1. The seal coat hydraulic asphalt is prepared from the following raw materials:

100 parts of base asphalt;

5-9 parts of modifier;

4-14 parts of ductility enhancer;

0.2 to 0.35 weight portion of stabilizer;

the modifier is SBS modifier.

2. The seal coat hydraulic asphalt of claim 1, wherein the base asphalt is No. 70 base asphalt.

3. The seal coat hydraulic asphalt of claim 1, wherein the SBS modifier is selected from one or more of SBS modifier YH-791, SBS modifier 1301-1, SBS modifier YH-792 and SBS modifier YH-796.

4. The seal coat hydraulic asphalt of claim 1, wherein the ductility agent has a density of 0.95g/cm³～1.05g/cm³The flash point is greater than 230 ℃.

5. The seal coat hydraulic asphalt of claim 1, wherein the stabilizer is selected from one or more of the group consisting of stabilizer HMD-2, stabilizer ZZ-1, stabilizer WDJ-2, and stabilizer HSSTAB-3.

6. A preparation method of the seal coat hydraulic asphalt of any one of claims 1 to 5, comprising the following steps:

a) heating the base asphalt, adding the ductility enhancer and the modifier, sequentially swelling and over-grinding, adding the stabilizer, and developing to obtain the seal coat hydraulic asphalt.

7. The method of claim 6, wherein the heating temperature in step a) is 165 ℃ to 175 ℃.

8. The method according to claim 6, wherein the swelling time in step a) is 5 to 15 min.

9. The preparation method according to claim 6, wherein the temperature of the over-grinding in the step a) is 172 to 178 ℃, the temperature of the grinding head is 120 to 140 ℃, and the times are 1 to 3.

10. The method of claim 6, wherein the development in step a) is by stirring; the development time is 2-4 h, the temperature is 170-178 ℃, and the stirring speed is 150-300 rpm.

Background

The hydraulic asphalt is mainly used for hydraulic engineering such as damming, coastal dike protection, channel seepage prevention, reservoir and the like. Asphalt concrete is used as an anti-seepage surface layer or a core wall of the dam, the anti-seepage performance is superior to that of reinforced concrete, and the anti-seepage concrete has higher plasticity and flexibility and can better adapt to uneven settlement and deformation of hydraulic buildings. Meanwhile, the asphalt concrete seepage-proofing project also has the advantages of small project amount, quick construction and the like. However, the performance of asphalt concrete and solid buildings is greatly restricted by the properties of asphalt materials, and hydraulic buildings generally belong to large-scale projects with large investment and have strict requirements on safety and reliable service life, so that petroleum asphalt for hydraulic construction needs to be strictly screened, but the national formal hydraulic asphalt standard does not exist at present, and some domestic major hydraulic projects mostly refer to the foreign standards.

Since the implementation of the industry standard of petrochemical engineering 'hydraulic engineering petroleum asphalt' in 2008, no matter technology or indexes of several domestic petroleum asphalt for large-scale hydraulic engineering can reach the international leading level, therefore, the development of the hydraulic engineering asphalt has important significance for promoting the hydraulic engineering seepage-proofing technology and the hydraulic engineering industry in China.

