CN114105527B - Permeable asphalt and preparation method thereof - Google Patents

Abstract

The application relates to the field of roadbed materials, and particularly discloses permeable asphalt and a preparation method thereof, wherein the permeable asphalt comprises the following raw materials in parts by weight: 50-70 parts of petroleum asphalt, 300 parts of crushed stone 200-; the preparation method comprises the following steps: heating and stirring the 70 # petroleum asphalt uniformly, adding the rest raw materials into the mixture, stirring the mixture, and finally adding water into the mixture, and stirring the mixture uniformly to obtain finished asphalt; in addition, the asphalt prepared by the method has the advantage of good water permeating effect.

Description

Permeable asphalt and preparation method thereof

Technical Field

The application relates to the field of roadbed materials, in particular to permeable asphalt and a preparation method thereof

Background

Bitumen is a petroleum oil of high viscosity that is used primarily as a substrate for roads and also in other paved areas such as airport runways, parking lots, and sidewalks.

Along with the acceleration of city construction pace, the earth's surface in city is slowly covered by bituminous paving, bituminous paving pavements are simple, the low price, it is practical pleasing to the eye, it is very convenient to have brought for people's life, but has brought some harm to the ecosystem in city, bituminous paving is waterproof, has blockked rainwater infiltration underground, make groundwater can not obtain supplementing, the groundwater level constantly descends, thereby destroyed whole ecological environment, in addition, the rainwater that is difficult to permeate ground is amassed in the sunken department on road surface, bring the puzzlement for pedestrian and vehicle.

Disclosure of Invention

In order to overcome the defect that the asphalt pavement is difficult to permeate water, the application provides permeable asphalt and a preparation method thereof.

The permeable asphalt and the preparation method thereof adopt the following technical scheme:

in a first aspect, the present application provides a permeable asphalt, which adopts the following technical scheme:

the permeable asphalt comprises the following raw materials in parts by weight: 50-70 parts of 70 # petroleum asphalt, 300 parts of gravel 200-.

By adopting the technical scheme, the foaming agent sodium dodecyl sulfate is added into the matrix asphalt, the foaming agent foams in the asphalt when meeting water, the asphalt is properly stirred, large bubbles in the asphalt are broken, only a plurality of small holes are left, after the asphalt is dried, the small holes are favorable for water seepage to the underground, the coral sand has the holes, and the water seepage rate is improved together with the sodium dodecyl sulfate.

The foaming agent and the coral sand enable the compressive strength of the asphalt pavement to be reduced, raw material coconut fiber is continuously added into the asphalt, the coconut fiber is high in tensile strength and can increase the compressive strength of the pervious asphalt, and in addition, the coconut fiber also has good water absorption capacity and accelerates the pavement water seepage speed.

Optionally, the crushed stone is one or more of basalt and diabase.

By adopting the technical scheme, the basalt has high compressive strength and high frost resistance and weathering resistance; diabase has high compressive strength and is resistant to abrasion.

Optionally, the particle size of the crushed stone is 0.1-0.8 cm.

By adopting the technical scheme, the particle size of the crushed stone is large, the bonding area of the crushed stone and the matrix asphalt is reduced, and the compressive strength of the asphalt is reduced; the particle size of the broken stone is too small, and the compressive strength of the asphalt pavement is small.

Optionally, the bactericide is one or more of benzalkonium chloride or dodecyl trimethyl ammonium chloride.

By adopting the technical scheme, the benzalkonium chloride has high-efficiency sterilization capability and certain oil removal and deodorization capabilities; the dodecyl trimethyl ammonium chloride has stable chemical performance, heat resistance, light resistance, pressure resistance, strong acid and alkali resistance, and good antistatic and bactericidal performance.

Optionally, the anti-aging agent is one or more of silicon powder, carbon black and rubber powder.

By adopting the technical scheme, the silicon powder, the carbon black and the rubber powder are excellent physical anti-aging agents.

