CN104211326A - Regenerated warm mix asphalt mixture and preparation method thereof - Google Patents
Regenerated warm mix asphalt mixture and preparation method thereof Download PDFInfo
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- CN104211326A CN104211326A CN201410424976.1A CN201410424976A CN104211326A CN 104211326 A CN104211326 A CN 104211326A CN 201410424976 A CN201410424976 A CN 201410424976A CN 104211326 A CN104211326 A CN 104211326A
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Abstract
The invention discloses a regenerated warm mix asphalt mixture which is formed by mixing regenerated warm mix asphalt, new mineral aggregates and an old asphalt mixture, wherein the regenerated warm mix asphalt is formed by mixing asphalt with a compound warm-mixing regenerant. The compound warm-mixing regenerant is a composite material of a surfactant and oil regenerant. The invention further discloses a preparation method for the regenerated warm mix asphalt mixture. The preparation method comprises the step of uniformly mixing the regenerated warm mix asphalt with the old asphalt mixture. According to the invention, the compound warm-mixing regenerant is added into the asphalt to prepare the regenerated warm mix asphalt, and the regenerated warm mix asphalt is added into a mixture of the new mineral aggregates and the old asphalt mixture to form the regenerated warm mix asphalt mixture. The preparation method for the regenerated warm mix asphalt mixture is simple, lower in mixing temperature, and capable of reducing emission of a harmful gas, lowering the environmental pollution and enabling the mixing amount of the old asphalt mixture to reach 50%. And meanwhile, the prepared regenerated warm mix asphalt mixture has very good pavement performance.
Description
Technical field
The invention belongs to technical field of road engineering materials, be specifically related to a kind of warm mix reclaimed asphalt mixture and preparation method thereof.
Background technology
In recent years, the warm mix technology of pitch and asphalt and regeneration techniques, as the new technology of asphalt pavement construction, are more and more taken seriously.
The regeneration techniques of bituminous pavement, be by old asphalt pavement after the pretreatment technology of milling, recovery, screening, adopt corresponding regeneration techniques again to mix and stir into asphalt by a certain percentage with new asphalt pavement material, enable satisfied certain pavement performance and by the Technology of its surfacing again.Traditional Applied of Asphalt Pavement Recycle Technique is heat regeneration asphalt mixture technology mainly, and heat regeneration asphalt mixture technology bitumen regenerant is joined old asphalt mixture and carries out mixing and stirring regeneration with new pitch and mineral aggregate under being heated to the high temperature of 150 DEG C-180 DEG C.Hot in-place recycling can recover the use properties of aged asphalt, but old asphalt mixture secondary is seriously aging in regenerative process, causes the pavement performance of asphalt poor, regeneration aspect ratio low (within 20%).And cold recycled asphalt mixture pavement performance is poor, cannot use in High Grade Bitumen Pavement.
Warm-mixed asphalt pavement technique is by adding warm-mixing agent in pitch, reduce the high-temperature viscosity of pitch thus realize asphalt and can mix and stir at lower than 150 DEG C, and its pavement performance is not less than the pavement performance of hot-mix asphalt mixture.
At present, the warm mix of pitch and asphalt and regeneration comprehensive utilisation technology, namely warm mix regeneration asphalt and warm mix reclaimed asphalt mixture technology receive much concern, in order to can effectively asphalt pavement warm mixing technology organically be combined with regeneration techniques, be badly in need of a kind of novel compound warm mix regenerator of exploitation, for the compatibility issues of the compatibility and material that solve pitch and asphalt mixture warm-mixing technology and regeneration techniques, this will become the initiative technology realizing pavement material energy-conserving and environment-protective and reclamation of old material and utilize.
Publication No. is that the patent of invention of CN102795812A discloses a kind of warm mix reclaimed asphalt mixture, comprise: old asphalt mixture, pitch, newly gather materials, breeze, regenerator and warm-mixing agent, the inorganic silicon-aluminum hydrochlorate of warm-mixing agent to be water ratio be 18-23%, it is 1 part in pitch parts by weight, old asphalt mixture 3-8 part, 5-28 part of newly gathering materials, breeze 0.3-1 part, regenerator 0.006-0.05 part, warm-mixing agent 0.06-0.12 part.The warm mix reclaimed asphalt mixture of this invention takes full advantage of Bituminous concrete surface and building stones, and what reduce regeneration asphalt mixes and stirs temperature, but regenerator and warm-mixing agent add in order as two kinds of additives, makes the preparation method of warm mix reclaimed asphalt mixture complicated.
Summary of the invention
For solving problems of the prior art, the invention provides a kind of warm mix reclaimed asphalt mixture, mixed and stirred by warm mix regeneration asphalt, new mineral aggregate and old asphalt mixture and form, described warm mix regeneration asphalt is mixed and stirred by pitch and compound warm mix regenerator and forms.Described pitch is new pitch.Compound warm mix regenerator is added in pitch directly, once mix and stir and form warm mix regeneration asphalt, added to directly, once in new mineral aggregate and old asphalt mixture by warm mix regeneration asphalt to mix and stir again and form warm mix reclaimed asphalt mixture, wherein the volume of old asphalt mixture is 0-50%.Be 4.7-5.3% by the consumption of Bitumen Mix Design determination warm mix reclaimed asphalt mixture medium pitch agglutinate.Aged asphalt in old asphalt mixture accounts for the 4.7-5.3% of old asphalt mixture.
At traditional Asphalt Pavement Construction Technique, warm mix asphalt technologies and Recycling Old Asphalt Mixture technology are separated, and cause consuming a large amount of fuel in old asphalt mixture regenerative process and regeneration aspect ratio low, the present invention by adding a kind of compound warm mix regenerator having Bituminous concrete surface regeneration and pitch warm mix dual-use function concurrently in pitch, mix and stir and make warm mix regeneration asphalt, this compound warm mix regenerator is a kind of matrix material, can be directly, added to once in pitch, again warm mix regeneration asphalt and new mineral aggregate and old asphalt mixture are mixed and stirred, thus realize the warm mix of pitch and the regeneration of old asphalt mixture.