Patent CN200610063232.7 discloses a preparation method of hydraulic asphalt, which adopts SBS and SBR as modifiers, adds sulfur, and finally obtains the hydraulic asphalt through swelling and shearing. However, the invention adopts two modifiers of SBS and SBR, and the storage stability is poor. Patent 200410050795.3 discloses a method for preparing hydraulic asphalt, which uses high-grade base asphalt to prepare hydraulic asphalt after oxidation; however, the raw materials required by the method are harsh, the oxidation process is complicated, the oxidation degree is not easy to control, and the production cost is increased. Patent 201711310671.8 discloses a method for preparing hydraulic engineering asphalt, which adopts boskan crude oil and Mary-16 crude oil to directly distill the hydraulic engineering asphalt by adopting a pressure reduction and direct drawing process; however, the hydraulic asphalt prepared by the process has lower softening point, poorer high-temperature performance and better underwater use, is not suitable for being used as a sealing layer, and in addition, the invention has narrower selection on crude oil. Patent 201811475775.9 discloses a method for preparing hydraulic asphalt, which uses SBS, SBR and PPA as modifier, adds aromatic oil and cross-linking agent, and makes them undergo the processes of swelling, shearing and development to obtain the hydraulic asphalt, but the hydraulic asphalt prepared by said method also has small softening point and poor storage stability. Meanwhile, most of the hydraulic asphalt in the prior art is used for an impermeable layer, when the hydraulic asphalt is used for a sealing layer, the high-temperature performance mostly cannot meet the requirement, basically, the hydraulic asphalt has the technical problems of low softening point, easy flowing, poor high-temperature stability, small penetration, general low-temperature performance and poor low-temperature brittleness of the asphalt, namely, the asphalt sealing layer is likely to be cracked under the water surface in winter, poor low-temperature flexibility, low deformability to be improved and the like.

Disclosure of Invention

In view of the above, the invention aims to provide a sealing layer hydraulic asphalt and a preparation method thereof, and the sealing layer hydraulic asphalt provided by the invention has a higher softening point (good high-temperature performance), is not easy to flow when used for a sealing layer, and has good high-temperature stability; the penetration degree is large, the low-temperature performance is excellent, the low-temperature brittleness of the asphalt is improved, and the asphalt sealing layer can not be cracked even below the water surface in winter; meanwhile, the low-temperature flexibility is good, and the high-temperature flexible cable has excellent deformability.

The invention provides a seal coat hydraulic asphalt which is prepared from the following raw materials:

100 parts of base asphalt;

5-9 parts of modifier;

4-14 parts of ductility enhancer;

0.2 to 0.35 weight portion of stabilizer;

the modifier is SBS modifier.

Preferably, the base asphalt is No. 70 base asphalt.

Preferably, the SBS modifier is selected from one or more of the SBS modifier YH-791, the SBS modifier 1301-1, the SBS modifier YH-792 and the SBS modifier YH-796.

Preferably, the density of the ductility agent is 0.95g/cm³～1.05g/cm³The flash point is greater than 230 ℃.

Preferably, the stabilizer is selected from one or more of a stabilizer HMD-2, a stabilizer ZZ-1, a stabilizer WDJ-2 and a stabilizer HSSTAB-3.

The invention also provides a preparation method of the seal coat hydraulic asphalt, which comprises the following steps:

a) heating the base asphalt, adding the ductility enhancer and the modifier, sequentially swelling and over-grinding, adding the stabilizer, and developing to obtain the seal coat hydraulic asphalt.

Preferably, the heating temperature in step a) is 165 ℃ to 175 ℃.

Preferably, the swelling time in step a) is 5min to 15 min.

Preferably, the temperature of the over-grinding in the step a) is 172-178 ℃, the temperature of the grinding head is 120-140 ℃, and the times are 1-3.

Preferably, the mode of development in step a) is agitation; the development time is 2-4 h, the temperature is 170-178 ℃, and the stirring speed is 150-300 rpm.

The invention provides a seal coat hydraulic asphalt which is prepared from the following raw materials: 100 parts of base asphalt; 5-9 parts of modifier; 4-14 parts of ductility enhancer; 0.2 to 0.35 weight portion of stabilizer; the modifier is SBS modifier. Compared with the prior art, the seal layer hydraulic asphalt provided by the invention adopts specific content components, realizes better integral interaction, has higher softening point and excellent high-temperature performance, is not easy to flow when being used for a seal layer, and has good high-temperature stability; the penetration degree is large, the low-temperature performance is excellent, the low-temperature brittleness of the asphalt is improved, and the asphalt sealing layer can not be cracked even below the water surface in winter; meanwhile, the low-temperature flexibility is good, and the high-temperature flexible cable has excellent deformability.

