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In-situ warm-mixing regenerant for bituminous pavement, preparation method and construction method of in-situ warm-mixing regenerant

A warm mix regenerant and asphalt pavement technology, applied in roads, roads, road repair and other directions, can solve the problems of long forming time of cold recycled mixture strength, affecting the service life of the mixture, environmental impact damage, etc., reaching the pavement construction season. The effect of prolonging the daily construction time, prolonging the compaction time and reducing environmental pollution

Active Publication Date: 2015-01-07
CCCC FIRST HIGHWAY CONSULTANTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantages of hot-in-place regeneration are: ①The heating temperature of the aggregate is too high (about 180°C) during thermal regeneration and remixing. After mixing with RAP material (old material for asphalt pavement milling), it is easy to make the The asphalt is aging again, which affects the service life of the mixture; ②The heat regeneration requires a high heating temperature (about 180°C), which increases the energy consumption and aggravates the damage to the environment; ③Adds new aggregates and new asphalt
The main disadvantages of in-situ cold regeneration are: ①The strength of the cold recycled mixture takes a long time to form; ②It needs to be covered with a certain thickness of overlay; ③The performance of the recycled mixture is poor, and the layers generally used are low; ④Cold mixing technology generally needs to add cement, so that the durability of this layer is reduced

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] An in-situ warm-mixing regenerant for asphalt pavement is composed of the following raw materials in parts by mass:

[0040] 20 parts of cycloalkane;

[0041] 30 parts of furfural extract oil;

[0042] 40 parts of deionized water;

[0043] 15 parts of microwave absorbent;

[0044] 8 parts of surfactant;

[0045] 8 parts of dispersant;

[0046] 3 parts of anti-aging agent;

[0047] in:

[0048] Described microwave absorber is manganese dioxide;

[0049] Described tensio-active agent is sodium dodecylbenzenesulfonate;

[0050] Described dispersant is M80;

[0051] Described antiaging agent is benzophenone;

[0052] Naphthenes are microcrystalline paraffins with a melting range of 70-90°C;

[0053] A preparation method of in-situ warm mixing regenerant for asphalt pavement, comprising the steps of:

[0054] 1) Stir and mix 40 parts by mass of deionized water and 8 parts by mass of surfactant at 50-70°C;

[0055] 2) Stir and mix 20 parts by mass of cycloalka...

Embodiment 2

[0060] An in-situ warm-mixing regenerant for asphalt pavement is composed of the following raw materials in parts by mass:

[0061] 20 parts of cycloalkane;

[0062] 30 parts of furfural extract oil;

[0063] 35 parts of deionized water;

[0064] 13 parts of microwave absorbent;

[0065] 7 parts of surfactant;

[0066] 6 parts of dispersant;

[0067] Anti-aging agent 2 parts;

[0068] in:

[0069] Described microwave absorber is selected from acetylene carbon black, manganese dioxide or carbon black;

[0070] Described surfactant is selected from alkylbenzene sulfonate or K50;

[0071] The dispersant is selected from polyethylene glycol 200 or M80;

[0072] Described antiaging agent is selected from benzophenone or dibutyl hydroxytoluene;

[0073] Naphthenes are microcrystalline paraffins with a melting range of 70-90°C;

[0074] A preparation method of in-situ warm mixing regenerant for asphalt pavement, comprising the steps of:

[0075] 1) Stir and mix 35 parts ...

Embodiment 3

[0081] An in-situ warm-mixing regenerant for asphalt pavement is composed of the following raw materials in parts by mass:

[0082] 15 parts of naphthenic alkane;

[0083] 25 parts of furfural extract oil;

[0084] 45 parts of deionized water;

[0085] 15 parts of microwave absorbent;

[0086] 6 parts of surfactant;

[0087] 7 parts of dispersant;

[0088] 1 part anti-aging agent;

[0089] in:

[0090] Described microwave absorber is selected from acetylene carbon black, manganese dioxide or carbon black;

[0091] Described surfactant is selected from alkylbenzene sulfonate or K50;

[0092] The dispersant is selected from polyethylene glycol 200 or M80;

[0093] Described antiaging agent is selected from benzophenone or dibutyl hydroxytoluene;

[0094] Long-chain alkanes are microcrystalline paraffins with a melting range of 70-90°C;

[0095] A preparation method of in-situ warm mixing regenerant for asphalt pavement, comprising the steps of:

[0096] 1) Stir an...

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Abstract

The invention relates to an in-situ warm-mixing regenerant for a bituminous pavement, and a preparation method and a construction method of the in-situ warm-mixing regenerant. The strength of a cold-regenerating mixture is longer in formation time; a finish coat in a certain thickness is required to be paved additionally; the property of the regenerated mixture is poorer; a lower level cold mixing technology is used generally; and cement is required to be added generally, so that the durability of the level is reduced. The in-situ warm-mixing regenerant for the bituminous pavement comprises the following raw materials in parts by mass: 10-30 parts of naphthenic hydrocarbon, 20-40 parts of furfural extract oil, 30-50 parts of deionized water, 10-20 parts of microwave absorption agent, 5-10 parts of surfactant, 5-10 parts of dispersing agent and 1-5 parts of antiaging agent. According to the in-situ warm-mixing regenerant, the preparation method and the construction method, the mixing cost can be lowered; the construction efficiency is improved; a use ratio of old materials is increased; compared with in-situ heat regeneration, the ageing of a bituminous mixture is reduced; the service life of the pavement is prolonged; a cooling rate is reduced; the discharge amount of harmful gas and dust is decreased; new aggregates and new bitumen are not required to be added; and the material cost is lowered.

Description

technical field [0001] The invention relates to the technical field of on-site regeneration of asphalt pavement, in particular to an in-situ warm-mix regeneration agent for asphalt pavement, its preparation method and its construction method. Background technique [0002] At present, in-situ regeneration technology of asphalt pavement can be divided into hot-in-place regeneration technology and cold-in-place regeneration technology. Hot-in-place regeneration refers to heating and softening the original asphalt pavement, loosening (planing) the old pavement mechanically, stirring it (asphalt, regeneration agent, new mixture or new aggregate can be added as needed), and Re-paving and compacting the formed recycled mixture on the spot, so as to achieve the road maintenance process of eliminating road surface diseases and restoring road surface performance. The hot-in-place recycling technology is mainly used to restore the bonding properties of aged asphalt, and regenerate the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L91/06C08L91/00C08K3/04C08K3/22C08K5/42C08K5/07C08K5/13C08J3/28E01C23/06
Inventor 陈团结李永翔张光普赵明张冬梅向豪屈腾王争军冯焘陆晶晶
Owner CCCC FIRST HIGHWAY CONSULTANTS
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