CN104559254A - Early-strength emulsion for cold regeneration of waste asphalt pavement and preparation method and application thereof - Google Patents
Early-strength emulsion for cold regeneration of waste asphalt pavement and preparation method and application thereof Download PDFInfo
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
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Abstract
The invention discloses an early-strength emulsion for the cold regeneration of a waste asphalt pavement and a preparation method and application thereof. The raw material component of the early-strength emulsion for the cold regeneration of the waste asphalt pavement is prepared from the following components in percentage by weight: 50%-65% of road petroleum asphalt, 1.0%-4.5% of an asphalt emulsifying agent, 0%-10% of a modifying agent, 0%-0.4% of an exciting agent, 0.01%-0.4% of a dispersing agent, 0.05%-2.0% of a stabilizer, 0%-0.5% of an auxiliary agent and the balance of water, wherein the auxiliary agent is used for regulating the pH value, and the modifying agent is cationic styrene-butadiene latex. The early-strength emulsion for the cold regeneration can be used for reducing the blended water usage amount of a cold regeneration mixture and accelerating the hydration of cement contained in the cold regeneration mixture, thereby enhancing the early strength of the cold regeneration mixture, shortening the curing time and enlarging the application range of the emulsified asphalt cold regeneration mixture.
Description
Technical field
The invention belongs to road engineering material field, be specifically related to a kind of early-strength type waste asphalt pavement cold renewal emulsion, its preparation method and application thereof.
Background technology
The waste asphalt mixture quantity that China produces every year nearly 1.6 hundred million tons, the discarded asphalt that quantity is so huge, if not being used, not only takies a large amount of soil, and contaminate environment.Therefore, scientific and efficient utilize waste asphalt mixture, to promotion resource circulation utilization and environment protection, the Sustainable development realizing bituminous pavement is significant.
Current asphalt regenerative mainly divides hot recycling and cold renewal.Although hot recycling pavement performance is better, it mixes and stirs at high temperature the environmental pollution weight that paves, and energy consumption is large, and the utilization ratio (20-30%) of waste asphalt mixture is lower simultaneously.Emulsified bitumen cold renewal mixes and stirs at normal temperature and constructs, and waste asphalt mixture utilization ratio (70%-90%) is high, has the advantage of energy saving standard, but the early strength deficiency of current Cold Recycled Mixture with Emulsified Asphalt seriously restricts it to be applied.
Cold renewal emulsion is the emulsion be suspended in by small pitch particle in water medium, when cold renewal emulsion and reworked material mix and stir, pitch particle formation asphalt membrane close to each other, but now pitch cohesive force is lower due to the existence of moisture content for asphalt membrane, so compound force of cohesion is also lower, cold renewal emulsion compound have to pass through emulsion with gather materials adhesion, decompose breakdown of emulsion, water evaporates after could recover original adhesive property completely.The strength development of cold renewal emulsion compound is slow, cold renewal layer must carry out health before overlay superstructure, conditioned time should not be less than 7d, need to suspend traffic for a long time, this is very large on traffic especially Urban traffic impact, while retaining asphalt environmental protection, the advantage such as energy-conservation, how overcome the deficiency of its early strength, be the important research direction in road engineering material field.
Chinese patent ZL00808923.X has invented a kind of high-early-strength cement and admixture and preparation method thereof, this invention can improve the early strength of cement, but need to add in cement pulverizing course, common short-term strength cement is used for the operable time that Cold Recycled Mixture with Emulsified Asphalt can affect compound, and is not suitable for Bituminous Pavement Cold Regeneration.
Chinese patent ZL200810150504.6 authorizes a kind of cold renewal reductive agent of waste asphalt mixture and prepares reductive agent methods and applications, although this invention cold renewal reductive agent excellent combination property, but solvent oil component is one or more in gasoline, kerosene, diesel oil, and this regenerator early strength does not have clear superiority.
The problem that the early strength of current cold renewal emulsion is low has started to be paid attention to, and the cold-regenerated road surface conditioned time length of prior art making has a strong impact on traffic and passes through, and constrains the propagation and employment of cold-regenerated road surface.Therefore, exploitation has the cold renewal emulsion of early-strength type to promoting that asphalt pavement regeneration utilization has great importance.
