CN101767965A - Technology for blending modified cold mix asphalt - Google Patents
Technology for blending modified cold mix asphalt Download PDFInfo
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- CN101767965A CN101767965A CN200910251610A CN200910251610A CN101767965A CN 101767965 A CN101767965 A CN 101767965A CN 200910251610 A CN200910251610 A CN 200910251610A CN 200910251610 A CN200910251610 A CN 200910251610A CN 101767965 A CN101767965 A CN 101767965A
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Abstract
The invention provides a technology for blending modified cold mix asphalt, comprising the materials of modified cold mix asphalt, wrapping agent selected from solid alkyl cationic surfactant, water and aggregate, and uses equipment such as a modified cold mix asphalt liquid atomizer with higher atomization consistency and viscosity, a nebulizer of nebulization wrapping liquid, a mixed stirrer, a metrical instrument, a container and the like. The aggregate composition conforms with requirements of standard JTG F40-2004 and JTG E42-2005, and the aggregate with the grain diameter being less than 0.15mm is replaced by cement powder. The asphalt-aggregate ratio is 4-12%. The spraying amount of the wrapping agent accounts for 1-2.5% of the weight of the aggregate. The blending technology can be completed by the following three steps: taking aggregate with the grain diameter being more than 0.15mm, spraying the wrapping agent, and blending with 25-50% of cold mix asphalt; taking aggregate with the grain diameter being less than 0.15mm, and evenly blending with the first mixture; and finally blending residual cold mix asphalt or diluted cold mix asphalt with the blended mixture to form tri-layer wrapped mastic asphalt.
Description
Technical field
The present invention relates to the mix technology of a kind of highway pavement,, can access the pavement asphalt compound that meets JTG F40-2004 requirement by this mix technology with cold-mix asphalt.
Background technology
Highway pavement adopts pitch as the road surface gelling material in a large number.And pitch is at first wanted heating and melting as gelling material, and high class pavement is wanted modification processing, and simultaneously, gathering materials also to be heated to 200 ℃, carries out mix then, under keeping warm mode, through transporting, paving, roll, forms bituminous pavement.All processes need to consume a large amount of fuel, produce greenhouse gases.Simultaneously, engineering construction is subjected to weather effect serious, and operation cooperates strict, and material use efficiency is lower, and waste is serious.Serious environment pollution and workmen's is healthy.
The modification cold-mix asphalt has solved not to be needed can form at normal temperatures to meet the bituminous concrete that JTG F40-2004 requires to gathering materials and pitch heats.This mix technology, be different from hot asphalt mixture mix, transport, pave, roll, be mix Technology at cold-mix asphalt exploitation.
Cold-mix asphalt can be divided into many types according to the kind and the ratio of its viscosity and solid content and properties-correcting agent, to adapt to different engineering occasions.But different cold-mix asphalts has different processing requirements with aggregate blending.For coventional type cold-mix asphalt (promptly not having properties-correcting agent), with aggregate blending the time, can be directly mix in any order, to the modified version cold-mix asphalt, to the permeable type compound of open grain, mix arbitrarily.
