阅读说明：本技术 一种微表处用的改性乳化沥青 (Modified emulsified asphalt for micro surfacing ) 是由 周庆月 于 2019-08-19 设计创作，主要内容包括：本发明公开了一种微表处用的改性乳化沥青,包括以下重量份的材料：沥青55～60重量份；聚1-丁烯5～7重量份；基础乳化剂12～14重量份；助乳化剂8～10重量份；稳定剂0.5～2重量份；水30～40重量份。本发明的微表处用的改性乳化沥青,通过对其化学成分进行优化,在微观程度上改进乳化沥青的内部结构,其具有优异的贮存稳定性,与石料粘附性良好。(The invention discloses modified emulsified asphalt for micro surfacing, which comprises the following materials in parts by weight: 55-60 parts of asphalt; 5-7 parts of poly-1-butene; 12-14 parts by weight of a basic emulsifier; 8-10 parts of a co-emulsifier; 0.5-2 parts by weight of a stabilizer; 30-40 parts of water. The modified emulsified asphalt for micro-surfacing of the invention improves the internal structure of the emulsified asphalt in a micro degree by optimizing the chemical components thereof, and has excellent storage stability and good adhesiveness with stone materials.)

1. The modified emulsified asphalt for micro surfacing is characterized by comprising the following materials in parts by weight:

2. the modified emulsified asphalt for micro-surfacing according to claim 1, wherein the asphalt is selected from one of No. 70 heavy traffic asphalt, No. 90 heavy traffic asphalt, No. 100 general road asphalt, No. 10 construction asphalt or coal-based asphalt.

3. The modified emulsified asphalt for micro-surfacing according to claim 2, wherein the asphalt has a softening point of 50 to 70 ℃ and a penetration of 50 to 1001/10 mm.

4. The modified emulsified asphalt for micro-surfacing according to claim 1, wherein the base emulsifier comprises 24-28 wt% of N, N-dimethyloctadecylamine hydrochloride, 30-40 wt% of cetylpyridinium bromide and 35-40 wt% of dihydroxyethyl oleate imidazoline.

5. The modified emulsified asphalt for micro-surfacing according to claim 1, wherein the co-emulsifier comprises 50-54 wt% polyoxyethylene fatty acid ester and 46-50 wt% polyethylene glycol distearate.

6. The modified emulsified asphalt for micro-surfacing according to claim 1, wherein the stabilizer comprises 30-40 wt% of polyvinyl alcohol and 60-70 wt% of sodium citrate.

7. The modified emulsified asphalt for micro-surfacing according to claim 1, further comprising 0.005 to 0.01 parts by weight of diisooctyl sebacate.

8. The modified emulsified asphalt for micro-surfacing according to claim 1, further comprising 1 to 2 parts by weight of styrene-isoprene-styrene.

9. The modified emulsified asphalt for micro surfacing as claimed in claim 1, further comprising 0.1-0.5 weight part of nitrile latex.

10. The modified emulsified asphalt for micro-surfacing according to claim 8, wherein the styrene-isoprene-styrene has a number average molecular weight of 4000 to 6000.

Technical Field

The invention relates to a pavement material, in particular to modified emulsified asphalt for micro surfacing.

Background

With the construction and the service life of the expressway in China being prolonged, the maintenance work of the expressway has become the key work of the highway department in China. The modified emulsified asphalt is an emulsified asphalt product added with rubber latex high molecular polymers, absorbs the characteristics of rubber asphalt materials, retains the advantages of the emulsified asphalt, improves the weather resistance, the elasticity, the cohesiveness, the toughness and the anti-aging property of the emulsified asphalt, and simultaneously can improve the high-temperature stability, the low-temperature crack resistance, the cohesion, the adhesiveness, the anti-stripping capability, the early strength and the waterproof performance of micro-surfacing, thereby prolonging the service life of the emulsified asphalt. The modified emulsified asphalt can be widely applied to paving and daily maintenance engineering of high-grade roads, particularly, a modified emulsified asphalt product must be used in a micro-surfacing treatment process for pavement maintenance, and the success or failure of the micro-surfacing technology can be directly influenced by the advantages and disadvantages of the technical performance of the modified emulsified asphalt.