Summary of the invention
In order to solve the low technical barrier of prior art medium pitch road surface cold renewal early strength, the invention provides a kind of early-strength type waste asphalt pavement cold renewal emulsion, its preparation method and application thereof, early-strength type cold renewal emulsion in the present invention can reduce the mixing water amount in cold regeneration mix, accelerate the aquation of cement in cold regeneration mix, thus improve the early strength of cold regeneration mix, shorten conditioned time, expand the range of application of Cold Recycled Mixture with Emulsified Asphalt.
For solving the problems of the technologies described above, the invention of this reality adopts following technical scheme:
A kind of early-strength type waste asphalt pavement cold renewal emulsion, its feed composition is formulated by mass percentage by following component: bi tumenf orr oad: 50%-65%, asphalt emulsifier: 1.0%-4.5%, properties-correcting agent: 0%-10%, exciting agent: 0-0.4%, dispersion agent: 0.01%-0.4%, stablizer: 0.05%-2.0%, the auxiliary agent of adjust ph; The water of 0-0.5% and surplus; Described properties-correcting agent is positively charged ion styrene-butadiene latex; Described exciting agent is the mixture of one or more any proportionings in trolamine, diethanolamine, methyl alcohol, ethanol or tri-isopropanolamine.
Early-strength type Bituminous Pavement Cold Regeneration emulsion of the present invention, effectively shortens the conditioned time of cold regeneration mix.
In order to improve Bituminous Pavement Cold Regeneration early strength further, preferably, the penetration degree of described bi tumenf orr oad is 50-110.The unit of penetration degree is 0.1mm.
In order to ensure the performances such as gained emulsion intercalation method further, improve the synergistic effect with other component simultaneously, described asphalt emulsifier be positively charged ion split slowly or in split type.
In order to improve the dispersiveness of emulsion further, promote the synergistic effect between each component, described dispersion agent is Concrete superplastizer.
In order to improve Bituminous Pavement Cold Regeneration early strength further, preferably, Concrete superplastizer is the mixture of one or more any proportionings in lignin sulfonate, aliphatic category, naphthalenesulfonate or polycarboxylic acid.
In order to improve gained emulsion intercalation method further, described stablizer is the mixture of one or more any proportionings in sodium-chlor, ammonium chloride, Repone K, magnesium chloride, calcium chloride, polyvinyl alcohol or carboxymethyl cellulose; The auxiliary agent of described adjust ph is hydrochloric acid, sulfuric acid, nitric acid, formic acid, phenylformic acid, acetic acid, succinic acid or tartrate.
The preparation of above-mentioned strong type waste asphalt pavement cold renewal emulsion can refer to prior art, but is preferably prepared as follows:
The preparation method of early-strength type waste asphalt pavement cold renewal emulsion, is characterized in that: comprise the following steps that order connects:
A bi tumenf orr oad is heated to 120 DEG C-150 DEG C by ();
B () is jointly soluble in water by the auxiliary agent of asphalt emulsifier, properties-correcting agent, exciting agent, dispersion agent, stablizer and adjust ph, be prepared into soap lye and be heated to 40-70 DEG C, and adjust ph is between 1.5-3.0;
C step (b) gained soap lye is conveyed in colloidal mill and circulates by (), again step (a) gained bi tumenf orr oad is input in colloidal mill, through colloidal mill dispersed and grinding after, become emulsion oil-in-water, emulsion is exported colloidal mill, be cooled to room temperature, obtain final product.
The preferred 1-3min of above-mentioned steps (c) milling time.
Preferably, comprise the above-mentioned cold regeneration mix for early-strength type Bituminous Pavement Cold Regeneration emulsion, its feed composition comprises: bituminous pavement salvage material 50-99 part, new mineral aggregate 0-50 part, ordinary Portland cement 0.5-4 part, breeze 0-4 part, early-strength type waste asphalt pavement cold renewal are with emulsion 2-5 part and water 0-5 part, and described number is mass fraction;
The preparation of above-mentioned cold regeneration mix comprises the steps:
(a) according to cold regeneration mix grating, by bituminous pavement salvage material, new mineral aggregate, ordinary Portland cement and breeze mix 5-30s in agitator kettle;
B () adds water in the mixture of step (a) gained, mix 5-60s;
C () adds early-strength type waste asphalt pavement cold renewal emulsion in the mixture of step (b) gained, mix 5-60s, to obtain final product.
The application improves the early strength of cold regeneration mix by the activity of excited cement, and while guarantee cold regeneration mix workability, reduces mixing water amount.
