CN103146209A - Nanoscale mud slag composite blue asbestos modified base asphalt and preparation method thereof - Google Patents
Nanoscale mud slag composite blue asbestos modified base asphalt and preparation method thereof Download PDFInfo
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- CN103146209A CN103146209A CN 201310104538 CN201310104538A CN103146209A CN 103146209 A CN103146209 A CN 103146209A CN 201310104538 CN201310104538 CN 201310104538 CN 201310104538 A CN201310104538 A CN 201310104538A CN 103146209 A CN103146209 A CN 103146209A
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Abstract
The invention discloses nanoscale mud slag composite blue asbestos modified base asphalt and a preparation method thereof. The nanoscale mud slag composite blue asbestos modified base asphalt is prepared from the following components in percentage by mass: 5-15 percent of mud slags, 5-15 percent of blue asbestos, 1-9 percent of coupling reagent and 65-79 percent of base asphalt. Compared with the prior art, the prepared modified base asphalt disclosed by the invention has the advantages that raw materials are easily available, cost is low and preparation technology is simple; moreover, the prepared modified base asphalt has good temperature sensing performance and high and low-temperature resistance.
Description
Technical field
The present invention relates to a kind of composite modified matrix pitch and preparation method thereof, be specifically related to the compound crocidolite modified substrate of a kind of nano level slag mud pitch and preparation method thereof.
Background technology
Pitch is as a kind of viscoelastic material, lower and distribution range is wider due to its relative molecular weight, strong to temperature sensitivity, the high temperature deliquescing is clamminess, low temperature becomes fragile and easily splits, can produce catabiosis under high temperature and uviolizing, and fatigue performance is poor, thereby has limited to a certain extent its use properties.Improve asphalt performance although new process for preparing asphalt is constantly explored by asphalt production producer, highway layout department also does one's utmost to adopt the high-quality heavy duty road asphalt, and the result of use of many roads is still unsatisfactory.Therefore, need bituminous material is carried out modification, add one or several material modified in matrix pitch or matrix pitch compound, by suitable complete processing, make material modified melting or be dispersed in matrix pitch or the matrix pitch compound in, form homogenizing mixture, thereby improve or improve the pavement performance of asphalt, improve its anti-rut, anti-cold cracking, antifatigue and the performance such as anti-aging.
At present, research to modifying asphalt, all to utilize high molecular polymer as properties-correcting agent mostly, disclose take polymer P E and nano imvite as properties-correcting agent as side's grade green for a long time (patent publication No.: CN 102020861 A), by high-speed shearing machine, polymer P E and nano imvite homogeneous shear have been dispersed in the matrix pitch of fusing; Xia Xianming etc. (patent publication No.: CN 102181163 A) disclose take shoddy and styrenic block copolymer SBS as properties-correcting agent, by adding activator, permeate agent, shoddy, SBS and aromatic hydrocarbon oil to make the matrix pitch swelling in the melting matrix pitch, then adopt high-speed shearing machine to shear and make.It is high that above patent exists the polymer modifiers cost, adopt simultaneously the high-energy equipments such as high-speed shearing machine also to increase production cost, adopt in addition polymer modifiers modified substrate pitch also to exist temperature sensitivity and high and low temperature resistance are improved the shortcomings such as effect is limited.
Summary of the invention
Have for available technology adopting high polymer material modified substrate pitch that production cost is high, the course of processing is complicated and mostly exist temperature sensitivity and high and low temperature resistance to improve the deficiency of poor effect, the invention provides the compound crocidolite modified substrate of a kind of nano level slag mud pitch and preparation method thereof, to obtain to have the modified substrate bituminous material that production cost is low, technological process is simple, temperature sensitivity is low and have high-low temperature resistant.