Preferably, described compound warm mix regenerator is the matrix material of warm-mixing agent and regenerator.
Warm-mixing agent organically combines with regenerator by described compound warm mix regenerator, can realize pitch and asphalt mixes and stirs the reduction of temperature and the regeneration of old asphalt mixture.Warm-mixing agent in this compound warm mix regenerator can reduce the high-temperature viscosity of pitch, thus realize pitch and asphalt can mix and stir at 100-140 DEG C, and then reduce pitch and the short ageing of asphalt in construction process, improve the mixing and stirring of asphalt, consolidation effect, realize energy-saving and emission-reduction simultaneously and extend work-ing life of road.Regenerator in this compound warm mix regenerator can realize the regeneration of old asphalt mixture, and its volume can reach 50%, and the utilization ratio of old material significantly improves, and then realizes the exploitation of solid waste recycling and minimizing novel material, preserves the ecological environment.
At present, what generally adopt is warm-mixing agent and regenerator are added in pitch respectively to use, the two plays respective effect respectively, and warm-mixing agent and regenerator combine by the present invention, form a kind of matrix material, i.e. compound warm mix regenerator, in use, directly, once come into operation by compound warm mix regenerator, play mass action, effect is better.
Compound warm mix regenerator is sticky state, atrament at normal temperatures.Compound warm mix regenerator need be positioned in the aluminium vessel of sealing to be preserved, be suitable for preserving for a long time at the temperature of 15-40 DEG C, be not suitable for preserving at too high or too low temperature, otherwise the performance of compound warm mix regenerator can be reduced, affect the performance of its warm mix and refresh function.
In above-mentioned either a program preferably, described warm-mixing agent is tensio-active agent, and described regenerator is oil content regenerator.Tensio-active agent is liquid, transparent, yellow substance at normal temperatures, and it, as the material realizing pitch warm mix in compound warm mix regenerator, has good mobility at normal temperatures.Oil content regenerator is sticky liquid state, dark yellow material at normal temperatures, and it is as the material realizing Bituminous concrete surface regeneration in compound warm mix regenerator.
In above-mentioned either a program preferably, described tensio-active agent be that glycerin fatty acid ester, lipid acid sorb are smooth, one or several in polysorbate, sucrose ester.The chemical stability of this type of tensio-active agent is better, high temperature resistant better with high voltage performance, is applicable to pitch warm mix and uses.
In above-mentioned either a program preferably, one or several in extraction oil when described oil content regenerator is bright stock, lubricating oil, machine oil, heavy oil.The mineral oil that the oil content regenerator that the present invention uses is low-viscosity petroleum, it is cheap, easily obtains, and even can use the waste material of various oil plant, turn waste into wealth, greatly save cost.
Warm mix reclaimed asphalt mixture of the present invention takes full advantage of old asphalt mixture, the volume of old asphalt mixture can reach 50%, warm-mixing agent and regenerator combine by compound warm mix regenerator wherein, form matrix material, can add in pitch directly, once, form warm mix regeneration asphalt, again warm mix regeneration asphalt and new mineral aggregate and old asphalt mixture are mixed and stirred, given full play to the mass action of compound warm mix regenerator, the warm mix reclaimed asphalt mixture prepared thus has good pavement performance.The present invention can realize the warm mix of pitch and the regeneration of old asphalt mixture, and then the solid waste realizing ground surface material utilizes and the double effects of energy-saving and emission-reduction.
The present invention also provides a kind of preparation method of above-mentioned warm mix reclaimed asphalt mixture, comprises the following steps:
(1) warm mix regeneration asphalt is prepared;
(2) warm mix regeneration asphalt and new mineral aggregate and old asphalt mixture are mixed and stirred at a certain temperature;
Described warm mix regeneration asphalt is mixed and stirred by pitch and compound warm mix regenerator and forms.Described pitch is new pitch.
Preferably, the temperature of mixing and stirring of described warm mix regeneration asphalt and new mineral aggregate and old asphalt mixture is 100-140 DEG C.
In above-mentioned either a program preferably, the temperature of mixing and stirring of described warm mix regeneration asphalt and new mineral aggregate and old asphalt mixture is 110-130 DEG C.
Traditional heated tool butt-welding asphalt, that pitch and asphalt and regenerator are mixed and stirred under the high temperature of 150-180 DEG C, temperature can cause secondary aging, regeneration ratio is lower, and the pavement performance of pitch also can be had a strong impact on, in addition, pitch and asphalt mixture heating are to so high temperature, consume a large amount of fuel oils, side by side the obnoxious flavour of amplification quantity, serious environmental pollution can be caused.The preparation method of warm mix reclaimed asphalt mixture of the present invention, 100-140 DEG C can be reduced to by mixing and stirring temperature, this not only decrease obnoxious flavour discharge, reduce costs, and prepared warm mix reclaimed asphalt mixture has good pavement performance, and be not less than the pavement performance of heated tool butt-welding asphalt.
In above-mentioned either a program preferably, the mixing time of described warm mix regeneration asphalt and new mineral aggregate and old asphalt mixture is 80-100s.The present invention is through experimental results demonstrate, within this mixing time, warm mix regeneration asphalt and new mineral aggregate and old asphalt mixture can fully merge evenly.
In above-mentioned either a program preferably, the mixing time of described warm mix regeneration asphalt and new mineral aggregate and old asphalt mixture is 90s.
In above-mentioned either a program preferably, the preparation method of described warm mix regeneration asphalt comprises the following steps:
(1) by asphalt heating to mixing and stirring temperature;
(2) compound warm mix regenerator is added in the pitch being heated to mix and stir temperature mix and stir.
In above-mentioned either a program preferably, mixing and stirring temperature described in is 100-140 DEG C.Described pitch is new pitch.
In above-mentioned either a program preferably, the mixing time of described compound warm mix regenerator and pitch is 120-180s.The present invention is through experimental results demonstrate, within this mixing time, compound warm mix regenerator and pitch can fully merge evenly.
In above-mentioned either a program preferably, the preparation method of described compound warm mix regenerator comprises the following steps:
(1) tensio-active agent and oil content regenerator are taken according to a certain percentage;
(2) mix and stir in tensio-active agent and oil content regenerator loading mixing apparatus.
In above-mentioned either a program preferably, described tensio-active agent and described oil content regenerator mix and stir rear formation matrix material, and this matrix material is compound warm mix regenerator.
The synthesis ratio of tensio-active agent and oil content regenerator is P
tensio-active agent: P
oil content regenerator,
In formula, P
tensio-active agentthe interpolation quality of-tensio-active agent, g;
P
oil content regeneratorthe interpolation quality of-oil content regenerator, g.
The calculating formula of the interpolation quality of tensio-active agent is P
tensio-active agent=(P
1+ P
2) × A,
In formula, P
1the quality of new pitch in-bituminous cements, g;
P
2the quality of aged asphalt in-bituminous cements, g;
The interpolation quality of A-tensio-active agent accounts for the per-cent of bituminous cements total mass, %.
The calculating formula of the interpolation quality of oil content regenerator is P
oil content regenerator=P
2× B,
In formula, P
2the quality of aged asphalt in-bituminous cements, g;
The interpolation quality of B-oil content regenerator accounts for the per-cent of aged asphalt quality in bituminous cements, and %, B test by the degree of aging of aged asphalt and the grade of target pitch and determine.
The interpolation quality of tensio-active agent is the 0.3-0.6% of bituminous cements total mass, preferably 0.5%.
The interpolation quality of oil content regenerator is the 6.0-12.0% of aged asphalt quality in bituminous cements, preferably 8.5%.
In above-mentioned either a program preferably, described tensio-active agent be that glycerin fatty acid ester, lipid acid sorb are smooth, one or several in polysorbate, sucrose ester.
In above-mentioned either a program preferably, one or several in extraction oil when described oil content regenerator is bright stock, lubricating oil, machine oil, heavy oil.
In above-mentioned either a program preferably, the temperature of mixing and stirring of described tensio-active agent and described oil content regenerator is 40-60 DEG C.The present invention is through experimental results demonstrate, at the temperature of 40-60 DEG C, tensio-active agent and oil content regenerator are all in free-pouring state, good fluidity, is conducive to the two fully mixing, and evenly, the compound warm mix regenerator of preparation is liquid, has good mobility.When temperature drops to normal temperature, compound warm mix regenerator becomes sticky state, due at the temperature of 40-60 DEG C, tensio-active agent fully mixes with oil content regenerator, so although the compound warm mix regenerator under normal temperature presents sticky state, but very even, fine and smooth, there is no the particulate material of size inequality.
In above-mentioned either a program preferably, the mixing time of described tensio-active agent and described oil content regenerator is 90-150s.The present invention is through experimental results demonstrate, within this mixing time, two kinds of materials can fully merge evenly.Preferably, 120s.
Tensio-active agent and oil content regenerator need fully to stir in mixing apparatus.Mixing apparatus can adopt agitator, and agitator needs high speed rotating, two materials is fully stirred, merges evenly.Optimum revolution is 30 turns/min.
The preparation method of compound warm mix regenerator of the present invention is simple, preparation time is short, cost is low, preparation process is pollution-free, can not damage environment and the person.Surfactant and oil content regenerator organically combine by the present invention, pitch can be realized and asphalt mixes and stirs the reduction of temperature and the regeneration of old asphalt mixture, simultaneously the manufacture process of compound warm mix regenerator of the present invention is pollution-free, fundamentally solves because traditional pitch and asphalt mix and stir the low and problem such as the environmental pollution that causes and the wasting of resources of high, the old material utilization ratio of temperature.
The preparation method of warm mix regeneration asphalt of the present invention is simple, add compound warm mix regenerator in pitch uniform mixing directly, once, mix and stir temperature significantly to reduce, this not only decrease obnoxious flavour discharge, reduce costs, and it has good pavement performance.
The preparation method of warm mix reclaimed asphalt mixture of the present invention is simple, the warm mix regeneration asphalt of compound warm mix regenerator and new mineral aggregate and old asphalt mixture uniform mixing will be with the addition of, mix and stir temperature significantly to reduce, greatly reduce the discharge of obnoxious flavour, reduce costs, the utilization ratio of old asphalt mixture significantly improves, and the volume of old asphalt mixture can reach 50%, and the warm mix reclaimed asphalt mixture simultaneously has good pavement performance.
Embodiment
In order to further understand summary of the invention of the present invention, elaborate the present invention below in conjunction with specific embodiment.
Embodiment one:
A kind of warm mix reclaimed asphalt mixture, mixed and stirred by warm mix regeneration asphalt, new mineral aggregate and old asphalt mixture and form, described warm mix regeneration asphalt is mixed and stirred by pitch and compound warm mix regenerator and forms.Described pitch is new pitch.
Preparation 2 × 10
5g warm mix reclaimed asphalt mixture.The volume of old asphalt mixture is 30%, namely 6 × 10
4g, wherein aged asphalt accounts for 5.0%, i.e. the quality P of aged asphalt
2=3000g.Be 4.8% by the consumption of Bitumen Mix Design determination warm mix reclaimed asphalt mixture medium pitch agglutinate, namely the quality of bituminous cements is 9600g.Bituminous cements comprises new pitch and aged asphalt, the quality P of new pitch
1=9600-3000=6600g.
Compound warm mix regenerator comprises tensio-active agent and oil content regenerator.Tensio-active agent is glycerin fatty acid ester, is yellow, transparent, fluent meterial under normal temperature; Extraction oil when oil content regenerator is bright stock is dark yellow, sticky fluent meterial under normal temperature.
Prepare above-mentioned compound warm mix regenerator, comprise the following steps:
(1) extraction oil when glycerin fatty acid ester and bright stock is taken according to a certain percentage.
The addition of glycerin fatty acid ester is 0.5% of bituminous cements quality, i.e. P
glycerin fatty acid ester=(P
1+ P
2) × A=9600 × 0.5%=48g; When experiment records the pitch that aged asphalt is regenerated to new pitch same levels, the addition of oil content regenerator is 8.5% of aged asphalt quality, i.e. P
extract oil out=P
2× B=3000 × 8.5%=255g, so glycerin fatty acid ester is 1:5.3 with extracting oily ratio out.