Preferably, above-mentioned cold regeneration mix is for the upper basic unit in asphalt pavement structural layer, cutting optimal or middle surface layer.
The NM technology of the present invention is all with reference to prior art.
Compared with prior art, the present invention has following advantage:
(1) Bituminous Pavement Cold Regeneration emulsion of the present invention is compared with common cold renewal emulsion, its cold regeneration mix early strength prepared significantly promotes, be conducive to quick open to traffic or making upper layer, improve operating efficiency and traffic organization efficiency, thus broadened application scope;
(2) Bituminous Pavement Cold Regeneration emulsion of the present invention, prepared cold regeneration mix is at final strength, anti-water damage property all there is lifting than common cold renewal emulsion, the cold regeneration mix excellent performance that cold renewal emulsion of the present invention is made is added: its Marshall stability of 40 DEG C can reach 11.5kN in waste asphalt mixture cold renewal, the cleavage strength of 15 DEG C can reach 0.78Pa, higher than the requirement of 6kN and 0.5MPa in " asphalt highway regeneration techniques specification " (JTG F41-2008), meet the pavement performance to common hot-mix asphalt mixture in " bituminous pavement design for highway specification " completely simultaneously, motorway can be widely used in, the middle overhaul maintenance of common road and urban road.
Embodiment
In order to understand the present invention better, illustrate content of the present invention further below in conjunction with embodiment, but content of the present invention is not only confined to the following examples.
In following examples, the Performance Detection of the early-strength type cold renewal emulsion prepared is with reference to People's Republic of China's industry standard " highway engineering pitch and Asphalt Mixture Experiment code (JTG E20-2011) ", the Performance Detection of Cold Recycled Mixture with Emulsified Asphalt is with reference to People's Republic of China's industry standard " asphalt highway regeneration techniques specification (JTGF41-2008) ", current specification does not have testing method and technical requirement for early strength, with reference to Marshall stability and the cleavage strength test of asphalt, the testing method of early strength is marshal piece is 20 DEG C in temperature, humidity is 15 DEG C of cleavage strengths that under the constant-temperature constant-humidity environment of 60%, health 2d and 4d tests test specimen, in each embodiment, number is mass fraction, and per-cent is mass percent.
Embodiment 1:
Take 4.0 parts of emulsifying agents, add stablizer 0.15 part, exciting agent 0.1 part, dispersion agent 0.2 part, then add water to 36 parts, add pH regulator auxiliary agent to pH=2.0, finally add water to 38 parts, obtain soap lye.Take 62 parts of petroleum pitch.
Described pitch is No. 70 bi tumenf orr oads (SK companies of Korea S), and described cold renewal emulsifying agent is that Indulin W-5 splits type emulsifying agent (Meadwestvaco company of the U.S.) slowly; Described stablizer is calcium chloride; Described exciting agent is trolamine (Jiaxing Jinyan Chemicals Co., Ltd.); Described dispersion agent is PCA-I type high efficiency water reducing agent (Jiangsu Subotexin Material Co., Ltd), and described pH value regulates auxiliary agent to be hydrochloric acid.
The preparation method of above-mentioned early-strength type cold renewal emulsion is as follows:
Get above-mentioned 62 parts of petroleum pitch and be heated to 135 DEG C, above-mentioned 38 portions of soap lyes are heated to 55 DEG C, soap lye mixture is conveyed in colloidal mill and circulates, again above-mentioned heated bitumen is input in colloidal mill, through colloidal mill dispersed and grinding 2min after, emulsion is exported colloidal mill, is cooled to room temperature, be i.e. obtained early-strength type Bituminous Pavement Cold Regeneration emulsion.
Mineral aggregate 100 parts (wherein: reclaim asphalt pavement material (safe Jiangxi, large wide high speed Jiangxi section milling material) 80 parts, 10-30mm newly gathers materials (Liuhe District, Nanjing new bridge material factory) 18.5 parts, P.O42.5 cement 1.5 parts), above-mentioned made cold renewal emulsion 3.5 parts, 1.8 parts, water are mixed and stirred in amalgamator, order of addition(of ingredients) and technique are: add in amalgamator mineral aggregate (comprise reclaim asphalt pavement material, newly gather materials and cement) mix and stir 10s, add water, mix and stir 30s, finally add cold renewal emulsion, mix and stir 60s.