Optionally, the high-viscosity adhesive is a two-component polyurethane adhesive.

By adopting the technical scheme, the two-component polyurethane adhesive has the advantages of high bonding strength, freeze thawing resistance, high temperature resistance, high drying speed and good storage performance.

Optionally, the length of the coconut fiber is 1-3cm, and the coconut fiber is added into a urea solution with the mass concentration of 4%, steamed for 2h and dried.

By adopting the technical scheme, the coconut shell fiber is too long and is not beneficial to transporting moisture, and the coconut shell fiber is too short and is not beneficial to enhancing the compressive strength; the coconut fiber treated by the urea solution has enlarged pores and enhanced water absorption capacity.

Optionally, the particle size of the coral sand is 0.1-1.0 cm.

By adopting the technical scheme, the coral sand has small particle size and low water conveying efficiency; the too large grain size of coral sand is not favorable for the compressive strength of the permeable asphalt.

In a second aspect, the application provides a method for preparing permeable asphalt, which adopts the following technical scheme:

a preparation method of permeable asphalt comprises the following steps:

s1, heating 50-70 parts of 70 # petroleum asphalt to 180 ℃, and uniformly stirring;

s2, adding 300 parts of macadam 200-;

s3: and adding 3-5 parts of water into the asphalt mixture, and uniformly stirring to obtain an asphalt finished product.

In summary, the present application has the following beneficial effects:

1. the foaming agent sodium dodecyl sulfate is added into the matrix asphalt, holes formed by the foaming agent are favorable for asphalt water seepage, and the coral sand has holes and is cooperated with the foaming agent to further improve the water seepage rate; the foaming agent reduces the compressive strength of the asphalt pavement, and the coconut fiber is continuously added into the asphalt, so that the coconut fiber has high tensile strength, the compressive strength of the pervious asphalt can be increased, and in addition, the coconut fiber also has good water absorption capacity, and the pavement water seepage speed is accelerated;

2. benzalkonium chloride has high-efficiency sterilization capability and certain deoiling and deodorizing capabilities; the dodecyl trimethyl ammonium chloride has stable chemical performance, heat resistance, light resistance, pressure resistance, strong acid and alkali resistance, and good antistatic and bactericidal performance.

Detailed Description

Source of raw materials

The starting materials used in the examples are all commercially available:

70 # Petroleum asphalt from Youze Hao chemical Co Ltd,

the coral sand is from Hebei Jie Gui mineral products Co., Ltd,

sodium dodecyl sulfate is available from Jinyongshou chemical Co., Ltd,

the coconut fiber is from Shandong gold and environmental protection materials Co,

basalt comes from Huixin mining processing factory in Lingshu county,

diabase is from pyroxene building materials ltd in the country of Pink,

benzalkonium chloride is available from Shandong Tuihua Biotech limited,

dodecyl trimethyl ammonium chloride is from Jinnan Rongzheng chemical Co,

the silicon powder is from a processing plant of Toronto mine products in Lingshui county,

the carbon black is from Zhengzhou city source chemical industry Co., Ltd,

the rubber powder is from mineral processing factories of nan Yi in Ling shou county,

the two-component polyurethane adhesive comes from Zibo rainbow photo industry and trade Co,

urea is available from Dada Biotech, Inc., Shandong.

Examples

Example 1

The permeable asphalt comprises the following raw materials in parts by weight: 50kg of petroleum asphalt, 200kg of basalt broken stone with the particle size of 0.1cm, 3kg of benzalkonium chloride, 2kg of silicon powder, 3kg of two-component polyurethane adhesive, 50kg of coral sand with the particle size of 1.0cm, 3kg of water, 5kg of sodium dodecyl sulfate and 70kg of coconut shell fiber with the length of 1 cm.

