulates active tackifier dosage that mineral aggregate and modifying asphalt are formed in the asphalt mixing stage.The mechanical property that improves cast asphalt concrete, meets cast asphalt concrete technical indicator, makes it simple to operate, facilitates feasible.
Embodiment:
Embodiment 1-5
In bituminous concrete mixing process, by volume, be directly that 0.01%～0.08% active tackifier of bituminous concrete total amount add and mix in cylinder and mineral aggregate and modifying asphalt mix 30 minutes.
The impact of table 1 different activities tackifier dosage on cast asphalt concrete performance
For the mineral aggregate of different gradation, secondary tackify method can play good effect.Use secondary tackify method, different gradation mineral aggregate is tested, and obtain the results of property of following cast asphalt concrete.
The impact of two tackify methods of table 2 on different gradation Properties of Asphalt Mixture
The corresponding mixture gradation table of table 3
According to table 1, obviously find out, secondary tackify method effect is better than traditional method.Add after active tackifier, the index of cast asphalt concrete is clearly better, and increases active tackifier consumption, more can guarantee all technical.Associative list 2, table 3 are known: for the mineral aggregate of different gradation, the concrete after secondary tackify can meet the technical indicator of cast-type compound, therefore secondary tackify method has good adaptability to the compound of different gradation.
Claims (4)
1. a secondary tackify method of preparing cast asphalt concrete, is characterized in that:
The first step: the matrix pitch in reactor is heated to 170～200 ℃;
Second step: matrix pitch is insulated and stirred under 500～1000r/min speed, adds active tackifier, dispersion agent, properties-correcting agent and naphthenic oil, by weight percentage, active tackifier 0.1～0.5%, dispersion agent 0.1～0.5%, properties-correcting agent 6～14%, naphthenic oil 0.5～10%, all the other are matrix pitch; Until properties-correcting agent, in pitch fully after swelling, stirring velocity rises to 2000～4000r/min, opens the colloidal mill circulation shear being connected with reactor simultaneously, obtains the dedicated modified pitch of cast-type;
The 3rd step: in bituminous concrete mixing building, under 220～240 ℃ of conditions, add active tackifier, the dedicated modified pitch of cast-type, high-quality grating mineral aggregate, by weight percentage, active tackifier 0.01～0.1%, the dedicated modified pitch 6～9% of cast-type, all the other are high-quality grating mineral aggregate, fully mix and stir all with after, make the cast asphalt concrete of secondary tackify.
One or more that above-mentioned active tackifier are vulcanizing agents mix,
One or more that above-mentioned dispersion agent is organic amine compound mix,
Above-mentioned properties-correcting agent is that one or more of SBS polymkeric substance mix.
2. the secondary tackify method of preparing cast asphalt concrete according to claim 1, is characterized in that: tackifier are selected from sulphur, sulfocompound, superoxide, metal oxide;
3. the secondary tackify method of preparing cast asphalt concrete according to claim 1, is characterized in that: dispersion agent is selected from sulphenamide compounds, aldehyde amines compound;
4. the secondary tackify method of preparing cast asphalt concrete according to claim 1, is characterized in that: properties-correcting agent is selected from 791H type (1301-1) 4302 types (road changes 2#), T6302 type, T161B type, 3501 types, 3411 types, KTR-101 type, KTR-401 type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310220347.2A CN104211324B (en) | 2013-06-05 | 2013-06-05 | Secondary tackifying method for preparing cast asphalt concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310220347.2A CN104211324B (en) | 2013-06-05 | 2013-06-05 | Secondary tackifying method for preparing cast asphalt concrete |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104211324A true CN104211324A (en) | 2014-12-17 |
| CN104211324B CN104211324B (en) | 2016-03-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310220347.2A Active CN104211324B (en) | 2013-06-05 | 2013-06-05 | Secondary tackifying method for preparing cast asphalt concrete |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1586606A1 (en) * | 2004-04-14 | 2005-10-19 | KRATON Polymers Research B.V. | An asphalt binder based on polymer modified bitumen, hot mix asphalts made thereof, and pavements made therefrom |
| CN101074321A (en) * | 2006-05-19 | 2007-11-21 | 中国石油化工股份有限公司 | Road-surface asphalt modified additive at normal temperature and its production |
| CN101475351A (en) * | 2009-01-20 | 2009-07-08 | 钦兰成 | Cold mixing high polymer modified asphalt concrete and preparing method thereof |
| CN101508848A (en) * | 2009-03-18 | 2009-08-19 | 广州路翔股份有限公司 | Modified emulsified asphalt, production method and CA mortar comprising the emulsified asphalt |
| CN101629405A (en) * | 2009-07-24 | 2010-01-20 | 武汉理工大学 | Waterproof bond stress absorbing bridge deck pavement material preparation method |
-
2013
- 2013-06-05 CN CN201310220347.2A patent/CN104211324B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1586606A1 (en) * | 2004-04-14 | 2005-10-19 | KRATON Polymers Research B.V. | An asphalt binder based on polymer modified bitumen, hot mix asphalts made thereof, and pavements made therefrom |
| CN101074321A (en) * | 2006-05-19 | 2007-11-21 | 中国石油化工股份有限公司 | Road-surface asphalt modified additive at normal temperature and its production |
| CN101475351A (en) * | 2009-01-20 | 2009-07-08 | 钦兰成 | Cold mixing high polymer modified asphalt concrete and preparing method thereof |
| CN101508848A (en) * | 2009-03-18 | 2009-08-19 | 广州路翔股份有限公司 | Modified emulsified asphalt, production method and CA mortar comprising the emulsified asphalt |
| CN101629405A (en) * | 2009-07-24 | 2010-01-20 | 武汉理工大学 | Waterproof bond stress absorbing bridge deck pavement material preparation method |
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| Publication number | Publication date |
|---|---|
| CN104211324B (en) | 2016-03-09 |
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