Written by Zhang German service and the like and introduced in the book "production and application of petroleum asphalt" published by the Chinese petrochemical publishing company, at present, the types of domestic modified emulsified asphalt are various, and three preparation methods of the modified emulsified asphalt exist. The first method is called a double hot mixing method, i.e., the rubber latex is subjected to two hot mixing dispersion processes. The second method is called a primary hot mixing method, i.e., the rubber latex and the asphalt emulsion are subjected to a primary hot mixing dispersion process. The third method is called a primary cold mixing method, namely, the rubber latex and the asphalt emulsion are subjected to a primary cold mixing and dispersing process. These methods all have the defects of unstable emulsion, poor performance of the emulsifier and the like.

Disclosure of Invention

In view of the above-mentioned disadvantages, the present invention is directed to developing a modified emulsified asphalt for micro surfacing, which has excellent storage stability and good adhesiveness to stone.

The technical scheme of the invention is summarized as follows:

the modified emulsified asphalt for micro surfacing comprises the following materials in parts by weight:

preferably, the modified emulsified asphalt for micro-surfacing is one selected from No. 70 heavy traffic asphalt, No. 90 heavy traffic asphalt, No. 100 common road asphalt, No. 10 construction asphalt or coal-based asphalt.

Preferably, the modified emulsified asphalt for micro-surfacing is characterized in that the softening point of the asphalt is 50-70 ℃, and the penetration degree of the asphalt is 50-1001/10 mm.

Preferably, the modified emulsified asphalt for micro-surfacing comprises 24-28 wt% of N, N-dimethyl octadecanoic amine hydrochloride, 30-40 wt% of cetyl pyridine bromide and 35-40 wt% of dihydroxyethyl oleate imidazoline.

Preferably, the modified emulsified asphalt for micro-surfacing comprises 50-54 wt% of fatty acid polyoxyethylene ester and 46-50 wt% of polyethylene glycol distearate.

Preferably, the modified emulsified asphalt for micro-surfacing comprises 30-40 wt% of polyvinyl alcohol and 60-70 wt% of sodium citrate.

Preferably, the modified emulsified asphalt for micro-surfacing further comprises 0.005-0.01 part by weight of diisooctyl sebacate.

Preferably, the modified emulsified asphalt for micro-surfacing further comprises 1-2 parts by weight of styrene-isoprene-styrene.

Preferably, the modified emulsified asphalt for micro surfacing further comprises 0.1-0.5 part by weight of butyronitrile latex.

Preferably, the modified emulsified asphalt for micro-surfacing is characterized in that the number average molecular weight of the styrene-isoprene-styrene is 4000 to 6000.

The invention has the beneficial effects that:

(1) the modified emulsified asphalt for micro-surfacing of the invention improves the internal structure of the emulsified asphalt in a micro degree by optimizing the chemical components thereof, and has excellent storage stability and good adhesiveness with stone materials.

(2) According to the invention, the poly-1-butene is added to improve the fusion degree between the interfaces of the rubber particles after demulsification, so that a rubber network structure is formed, the high-temperature and low-temperature performances of the modified emulsified asphalt are improved, and the adhesion with coarse aggregates is improved; n, N-dimethyl octadecylamine hydrochloride, cetyl pyridine bromide and dihydroxyethyl oleic acid radical imidazoline are used as an emulsifier, so that the compatibility of the emulsifier and asphalt is improved, the emulsification effect is improved, and the product performance is stable; the synergistic effect of the polyvinyl alcohol and the sodium citrate improves the stability of the emulsified asphalt; the diisooctyl sebacate is added into the asphalt and the poly-1-butene, so that the attraction among polymer molecular chains is weakened, the mobility and the flexibility of the molecular chains are improved, the compatibility with the asphalt is good, and the thermal stability of the emulsified asphalt can be improved; the styrene-isoprene-styrene has high-temperature toughness, and is added into the asphalt to increase the strength of a rubber network, so that the toughness and the toughness of the modified asphalt can be obviously enhanced.

Detailed Description

The present invention is further described in detail below with reference to examples so that those skilled in the art can practice the invention with reference to the description.