In addition, the preparation method provided by the invention has the advantages of simple process, easily-controlled conditions, wide and easily-obtained raw material selection and low cost, is suitable for large-scale production and has wide application prospect, and common No. 70 matrix asphalt is adopted for modification.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a seal coat hydraulic asphalt which is prepared from the following raw materials:

100 parts of base asphalt;

5-9 parts of modifier;

4-14 parts of ductility enhancer;

0.2 to 0.35 weight portion of stabilizer;

the modifier is SBS modifier.

In the invention, the seal coat hydraulic asphalt is prepared from raw materials including base asphalt, a modifier, a ductility enhancer and a stabilizer, preferably the base asphalt, the modifier, the ductility enhancer and the stabilizer.

In the present invention, the base asphalt is preferably 70# base asphalt, that is, road petroleum asphalt meeting the 70# specification. The source of the base asphalt in the present invention is not particularly limited, and commercially available products known to those skilled in the art may be used. In the present invention, the seal coat hydraulic asphalt comprises 100 parts by weight of the base asphalt.

In the present invention, the modifier is an SBS modifier; the SBS modifier is preferably selected from one or more of SBS modifier YH-791 (Yueyanite), SBS modifier 1301-1 (Ningpo family), SBS modifier YH-792 (Balingite) and SBS modifier YH-796 (Balingite), more preferably SBS modifier YH-791 or SBS modifier 1301-1. In the invention, the SBS modifier has good high temperature resistance and low temperature resistance, and can improve the low temperature brittle point index of the asphalt. The source of the modifier is not particularly limited in the present invention, and commercially available products of the above triblock linear SBS known to those skilled in the art may be used. In the invention, the seal coat hydraulic asphalt comprises 5-9 parts by weight of modifier.

In the invention, the extension agent is an additive containing a surfactant, non-rubber oil, furfural extract oil and the like; the density of the ductility improver is preferably 0.95g/cm³～1.05g/cm³The flash point is preferably greater than 230 ℃. In the invention, the ductility enhancer can reduce the interfacial tension between SBS and asphalt, effectively promote the compatibility between SBS polymer and asphalt, increase the thickness of the interfacial layer between SBS polymer and asphalt, improve the quality of the modified asphalt, especially obviously improve the ductility of the asphalt at 5 ℃ and increase the stability of the modified asphalt. The source of the extender is not particularly limited in the present invention, and commercially available products well known to those skilled in the art may be used. In the invention, the seal coat hydraulic asphalt comprises 4 to 14 parts by weight of the ductility improver, and more preferably 6 to 14 parts by weight.

In the present invention, the stabilizer is selected from one or more of a stabilizer HMD-2 (Dongyun Fengbobo mountain stone oil technology Co., Ltd.), a stabilizer ZZ-1 (Jiangsu causeware New Material technology Co., Ltd.), a stabilizer WDJ-2 (Hebei Shizhuang Junlong chemical products marketing Co., Ltd.) and a stabilizer HSSTAB-3 (Jinan and Shun New Material Co., Ltd.), more preferably the stabilizer HMD-2. In the invention, the stabilizer can form a network structure knot in the asphalt, thereby increasing the thermal stability and toughness of the asphalt and improving the problem of storage and segregation of the modified asphalt. The source of the stabilizer in the present invention is not particularly limited, and commercially available products known to those skilled in the art may be used. In the present invention, the seal coat hydraulic asphalt comprises 0.2 to 0.35 parts by weight of the stabilizer, more preferably 0.3 parts by weight.

The hydraulic asphalt for the sealing layer provided by the invention adopts specific content components, so that the overall better interaction is realized, the product has higher softening point and excellent high-temperature performance, and is not easy to flow and good in high-temperature stability when being used for the sealing layer; the penetration degree is large, the low-temperature performance is excellent, the low-temperature brittleness of the asphalt is improved, and the asphalt sealing layer can not be cracked even below the water surface in winter; meanwhile, the low-temperature flexibility is good, and the high-temperature flexible cable has excellent deformability; meanwhile, only SBS is used as modifier, so that storage stability is improved. Therefore, the product provided by the invention is the polymer modified hydraulic asphalt for the sealing layer, has excellent high-temperature performance and low-temperature performance, and widens the application channel of the polymer modified asphalt.

The invention also provides a preparation method of the seal coat hydraulic asphalt, which comprises the following steps:

a) heating the base asphalt, adding the ductility enhancer and the modifier, sequentially swelling and over-grinding, adding the stabilizer, and developing to obtain the seal coat hydraulic asphalt.

In the present invention, the matrix asphalt, the ductility enhancer, the modifier and the stabilizer are the same as those in the above technical scheme, and are not described herein again.

In the present invention, the heating temperature is preferably 165 to 175 ℃, more preferably 170 ℃. The present invention preferably further comprises, prior to heating:

carrying out sample preparation on the matrix asphalt; the temperature of the sample is preferably 130 ℃ to 140 ℃, more preferably 135 ℃.

In the present invention, the swelling time is preferably 5 to 15min, more preferably 10 min.

In the present invention, the temperature of the over-grinding is preferably 172 to 178 ℃, more preferably 175 ℃; the temperature of the grinding head for over grinding is preferably 120-140 ℃, and more preferably 130-135 ℃; the number of the over-grinding is preferably 1 to 3, more preferably 2. The invention has no special limit on the over-grinding time, and the over-grinding time is calculated according to the processing amount and the over-grinding transmission rate in the actual production process.

In the present invention, the manner of development is preferably agitation; the development time is preferably 2 to 4 hours, and more preferably 2.5 to 3.5 hours; the development temperature is preferably 170-178 ℃, and more preferably 173-178 ℃; the stirring speed for development is preferably 150 to 300rpm, more preferably 150 to 250 rpm.

The preparation method provided by the invention has the advantages of simple process, easily-controlled conditions, wide and easily-obtained raw material selection and low cost, is suitable for large-scale production and has wide application prospect, and common No. 70 matrix asphalt is adopted for modification.

The invention provides a seal coat hydraulic asphalt which is prepared from the following raw materials: 100 parts of base asphalt; 5-9 parts of modifier; 4-14 parts of ductility enhancer; 0.2 to 0.35 weight portion of stabilizer; the modifier is SBS modifier. Compared with the prior art, the seal layer hydraulic asphalt provided by the invention adopts specific content components, realizes better integral interaction, has higher softening point and excellent high-temperature performance, is not easy to flow when being used for a seal layer, and has good high-temperature stability; the penetration degree is large, the low-temperature performance is excellent, the low-temperature brittleness of the asphalt is improved, and the asphalt sealing layer can not be cracked even below the water surface in winter; meanwhile, the low-temperature flexibility is good, and the high-temperature flexible cable has excellent deformability.

In addition, the preparation method provided by the invention has the advantages of simple process, easily-controlled conditions, wide and easily-obtained raw material selection and low cost, is suitable for large-scale production and has wide application prospect, and common No. 70 matrix asphalt is adopted for modification.

To further illustrate the present invention, the following examples are provided for illustration. The SBS modifier YH-791 (Yueyangshi) used in the following examples of the invention was linear SBS YH-791, as white short cylindrical particles, produced by the oil division of Yueyangshi, China petrochemical; the ductility enhancer is Manteck 4# and is produced by eastern Manteck petrochemical company; the stabilizer is HMD-2, gray yellow powder, the melting point is more than or equal to 110 ℃, and the apparent density is 0.6-0.9 g/cm³Produced by Shandong Yingrunfengbo stone oil technology Co., Ltd.

Example 1

Sample preparation is carried out on matrix asphalt (Haiyun No. 70) at 135 ℃, heating to 170 ℃, adding 14 wt% of ductility agent and 9 wt% of SBS modifier YH-791 (Yueyanite), swelling for 10min, grinding, wherein the asphalt grinding temperature is 175 ℃, the grinding head temperature is 130 ℃, after two times of grinding, adding 0.3 wt% of stabilizer, stirring and developing for 2.5h, the development temperature is 173 ℃, and the rotating speed is 250rpm, thus obtaining the sealing layer hydraulic engineering asphalt.