A preparation process of permeable asphalt comprises the following steps:

s1, heating 50kg of the 70 # petroleum asphalt to 180 ℃, and stirring uniformly;

s2, adding 200kg of basalt macadam with the particle size of 0.1cm, 3kg of benzalkonium chloride, 2kg of silicon powder, 3kg of two-component polyurethane adhesive, 50kg of coral sand with the particle size of 1.0cm, 5kg of sodium dodecyl sulfate and 70kg to 70 # petroleum asphalt of coconut shell fibers with the length of 1cm into the raw materials, and stirring the raw materials continuously and uniformly to obtain a finished asphalt product;

s3: and adding 3kg of water into the asphalt mixture, and uniformly stirring to obtain an asphalt finished product.

Examples 2 to 9

Examples 2-9 differ from example 1 in the raw material ratios, and the specific raw material ratios are shown in table 1.

TABLE 1 raw material ratios of examples 2-9

The procedure for processing the treated coconut husk fiber in example 9 was as follows: adding untreated coconut fiber into urea solution with mass concentration of 4%, cooking for 2h, and oven drying.

Performance test

And (3) making a Marshall test piece to test the splitting strength by referring to the technical specification (CJJT 190-2012) of the water permeable asphalt pavement or more and the T0730-2011 test asphalt water seepage experiment. The test results are shown in the following table:

TABLE 2 comparison of Water Permeability and cleavage Strength for examples 2-9

	Example 1	Example 2	Example 3	Example 4	Example 5	Example 6	Example 7	Example 8	Example 9
										Coefficient of water permeability/ml/min	1330	1250	1330	1350	1400	1330	1340	1320	1350
Cleavage strength/Mpa	0.9	0.92	0.9	0.95	0.85	0.9	0.91	0.97	0.9

Compared with the example 1, the asphalt of the example 2 is increased, the water seepage coefficient is reduced, and the splitting strength is increased;

compared with the embodiment 1 and the embodiments 3 to 5, the basalt or diabase has little influence on the water seepage coefficient and the splitting strength of the asphalt, and in a certain range, the crushed stone quality is increased, the water seepage coefficient is increased, the splitting strength is increased, the particle size of the crushed stone is increased, the formation of cracks between the crushed stones is facilitated, the water seepage is facilitated, and the splitting strength is reduced.

As can be seen from examples 1 and 6 to 7, benzalkonium chloride or dodecyltrimethylammonium chloride has little influence on the water permeability coefficient and the cleavage strength of asphalt, and the bactericide increases the water permeability coefficient and increases the cleavage strength.

Compared with the embodiment 1, the embodiment 8 has the advantages that the high viscosity agent is increased, the water seepage coefficient is lowered, and the splitting strength is increased;

the coconut shell fiber of example 9 was treated to increase the internal pores and thus the water permeability.

Examples 10 to 19 and comparative examples 1 to 6

Examples 10 to 19 differ from example 1 in the raw material ratios, and the specific raw material ratios are shown in table 1.

TABLE 3 raw material ratios of examples 10-19

Comparative example

Comparative example 1

In comparison with example 1, comparative example 1 did not add sodium lauryl sulfate, and the remaining raw materials were the same.

Comparative example 2

In comparison with example 1, the mass of sodium lauryl sulfate in comparative example 2 is 12kg, and the other raw materials are the same.

Comparative example 3

In comparison with example 1, comparative example 3 has no coral sand added and the remaining raw materials are the same.

Comparative example 4

Compared with example 1, the coral sand in comparative example 4 has a mass of 110kg, and the rest raw materials are the same.

Comparative example 5

In comparison with example 1, no coconut shell fiber was added in comparative example 5.

Comparative example 6

The mass of coconut shell fiber in the comparative example was 85kg compared to example 1.