In embodiment, the test result of cold renewal emulsion is shown in Table 1, and the performance of the Cold Recycled Mixture with Emulsified Asphalt that embodiment obtains is shown in Table 2.
Comparative example 1
Take 4.0 parts of emulsifying agents, add stablizer 0.15 part, exciting agent 0 part, dispersion agent 0 part, then add water to 36 parts, add pH regulator auxiliary agent to pH=2.0, finally add water to 38 parts, obtain soap lye.Take 62 parts of petroleum pitch.
Described pitch is No. 70 bi tumenf orr oads (SK companies of Korea S), and described cold renewal emulsifying agent is that Indulin W-5 splits type emulsifying agent (Meadwestvaco company of the U.S.) slowly; Described stablizer is calcium chloride; Described pH value regulates auxiliary agent to be hydrochloric acid.
Get above-mentioned 62 parts of petroleum pitch and be heated to 135 DEG C, above-mentioned 38 portions of soap lyes are heated to 55 DEG C, soap lye mixture is conveyed in colloidal mill and circulates, again above-mentioned heated bitumen is input in colloidal mill, through colloidal mill dispersed and grinding 2min after, emulsion is exported colloidal mill, is cooled to room temperature, be i.e. the Bituminous Pavement Cold Regeneration emulsion of obtained comparative example.
Get mineral aggregate 100 parts (wherein: reclaim asphalt pavement material 80 parts (safe Jiangxi, large wide high speed Jiangxi section milling material), 10-30mm newly gathers materials (Liuhe District, Nanjing new bridge material factory) 18.5 parts, P.O42.5 cement 1.5 parts), the cold renewal emulsion 3.5 parts of this comparative example, 2.3 parts, water mixes and stirs in amalgamator, order of addition(of ingredients) and technique are with embodiment 1.
In comparative example, the test result of cold renewal emulsion is shown in Table 1, and the performance of the Cold Recycled Mixture with Emulsified Asphalt that comparative example obtains is shown in Table 2.
The performance of table 1 embodiment 1 and comparative example 1 cold renewal emulsion
Table 2 embodiment 1 and comparative example 1 Cold Recycled Mixture with Emulsified Asphalt performance
As can be seen from Table 1, the cold renewal emulsion of embodiment 1 and comparative example 1 can meet the requirement of technical indicator, as can be seen from Table 2, the early strength of the cold recycled asphalt mixture using the emulsified bitumen of comparative example 1 to prepare obviously reduces than embodiment 1, due to non-admixture exciting agent and dispersion agent in the common cold renewal emulsion in comparative example 1, therefore its cold regeneration mix does not have higher early strength.
Embodiment 2:
Take 2.5 parts of emulsifying agents, add stablizer 0.2 part, exciting agent 2 parts, dispersion agent 0.5 part, then add water to 36 parts, add pH regulator auxiliary agent to about pH=2.5, finally add water to 38 parts, obtain soap lye.Take 55 parts of petroleum pitch.
Described pitch is No. 90 bi tumenf orr oads (Liaoning Panjin City north pitch limited-liability company), and described cold renewal emulsifying agent is that E4875 splits type emulsifying agent (Akzo Nobel N.V.) slowly; Described stablizer is calcium chloride; Described exciting agent is diethanolamine (Gutian, Nanjing Chemical Co., Ltd.); Described dispersion agent is PCA-100P powder polycarboxylic acids water reducing agent (Jiangsu Subotexin Material Co., Ltd); Described pH value regulates auxiliary agent to be hydrochloric acid.
The preparation method of above-mentioned early-strength type cold renewal emulsion is as follows:
Get above-mentioned 55 parts of petroleum pitch and be heated to 135 DEG C, above-mentioned 38 portions of soap lyes are heated to 60 DEG C, soap lye mixture is conveyed in colloidal mill and circulates, again above-mentioned heated bitumen is input in colloidal mill, through colloidal mill dispersed and grinding 2min after, emulsion is exported colloidal mill, is cooled to room temperature, be i.e. obtained early-strength type Bituminous Pavement Cold Regeneration emulsion.
By mineral aggregate 100 parts (wherein: reclaim asphalt pavement material 50 parts (Nanjing town road milling material), 10-30mm newly gathers materials 46 parts (Liuhe District, Nanjing new bridge material factories), P.O425 cement 3 parts, breeze 1 part (Liuhe District, Nanjing new bridge material factory)), the cold renewal emulsion of this comparative example 3.6 parts, 2.2 parts, water mixes and stirs in amalgamator, order of addition(of ingredients) and technique are: in amalgamator, add mineral aggregate (comprise recovery asphalt pavement material, newly gather materials and cement, breeze etc.) mix and stir 10s, add water, mix and stir 30s, finally add cold renewal emulsion, mix and stir 60s.Shaping and the health of cold regeneration mix marshal piece is with reference to People's Republic of China's industry standard " asphalt highway regeneration techniques specification (JTGF41-2008) ".
In embodiment, the test result of cold renewal emulsion is shown in Table 3, and the performance of the Cold Recycled Mixture with Emulsified Asphalt that embodiment obtains is shown in Table 4.
Comparative example 2:
Take 2.5 parts of emulsifying agents, add stablizer 0.2 part, exciting agent 0 part, dispersion agent 0 part, then add water to 36 parts, add pH regulator auxiliary agent to about pH=2.5, finally add water to 38 parts, obtain soap lye.Take 55 parts of petroleum pitch.
Described pitch is No. 5 bi tumenf orr oads (Liaoning Panjin City north pitch limited-liability company), and described cold renewal emulsifying agent is that E4875 splits type emulsifying agent (Akzo Nobel N.V.) slowly; Described stablizer is calcium chloride; Described pH value regulates auxiliary agent to be hydrochloric acid.
Get 55 parts of petroleum pitch and be heated to 135 DEG C, above-mentioned 38 portions of soap lyes are heated to 60 DEG C, soap lye mixture is conveyed in colloidal mill and circulates, again above-mentioned heated bitumen is input in colloidal mill, through colloidal mill dispersed and grinding 2min after, emulsion is exported colloidal mill, is cooled to room temperature, be i.e. the Bituminous Pavement Cold Regeneration emulsion of obtained comparative example.
By mineral aggregate 100 parts (wherein: reclaim asphalt pavement material 50 parts (Nanjing town road milling material), 10-30mm newly gathers materials 46 parts (Liuhe District, Nanjing new bridge material factories), P.O425 cement 3 parts, breeze (Liuhe District, Nanjing new bridge material factory) 1 part), the made cold renewal emulsion of the present invention 3.6 parts, 2.8 parts, water mixes and stirs in amalgamator, order of addition(of ingredients) and technique are with embodiment 2.Shaping and the health of cold regeneration mix marshal piece is with reference to People's Republic of China's industry standard " asphalt highway regeneration techniques specification (JTGF41-2008) ".
In comparative example, the test result of cold renewal emulsion is shown in Table 3, and the performance of the Cold Recycled Mixture with Emulsified Asphalt that comparative example obtains is shown in Table 4.
The performance of table 3 embodiment 2 and comparative example 2 cold renewal emulsion
Table 4 embodiment 2 and comparative example 2 Cold Recycled Mixture with Emulsified Asphalt performance
As can be seen from Table 3, the cold renewal emulsion of embodiment 2 and comparative example 2 can meet the requirement of technical indicator, as can be seen from Table 4, the early strength Performance Ratio embodiment 2 of the cold recycled asphalt mixture using the cold renewal emulsion of comparative example 2 to prepare obviously decreases, and describes medium pitch road surface of the present invention cold renewal emulsion equally and has higher early strength.
Embodiment 3:
Take 4 parts of emulsifying agents, add properties-correcting agent 5 parts, stablizer 1 part, exciting agent 0.3 part, dispersion agent 0.3 part, then add water to 35 parts, add pH regulator auxiliary agent to pH=2.2, finally add water to 37 parts, obtain soap lye.Take 63 parts of petroleum pitch.
Described pitch is No. 70 bi tumenf orr oads (Hubei Guochuang Hi-tech Material Co., Ltd.), and described cold renewal emulsifying agent is
slowly type emulsifying agent (Jiangsu Subotexin Material Co., Ltd) is split; Described properties-correcting agent is Indulin1468 styrene-butadiene latex (U.S. Meadwestvaco), and described stablizer is calcium chloride; Described exciting agent is tri-isopropanolamine (Taizhou City greenery patches Chemical Co., Ltd.); Described dispersion agent is naphthene sulfonic acid calcium high efficiency water reducing agent (Jiangsu Subotexin Material Co., Ltd); Described pH value regulates auxiliary agent to be hydrochloric acid.
The preparation method of above-mentioned early-strength type cold renewal emulsion is as follows:
Get above-mentioned 63 parts of petroleum pitch and be heated to 140 DEG C, above-mentioned 37 portions of soap lyes are heated to 45 DEG C, soap lye mixture is conveyed in colloidal mill and circulates, again above-mentioned heated bitumen is input in colloidal mill, through colloidal mill dispersed and grinding 3min after, emulsion is exported colloidal mill, is cooled to room temperature, be i.e. obtained early-strength type Bituminous Pavement Cold Regeneration emulsion.
By mineral aggregate 100 parts (wherein: reclaim asphalt pavement material 65 parts (safe Jiangxi, large wide high speed Jiangxi section milling material), newly gather materials (Liuhe District, Nanjing new bridge material factory) 34 parts, P.O425 cement 1 part.The made cold renewal emulsion of the present invention 3.5 parts, 1.8 parts, water mix and stir in amalgamator, order of addition(of ingredients) and technique are: add in amalgamator mineral aggregate (comprise reclaim asphalt pavement material, newly gather materials and cement, breeze etc.) mix and stir 10s, add water, mix and stir 30s, finally add cold renewal emulsion, mix and stir 60s.Shaping and the health of cold regeneration mix marshal piece is with reference to People's Republic of China's industry standard " asphalt highway regeneration techniques specification (JTGF41-2008) ".
In embodiment, the test result of cold renewal emulsion is shown in Table 5, and the performance of the Cold Recycled Mixture with Emulsified Asphalt that embodiment obtains is shown in Table 6.
Comparative example 3:
Take 4 parts of emulsifying agents, add properties-correcting agent 5 parts, stablizer 1 part, exciting agent 0 part, dispersion agent 0 part, then add water to 35 parts, add pH regulator auxiliary agent to pH=2.2, finally add water to 37 parts, obtain soap lye.Take 63 parts of petroleum pitch.
Described pitch is No. 70 bi tumenf orr oads (Hubei Guochuang Hi-tech Material Co., Ltd.), and described cold renewal emulsifying agent is
slowly type emulsifying agent (Jiangsu Subotexin Material Co., Ltd) is split; Described properties-correcting agent is Indulin1468 styrene-butadiene latex (U.S. Meadwestvaco), and described stablizer is calcium chloride; Described pH value regulates auxiliary agent to be hydrochloric acid.
Get above-mentioned 63 parts of petroleum pitch and be heated to 140 DEG C, above-mentioned 37 portions of soap lyes are heated to 45 DEG C, soap lye mixture is conveyed in colloidal mill and circulates, again above-mentioned heated bitumen is input in colloidal mill, through colloidal mill dispersed and grinding 3min after, emulsion is exported colloidal mill, is cooled to room temperature, be i.e. the Bituminous Pavement Cold Regeneration emulsion of obtained comparative example.
By mineral aggregate 100 parts (wherein: reclaim asphalt pavement material 65 parts (safe Jiangxi, large wide high speed Jiangxi section milling material), newly gather materials (Liuhe District, Nanjing new bridge material factory) 34 parts, P.O425 cement 1 part.The made cold renewal emulsion of the present invention 3.5 parts, 2.1 parts, water mix and stir in amalgamator, and order of addition(of ingredients) and technique are with embodiment 3.Shaping and the health of cold regeneration mix marshal piece is with reference to People's Republic of China's industry standard " asphalt highway regeneration techniques specification (JTGF41-2008) ".
In comparative example, the test result of cold renewal emulsion is shown in Table 5, and the performance of the Cold Recycled Mixture with Emulsified Asphalt that comparative example obtains is shown in Table 6.
The performance of table 5 embodiment 3 and comparative example 3 cold renewal emulsion
Table 6 embodiment 3 and comparative example 3 Cold Recycled Mixture with Emulsified Asphalt performance
As can be seen from Table 5, the cold renewal emulsion of embodiment 3 and comparative example 3 can meet the requirement of technical indicator, as can be seen from Table 6, the early strength performance of cold recycled asphalt mixture prepared by embodiment 3 cold renewal emulsion is significantly higher than in comparative example 2, further illustrates the beneficial effect of early-strength type Bituminous Pavement Cold Regeneration emulsion in the present invention.
Embodiment 4:
Get the asphalt emulsifier of 3.0 parts, the properties-correcting agent of 3 parts, the exciting agent of 0.25 part, the dispersion agent of 0.1 part, the stablizer of 0.5 part, the appropriate auxiliary agent of adjust ph and the water of surplus by mass percentage, be mixedly configured into 36 portions of soap lyes, pH value is 1.9.Get the bi tumenf orr oad of 64 parts, bi tumenf orr oad is heated to 140 DEG C.
Above-mentioned soap lye mixture is conveyed in colloidal mill and circulates, more above-mentioned heated bitumen is input in colloidal mill, through colloidal mill dispersed and grinding 3min after, become emulsion oil-in-water, emulsion is exported colloidal mill, is cooled to room temperature, early-strength type Bituminous Pavement Cold Regeneration emulsion can be obtained.
Described pitch is No. 70 bi tumenf orr oads (Hubei Guochuang Hi-tech Material Co., Ltd.), and described cold renewal emulsifying agent is
slowly type emulsifying agent (Jiangsu Subotexin Material Co., Ltd) is split; Described stablizer is polyvinyl alcohol (Aladdin-Aladdin reagent Shanghai company limited); Described exciting agent is trolamine (Jiaxing Jinyan Chemicals Co., Ltd.); Described dispersion agent is aliphatic high-efficiency water reducing agent (Jiangsu Subotexin Material Co., Ltd); Described pH value regulates auxiliary agent to be hydrochloric acid.
By cold renewal emulsion 3.5 parts, 1.2 parts, water and mineral aggregate 100 parts (wherein: reclaim asphalt pavement material 60 parts (safe Jiangxi, large wide high speed Jiangxi section milling material), newly gather materials (Liuhe District, Nanjing new bridge material factory) 39 parts, P.O425 cement 2 parts), mix and stir in amalgamator, order of addition(of ingredients) and technique are: add in amalgamator mineral aggregate (comprise reclaim asphalt pavement material, newly gather materials and cement, breeze etc.) mix and stir 10s, add water, mix and stir 30s, finally add cold renewal emulsion, mix and stir 60s, namely obtain cold regeneration mix.Table 7 and table 8 list the performance index of cold renewal emulsion and compound in embodiment 4 respectively.
The performance of table 7 embodiment 4 cold renewal emulsion
Cold Recycled Mixture with Emulsified Asphalt performance in table 8 embodiment 4
Embodiment 5:
Get by mass percentage the asphalt emulsifier of 3.0%, 0% properties-correcting agent, 0.25% exciting agent, 0.1% dispersion agent, the stablizer of 0.5%, the appropriate auxiliary agent of adjust ph and the water of surplus, jointly soluble in water, be prepared into soap lye and be heated to 50 DEG C, adjust ph is 1.9; Get 62 parts of pitches, bi tumenf orr oad is heated to 140 DEG C.
Above-mentioned soap lye mixture is conveyed in colloidal mill and circulates, more above-mentioned heated bitumen is input in colloidal mill, through colloidal mill dispersed and grinding 3min after, become emulsion oil-in-water, emulsion is exported colloidal mill, is cooled to room temperature, early-strength type Bituminous Pavement Cold Regeneration emulsion can be obtained.
Described pitch is No. 70 bi tumenf orr oads (Hubei Guochuang Hi-tech Material Co., Ltd.), and described cold renewal emulsifying agent is
slowly type emulsifying agent (Jiangsu Bo Te novel material limited-liability company) is split; Described stablizer is polyvinyl alcohol (Aladdin-Aladdin reagent Shanghai company limited); Described exciting agent is trolamine (Jiaxing Jinyan Chemicals Co., Ltd.); Described dispersion agent is PCA-III type high efficiency water reducing agent (Jiangsu Subotexin Material Co., Ltd); Described pH value regulates auxiliary agent to be hydrochloric acid.
By cold renewal emulsion 5 parts, 0.5 part, water and mineral aggregate 100 parts (wherein: reclaim asphalt pavement material 75 parts (closing Xu Nan high speed Hefei section milling material), (Liuhe District, the Nanjing new bridge material factory) 24 parts that newly gather materials, breeze (Liuhe District, Nanjing new bridge material factory) 1 part), mix and stir in amalgamator, order of addition(of ingredients) and technique are: add in amalgamator mineral aggregate (comprise reclaim asphalt pavement material, newly gather materials and cement, breeze etc.) mix and stir 10s, add water, mix and stir 30s, finally add cold renewal emulsion, mix and stir 60s, namely obtain cold regeneration mix.Table 9 and table 10 list the performance index of cold renewal emulsion and compound in embodiment 5 respectively.
The performance of table 9 embodiment 5 cold renewal emulsion
Cold Recycled Mixture with Emulsified Asphalt performance in table 10 embodiment 5
Claims (9)
1. an early-strength type waste asphalt pavement cold renewal emulsion, it is characterized in that: its feed composition is formulated by mass percentage by following component: bi tumenf orr oad: 50%-65%, asphalt emulsifier: 1.0%-4.5%, properties-correcting agent: 0%-10%, exciting agent: 0%-0.4%, dispersion agent: 0.01%-0.4%, stablizer: 0.05%-2.0%, the auxiliary agent of adjust ph; The water of 0-0.5% and surplus; Described properties-correcting agent is positively charged ion styrene-butadiene latex; Described exciting agent is the mixture of one or more any proportionings in trolamine, diethanolamine, methyl alcohol, ethanol or tri-isopropanolamine.
2. early-strength type waste asphalt pavement cold renewal emulsion as claimed in claim 1, is characterized in that: the penetration degree of described bi tumenf orr oad is 50-110.
3. early-strength type waste asphalt pavement cold renewal emulsion as claimed in claim 1 or 2, is characterized in that: described asphalt emulsifier be positively charged ion split slowly or in split type.
4. early-strength type waste asphalt pavement cold renewal emulsion as claimed in claim 1 or 2, is characterized in that: described dispersion agent is Concrete superplastizer.
5. early-strength type waste asphalt pavement cold renewal emulsion as claimed in claim 4, is characterized in that: Concrete superplastizer is the mixture of one or more any proportionings in lignin sulfonate, aliphatic category, naphthalenesulfonate or polycarboxylic acid.
6. early-strength type waste asphalt pavement cold renewal emulsion as claimed in claim 1 or 2, is characterized in that: described stablizer is the mixture of one or more any proportionings in sodium-chlor, ammonium chloride, Repone K, magnesium chloride, calcium chloride, polyvinyl alcohol or carboxymethyl cellulose; The auxiliary agent of described adjust ph is hydrochloric acid, sulfuric acid, nitric acid, formic acid, phenylformic acid, acetic acid, succinic acid or tartrate.
7. the preparation method of the early-strength type waste asphalt pavement cold renewal emulsion described in claim 1 to 6 any one, is characterized in that: comprise the following steps that order connects:
A bi tumenf orr oad is heated to 120 DEG C-150 DEG C by ();
B () is jointly soluble in water by the auxiliary agent of asphalt emulsifier, properties-correcting agent, exciting agent, dispersion agent, stablizer and adjust ph, be prepared into soap lye and be heated to 40-70 DEG C, and adjust ph is between 1.5-3.0;
C step (b) gained soap lye is conveyed in colloidal mill and circulates by (), again step (a) gained bi tumenf orr oad is input in colloidal mill, through colloidal mill dispersed and grinding after, become emulsion oil-in-water, emulsion is exported colloidal mill, be cooled to room temperature, obtain final product.
8. comprise the cold regeneration mix for early-strength type Bituminous Pavement Cold Regeneration emulsion described in claim 1 to 6 any one, it is characterized in that: its feed composition comprises: bituminous pavement salvage material 50-99 part, new mineral aggregate 0-50 part, ordinary Portland cement 0.5-4 part, breeze 0-4 part, early-strength type waste asphalt pavement cold renewal are with emulsion 2-5 part and water 0-5 part, and described number is mass fraction;
The preparation of above-mentioned cold regeneration mix comprises the steps:
(a) according to cold regeneration mix grating, by bituminous pavement salvage material, new mineral aggregate, ordinary Portland cement and breeze mix 5-30s in agitator kettle;
B () adds water in the mixture of step (a) gained, mix 5-60s;
C () adds early-strength type waste asphalt pavement cold renewal emulsion in the mixture of step (b) gained, mix 5-60s, to obtain final product.
9. cold regeneration mix as claimed in claim 8, is characterized in that: cold regeneration mix is for the upper basic unit in asphalt pavement structural layer, cutting optimal or middle surface layer.
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| CN108559289A (en) * | 2018-05-14 | 2018-09-21 | 重庆路维康交通科技有限公司 | A kind of nano modification emulsified asphalt and its preparation and application |
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