(2) undertaken mixing and stirring to uniform state by extraction oil loading agitator when glycerin fatty acid ester and bright stock.
The rotating speed of agitator is 30 turns/min, and mixing and stirring temperature is 40 DEG C, and the mixing time is 150s, makes glycerin fatty acid ester fully stir with extraction oil, merge evenly.The compound warm mix regenerator of preparation is the material of black, sticky state at normal temperatures, and its performance as shown in Table 1.
Prepare above-mentioned warm mix regeneration asphalt, comprise the following steps:
(1) mix and stir temperature by above-mentioned asphalt heating to 120 DEG C, make it be in flow state.
(2) directly added in the pitch being heated to 120 DEG C by the compound warm mix regenerator of above-mentioned preparation and mix and stir rapidly to uniform state, the mixing time is 150s.
The performance of the warm mix regeneration asphalt of preparation as shown in Table 2.
Prepare above-mentioned warm mix reclaimed asphalt mixture: the above-mentioned warm mix regeneration asphalt that prepared and new mineral aggregate and old asphalt mixture are mixed and stirred, mixing and stirring temperature is 120 DEG C, and the mixing time is 100s, uniform mixing.As shown in Table 3, pavement performance as shown in Table 4 for the compaction capacity of the warm mix reclaimed asphalt mixture of preparation.
Embodiment two:
A kind of warm mix reclaimed asphalt mixture, mixed and stirred by warm mix regeneration asphalt, new mineral aggregate and old asphalt mixture and form, described warm mix regeneration asphalt is mixed and stirred by pitch and compound warm mix regenerator and forms.Described pitch is new pitch.
Preparation 2 × 10
5g warm mix reclaimed asphalt mixture.The volume of old asphalt mixture is 10%, namely 2 × 10
4g, wherein aged asphalt accounts for 5.3%, i.e. the quality P of aged asphalt
2=1060g.Be 4.7% by the consumption of Bitumen Mix Design determination warm mix reclaimed asphalt mixture medium pitch agglutinate, namely the quality of bituminous cements is 9400g.Bituminous cements comprises new pitch and aged asphalt, the quality P of new pitch
1=9400-1060=8340g.
Compound warm mix regenerator comprises tensio-active agent and oil content regenerator.Tensio-active agent is that lipid acid sorb is smooth, is yellow, transparent, fluent meterial under normal temperature; Oil content regenerator is lubricating oil, is dark yellow, sticky fluent meterial under normal temperature.
Prepare above-mentioned compound warm mix regenerator, comprise the following steps:
(1) take smooth for lipid acid sorb according to a certain percentage with lubricating oil.
The smooth addition of lipid acid sorb is 0.3% of bituminous cements quality, i.e. P
lipid acid sorb is smooth=(P
1+ P
2) × A=9400 × 0.3%=28.2g; When experiment records the pitch that aged asphalt is regenerated to new pitch same levels, the addition of oil content regenerator is 10% of aged asphalt quality, i.e. P
lubricating oil=P
2× B=1060 × 10%=106g, so lipid acid sorb is smooth is 1:3.8 with the ratio of lubricating oil.
(2) undertaken mixing and stirring to uniform state by smooth for lipid acid sorb and lubricating oil loading agitator.
The rotating speed of agitator is 30 turns/min, and mixing and stirring temperature is 60 DEG C, and the mixing time is 90s, lipid acid sorb is smoothly fully stirred with lubricating oil, merges evenly.The compound warm mix regenerator of preparation is the material of black, sticky state at normal temperatures, and its performance as shown in Table 1.
Prepare above-mentioned warm mix regeneration asphalt, comprise the following steps:
(1) mix and stir temperature by above-mentioned asphalt heating to 100 DEG C, make it be in flow state.
(2) directly added in the pitch being heated to 100 DEG C by the compound warm mix regenerator of above-mentioned preparation and mix and stir rapidly to uniform state, the mixing time is 180s.
The performance of the warm mix regeneration asphalt of preparation as shown in Table 2.
Prepare above-mentioned warm mix reclaimed asphalt mixture: the above-mentioned warm mix regeneration asphalt that prepared and new mineral aggregate and old asphalt mixture are mixed and stirred, mixing and stirring temperature is 130 DEG C, and the mixing time is 90s, uniform mixing.As shown in Table 3, pavement performance as shown in Table 4 for the compaction capacity of the warm mix reclaimed asphalt mixture of preparation.
Embodiment three:
A kind of warm mix reclaimed asphalt mixture, mixed and stirred by warm mix regeneration asphalt, new mineral aggregate and old asphalt mixture and form, described warm mix regeneration asphalt is mixed and stirred by pitch and compound warm mix regenerator and forms.Described pitch is new pitch.
Preparation 2 × 10
5g warm mix reclaimed asphalt mixture.The volume of old asphalt mixture is 50%, namely 1 × 10
5g, wherein aged asphalt accounts for 4.7%, i.e. the quality P of aged asphalt
2=4700g.Be 5.0% by the consumption of Bitumen Mix Design determination warm mix reclaimed asphalt mixture medium pitch agglutinate, namely the quality of bituminous cements is 10000g.Bituminous cements comprises new pitch and aged asphalt, the quality P of new pitch
1=10000-4700=5300g.
Compound warm mix regenerator comprises tensio-active agent and oil content regenerator.Tensio-active agent is polysorbate, is yellow, transparent, fluent meterial under normal temperature; Oil content regenerator is machine oil, is dark yellow, sticky fluent meterial under normal temperature.
Prepare above-mentioned compound warm mix regenerator, comprise the following steps:
(1) polysorbate and machine oil are taken according to a certain percentage.
The addition of polysorbate is 0.6% of bituminous cements quality, i.e. P
polysorbate=(P
1+ P
2) × A=10000 × 0.6%=60g; When experiment records the pitch that aged asphalt is regenerated to new pitch same levels, the addition of oil content regenerator is 6.0% of aged asphalt quality, i.e. P
machine oil=P
2× B=4700 × 6.0%=282g, so the ratio of polysorbate and machine oil is 1:4.7.