The present invention is realized by the following technical programs:
The compound crocidolite modified substrate of a kind of nano level slag mud pitch, described modified substrate pitch is comprised of slag mud, crocidolite, coupling agent and matrix pitch, and its content is respectively: slag shale amount mark accounts for 5 ~ 15%, the crocidolite massfraction accounts for 5 ~ 15%, the coupling agent massfraction accounts for 1 ~ 9%, the matrix pitch massfraction accounts for 65 ~ 79%.
Described slag mud is one or more in boron slag mud, electrolysis melt cinder mud, flower bulb alkaline residue mud, organic acid gypsum tailings, barium slag, strontium slag, crimson body refuse, and slag mud has particulate state and two kinds of forms of fiber bundle-like, wherein grain diameter is 10 ~ 100nm, fiber bundle-like length is 80 ~ 100nm, and diameter is 15 ~ 40nm.
Described crocidolite refers to blue amphibole asbestos, comprises fine ferroglaucophane asbestos, magnesia arfvedsonite asbestos and the glittering stone asbestos of sodium, and its main component is (Na, K, Ca)
3-4Mg
6Fe
(II
)(Fe
(II
), Al)
3-4[(OH)
4/ Si
16O
44], the grain diameter size is 15 ~ 50nm.
Described coupling agent is silane coupling agent, is KH550 or DL602.
Described matrix pitch is for satisfying the pitch of " highway engineering pitch and Asphalt Mixture Experiment rules (JTJ052-2000) " and " standard specification for construction and acceptance of highway asphalt pavement (JTGF40-2004) ", its penetration degree scope is 20 ~ 150/0.1mm, and softening temperature is 40 ~ 100 ° of C.
The preparation method of the compound crocidolite modified substrate of a kind of nano level slag mud pitch, concrete steps are as follows:
Step 1: in the metal stirred pot of band heating, matrix pitch is heated to 130 ~ 160 ° of C, pitch is all melted;
Step 2: the Heating temperature of stirred pot is set, and then holding temperature starts stirred pot between 130 ~ 160 ° of C, adds successively coupling agent, slag mud and crocidolite under 5000 ~ 10000r/min rotating speed in stirred pot;
Step 3: mix 2 ~ 3h, the compound crocidolite of nano level slag mud is uniformly dispersed in matrix pitch;
Step 4: the stirred pot compound is cooling to room temperature, namely make the compound crocidolite modified substrate of nano level slag mud pitch.
Further, in described preparation method's step 2, the Heating temperature of stirred pot is set, must keeps whole course of processing constant temperature, thermostat temperature is between 130 ~ 160 ° of C, and this is conducive to improve the emulsifying property of pitch, greatly strengthens the stability of pitch.
The present invention compared with prior art, its notable feature is:
1, high, the satisfactory mechanical property of high temperature resistant, the acid-fast alkali-proof of crocidolite material, stability and have the key property such as purifying contaminated air is applied to the bituminous material field, can improve the application performance of matrix pitch, has important application prospect;
2, silane coupling agent has the coupling function of setting up special " molecular bridge " between nano-powder and organic polymer molecule, has improved slag mud and crocidolite dispersiveness and the consistency in matrix pitch;
3, slag mud material environmental protection, stable performance, cheap, aboundresources, and this modified substrate process for preparing asphalt need not to use the special equipment of the complicated highly energy-consumings such as high-speed shearing emulsion machine or shredder, preparation process is simple, shows to adopt the compound crocidolite modified substrate of nano level slag mud pitch to have the advantage that reduces production costs;
4, contain in the slag mud material a large amount of nano particles, specific surface area is large, adsorptive power is strong, active high, good dispersity and the unsaturated electric charge of particle surface many, strong with matrix pitch Chemical bond ability, can improve the structure properties of matrix pitch, improve temperature-sensitive performance and the high temperature resistant property of matrix pitch.
Embodiment
Further describe feature of the present invention below by embodiment, but the present invention is not limited to following embodiment.
