RU2001763C1 - Method and line for production of articles from asphalt-concrete mixture - Google Patents

Abstract

Usage: manufacturing of products from asphalt concrete Summary of the invention: in the manufacture of products from asphalt concrete mixture, a layer of sawdust, a layer of asphalt concrete mixture, laying reinforcement, filling the mold with the mixture, vibration processing of the mixture and cooling of the products are successively loaded into the metal mold. Vibration processing of the mixture is carried out in two stages: first, with a frequency of 25-26 Hz. with an amplitude of 0.73 - 0.78 mm, a vibration intensity of 100-120 cm2 / s3 for 30 - 40 s. Then, a load is heated up to a temperature of 160 ° C. C, and with a pressure value of 0.051-0.052 MPa and vibrate at a frequency of 48-50 Hz. with an amplitude of 0.6 m 1 - 0.72 mm, an intensity of 480-520 cm / s for 90 s, the products are cooled with air with a temperature of from -5 to -25 ° C; C. In the processing line for the manufacture of products from a mixture, a hopper with asphalt mix is located between the sawdust bin and the reinforcement laying boot. The device for vibration processing is made in the form of two posts. The second post has a removable load with a heater. 2 spf-py, 5 il

Description

The invention relates to the building materials industry, in particular to the manufacture of asphalt concrete products.

A known production line for the manufacture of products from asphalt mixture, containing live rolls and metal molds mounted on them with the possibility of their movement by means of drive mechanisms, equipment mounted in the technological sequence, including a hopper with sawdust, a reinforcing station, a device for filling molds with asphalt concrete mixture, an installation for vibration processing of the asphalt mix in the molds.

A disadvantage of the known method and technological line of products from asphalt concrete is the increased consumption of cement in the manufacture of asphalt concrete products and their unsatisfactory quality.

The purpose of the invention is to reduce the consumption of cement and improve the quality of products from asphalt concrete mix.

The goal is achieved by the fact that about the method of manufacturing products from asphalt concrete, which consists in laying reinforcement in metal molds, for some forms of asphalt-concrete mix, vibration processing of the asphalt concrete mix in the molds and cooling the products, vibration processing of the mixture of molds in two forms is carried out in two , first they are exposed to low-frequency vibration according to the principle of vibration mixing of the mixture in a fluidized bed with an oscillation frequency of 25 ..26 Hz, an amplitude of 0.73 ... 0.78 mm, a vibration intensity of 100 ... 120 CMZ / CJ and a vibration time of 30.. 40 s without load, then with once the mixture is subjected to high-frequency vibration with a load of 0.051-0.052 MPa. frequency 48 ... 50 Hz, amplitude 0.60 ..0.72 mm, intensity 480 ... 520

from

cm / s and a vibration duration of 90 s, and the load is heated to 160 ° C before lowering the asphalt concrete mixture (in the form) onto the surface, and the products from asphalt concrete are cooled by air at a temperature of from -5 ° C to -25 ° C. In a production line for the production of asphalt concrete products, containing live rolls and metal molds mounted on them with the possibility of their movement by means of drive mechanisms, equipment mounted in the technological sequence, including a hopper with sawdust, a reinforcement laying station, a device for feeding and laying asphalt concrete mixture into a mold, installation for vibration processing of asphalt concrete mix in molds, installation for vibration processing of mix in molds made in the form of two posts, p whereby the first post (in technological sequence) is intended for vibro-mixing of the asphalt concrete mixture in the molds at a low frequency without load, and the next post is intended for high-frequency compaction of the mixture with the load, which is equipped with a heating device, while the production line is equipped with an additional hopper with asphalt mix for the lower device protective layer of reinforcement installed in front of the installation of reinforcement, and the process line is equipped with a loading trolley and the means of lifting it, and after fasting the high-frequency processing of the asphalt mixture in the molds

cooling chambers installed.