Example 2

Sample preparation is carried out on matrix asphalt (Haiyun No. 70) at 135 ℃, the sample is heated to 170 ℃, 11 wt% of ductility agent and 9 wt% of SBS modifier YH-791 (Yueyanite) are added, swelling is carried out for 10min, over-grinding is started, the asphalt over-grinding temperature is 175 ℃, the grinding head temperature is 135 ℃, after two times of grinding, 0.3 wt% of stabilizer is added, stirring and development are carried out for 3.5h, the development temperature is 178 ℃, and the rotating speed is 150rpm, thus obtaining the sealing layer hydraulic engineering asphalt.

Example 3

Melting matrix asphalt (Haiyun No. 70) at 135 ℃, heating to 170 ℃, adding 6 wt% of ductility enhancer and 5 wt% of SBS modifier 1301-1 (Ningbo-length honggao-Kong), swelling for 10min, starting to grind, grinding asphalt at 175 ℃, grinding head at 130 ℃, grinding once, adding 0.3 wt% of stabilizer, stirring and developing for 2h, at 175 ℃, rotating at 250rpm, and obtaining the seal layer hydraulic asphalt.

Example 4

The matrix asphalt (Haiyun No. 70) is subjected to sample preparation at 135 ℃, heated to 170 ℃, added with 6.5 wt% of ductility enhancer and 6 wt% of SBS modifier 1301-1 (Ningbo-length honggao-Kong), swelled for 10min, and ground, the asphalt grinding temperature is 175 ℃, the grinding head temperature is 135 ℃, after two times of grinding, added with 0.3 wt% of stabilizer, stirred and developed for 3h, the development temperature is 173 ℃, and the rotation speed is 180rpm, thus obtaining the seal layer hydraulic engineering asphalt.

Example 5

Melting matrix asphalt (Zhonghai No. 70) at 135 ℃, heating to 170 ℃, adding 11 wt% of ductility agent and 9 wt% of SBS modifier 1301-1 (Ningbo-honggaokouke), swelling for 10min, starting to grind, grinding asphalt at 175 ℃, grinding head at 130 ℃, grinding for three times, adding 0.3 wt% of stabilizer, stirring and developing for 2h, at 173 ℃, rotating at 200rpm, and obtaining the seal layer hydraulic asphalt.

Example 6

Melting matrix asphalt (Zhonghai No. 70) at 135 deg.C, heating to 170 deg.C, adding 6.5 wt% ductility agent and 6 wt% SBS modifier 1301-1 (Ningbo length honggao Ke), swelling for 10min, grinding at 175 deg.C, grinding head temperature 130 deg.C, grinding twice, adding 0.3 wt% stabilizer, stirring and developing for 2h, developing temperature 175 deg.C, and rotating speed 200rpm to obtain the final product.

It should be noted that: in examples 1 to 6, the same production apparatus was used, the amount of primary processing was 150 tons, and the double-mill conveying rate was about 40 tons/h, so the over-milling time was about 4 hours, and the double-mill conveying rate was slightly adjusted according to the amount of the modifier added, and the index was not affected.

The performance of the seal coat hydraulic asphalt provided in examples 1 to 6 was tested, and the results are shown in table 1.

Table 1 various performance data of seal coat hydraulic asphalt provided in examples 1-6

As can be seen from Table 1, the seal coat hydraulic asphalt provided by the invention has a higher softening point (excellent high-temperature performance), is not easy to flow when used in a seal coat, and has good high-temperature stability; the penetration degree is high, the low-temperature performance is excellent, and low-temperature embrittlement can be effectively prevented; meanwhile, the low-temperature flexibility is good, and the high-temperature flexible cable has excellent deformability.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.