Summary of the invention
The object of the present invention is to provide a kind of technology for blending modified cold mix asphalt, be used for alternative heated bitumen or heat modification pitch, the existing heated bitumen of solution can not store, the engineering use properties is poor, use short reaching in season wanted demanding problem to the use weather.Also having solved existing in the market modified emulsifying asphalt can not be with not reaching more than the 2cm and the low problem of performance index with mix bituminous concrete or its pavement asphalt concrete paving thickness.Make the modification cold-mix asphalt can be good at and the road material that gathers materials and adhere to and form similar hot-mixed asphaltic concrete.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of technology for blending modified cold mix asphalt, its material comprise the modification cold-mix asphalt, be selected from wrapping agent, water, gathering materials of solid-state alkyls cationic surfactant; And adopt the higher modification cold-mix asphalt device for atomizing liquid of to atomize denseness and viscosity, atomizer that atomizing wraps liquid, mixed stirring device, measuring instrument, container etc.; It is characterized in that: described gathering materials formed meet the specifications JTG F40-2004 requirement and JTG E42-2005 requirement; For gathering materials of the following particle diameter of 0.15mm in gathering materials, by cement flour is replaced.Bitumen aggregate ratio (cold-mix asphalt evaporation residue (remove and anhydrate) and aggregate quality ratio) is 4%～12%; Wrapping agent sprinkling amount is 1% to 2.5% of coarse aggregate weight, and described mix technology is divided into three steps and finishes:
For the first time, get in gathering materials particle diameter the above particle diameter of 0.15mm gather materials spray wrap agent after with the cold-mix asphalt mix of 25%～50% amount;
For the second time, with below the 0.15mm particle diameter gather materials with above-mentioned first time mixture mix is even once more;
For the third time, with the cold-mix asphalt after remaining cold-mix asphalt or the dilution again with above-mentioned mix after mixture carry out mix, form and to have three layers of compound that wraps, i.e. coarse aggregate-cold-mix asphalt-cement+fine aggregate-cold-mix asphalt (dilution cold-mix asphalt).
The compound that described this mix technology mix goes out meets JTG F40-2004 standard-required through the test specimen intensity that forms after the conventional maintenance; Its leading indicator: Marshall stability: AC class compound 11～20KN, flow valuve 10～40; SMA class compound 15～17KN, flow valuve 10～27; OGFC class compound 8～12KN, flow valuve 15～30.
Describedly wrap that agent is selected from lauryl amine or the octadecylamine in the solid-state alkyls cationic surfactant or tetracosyl amine is a kind of or its mixture.
The device for atomizing liquid of the modification cold-mix asphalt that described can atomize denseness and viscosity are higher requires to form the 40MPa high pressure, with heavy-gravity cold-mix asphalt atomisation.
Described gathering materials, for meeting basalt or the rocks such as limestone or andesite or diabase that JTG F40-2004 requires, its true sheet index request is for being not more than 2%.
Modification cold-mix asphalt mixed stirring device is the forced action type mixing device, as general mixing devices such as cement plaster blender or concrete mixer or asphalt mixing stations, or makes special-purpose cold-mix asphalt compound force whipping appts or artificial mix utensil.
Calcium ions and magnesium ions content in the described water is no more than 120mg.
Described measuring instrument, its Measuring Precision require to reach more than 3/1000ths.
Wrapping agent is mainly the modification cold-mix asphalt can not broken away from the good adhesion of coarse aggregate.Mix cold-mix asphalt for the first time is mainly and makes the coarse aggregate surface have good surface to wrap, and avoids the big a lot of fine aggregates doubly of surface area ratio to rob the suction cold-mix asphalt, adds remaining cold-mix asphalt at last again and makes the fine aggregate surface wrap cold-mix asphalt.
For the compound of similar AC class, because of its continuous grading, fine aggregate content is more, therefore, when wrapping cold-mix asphalt for the second time, can be with its dilute with water, make its viscosity be reduced to 270mpa.s following the time, it is proper to wrap mix again.And the cold-mix asphalt that wraps for the first time, according to climatic condition, can adopt solid content is 74%, 72%, 70%, and even 64%.
For the compound of similar SMA, OGFC type, because of its gap gradation, fine aggregate is fewer, can dilute.Direct mix.
If, the breeze in the fine aggregate can be substituted with cement for emphasizing to strengthen the Young's modulus of cold-mix asphalt compound.If strengthen its Marshall stability fast, reduce its flow valuve simultaneously, can be in wrapping for the second time the dilute with water cold-mix asphalt.
Calcium ions and magnesium ions content is no more than 120mg in the above-described water.
Positively effect of the present invention: the present invention forms the cold-mix asphalt mix technology of intensity jointly for two kinds of gelling material that need the cement participation of continuous grading, adjustment by technology, the Marshall stability and the flow valuve of control compound reach the pavement structural strength requirement of design.
Embodiment
Major equipment comprises: mixing device, shredder, temperature control system, metering system.