The scheme provides modified emulsified asphalt for micro surfacing, which comprises the following materials in parts by weight:

the asphalt is a black-brown complex mixture composed of hydrocarbons with different molecular weights and nonmetal derivatives thereof, is one of high-viscosity organic liquids, is in a liquid state, has a black surface, and is soluble in carbon disulfide. Asphalt is a waterproof, moistureproof and anticorrosive organic cementing material. The poly-1-butylene is added to improve the fusion degree between colloidal particle interfaces after demulsification, so that a rubber network structure is formed, the high-temperature and low-temperature performances of the modified emulsified asphalt are improved, and the adhesion with coarse aggregates is improved.

As another embodiment of the present disclosure, the asphalt is selected from one of No. 70 heavy traffic asphalt, No. 90 heavy traffic asphalt, No. 100 common road asphalt, No. 10 construction asphalt, or coal-based asphalt.

As another embodiment of the present invention, the asphalt has a softening point of 50 to 70 ℃ and a penetration of 50 to 1001/10 mm.

As another embodiment of the present invention, the base emulsifier comprises 24-28 wt% of N, N-dimethyloctadecylamine hydrochloride, 30-40 wt% of cetylpyridinium bromide and 35-40 wt% of dihydroxyethyl oleate imidazoline. N, N-dimethyl octadecylamine hydrochloride, cetyl pyridine bromide and dihydroxyethyl oleic acid radical imidazoline are used as an emulsifier, so that the compatibility of the emulsifier and asphalt is improved, the emulsification effect is improved, and the product performance is stable.

As another embodiment of the present disclosure, the co-emulsifier comprises 50-54 wt% of polyoxyethylene fatty acid ester and 46-50 wt% of polyethylene glycol distearate. The dispersing performance and the emulsifying performance of the product are further improved by the fatty acid polyoxyethylene ester and the polyethylene glycol distearate.

As another embodiment of the present disclosure, the stabilizer comprises 30 to 40 wt% of polyvinyl alcohol and 60 to 70 wt% of sodium citrate. The synergistic effect of polyvinyl alcohol and sodium citrate improves the stability of the emulsified asphalt.

As another embodiment of the present invention, the paint further comprises 0.005 to 0.01 weight part of diisooctyl sebacate. The diisooctyl sebacate is added into the asphalt and the poly-1-butene, so that the attraction among polymer molecular chains is weakened, the mobility and the flexibility of the molecular chains are improved, the compatibility with the asphalt is good, and the thermal stability of the emulsified asphalt can be improved.

As another embodiment of the present disclosure, the composition further comprises 1 to 2 parts by weight of styrene-isoprene-styrene. The styrene-isoprene-styrene has high-temperature toughness, and is added into the asphalt to increase the strength of a rubber network, so that the toughness and the toughness of the modified asphalt can be obviously enhanced.

As another embodiment of the present disclosure, the adhesive further comprises 0.1 to 0.5 parts by weight of a nitrile latex. The butyronitrile latex and the styrene-isoprene-styrene generate cross-linking reaction under the action of a cross-linking agent and generate grafting reaction with the asphalt, the formed network structure wraps the asphalt and the filler dispersed in the emulsified asphalt, the adhesiveness with stone is improved, the micro-surfacing seal material is prevented from generating phase separation, segregation and delamination are not generated after storage at high temperature, and the excellent tensile, fracture-resistant and heat-resistant waterproof performances of the pavement material are provided.

In another embodiment of the present disclosure, the number average molecular weight of the styrene-isoprene-styrene is 4000 to 6000. The molecular weight of the polymer plays an important role in the performance of the polymer, and polymers with different molecular weights have completely different mechanical and chemical properties. The number average molecular weight of styrene-isoprene-styrene used in the scheme is limited, if the number average molecular weight is less than 4000, the viscosity of a system is reduced, the machining performance of a polymer is greatly reduced, asphalt shows a soft characteristic, and although the flexibility is good, when the asphalt is used for micro-surfacing, the firmness and the waterproofness of the asphalt cannot meet the requirements; if the number average molecular weight is more than 6000g/mol, the viscosity of the system is increased, the mechanical property of the polymer is increased, but the turbidity of the system is also increased correspondingly, so that the toughness of the asphalt is reduced, and the stress buffering and cracking delaying performance of the cement stabilized base layer are reduced.

Specific examples and comparative examples are listed below: