TWI763590B - Construction method of pavement - Google Patents

Abstract

A construction method for paving road, suitable for applying to an asphalt concrete road, the asphalt concrete road has a base layer on the surface, the construction method for laying the road comprises a preparation step of cleaning and leveling the asphalt concrete road, a A heating step of heating the base layer to 70-120° C. using a heating device, a spraying step, a pressing step, and a test step of performing a slip resistance test on the pavement layer. The spreading step is to uniformly spray a thermoplastic light-colored resin on the base layer at a density of 0.15-0.80 kg per square meter by a spreading device, and then spread a plurality of resins at a density of 3-8 kg per square meter White fine aggregate that forms a pavement layer. In the pressing step, a road roller is used to roll the pavement layer at a pressure of 45-54 kilograms per square centimeter.

Description

Construction method of pavement

The present invention relates to a road construction method, in particular to a road construction method.

The traditional asphalt pavement is paved with asphalt mixed with gravel of a specific particle size, and the paved pavement will show a dark color that is quite easy to absorb radiant heat due to the color of the asphalt, so it will be a lot in the time of strong sunlight. Endothermic, the temperature can reach up to 70 ℃ or more, and the high temperature of the road surface will even affect the heat dissipation of the entire environment, and the ambient temperature will rise accordingly. At present, the awareness of energy saving and carbon reduction is becoming more and more popular, but in summer, in order to cope with the high temperature of the outdoor environment, air conditioners with high energy consumption are generally frequently used to reduce the indoor temperature, so that people can at least stay in a relatively low temperature indoors. Comfortable environment. However, according to the statistics of the Taiwan Electric Power Company, as long as the outdoor temperature increases by 1°C, the power generation must be increased by 6% to meet the demand for electricity. Therefore, it can be seen that the high temperature of the outdoor environment will also affect the implementation of energy saving and carbon reduction, especially in cities with a large pavement area. help.

Therefore, the object of the present invention is to provide a construction method for pavement pavement which can reduce the temperature of the road surface.

Therefore, the construction method for paving pavement according to the present invention is suitable for applying to an asphalt concrete road having a base layer on the surface, and the construction method for paving pavement includes a preparation step, a heating step, a spraying material steps, a pressurizing step, and a testing step.

The preparatory step is to clear and level the asphalt concrete road.

The heating step is to use a heating device to heat the base layer to 70-120°C.

The spraying step is to uniformly spray a thermoplastic light-colored resin on the base layer with a density of 0.15-0.80 kg per square meter by a spreading device, and then spray a thermoplastic light-colored resin on the thermoplastic light-colored resin at a density of 3 per square meter. The density of ~8kg is spread with multiple white fine aggregates to form a pavement layer.

The pressing step is to use a road roller to roll the pavement layer at a pressure of 45-54 kg per square centimeter.

The test procedure is to perform a slip resistance test on the pavement layer.

The effect of the present invention is that: the materials forming the pavement layer in this case are the thermoplastic light-colored resin and the white fine aggregates, so the color is close to white, which is easier to reflect than the dark pavement And isolate the radiant heat to reduce the heat absorption of itself and the asphalt concrete road. The actual test can reduce the temperature of the road surface to about 55 ℃, thereby effectively reducing the ambient temperature of the laying site, which can be of great help to energy saving and carbon reduction.

Referring to FIG. 1 and FIG. 2, it is an embodiment of the construction method for paving pavement according to the present invention. This embodiment is suitable for applying to an asphalt concrete road 2, and includes a preparation step 11, a heating step 12, and a material spreading step 13. A pressing step 14, and a testing step 15. Wherein, the asphalt concrete road 2 has a base layer 20 located on the surface, and the base layer 20 is specifically a material layer formed by uniformly mixing asphalt and gravel.

In the preparation step 11, after measuring the asphalt concrete road 2 to be constructed, clean the debris such as branches, dust, gravel, etc. on the asphalt concrete road 2, and then use asphalt concrete for the defects of pits and cracks. Repair to ensure subsequent construction quality.