Embodiment 1:
In the metal stirred pot of band heating, 500g AH-70 matrix pitch is heated to 160 ° of C, makes its whole fusings.The temperature regulating device of agitator after all melting, pitch is set, make temperature maintain 160 ° of C, then start agitator, add successively the fine ferroglaucophane asbestos of 38g KH550 coupling agent, 115g citric acid gypsum slag and 115g in stirred pot under the 5000r/min rotating speed, mix 2h, after stirring is completed, that finely dispersed compound is cooling to room temperature, namely make modified substrate pitch.
Embodiment 2:
In the metal stirred pot of band heating, 500g AH-70 matrix pitch is heated to 130 ° of C, makes its whole fusings.The temperature regulating device of agitator after all melting, pitch is set, make temperature maintain 130 ° of C, then start agitator, add successively the fine ferroglaucophane asbestos of 6g KH550 coupling agent, 63g lactic acid gypsum tailings and 63g in stirred pot under the 10000r/min rotating speed, mix 3h, after stirring is completed, that finely dispersed compound is cooling to room temperature, namely make modified substrate pitch.
Embodiment 3:
In the metal stirred pot of band heating, 500g AH-70 matrix pitch is heated to 145 ° of C, makes its whole fusings.The temperature regulating device of agitator after all melting, pitch is set, make temperature maintain 145 ° of C, then start agitator, add successively the fine ferroglaucophane asbestos of 60g DL602 coupling agent, 104g citric acid gypsum slag and 34g in stirred pot under the 5000r/min rotating speed, mix 2h, after stirring is completed, that finely dispersed compound is cooling to room temperature, namely make modified substrate pitch.
Embodiment 4
The compound crocidolite modified substrate of nano level slag mud asphalt performance is estimated:
Penetrative index is tested by GB/T0604-2000;
Softening temperature is tested by GB/T0606-2000;
Ductility is tested by GB/T0605-2000;
Test result is as shown in table 1:
Table 1
| Performance index | The AH-70 matrix pitch | Embodiment 1 | Embodiment 2 | Embodiment 3 |
| Penetrative index PI | -1.68 | -0.03 | 0.01 | 0.12 |
| Softening temperature/° C | 50 | 76 | 80 | 84 |
| 5 ° of C ductility/cm | 41 | 69 | 75 | 78 |
The temperature sensitivity of pitch is called for short temperature sensibility, refers to the asphaltic nature degree that is acted upon by temperature changes.Usually adopt penetrative index PI to represent, penetrative index is larger, and the temperature sensitivity of pitch is lower, and namely the temperature-sensitive performance is better.
Softening temperature refers to the condition temperature of pitch when a specific condition of experiment is issued to certain viscosity.Softening temperature is higher, and the high-temperature stability of pitch is better.
Ductility typically refers to makes 8 font standard specimens with pitch, and usually adopting as requested temperature is 25 ° of C, 15 ° of C, 10 ° of C, 5 ° of C, with the length (cm) of 5cm per minute (when low temperature adopts the 1cm per minute) when speed is stretched to fracture.Ductility is larger, and plasticity is larger, more is conducive to resist the low-temperature deformation ability.
As can be seen from Table 1, after adopting the compound crocidolite of nano level slag mud to carry out modification to matrix pitch, its penetrative index, softening temperature and three performance index of 5 ° of C ductilities all significantly improve than before unmodified, show that the present invention adopts the compound crocidolite modified substrate of nano level slag mud pitch to have temperature-sensitive performance and high-and low-temperature resistance performance preferably.
Claims (8)
1. the compound crocidolite modified substrate of nano level slag mud pitch, it is characterized in that: described modified substrate pitch is comprised of slag mud, crocidolite, coupling agent and matrix pitch, and its content is respectively: slag shale amount mark accounts for 5 ~ 15%, the crocidolite massfraction accounts for 5 ~ 15%, the coupling agent massfraction accounts for 1 ~ 9%, the matrix pitch massfraction accounts for 65 ~ 79%.
2. the compound crocidolite modified substrate of a kind of nano level slag mud according to claim 1 pitch, it is characterized in that: described slag mud is one or more in boron slag mud, electrolysis melt cinder mud, flower bulb alkaline residue mud, organic acid gypsum tailings, barium slag, strontium slag, crimson body refuse, and slag mud has particulate state and two kinds of forms of fiber bundle-like, wherein grain diameter is 10 ~ 100nm, fiber bundle-like length is 80 ~ 100nm, and diameter is 15 ~ 40nm.
3. the compound crocidolite modified substrate of a kind of nano level slag mud according to claim 1 pitch, it is characterized in that: described crocidolite comprises fine ferroglaucophane asbestos, magnesia arfvedsonite asbestos and the glittering stone asbestos of sodium for blue amphibole asbestos, and its main component is (Na, K, Ca)
3-4Mg
6Fe (II) (Fe (II), Al)
3-4[(OH)
4/ Si
16O
44], the grain diameter size is 15 ~ 50nm.
4. the compound crocidolite modified substrate of a kind of nano level slag mud according to claim 1 pitch, it is characterized in that: described coupling agent is silane coupling agent, is KH550 or DL602.
5. the compound crocidolite modified substrate of a kind of nano level slag mud according to claim 1 pitch, it is characterized in that: described matrix pitch penetration degree scope is 20 ~ 150/0.1mm, softening temperature is 40 ~ 100 ° of C.
6. the preparation method of the compound crocidolite modified substrate of a nano level slag mud as claimed in claim 1 pitch is characterized in that: comprise following step:
Step 1: in the stirred pot of band heating, matrix pitch is heated to 130 ~ 160 ° of C, pitch is all melted;
Step 2: the Heating temperature of stirred pot is set, then starts stirred pot, add successively coupling agent, nano level slag mud and crocidolite in stirred pot under certain rotating speed;
Step 3: mix 2 ~ 3h, the compound crocidolite of nano level slag mud is uniformly dispersed in matrix pitch;
Step 4: the stirred pot compound is cooling to room temperature, namely make the compound crocidolite modified substrate of nano level slag mud pitch.
7. preparation method according to claim 6, it is characterized in that: in described step 2, the Heating temperature of stirred pot is set, must keeps whole course of processing constant temperature, thermostat temperature is between 130 ~ 160 ° of C.
8. preparation method according to claim 6, it is characterized in that: in described step 2, the rotating speed of agitator is 5000 ~ 10000r/min.
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|---|---|---|---|
| CN 201310104538 CN103146209A (en) | 2013-03-28 | 2013-03-28 | Nanoscale mud slag composite blue asbestos modified base asphalt and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103602323A (en) * | 2013-10-22 | 2014-02-26 | 西南石油大学 | Nanometer plugging agent for drilling fluid and preparation method thereof |
| CN104560084A (en) * | 2013-10-22 | 2015-04-29 | 中国石油化工股份有限公司 | Preparation method for blended asphalt |
| CN110317463A (en) * | 2019-08-07 | 2019-10-11 | 太原理工大学 | A kind of more partial size red mud modified pitch, preparation method, the asphalt using the modified pitch |
-
2013
- 2013-03-28 CN CN 201310104538 patent/CN103146209A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103602323A (en) * | 2013-10-22 | 2014-02-26 | 西南石油大学 | Nanometer plugging agent for drilling fluid and preparation method thereof |
| CN104560084A (en) * | 2013-10-22 | 2015-04-29 | 中国石油化工股份有限公司 | Preparation method for blended asphalt |
| CN103602323B (en) * | 2013-10-22 | 2015-11-11 | 西南石油大学 | Drilling fluid nanometer plugging agent and preparation method thereof |
| CN104560084B (en) * | 2013-10-22 | 2017-02-01 | 中国石油化工股份有限公司 | Preparation method for blended asphalt |
| CN110317463A (en) * | 2019-08-07 | 2019-10-11 | 太原理工大学 | A kind of more partial size red mud modified pitch, preparation method, the asphalt using the modified pitch |
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Application publication date: 20130612 |