The water permeability and cleavage strength data for examples 10-19 are shown in the following table:

TABLE 4 comparison of Water Permeability and cleavage Strength for examples 10-19

	Example 10	Example 11	Example 12	Example 13	Example 14	Example 15	Example 16	Example 17	Example 18	Example 19
											Coefficient of water permeability/ml/min	1350	1440	1476	1440	1470	1300	1280	1370	1365	1375
Cleavage strength/Mpa	0.9	0.85	0.82	0.8	0.72	0.92	0.93	0.98	0.99	1.05

The water permeability coefficient and the cleavage strength data of comparative examples 1 to 6 are shown in the following table:

TABLE 5 comparison of Water Permeability and cleavage Strength for comparative examples 1-6

	Comparative example 1	Comparative example 2	Comparative example 3	Comparative example 4	Comparative example 5	Comparative example 6
							Coefficient of water permeability/ml/min	650	1340	1080	1370	1170	1420
Cleavage strength/Mpa	1.2	1.23	1	0.85	0.72	1.05

The data for example 1 compared to example 10 shows that the amount of water has less effect on the permeability coefficient and the split strength of the bitumen within certain ranges.

Compared with comparative example 1, comparative example 2, example 1 and examples 11 to 12, the data show that when sodium dodecyl sulfate is not added, the asphalt has less pores and lower water permeability coefficient, and after the sodium dodecyl sulfate is added, in a certain range, the more the sodium dodecyl sulfate is, the more the pores are, the water permeability coefficient is increased, but the cleavage strength is reduced;

compared with comparative example 3, comparative example 4, example 1 and examples 13-14, the data show that when no coral sand is added, the water permeability coefficient is lower than that of example 1, but the splitting strength is higher, and within a certain range, the more coral sand is, the more coral sand and sodium dodecyl sulfate are formed to form more pores in the asphalt, so that the water permeability coefficient is continuously increased, but the splitting strength is reduced;

by comparing example 1 with examples 15-16, the data shows that, within a certain range, the larger the particle size of the coral sand, the more pores in the asphalt, the greater the permeability coefficient, but the reduced the fracture strength;

example 1 compared to example 17, within certain limits, the length of the coir fibers was increased, the water permeability coefficient of the pitch was increased and the split strength was also increased.

Compared with comparative examples 5-6, example 1 and examples 18-19, the data show that the splitting strength is 0.72MPa when no coconut shell fiber is added in the comparative example 1, the splitting strength is increased to 0.9MPa when the coconut shell fiber is added in the example 1, the water permeability coefficient is also increased to 1330MPa from 1170MPa, and the more the coconut shell fibers are in a certain range, the water permeability coefficient and the splitting strength are increased.

The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.

Claims (6)

1. The permeable asphalt is characterized in that: the material comprises the following raw materials in parts by weight: 50-70 parts of petroleum asphalt, 300 parts of crushed stone 200-;

the length of the coconut shell fiber is 1-3cm, the coconut shell fiber is added into a urea solution with the mass concentration of 4%, and the coconut shell fiber is cooked for 2 hours and then dried;

the particle size of the coral sand is 0.1-1.0 cm;

the bactericide is benzalkonium chloride.

2. The water-permeable asphalt of claim 1, which is characterized in that: the crushed stone is one or more of basalt and diabase.

3. The water-permeable asphalt of claim 1, which is characterized in that: the particle size of the broken stone is 0.1-0.8 cm.

4. The water-permeable asphalt of claim 1, which is characterized in that: the anti-aging agent is one or more of silicon powder, carbon black and rubber powder.

5. The permeable asphalt according to claim 1, characterized in that: the high-viscosity adhesive is a two-component polyurethane adhesive.

6. A process for the preparation of a water-permeable asphalt according to any one of claims 1 to 5, characterized in that: the method comprises the following steps:

s1, heating 50-70 parts of 70 # petroleum asphalt to 180 ℃, and uniformly stirring;

s2, adding 300 parts of gravel 200-;

s3: and adding 3-5 parts of water into the asphalt mixture, and uniformly stirring to obtain an asphalt finished product.