(2) undertaken mixing and stirring to uniform state by polysorbate and machine oil loading agitator.
The rotating speed of agitator is 30 turns/min, and mixing and stirring temperature is 50 DEG C, and the mixing time is 120s, polysorbate and machine oil is fully stirred, merges evenly.The compound warm mix regenerator of preparation is the material of black, sticky state at normal temperatures, and its performance as shown in Table 1.
Prepare above-mentioned warm mix regeneration asphalt, comprise the following steps:
(1) mix and stir temperature by above-mentioned asphalt heating to 140 DEG C, make it be in flow state.
(2) directly added in the pitch being heated to 140 DEG C by the compound warm mix regenerator of above-mentioned preparation and mix and stir rapidly to uniform state, the mixing time is 120s.
The performance of the warm mix regeneration asphalt of preparation as shown in Table 2.
Prepare above-mentioned warm mix reclaimed asphalt mixture: the above-mentioned warm mix regeneration asphalt that prepared and new mineral aggregate and old asphalt mixture are mixed and stirred, mixing and stirring temperature is 100 DEG C, and the mixing time is 95s, uniform mixing.As shown in Table 3, pavement performance as shown in Table 4 for the compaction capacity of the warm mix reclaimed asphalt mixture of preparation.
Embodiment four:
A kind of warm mix reclaimed asphalt mixture, mixed and stirred by warm mix regeneration asphalt, new mineral aggregate and old asphalt mixture and form, described warm mix regeneration asphalt is mixed and stirred by pitch and compound warm mix regenerator and forms.Described pitch is new pitch.
Preparation 2 × 10
5g warm mix reclaimed asphalt mixture.The volume of old asphalt mixture is 40%, namely 8 × 10
4g, wherein aged asphalt accounts for 4.8%, i.e. the quality P of aged asphalt
2=3840g.Be 5.1% by the consumption of Bitumen Mix Design determination warm mix reclaimed asphalt mixture medium pitch agglutinate, namely the quality of bituminous cements is 10200g.Bituminous cements comprises new pitch and aged asphalt, the quality P of new pitch
1=10200-3840=6360g.
Compound warm mix regenerator comprises tensio-active agent and oil content regenerator.Tensio-active agent is glycerin fatty acid ester and polysorbate, is yellow, transparent, fluent meterial under normal temperature; Oil content regenerator is heavy oil and lubricating oil, is dark yellow, sticky fluent meterial under normal temperature.
Prepare above-mentioned compound warm mix regenerator, comprise the following steps:
(1) glycerin fatty acid ester and the mixture of polysorbate and the mixture of heavy oil and lubricating oil are taken according to a certain percentage.
The addition of glycerin fatty acid ester and polysorbate is 0.4% of bituminous cements quality, i.e. P
glycerin fatty acid ester+poly-sorb is smooth=(P
1+ P
2) × A=10200 × 0.4%=40.8g; When experiment records the pitch that aged asphalt is regenerated to new pitch same levels, the addition of oil content regenerator is 7.0% of aged asphalt quality, i.e. P
heavy oil+lubricating oil=P
2× B=3840 × 7.0%=268.8g, so the ratio of the mixture of the mixture of glycerin fatty acid ester and polysorbate and heavy oil and lubricating oil is 1:6.6.
(2) glycerin fatty acid ester and the mixture of polysorbate and the mixture of heavy oil and lubricating oil are loaded in agitator carry out mixing and stirring to uniform state.
The rotating speed of agitator is 30 turns/min, and mixing and stirring temperature is 55 DEG C, and the mixing time is 110s, glycerin fatty acid ester and polysorbate and heavy oil and lubricating oil is fully stirred, merges evenly.The compound warm mix regenerator of preparation is the material of black, sticky state at normal temperatures, and its performance as shown in Table 1.
Prepare above-mentioned warm mix regeneration asphalt, comprise the following steps:
(1) mix and stir temperature by above-mentioned asphalt heating to 130 DEG C, make it be in flow state.
(2) directly added in the pitch being heated to 130 DEG C by the compound warm mix regenerator of above-mentioned preparation and mix and stir rapidly to uniform state, the mixing time is 130s.
The performance of the warm mix regeneration asphalt of preparation as shown in Table 2.
Prepare above-mentioned warm mix reclaimed asphalt mixture: the above-mentioned warm mix regeneration asphalt that prepared and new mineral aggregate and old asphalt mixture are mixed and stirred, mixing and stirring temperature is 140 DEG C, and the mixing time is 80s, uniform mixing.As shown in Table 3, pavement performance as shown in Table 4 for the compaction capacity of the warm mix reclaimed asphalt mixture of preparation.
Embodiment five:
A kind of warm mix reclaimed asphalt mixture, mixed and stirred by warm mix regeneration asphalt, new mineral aggregate and old asphalt mixture and form, described warm mix regeneration asphalt is mixed and stirred by pitch and compound warm mix regenerator and forms.Described pitch is new pitch.
Preparation 2 × 10
5g warm mix reclaimed asphalt mixture.The volume of old asphalt mixture is 20%, namely 4 × 10
4g, wherein aged asphalt accounts for 5.1%, i.e. the quality P of aged asphalt
2=2040g.Be 5.3% by the consumption of Bitumen Mix Design determination warm mix reclaimed asphalt mixture medium pitch agglutinate, namely the quality of bituminous cements is 10600g.Bituminous cements comprises new pitch and aged asphalt, the quality P of new pitch
1=10600-2040=8560g.
Compound warm mix regenerator comprises tensio-active agent and oil content regenerator.Tensio-active agent is polysorbate, is yellow, transparent, fluent meterial under normal temperature; Oil content regenerator is heavy oil, is dark yellow, sticky fluent meterial under normal temperature.
Prepare above-mentioned compound warm mix regenerator, comprise the following steps:
(1) polysorbate and heavy oil are taken according to a certain percentage.
The addition of polysorbate is 0.35% of bituminous cements quality, i.e. P
polysorbate=(P
1+ P
2) × A=10600 × 0.35%=37.1g; When experiment records the pitch that aged asphalt is regenerated to new pitch same levels, the addition of oil content regenerator is 8.0% of aged asphalt quality, i.e. P
heavy oil=P
2× B=2040 × 8.0%=163.2g, so the ratio of polysorbate and heavy oil is 1:4.4.
(2) undertaken mixing and stirring to uniform state by polysorbate and heavy oil loading agitator.
The rotating speed of agitator is 30 turns/min, and mixing and stirring temperature is 45 DEG C, and the mixing time is 130s, polysorbate and heavy oil is fully stirred, merges evenly.The compound warm mix regenerator of preparation is the material of black, sticky state at normal temperatures, and its performance as shown in Table 1.
Prepare above-mentioned warm mix regeneration asphalt, comprise the following steps:
(1) mix and stir temperature by above-mentioned asphalt heating to 110 DEG C, make it be in flow state.
(2) directly added in the pitch being heated to 110 DEG C by the compound warm mix regenerator of above-mentioned preparation and mix and stir rapidly to uniform state, the mixing time is 170s.
The performance of the warm mix regeneration asphalt of preparation as shown in Table 2.
Prepare above-mentioned warm mix reclaimed asphalt mixture: the above-mentioned warm mix regeneration asphalt that prepared and new mineral aggregate and old asphalt mixture are mixed and stirred, mixing and stirring temperature is 110 DEG C, and the mixing time is 85s, uniform mixing.As shown in Table 3, pavement performance as shown in Table 4 for the compaction capacity of the warm mix reclaimed asphalt mixture of preparation.
Embodiment six:
A kind of warm mix reclaimed asphalt mixture, identical with embodiment one, unlike:
Preparation 2 × 10
5g warm mix reclaimed asphalt mixture.The volume of old asphalt mixture is 45%, namely 9 × 10
4g, wherein aged asphalt accounts for 4.9%, i.e. the quality P of aged asphalt
2=4410g.Be 5.2% by the consumption of Bitumen Mix Design determination warm mix reclaimed asphalt mixture medium pitch agglutinate, namely the quality of bituminous cements is 10400g.Bituminous cements comprises new pitch and aged asphalt, the quality P of new pitch
1=10400-4410=5990g.
When preparing compound warm mix regenerator, the addition of glycerin fatty acid ester is 0.45% of bituminous cements quality, i.e. P
glycerin fatty acid ester=(P
1+ P
2) × A=10400 × 0.45%=46.8g; When experiment records the pitch that aged asphalt is regenerated to new pitch same levels, the addition of oil content regenerator is 6.5% of aged asphalt quality, i.e. P
extract oil out=P
2× B=4410 × 6.5%=286.65g, so glycerin fatty acid ester is 1:6.1 with extracting oily ratio out.Glycerin fatty acid ester is 52 DEG C with extracting oily temperature of mixing and stirring out, and the mixing time is 100s.
When preparing warm mix regeneration asphalt, asphalt heating to 115 DEG C mix and stir temperature, compound warm mix regenerator directly adds in pitch, mixes and stirs 140s.
When preparing warm mix reclaimed asphalt mixture, the temperature of mixing and stirring of warm mix regeneration asphalt and new mineral aggregate and old asphalt mixture is 125 DEG C, and the mixing time is 90s.
Embodiment seven:
A kind of warm mix reclaimed asphalt mixture, identical with embodiment one, unlike:
Preparation 2 × 10
5g warm mix reclaimed asphalt mixture.The volume of old asphalt mixture is 35%, namely 7 × 10
4g, wherein aged asphalt accounts for 5.2%, i.e. the quality P of aged asphalt
2=3640g.Be 4.9% by the consumption of Bitumen Mix Design determination warm mix reclaimed asphalt mixture medium pitch agglutinate, namely the quality of bituminous cements is 9800g.Bituminous cements comprises new pitch and aged asphalt, the quality P of new pitch
1=9800-3640=6160g.
When preparing compound warm mix regenerator, the addition of glycerin fatty acid ester is 0.4% of bituminous cements quality, i.e. P
glycerin fatty acid ester=(P
1+ P
2) × A=9800 × 0.4%=39.2g; When experiment records the pitch that aged asphalt is regenerated to new pitch same levels, the addition of oil content regenerator is 7.5% of aged asphalt quality, i.e. P
extract oil out=P
2× B=3640 × 7.5%=273g, so glycerin fatty acid ester is 1:7.0 with extracting oily ratio out.Glycerin fatty acid ester is 48 DEG C with extracting oily temperature of mixing and stirring out, and the mixing time is 140s.
When preparing warm mix regeneration asphalt, asphalt heating to 105 DEG C mix and stir temperature, compound warm mix regenerator directly adds in pitch, mixes and stirs 160s.
When preparing warm mix reclaimed asphalt mixture, the temperature of mixing and stirring of warm mix regeneration asphalt and new mineral aggregate and old asphalt mixture is 115 DEG C, and the mixing time is 93s.
Embodiment eight:
A kind of warm mix reclaimed asphalt mixture, identical with embodiment one, unlike:
Preparation 2 × 10
5g warm mix reclaimed asphalt mixture.The volume of old asphalt mixture is 25%, namely 5 × 10
4g, wherein aged asphalt accounts for 5.0%, i.e. the quality P of aged asphalt
2=2500g.Be 5.0% by the consumption of Bitumen Mix Design determination warm mix reclaimed asphalt mixture medium pitch agglutinate, namely the quality of bituminous cements is 10000g.Bituminous cements comprises new pitch and aged asphalt, the quality P of new pitch
1=10000-2500=7500g.
When preparing compound warm mix regenerator, the addition of glycerin fatty acid ester is 0.33% of bituminous cements quality, i.e. P
glycerin fatty acid ester=(P
1+ P
2) × A=10000 × 0.33%=33g; When experiment records the pitch that aged asphalt is regenerated to new pitch same levels, the addition of oil content regenerator is 8.8% of aged asphalt quality, i.e. P
extract oil out=P
2× B=2500 × 8.8%=220g, so glycerin fatty acid ester is 1:6.7 with extracting oily ratio out.Glycerin fatty acid ester is 58 DEG C with extracting oily temperature of mixing and stirring out, and the mixing time is 125s.
When preparing warm mix regeneration asphalt, asphalt heating to 125 DEG C mix and stir temperature, compound warm mix regenerator directly adds in pitch, mixes and stirs 155s.
When preparing warm mix reclaimed asphalt mixture, the temperature of mixing and stirring of warm mix regeneration asphalt and new mineral aggregate and old asphalt mixture is 105 DEG C, and the mixing time is 100s.
Embodiment nine:
A kind of warm mix reclaimed asphalt mixture, identical with embodiment one, unlike:
Preparation 2 × 10
5g warm mix reclaimed asphalt mixture.The volume of old asphalt mixture is 50%, namely 1 × 10
5g, wherein aged asphalt accounts for 5.0%, i.e. the quality P of aged asphalt
2=5000g.Be 4.8% by the consumption of Bitumen Mix Design determination warm mix reclaimed asphalt mixture medium pitch agglutinate, namely the quality of bituminous cements is 9600g.Bituminous cements comprises new pitch and aged asphalt, the quality P of new pitch
1=9600-5000=4600g.
When preparing compound warm mix regenerator, the addition of glycerin fatty acid ester is 0.55% of bituminous cements quality, i.e. P
glycerin fatty acid ester=(P
1+ P
2) × A=9600 × 0.55%=52.8g; When experiment records the pitch that aged asphalt is regenerated to new pitch same levels, the addition of oil content regenerator is 8.0% of aged asphalt quality, i.e. P
extract oil out=P
2× B=5000 × 8.0%=400g, so glycerin fatty acid ester is 1:7.6 with extracting oily ratio out.Glycerin fatty acid ester is 43 DEG C with extracting oily temperature of mixing and stirring out, and the mixing time is 135s.
When preparing warm mix regeneration asphalt, asphalt heating to 135 DEG C mix and stir temperature, compound warm mix regenerator directly adds in pitch, mixes and stirs 135s.
When preparing warm mix reclaimed asphalt mixture, the temperature of mixing and stirring of warm mix regeneration asphalt and new mineral aggregate and old asphalt mixture is 135 DEG C, and the mixing time is 90s.
Embodiment ten:
A kind of warm mix reclaimed asphalt mixture, identical with embodiment one, unlike:
Preparation 2 × 10
5g warm mix reclaimed asphalt mixture.The volume of old asphalt mixture is 48%, namely 9.6 × 10
4g, wherein aged asphalt accounts for 5.0%, i.e. the quality P of aged asphalt
2=4800g.Be 5.0% by the consumption of Bitumen Mix Design determination warm mix reclaimed asphalt mixture medium pitch agglutinate, namely the quality of bituminous cements is 10000g.Bituminous cements comprises new pitch and aged asphalt, the quality P of new pitch
1=10000-4800=5200g.
When preparing compound warm mix regenerator, the addition of glycerin fatty acid ester is 0.55% of bituminous cements quality, i.e. P
glycerin fatty acid ester=(P
1+ P
2) × A=10000 × 0.55%=55g; When experiment records the pitch that aged asphalt is regenerated to new pitch same levels, the addition of oil content regenerator is 6.8% of aged asphalt quality, i.e. P
extract oil out=P
2× B=4800 × 6.8%=326.4g, so glycerin fatty acid ester is 1:5.9 with extracting oily ratio out.Glycerin fatty acid ester is 50 DEG C with extracting oily temperature of mixing and stirring out, and the mixing time is 120s.
When preparing warm mix regeneration asphalt, asphalt heating to 105 DEG C mix and stir temperature, compound warm mix regenerator directly adds in pitch, mixes and stirs 150s.
When preparing warm mix reclaimed asphalt mixture, the temperature of mixing and stirring of warm mix regeneration asphalt and new mineral aggregate and old asphalt mixture is 105 DEG C, and the mixing time is 90s.
Embodiment 11:
A kind of warm mix reclaimed asphalt mixture, identical with embodiment one, unlike:
Preparation 2 × 10
5g warm mix reclaimed asphalt mixture.The volume of old asphalt mixture is 38%, namely 7.6 × 10
4g, wherein aged asphalt accounts for 4.7%, i.e. the quality P of aged asphalt
2=3572g.Be 5.0% by the consumption of Bitumen Mix Design determination warm mix reclaimed asphalt mixture medium pitch agglutinate, namely the quality of bituminous cements is 10000g.Bituminous cements comprises new pitch and aged asphalt, the quality P of new pitch
1=10000-3572=6428g.
When preparing compound warm mix regenerator, the addition of glycerin fatty acid ester is 0.55% of bituminous cements quality, i.e. P
glycerin fatty acid ester=(P
1+ P
2) × A=10000 × 0.55%=55g; When experiment records the pitch that aged asphalt is regenerated to new pitch same levels, the addition of oil content regenerator is 8.2% of aged asphalt quality, i.e. P
extract oil out=P
2× B=3572 × 8.2%=292.9g, so glycerin fatty acid ester is 1:5.3 with extracting oily ratio out.Glycerin fatty acid ester is 50 DEG C with extracting oily temperature of mixing and stirring out, and the mixing time is 115s.
When preparing warm mix regeneration asphalt, asphalt heating to 115 DEG C mix and stir temperature, compound warm mix regenerator directly adds in pitch, mixes and stirs 145s.
When preparing warm mix reclaimed asphalt mixture, the temperature of mixing and stirring of warm mix regeneration asphalt and new mineral aggregate and old asphalt mixture is 115 DEG C, and the mixing time is 90s.
Embodiment 12:
A kind of warm mix reclaimed asphalt mixture, identical with embodiment one, unlike:
Preparation 2 × 10
5g warm mix reclaimed asphalt mixture.The volume of old asphalt mixture is 40%, namely 8 × 10
4g, wherein aged asphalt accounts for 4.8%, i.e. the quality P of aged asphalt
2=3840g.Be 5.0% by the consumption of Bitumen Mix Design determination warm mix reclaimed asphalt mixture medium pitch agglutinate, namely the quality of bituminous cements is 10000g.Bituminous cements comprises new pitch and aged asphalt, the quality P of new pitch
1=10000-3840=6160g.
When preparing compound warm mix regenerator, the addition of glycerin fatty acid ester is 0.6% of bituminous cements quality, i.e. P
glycerin fatty acid ester=(P
1+ P
2) × A=10000 × 0.6%=60g; When experiment records the pitch that aged asphalt is regenerated to new pitch same levels, the addition of oil content regenerator is 7.5% of aged asphalt quality, i.e. P
extract oil out=P
2× B=3840 × 7.5%=288g, so glycerin fatty acid ester is 1:4.8 with extracting oily ratio out.Glycerin fatty acid ester is 50 DEG C with extracting oily temperature of mixing and stirring out, and the mixing time is 115s.
When preparing warm mix regeneration asphalt, asphalt heating to 120 DEG C mix and stir temperature, compound warm mix regenerator directly adds in pitch, mixes and stirs 150s.
When preparing warm mix reclaimed asphalt mixture, the temperature of mixing and stirring of warm mix regeneration asphalt and new mineral aggregate and old asphalt mixture is 105 DEG C, and the mixing time is 100s.
Table one: the performance of compound warm mix regenerator
Table two: the performance of warm mix regeneration asphalt
Table three: AC-13 warm mix reclaimed asphalt mixture compaction capacity
Table four: AC-13 warm mix reclaimed asphalt mixture pavement performance
Those skilled in the art are understood that, warm mix reclaimed asphalt mixture of the present invention and preparation method thereof comprises the summary of the invention of the invention described above specification sheets and the arbitrary combination of embodiment, as space is limited and not have each scheme of these combination formations to describe one by one for making specification sheets simple and clear.Within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a warm mix reclaimed asphalt mixture, is mixed and stirred by warm mix regeneration asphalt, new mineral aggregate and old asphalt mixture and forms, it is characterized in that: described warm mix regeneration asphalt is mixed and stirred by pitch and compound warm mix regenerator and forms.
2. warm mix reclaimed asphalt mixture as claimed in claim 1, is characterized in that: described compound warm mix regenerator is the matrix material of warm-mixing agent and regenerator.
3. warm mix reclaimed asphalt mixture as claimed in claim 2, it is characterized in that: described warm-mixing agent is tensio-active agent, described regenerator is oil content regenerator.
4. warm mix reclaimed asphalt mixture as claimed in claim 3, is characterized in that: described tensio-active agent is that glycerin fatty acid ester, lipid acid sorb are smooth, one or several in polysorbate, sucrose ester.
5. warm mix reclaimed asphalt mixture as claimed in claim 3, is characterized in that: one or several in extraction oil when described oil content regenerator is bright stock, lubricating oil, machine oil, heavy oil.
6. a preparation method for warm mix reclaimed asphalt mixture, comprises the following steps:
(1) warm mix regeneration asphalt is prepared;
(2) warm mix regeneration asphalt and new mineral aggregate and old asphalt mixture are mixed and stirred at a certain temperature;
It is characterized in that: described warm mix regeneration asphalt is mixed and stirred by pitch and compound warm mix regenerator and forms.
7. the preparation method of warm mix reclaimed asphalt mixture as claimed in claim 6, is characterized in that: the temperature of mixing and stirring of described warm mix regeneration asphalt and new mineral aggregate and old asphalt mixture is 100-140 DEG C.
8. the preparation method of warm mix reclaimed asphalt mixture as claimed in claim 7, is characterized in that: the temperature of mixing and stirring of described warm mix regeneration asphalt and new mineral aggregate and old asphalt mixture is 110-130 DEG C.
9. the preparation method of warm mix reclaimed asphalt mixture as claimed in claim 6, is characterized in that: the mixing time of described warm mix regeneration asphalt and new mineral aggregate and old asphalt mixture is 80-100s.
10. the preparation method of warm mix reclaimed asphalt mixture as claimed in claim 9, is characterized in that: the mixing time of described warm mix regeneration asphalt and new mineral aggregate and old asphalt mixture is 90s.
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| CN105255206A (en) * | 2015-11-27 | 2016-01-20 | 长安大学 | Warm-mixed recycled asphalt and preparation method thereof |
| CN105293996A (en) * | 2015-11-27 | 2016-02-03 | 长安大学 | Warm-mixing recycled asphalt mixture preparation method |
| CN105837090A (en) * | 2016-03-24 | 2016-08-10 | 苏交科集团股份有限公司 | High-addition-amount plant-mixed warm regenerated asphalt mixture and preparation method thereof |
| CN108316094A (en) * | 2018-03-19 | 2018-07-24 | 六安市交通公路实业有限公司 | A kind of bituminous paving reclaimed materials and its warm mix regeneration technology |
| CN110054905A (en) * | 2019-04-30 | 2019-07-26 | 齐鲁交通发展集团有限公司 | Environment-friendly type pitch warm mix regenerative agent and environment-friendly type warm mix asphalt pavement regeneration mixture |
| CN110467825A (en) * | 2019-08-23 | 2019-11-19 | 武汉市市政建设集团有限公司 | A kind of Warm-Mix Bitumen Mixture and preparation method thereof containing reworked material |
| CN112062495A (en) * | 2020-09-17 | 2020-12-11 | 西南交通大学 | Warm-mix regenerant and preparation method of warm-mix regenerated asphalt |
| CN114426777A (en) * | 2020-10-10 | 2022-05-03 | 中国石油化工股份有限公司 | Hot-mixed asphalt regenerant and preparation method and application thereof |
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| CN112062495A (en) * | 2020-09-17 | 2020-12-11 | 西南交通大学 | Warm-mix regenerant and preparation method of warm-mix regenerated asphalt |
| CN114426777A (en) * | 2020-10-10 | 2022-05-03 | 中国石油化工股份有限公司 | Hot-mixed asphalt regenerant and preparation method and application thereof |
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