Warm-mix recycled asphalt modifier and preparation method thereof

Abstract

The invention discloses a warm-mix recycled asphalt modifier and a preparation method thereof. The warm-mix asphalt modifier is prepared from the following components in parts by weight: 55-65 parts of solvent oil, 8-20 parts of an interfacial active agent and 25-35 parts of a high-melting-point aromatic component. According to the a warm-mix recycled asphalt modifier, the interfacial active agentand the high-boiling-point aromatic component are compounded and used, so that the mixing temperature of the asphalt mixture is greatly reduced, and the addition proportion of old materials for recycling is increased. Meanwhile, the risk of water damage caused by the recycled asphalt mixture is effectively reduced, low-temperature anti-cracking performance of the asphalt mixture is improved, andthe advantages of simple process, energy conservation, environment friendliness, low cost and the like are achieved.

Description

technical field

[0001] The invention relates to the technical field of road asphalt, in particular to a warm-mix recycled asphalt modifier. Background technique

[0002] The research on warm-mix asphalt mixture originated in Europe in the 1990s. It refers to a type of mixing temperature between hot-mix asphalt mixture (150°C-180°C) and cold-mix asphalt mixture (10°C-40°C). During the period, the performance of the new asphalt mixture reaches that of the hot mix asphalt mixture. Warm mix asphalt mixture can effectively reduce the mixing and construction temperature of asphalt mixture while maintaining the excellent road performance and construction quality of hot mix asphalt mixture by adding additives or using foamed asphalt. Decrease to 100°C ~ 130°C.

[0003] In road engineering construction, the production and application of asphalt mixture is a major source of energy consumption and environmental pollution. According to German research data, it takes 8L of fuel oil to...

Examples

preparation example Construction

[0029] The present invention also provides a preparation method for the warm-mix recycled asphalt modifier, comprising the steps of:

[0030] (1) Weigh 55-65 parts of mineral spirits by weight and heat to 75-85°C;

[0031] (2) Add 8-20 parts of surfactant to the above-mentioned solvent oil, turn on the vacuum device and perform mechanical stirring for 20 minutes;

[0032] (3) Control the temperature down to 55°C-65°C, turn off the vacuum device, then add 25-35 parts of high-melting aromatic components into the above mixture, stir for 10-15 minutes, and cool to room temperature to obtain a warm-mix recycled asphalt modifier .

[0033] In the above step (2), the vacuum degree of the vacuum device is controlled at 30-40Pa.

[0034] In addition, in the embodiments of the present invention, the softening point test, ductility test and penetration test of warm-mix asphalt, the mixing and molding process test of warm-mix asphalt mixture, void ratio test, Marshall residual stability...

Embodiment 1

[0036] (1) Take 55 parts of lubricating oil base oil by weight and heat to 85°C;

[0037] (2) Mix 8 parts of saturated C 12 ~C 18 Add alkylpolypropylene polyamine to the above-mentioned lubricating base oil, turn on the vacuum device and carry out mechanical stirring, stirring for 20min, and the vacuum degree is 40Pa;

[0038] (3) Control the temperature down to 55°C, turn off the vacuum device, add 25 parts of S-200 solvent oil to the above mixture, stir for 10 minutes, and cool to room temperature to obtain a warm-mix recycled asphalt modifier.

[0039] Preparation of warm-mix recycled asphalt mixture: heat 40% of old asphalt mixture and 60% of new aggregate to a certain temperature; Then add new aggregate and new asphalt for mixing, that is, warm mix recycled asphalt mixture is prepared.

[0040] The specific technical indicators of the obtained warm-mix recycled asphalt mixture are shown in Table 1.

Embodiment 2

[0042] (1) Take by weight 65 parts of catalytic cracking oil slurry and heat to 75 ° C;

[0043] (2) Put 20 copies of C 12 ~C 18 Add fatty amidoamine to the cracked tar above, turn on the vacuum device and perform mechanical stirring, stir for 20min, and the vacuum degree is 30Pa;

[0044] (3) Control the temperature down to 65°C, turn off the vacuum device, add 35 parts of SH0004-90 solvent oil to the above mixture, stir for 15 minutes, and cool to room temperature to obtain a warm-mix recycled asphalt modifier.

[0045] Preparation of warm-mix recycled asphalt mixture: heat 50% of old asphalt mixture and 50% of new aggregate to a certain temperature; Then add new aggregate and new asphalt for mixing, that is, warm mix recycled asphalt mixture is prepared.

[0046] The specific technical indicators of the obtained warm-mix recycled asphalt mixture are shown in Table 1.

technical field

[0001] The invention relates to the technical field of road asphalt, in particular to a warm-mix recycled asphalt modifier. Background technique

[0002] The research on warm-mix asphalt mixture originated in Europe in the 1990s. It refers to a type of mixing temperature between hot-mix asphalt mixture (150°C-180°C) and cold-mix asphalt mixture (10°C-40°C). During the period, the performance of the new asphalt mixture reaches that of the hot mix asphalt mixture. Warm mix asphalt mixture can effectively reduce the mixing and construction temperature of asphalt mixture while maintaining the excellent road performance and construction quality of hot mix asphalt mixture by adding additives or using foamed asphalt. Decrease to 100°C ~ 130°C.

[0003] In road engineering construction, the production and application of asphalt mixture is a major source of energy consumption and environmental pollution. According to German research data, it takes 8L of fuel oil to...

Examples

preparation example Construction

[0029] The present invention also provides a preparation method for the warm-mix recycled asphalt modifier, comprising the steps of:

[0030] (1) Weigh 55-65 parts of mineral spirits by weight and heat to 75-85°C;

[0031] (2) Add 8-20 parts of surfactant to the above-mentioned solvent oil, turn on the vacuum device and perform mechanical stirring for 20 minutes;

[0032] (3) Control the temperature down to 55°C-65°C, turn off the vacuum device, then add 25-35 parts of high-melting aromatic components into the above mixture, stir for 10-15 minutes, and cool to room temperature to obtain a warm-mix recycled asphalt modifier .

[0033] In the above step (2), the vacuum degree of the vacuum device is controlled at 30-40Pa.

[0034] In addition, in the embodiments of the present invention, the softening point test, ductility test and penetration test of warm-mix asphalt, the mixing and molding process test of warm-mix asphalt mixture, void ratio test, Marshall residual stability...

Embodiment 1

[0036] (1) Take 55 parts of lubricating oil base oil by weight and heat to 85°C;

[0037] (2) Mix 8 parts of saturated C 12 ~C 18 Add alkylpolypropylene polyamine to the above-mentioned lubricating base oil, turn on the vacuum device and carry out mechanical stirring, stirring for 20min, and the vacuum degree is 40Pa;

[0038] (3) Control the temperature down to 55°C, turn off the vacuum device, add 25 parts of S-200 solvent oil to the above mixture, stir for 10 minutes, and cool to room temperature to obtain a warm-mix recycled asphalt modifier.

[0039] Preparation of warm-mix recycled asphalt mixture: heat 40% of old asphalt mixture and 60% of new aggregate to a certain temperature; Then add new aggregate and new asphalt for mixing, that is, warm mix recycled asphalt mixture is prepared.

[0040] The specific technical indicators of the obtained warm-mix recycled asphalt mixture are shown in Table 1.

Embodiment 2

[0042] (1) Take by weight 65 parts of catalytic cracking oil slurry and heat to 75 ° C;

[0043] (2) Put 20 copies of C 12 ~C 18 Add fatty amidoamine to the cracked tar above, turn on the vacuum device and perform mechanical stirring, stir for 20min, and the vacuum degree is 30Pa;

[0044] (3) Control the temperature down to 65°C, turn off the vacuum device, add 35 parts of SH0004-90 solvent oil to the above mixture, stir for 15 minutes, and cool to room temperature to obtain a warm-mix recycled asphalt modifier.

[0045] Preparation of warm-mix recycled asphalt mixture: heat 50% of old asphalt mixture and 50% of new aggregate to a certain temperature; Then add new aggregate and new asphalt for mixing, that is, warm mix recycled asphalt mixture is prepared.

[0046] The specific technical indicators of the obtained warm-mix recycled asphalt mixture are shown in Table 1.

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