CN106046820B - A kind of preparation method of hard emulsified asphalt - Google Patents
A kind of preparation method of hard emulsified asphalt Download PDFInfo
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- CN106046820B CN106046820B CN201610665261.4A CN201610665261A CN106046820B CN 106046820 B CN106046820 B CN 106046820B CN 201610665261 A CN201610665261 A CN 201610665261A CN 106046820 B CN106046820 B CN 106046820B
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- asphalt
- emulsified asphalt
- hard
- bitumen
- soap lye
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/54—Aqueous solutions or dispersions
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
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- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- Road Paving Structures (AREA)
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Abstract
The present invention provides a kind of preparation methods of hard emulsified asphalt, include the following steps：One, the various raw materials of certain mass percent are weighed：No. 50 hards grades of bitumen, lake asphalt, Qing Chuan rock asphalt, polymer dispersion powder, polyphosphoric acids, emulsifier, inorganic stabilizers, organic stabilizer, water；Two, No. 50 hards grades of bitumen, lake asphalt, Qing Chuan rock asphalt, polymer dispersion powder and polyphosphoric acids are stirred evenly, obtains mixture；Three, 80 DEG C are heated water to, then successively organic stabilizer, inorganic stabilizers and emulsifier are added in hot water and stir evenly, obtains soap lye, the pH value of soap lye is then adjusted using inorganic acid；Four, it is placed in colloid mill and grinds, obtain hard emulsified asphalt.The flexibility of hard emulsified asphalt prepared by the present invention is good, and adhesive property is strong, ageing-resistant, and storage stability is good, and has good crack resistance at low-temperature and endurance quality, can greatly improve Pavement Condition, prolong the service life.
Description
Technical field
The invention belongs to road engineering emulsified asphalt processing technique fields, and in particular to a kind of system of hard emulsified asphalt
Preparation Method.
Background technique
In recent years, the hard grades of bitumen that softening point is high, needle penetration low and high temperature stability is good starts extensive by road worker
Concern.Hard grades of bitumen needle penetration it is small thus it is opposite with there is biggish viscosity for plain asphalt, after being contacted with building stones
Adhesiveness is not easily to fall off by force, and the stiffness modulus for being formed by mixture is also high.Based on this, foreign countries have also carried out deep grind to it
Study carefully.Research about hard grades of bitumen appears in France in the 1980s, and that hard grades of bitumen is defined as needle penetration is small earliest
In the pitch of 25mm/10 (temperature is at 25 DEG C), and it is divided into 15/25,10/20 and 5/10 three grades.And then in Europe
Country is widely used.Simultaneously it has also been found that can be larger using hard grades of bitumen concrete in an investigation of France
Reduction road surface thickness to reducing road construction cost.In contrast, the research of China in this respect is started late but close several
Year development is very fast, and the pitch that needle penetration is 50 at present has been achieved with the application on high grade pavement.Hard grades of bitumen is mixed in pitch
After the application of solidifying soil surface obtains progress, hard emulsified asphalt is prepared using hard grades of bitumen and has also attracted road construction portion of various countries
The interest of door.Summer in South of France area, using hard prepared by the pitch that needle penetration is 40-60 or even 35-50mm/10
Matter emulsified asphalt has been applied to the region of high load.In the U.S., has hard emulsified asphalt and be applied to road surface sealing and waterproof layer
Report and relevant patent in terms of handling.
The characteristics of asphalt material is easy to produce sedimentation in this mixed system makes using the lesser pitch system of needle penetration
There are unstable features in performance for standby hard emulsified asphalt.This unstability brings hard emulsified asphalt to produce simultaneously
The unstable characteristic of problem in the process, i.e. emulsified asphalt causes it in the actual production process can for processing that the time is shorter
(a few houres or several days), this can be solved by the way that higher emulsifier content is added, but excessively high emulsifier content gesture
The demulsification time of emulsified asphalt must be greatly prolonged, this is for needing the requirement of quick open to traffic and not meeting.In order to overcome
These technical problems, Dutch LAREXFALT company develop a kind of novel emulsion system, it can not only use needle penetration compared with
Small hard grades of bitumen (20mm~30mm, 10mm) produces adhesion coating emulsified asphalt and other road surface coatings with non-stick nature
The hard emulsified asphalt used, and can guarantee the continuous-stable of properties of product in production process.The one of company's exploitation simultaneously
Kind novel emulsion stabilizer makes it possible the industrialized production of this hard emulsified asphalt, however this at present
The report of hard emulsified bituminous materials in instances.The country is also not yet studied by the preparation of hard emulsified asphalt.
Summary of the invention
Technical problem to be solved by the present invention lies in view of the above shortcomings of the prior art, provide a kind of hard emulsification drip
Green preparation method.The advantages of high-performance rigid emulsified asphalt prepared using this method, is as follows：Flexibility is good, adhesive property
By force, ageing-resistant, and storage stability is good, can not only be suitable for bituminous pavement adhesive layer, be readily applicable to ultra-thin wearing layer
Cover can be reasonably resistant to wheel shear action, and have good crack resistance at low-temperature and endurance quality, can be greatly
Pavement Condition is improved, is prolonged the service life.
In order to solve the above technical problems, the technical solution adopted by the present invention is that：A kind of preparation method of hard emulsified asphalt,
It is characterized in that, this approach includes the following steps：
Step 1: weighing the various raw materials of following mass percent：No. 50 hards grades of bitumen 50%, lake asphalt 5%, Qing Chuan rock
Pitch 1%, polymer dispersion powder 0.5%, polyphosphoric acids 0.25%, emulsifier 0.6%, inorganic stabilizers 0.1%, organic stabilizers
Agent 0.05%, surplus are water；
Step 2: weighed No. 50 hards grades of bitumen of institute in step 1 are heated to 140 DEG C~150 DEG C, then successively by lake
Pitch, Qing Chuan rock asphalt, polymer dispersion powder and polyphosphoric acids are added in No. 50 hards grades of bitumen after heating and stir evenly, and obtain
To mixture；
Step 3: heating water to 80 DEG C, hot water successively then is added in organic stabilizer, inorganic stabilizers and emulsifier
In stir evenly, soap lye is obtained, then under conditions of soap lye temperature is 60~70 DEG C, using inorganic acid by the pH value tune of soap lye
To 1.8；
2min~3min is ground Step 4: the soap lye after adjusting pH value in step 3 is added in colloid mill, obtains hard
Emulsified asphalt.
A kind of preparation method of above-mentioned hard emulsified asphalt, which is characterized in that polyphosphoric acids described in step 1 it is dense
Degree is with H3PO4Mass percent meter be greater than 100%.
A kind of preparation method of above-mentioned hard emulsified asphalt, which is characterized in that polyphosphoric acids described in step 1 it is dense
Degree is with H3PO4Mass percent be calculated as 110%~115%.
The preparation method of above-mentioned a kind of hard emulsified asphalt, which is characterized in that emulsifier described in step 1 is gram sun
Ionic emulsifying agent.
The preparation method of above-mentioned a kind of hard emulsified asphalt, which is characterized in that inorganic stabilizers described in step 1 are
CaCl2。
The preparation method of above-mentioned a kind of hard emulsified asphalt, which is characterized in that organic stabilizer described in step 1 is
PVA。
The preparation method of above-mentioned a kind of hard emulsified asphalt, which is characterized in that inorganic acid described in step 3 is hydrochloric acid.
Hard grades of bitumen primary raw material of the present invention be by than choosing, flexibility is good, viscosity is low, storage stability more
No. 50 good hards grades of bitumen；Lake asphalt be gel structure type, hardness with higher and softening point, stable structure and with drip
Blueness has fabulous compatibility, and ageing-resistant performance can be improved；Qing Chuan rock asphalt is rich in macromolecular asphalitine, and its content of ashes
It is lower, there is extremely strong adsorption capacity with rock, cohesive force can be improved；Polymer dispersion powder can be improved low temperature ductility；Poly
Phosphoric acid can be improved the stability of hard emulsified asphalt.
On the basis of the asphalt temperature and soap lye temperature that following formula is calculated, studies by test of many times, compares repeatedly,
The final temperature for determining pitch when emulsifying hard grades of bitumen is controlled at 140 DEG C~150 DEG C, and soap lye temperature is controlled at 60 DEG C~65 DEG C,
The hard emulsified asphalt of high quality can be prepared.
In formula, A --- asphalt content, %；The dosage of W --- soap lye, %；The specific heat of Ca --- pitch；Cw --- water
Specific heat；The temperature of Te --- lotion；The stabilization of Ta --- pitch；The stabilization of Tw --- soap lye.
PH value has a significant impact to emulsifying effectiveness, and directly influencing pitch can be emulsified.It is compared by test of many times
Research, it is final to determine that the pH value for preparing hard emulsified asphalt is 1.8.
Compared with the prior art, the present invention has the following advantages：
The present invention passes through than choosing, and determination prepares hard emulsified asphalt with No. 50 hards grades of bitumen, and flexibility is good, viscosity
It is small, and storage stability is good；Define modified additive lake asphalt, Qing Chuan rock asphalt, polymer dispersion powder, polyphosphoric acids
Type and volume, effectively increase the caking property and durability of hard emulsified asphalt；Define stabilizer and emulsifier
The optimum mix amount had not both made gained bitumen ductility reduction in turn ensure that storage stability is good；By inorganic stabilizers and organic steady
Determine agent and be used in compounding the dosage that can not only greatly improve emulsified asphalt storage stability, but also can be reduced emulsifier, generates
Good economic benefits.Modified additive lake asphalt, Qing Chuan rock asphalt, polymer dispersion powder, the type of polyphosphoric acids and volume
It is to be determined after than choosing, the hard emulsified asphalt with more preferable caking property and durability can be prepared；
Below with reference to embodiment, invention is further described in detail.
Specific embodiment
Embodiment 1
The preparation method of the present embodiment hard emulsified asphalt includes the following steps：
Step 1: weighing the various raw materials of mass percent as shown in Table 1；
1 embodiment of table, 1 hard emulsified asphalt formula for raw stock
Step 2: No. 50 hards grades of bitumen are heated to 145 DEG C, then successively by lake asphalt, Qing Chuan rock asphalt, dispersible cream
Rubber powder and polyphosphoric acids are added in No. 50 hards grades of bitumen after heating and stir evenly, and obtain mixture；
Step 3: heating water to 80 DEG C, hot water successively then is added in organic stabilizer, inorganic stabilizers and emulsifier
In stir evenly, obtain soap lye, then soap lye temperature be 65 DEG C under conditions of, the pH value of soap lye is adjusted to 1.8 using hydrochloric acid；
2.5min is ground Step 4: the soap lye after adjusting pH value in step 3 is added in colloid mill, obtains hard emulsification
Pitch.
According to the hard emulsified asphalt of the present embodiment the method preparation and its performance indicator is detected, result such as 2 institute of table
Show.
The performance indicator of 2 the present embodiment hard emulsified asphalt of table
As shown in Table 2, the indices of hard emulsified asphalt prepared by the present embodiment are all satisfied《Asphalt pavement construction skill
Art specification》The requirement of (JTG F40-2004).
Embodiment 2
The preparation method of the present embodiment hard emulsified asphalt the difference is that only with 1 the method for embodiment：Step
The heating temperature of No. 50 hards grades of bitumen described in two is 140 DEG C, and the temperature of soap lye described in step 3 is 60 DEG C, institute in step 4
The time for stating grinding is 3min.
Through detecting, the indices of hard emulsified asphalt prepared by the present embodiment are all satisfied《Asphalt Pavement Construction Technique
Specification》The requirement of (JTG F40-2004).
Embodiment 3
The preparation method of the present embodiment hard emulsified asphalt the difference is that only with 1 the method for embodiment：Step
The heating temperature of No. 50 hards grades of bitumen described in two is 150 DEG C, and the temperature of soap lye described in step 3 is 70 DEG C, institute in step 4
The time for stating grinding is 2min.
Through detecting, the indices of hard emulsified asphalt prepared by the present embodiment are all satisfied《Asphalt Pavement Construction Technique
Specification》The requirement of (JTG F40-2004).
The above is only presently preferred embodiments of the present invention, is not intended to limit the invention in any way.It is all according to invention skill
Art any simple modification, change and equivalence change substantially to the above embodiments, still fall within technical solution of the present invention
Protection scope in.
Claims (3)
1. a kind of preparation method of hard emulsified asphalt, which is characterized in that this approach includes the following steps：
Step 1: weighing the various raw materials of following mass percent：No. 50 hards grades of bitumen 50%, lake asphalt 5%, Qing Chuan rock asphalt
1%, polymer dispersion powder 0.5%, polyphosphoric acids 0.25%, emulsifier 0.6%, inorganic stabilizers 0.1%, organic stabilizer
0.05%, surplus is water；
Step 2: weighed No. 50 hards grades of bitumen of institute in step 1 are heated to 140 DEG C~150 DEG C, then successively by lake asphalt,
Qing Chuan rock asphalt, polymer dispersion powder and polyphosphoric acids are added in No. 50 hards grades of bitumen after heating and stir evenly, and are mixed
Close object；
Step 3: heating water to 80 DEG C, then successively organic stabilizer, inorganic stabilizers and emulsifier are added in hot water
It stirs evenly, obtains soap lye, then under conditions of soap lye temperature is 60 DEG C~70 DEG C, using inorganic acid by the pH value tune of soap lye
To 1.8；
It is ground Step 4: mixture obtained in step 2 is added in colloid mill with the soap lye after adjusting pH value in step 3
2min~3min obtains hard emulsified asphalt；
The concentration of polyphosphoric acids described in step 1 is with H3PO4Mass percent be calculated as 110%~115%；Described in step 1
Inorganic stabilizers are CaCl2；Organic stabilizer described in step 1 is PVA.
2. a kind of preparation method of hard emulsified asphalt according to claim 1, which is characterized in that cream described in step 1
Agent is cationic emulsifier.
3. a kind of preparation method of hard emulsified asphalt according to claim 1, which is characterized in that nothing described in step 3
Machine acid is hydrochloric acid.
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| CN201610665261.4A CN106046820B (en) | 2016-08-12 | 2016-08-12 | A kind of preparation method of hard emulsified asphalt |
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| CN201610665261.4A CN106046820B (en) | 2016-08-12 | 2016-08-12 | A kind of preparation method of hard emulsified asphalt |
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