The heating step 12 is to use a heating device to heat the base layer 20 to 70-120°C. The heating device preferably uses the existing gas-type asphalt pavement heating device, or can also use oil heating, electric heating, or other heating devices. A device that can be heated evenly, and the heating temperature depends on the construction weather, air temperature, and the physical and chemical properties of the subsequent materials such as the resin softening temperature. For example, on a sunny day at 37°C, it is preferable to heat the base layer 20 to 70°C, that is, the main purpose of the heating step 12 is to maintain the base layer 20 at a slight temperature before the subsequent steps are performed. In a plastic state, if it is at a lower temperature, it must be heated to a higher temperature to avoid rapid cooling due to low temperature.

The spreading step 13 is to uniformly spray a thermoplastic light-colored resin 301 on the base layer 20 with a density of 0.15-0.80 kg per square meter by a spreading device, and then spray a thermoplastic light-colored resin 301 on the thermoplastic light-colored resin at a density of 0.15-0.80 kg per square meter. With a density of 3 to 8 kilograms per meter, a plurality of white fine aggregates 302 with a moisture content of less than 5% are spread to form a pavement layer 30 . Wherein, the thermoplastic light-colored resin 301 is preferably a mixture of petroleum resin and styrene-butadiene rubber, and the white fine aggregate 302 is selected from easily obtained minerals such as calcium carbonate, barium sulfate, talc, etc. Powder, or inorganic fine aggregate such as ceramic fine aggregate, is mainly composed of white powder particles with appropriate hardness and certain impact resistance, and the specific components are not limited to the above.

It should be noted that, in order to comply with the standard specification for paving roads, the white fine aggregate 302 passes through a 0.6 mm (No. 30) square hole test sieve with a weight percentage of 100%, and passes through 0.3 mm (No. 50). The weight percentage of the square hole test sieve is 75~100%, and the weight percentage of the square hole test sieve passing 0.075 mm (No. 200) is 50~100%. In addition, according to the following table 1, the absolute viscosity (poise) of the thermoplastic light-colored resin 301 at 60°C is 250~2500, and the dynamic viscosity (cSt) at 135°C is 3000; the flash point is higher than 232°C; The solubility in vinyl chloride is more than 99%; the penetration under the conditions of 25 ° C, 100 grams, 5 seconds is 35~65 (one tenth of a millimeter). The elastic recovery rate of the thermoplastic light-colored resin under the condition of elongation of 10 cm at 25°C after being passed through a rolling film oven is 60-70%, and the penetration under the condition of 4°C, 200 g, and 60 seconds is 10~15 (one tenth of a millimeter).

Table I: Pilot projects General paving Modified I Modification II Modified III Modified IV Penetration [25℃, 100g] (1/10mm) 65 50 35 35 Viscosity[60℃] (poise) 250(2500) 450(4500) 800(8000) 2500(25000) Viscosity [135℃] (cSt) 3000 3000 3000 3000 Flash point (℃) 232 232 232 232 Solubility in trichloroethylene (%) 99 99 99 99 Elastic recovery rate (%) 60 60 70 70 Penetration [4℃, 200g] (1/10mm) 15 10 10 10

Specifically, the spreading equipment is a spreading vehicle that can store the thermoplastic light-colored resin 301 at a temperature of about 180° C. and has a plurality of nozzles that can be sprayed evenly, or, under consideration of convenience and cost, also It can be operated directly by manpower; and when spreading the white fine aggregates 302, in addition to direct manpower spreading, it can be performed by a spreading truck with a quantitative release function.

Next, the pressing step 14 is to use a road roller to roll the pavement layer 30 with a pressure of 45-54 kg per square centimeter, and the road roller is preferably a three-wheel road roller of 8-12 tons, or a two-shaft roller of 8-10 tons Three wheel rollers. In this embodiment, the wheel track overlapped by the repeated rolling of the road roller is 1/2, and the repeated rolling is repeated 4 to 6 times until the road surface layer 30 is stable. In addition, the speed of the road roller is preferably maintained below 3km/h to avoid uneven indentation.

Finally, in order to ensure that the pavement layer 30 that has been laid is indeed safe for vehicles to drive, the test step 15 is to use an EN13036-4 portable anti-skid test instrument to perform an anti-skid test on the pavement layer 30 to ensure that the surface of the pavement layer 30 is The coefficient of friction conforms to standard specifications.

After the pavement layer 30 is laid, the main materials used are the thermoplastic light-colored resin 301 and the white fine aggregates 302, so the color is close to white. Compared with the original asphalt concrete road 2 which is relatively dark, it is easier to reflect the radiant heat and reduce the heat absorption of the asphalt concrete road 2 itself and the asphalt concrete road 2 . The actual test in strong sunshine weather proves that the temperature of the pavement layer 30 can be lowered to about 55°C, which is far lower than the asphalt concrete road 2 which has a strong endothermic effect and may be as high as 70°C. When the ambient temperature in which the pavement layer 30 is laid is thereby lowered, the energy consumption of the air-conditioning equipment can be greatly reduced, thereby reducing power generation and electricity consumption and contributing to energy saving and carbon reduction.

To sum up, this embodiment of the construction method for pavement pavement according to the present invention can indeed lay the pavement layer 30 that conforms to the road standard specification and appears white. Since the pavement layer 30 is more likely to reflect radiant heat, it reduces itself and the asphalt concrete The road 2 absorbs heat, thereby effectively reducing the ambient temperature of the paving site, thereby contributing to energy saving and carbon reduction. Therefore, the object of the present invention can be achieved indeed.

However, the above are only examples of the present invention, and should not limit the scope of the present invention. Any simple equivalent changes and modifications made according to the scope of the application for patent of the present invention and the content of the patent specification are still within the scope of the present invention. within the scope of the invention patent.

11: Preparation steps 12: Heating step 13: Sprinkling steps 14: Pressurization step 15: Test steps 2: Asphalt concrete road 20: Base Layer 30: Pavement layer 301: Thermoplastic light-colored resin 302: white fine aggregate

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, wherein: Fig. 1 is a block flow diagram illustrating one embodiment of the construction method of the present invention for laying pavement; and Fig. 2 is a cross-sectional view illustrating a pavement laid on an asphalt concrete road in this embodiment.

11: Preparation steps

12: Heating step

13: Sprinkling steps

14: Pressurization step

15: Test steps

Claims (9)

A construction method for pavement, suitable for applying to an asphalt concrete road, the asphalt concrete road has a base layer on the surface, the construction method for paving the road comprises: a preparation step, cleaning and leveling the asphalt concrete road; In a heating step, a heating device is used to heat the base layer to 70-120°C; in a spreading step, a thermoplastic is uniformly sprayed on the base layer at a density of 0.15-0.80 kg per square meter by a spreading device Light-colored resin, and then spread a plurality of white fine aggregates on the thermoplastic light-colored resin at a density of 3 to 8 kilograms per square meter to form a pavement layer, wherein the thermoplastic light-colored resin is at 60 ℃. The absolute viscosity (poise) is 250~2500, and the dynamic viscosity (cSt) at 135°C is 3000; a pressing step, using a road roller to roll the pavement layer with a pressure of 45~54 kg per square centimeter; and a testing step , and perform the anti-skid test on the pavement layer. The construction method for pavement laying according to claim 1, wherein, in the spreading step, the flash point of the thermoplastic light-colored resin is higher than 232°C. The construction method for pavement laying according to claim 1, wherein, in the spreading step, the solubility of the thermoplastic light-colored resin in trichloroethylene is more than 99%. The construction method for pavement laying according to claim 1, wherein, in the spreading step, the penetration of the thermoplastic light-colored resin at 25° C., 100 grams, and 5 seconds is 35-65 (tenths of a second). one millimeter). The construction method for pavement laying according to claim 1, wherein, in the spreading step, the elastic recovery rate of the thermoplastic light-colored resin under the condition of elongation of 10 cm at 25°C after passing through a rolling film oven is 60~ 70%. The construction method for pavement laying according to claim 1, wherein, in the spreading step, after the thermoplastic light-colored resin is passed through a rolling film oven, the penetration under the conditions of 4°C, 200 grams, and 60 seconds is 10~15 (one tenth of a millimeter). The construction method for pavement laying according to claim 1, wherein, in the spreading step, the white fine aggregate is selected from mineral powder or inorganic fine aggregate. The construction method for pavement laying according to claim 1, wherein, in the spreading step, the water content of the white fine aggregate is less than 5%. The construction method for pavement laying according to claim 1, wherein the percentage by weight of the white fine aggregate passing through the 0.6 mm square hole test sieve is 100%, and the weight percentage passing through the 0.3 mm square hole test sieve is 75-100% %, and the weight percentage passing through the 0.075 mm square hole test sieve is 50~100%.

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