Embodiment 1: a kind of AC type cold-mix asphalt compound preparation
Component: by weight percentage, 4# modification cold-mix asphalt 7.45%, continuous grading gathers materials 86.55%, and wherein cement 4%, wraps agent 2%.
The preparation method: the aggregate blending of the above particle diameter of 0.15mm is even, and sprinkling wraps agent, and then 30% in the cold-mix asphalt added mix in the coarse aggregate, adds following fine aggregate of 0.15mm and R42.5# cement mix then 60 seconds.Remaining cold-mix asphalt is diluted to 64%, joins then and stirred once more in the compound that wraps fine aggregate 60 seconds.Discharging.
Embodiment 2: a kind of AC type cold-mix asphalt compound preparation
A kind of AC type cold-mix asphalt compound preparation
Component: by weight percentage, 4# modification cold-mix asphalt: 7.45%, continuous grading gathers materials 88.55%, and wherein cement 4%, wraps agent 2%.
The preparation method: particle diameter is even greater than the coarse aggregate mix of 0.15mm, and sprinkling wraps agent, and then 30% in the cold-mix asphalt added mix in the coarse aggregate, adds fine aggregate and R42.5# cement mix then 60 seconds.With remaining cold-mix asphalt, join then in the compound that has wrapped less than the fine aggregate of 0.15mm and stirred once more 60 seconds.Discharging.
Embodiment 3: a kind of OGFC type cold-mix asphalt compound preparation
Component: by weight percentage, 1# modification cold-mix asphalt: 8.52%, continuous grading gathers materials 89.98%, and wherein cement 7.7%, wraps agent 1.5%.
The preparation method: particle diameter is even greater than the coarse aggregate mix of 0.15mm, and sprinkling wraps agent, and then 40% in the cold-mix asphalt added mix in the coarse aggregate, adds fine aggregate and R42.5# cement mix then 60 seconds.With remaining cold-mix asphalt, join then and wrapped particle diameter smaller or equal to stirring once more in the compound of the fine aggregate of 0.15mm 60 seconds.Discharging.
Test detects: press People's Republic of China's industry standard: highway engineering pitch and asphalt testing regulation T702-2000, and T709-2000, the result is as follows:
| Test subject | Marshall stability | Flow valuve | The secondary stability | The secondary flow valuve |
| Embodiment 1 | 15.15 thousand Ns | ??0.85 | ??14.57 | ??3.11 |
| Embodiment 2 | ??11.23 | ??15 | ??9.92 | ??26 |
| Embodiment 3 | 10.5 thousand Ns | ??24 |
Claims (8)
1. technology for blending modified cold mix asphalt, its material comprise wrapping agent, water, gathering materials of modification cold-mix asphalt, solid-state alkyls cationic surfactant; And adopt the higher modification cold-mix asphalt device for atomizing liquid of to atomize denseness and viscosity, atomizer that atomizing wraps liquid, mixed stirring device, measuring instrument, container etc.; It is characterized in that: described gathering materials formed meet the specifications JTG F40-2004 requirement and JTG E42-2005 requirement; For gathering materials of the following particle diameter of 0.15mm in gathering materials, replace with cement flour; Bitumen aggregate ratio is 4%～12%; Wrapping agent sprinkling amount is 1% to 2.5% of coarse aggregate weight, and described mix technology is divided into three steps and finishes:
For the first time, get in gathering materials particle diameter the above particle diameter of 0.15mm gather materials spray wrap agent after with the cold-mix asphalt mix of 25%～50% amount;
For the second time, with below the 0.15mm particle diameter gather materials with above-mentioned first time mixture mix is even once more;
For the third time, with the cold-mix asphalt after remaining cold-mix asphalt or the dilution again with above-mentioned mix after mixture carry out mix, form and to have three layers of compound that wraps.
2. modification cold-mix asphalt mix technology as claimed in claim 1 is characterized in that: the compound that described this mix technology mix goes out meets the JTGF40-2004 standard-required through the test specimen intensity that forms after the conventional maintenance; Its leading indicator: Marshall stability: AC class compound 11～20KN, flow valuve 10～40; SMA class compound 15～17KN, flow valuve 10～27; OGFC class compound 8～12KN, flow valuve 15～30.
3. technology for blending modified cold mix asphalt as claimed in claim 1 is characterized by, and describedly wraps that agent is selected from lauryl amine or the octadecylamine in the solid-state alkyls cationic surfactant or tetracosyl amine is a kind of or its mixture.
4. technology for blending modified cold mix asphalt as claimed in claim 1 is characterized by, and the device for atomizing liquid of the modification cold-mix asphalt that described can atomize denseness and viscosity are higher requires to form the 40MPa high pressure, with heavy-gravity cold-mix asphalt atomisation.
5. technology for blending modified cold mix asphalt as claimed in claim 1 is characterized by, and described gathering materials, for meeting basalt or the rocks such as limestone or andesite or diabase that JTG F40-2004 requires, its true sheet index request is for being not more than 2%.
6. technology for blending modified cold mix asphalt as claimed in claim 1, it is characterized by: modification cold-mix asphalt mixed stirring device is the forced action type mixing device, as general mixing devices such as cement plaster blender or concrete mixer or asphalt mixing stations, or make special-purpose cold-mix asphalt compound force whipping appts or artificial mix utensil.
7. as claim 1 technology for blending modified cold mix asphalt, it is characterized by: the calcium ions and magnesium ions content in the described water is no more than 120mg.
8. as claim 1 technology for blending modified cold mix asphalt, it is characterized by: described measuring instrument, its Measuring Precision require to reach more than 3/1000ths.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910251610A CN101767965A (en) | 2009-12-25 | 2009-12-25 | Technology for blending modified cold mix asphalt |
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| CN200910251610A CN101767965A (en) | 2009-12-25 | 2009-12-25 | Technology for blending modified cold mix asphalt |
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| CN101767965A true CN101767965A (en) | 2010-07-07 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102442803A (en) * | 2010-10-15 | 2012-05-09 | 安徽三缔沥青材料有限公司 | Mixing process of modified cold-mix asphalt mixture |
| CN104086219A (en) * | 2014-06-26 | 2014-10-08 | 华南理工大学 | Stone surface performance improvement system and stone surface performance improvement method |
| CN110540381A (en) * | 2018-05-29 | 2019-12-06 | 江苏一诺路桥工程检测有限公司 | asphalt mixture preparation method based on asphalt cement |
| CN111794046A (en) * | 2020-06-11 | 2020-10-20 | 福建省铁拓机械股份有限公司 | Stepped stirring method for asphalt mixture |
| CN112573883A (en) * | 2020-12-30 | 2021-03-30 | 南通福伦利新材料有限公司 | Preparation process and paving method of normal-temperature asphalt capable of forming high-porosity and high-modulus asphalt |
-
2009
- 2009-12-25 CN CN200910251610A patent/CN101767965A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102442803A (en) * | 2010-10-15 | 2012-05-09 | 安徽三缔沥青材料有限公司 | Mixing process of modified cold-mix asphalt mixture |
| CN104086219A (en) * | 2014-06-26 | 2014-10-08 | 华南理工大学 | Stone surface performance improvement system and stone surface performance improvement method |
| CN110540381A (en) * | 2018-05-29 | 2019-12-06 | 江苏一诺路桥工程检测有限公司 | asphalt mixture preparation method based on asphalt cement |
| CN111794046A (en) * | 2020-06-11 | 2020-10-20 | 福建省铁拓机械股份有限公司 | Stepped stirring method for asphalt mixture |
| CN112573883A (en) * | 2020-12-30 | 2021-03-30 | 南通福伦利新材料有限公司 | Preparation process and paving method of normal-temperature asphalt capable of forming high-porosity and high-modulus asphalt |
| CN112573883B (en) * | 2020-12-30 | 2022-08-09 | 南通福伦利新材料有限公司 | Preparation process and paving method of normal-temperature asphalt capable of forming high-porosity and high-modulus asphalt |
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Application publication date: 20100707 |