Example. Using the pusher, the metal mold is moved along the live rolls under the sawdust hopper, which feeds a thick layer of sawdust to the bottom of the mold

5 5-7 mm. Then the metal mold is moved under an additional hopper with asphalt concrete mixture and a protective layer of asphalt concrete mixture 30 ... 50 mm thick is placed on the sawdust layer in the metal mold, after which the metal mold is moved to the reinforcement laying station, where the reinforcement is placed on the asphalt concrete mixture the wooden frame and move the metal mold under the paver machine, where it fills the mold with asphalt concrete mix, distributes it using a rotating screw and leveling with smoothing

0 boards. The metal mold is then transferred to a visual inspection post where the quality of filling the mold with an asphalt-concrete mixture is evaluated. After control, the metal mold is set to

5 first post, fix the metal form by means of hydraulic clamps, turn on the vibrator drive, acting on the asphalt mix in the form with a vibration frequency of 25 ... 26 Hz, amplitude 0.73 ... 078

0 mm, vibration intensity 100..120 cm2 / s3 and vibration duration 30. .40 s without load. Vibration of the asphalt mix in this mode is based on the use of the effect

5 thixotropic liquefaction, which reduces the viscosity of bulk and film bitumen, reduces friction and adhesion between mineral constituents. During vibration mixing, contacts constantly occur.

between particles of a mixture of low and high concentrations of bitumen. As a result of this, the process of spontaneous removal of thick bitumen films from the phase interface occurs and part of the bulk bitumen is transferred to the film state. The batch redistribution process continues until the concentration of bitumen on the phase surface is completely equalized. Namely, these parameters help accelerate the process of intensive forced mixing of the asphalt concrete mixture (in metal form) by the principle of vibration mixing of the mixture in a fluidized bed. With this regime of low-frequency vibration exposure, the mixture is prepared to the maximum process for its compaction with minimal energy consumption. Immediately after vibration mixing, the metal mold with the asphalt mixture is installed and secured to the second post, a load with a pressure of 0.051-0.052 MPa, preheated to a temperature of 160 ° C, is placed on the surface of the asphalt concrete mixture and subjected to high-frequency vibration with a frequency of 48. ..50 Hz, amplitude 0.6.,. 0.72 mm, vibration intensity 480 ... 520 cm / s and vibration duration 90 s. By this vibration mode, the optimum macrostructure of the article is formed. Next, the metal mold with the product is transported to the cooling chamber, during movement in which it is cooled. Asphalt concrete products cooled in metal molds are transferred to the formwork installation, after which empty, cleaned metal molds are again fed under the sawdust hopper and the cycle of the asphalt concrete product product is repeated in the technological sequence.

Fig. 1 schematically depicts a production line for manufacturing products from an asphalt mix in plan; figure 2 - load with a heating device; Fig. 3 is a side view of a cooling chamber; figure 4 is a section aa in fig.Z. figure 5 is a loading trolley, side view.

The technological line for the manufacture of products from asphalt mixture contains a rotary table 1, roller tables 2, metal molds 3 mounted on them with the possibility of moving them by means of drive mechanisms (not shown in FIG.), A hopper with sawdust 4, an additional hopper 5 with asphalt concrete mixture for the device of the lower protective layer of reinforcement, station 6 for laying reinforcement, asphalt-packing machine 7, central control and control panel 8, station 9 for vibrating mixing of ac altobetonnoy mixture at low frequency without prigruza. and post 10, designed for high-frequency compaction of asphalt mix in molds with a load 11, equipped with a heating device

0 12, rotary table 13, conveyor 14. rotary tables 15. cooling chambers 16 with conveyors 17, rotary tables 18. conveyor 19, formwork installation 20, the cooling chamber 16 having three compartments

5 cooling lines. Each line is a tunnel along which metal molds with the article move.

The technological line is equipped with a loading trolley 21 and means 22 for its

0 lifting and moving.

The production line for the production of asphalt mix works as follows. Metal forms 3 are moved along the live rolls 2 under

5 a hopper with sawdust 4, from which sawdust is fed to the bottom of the metal mold 3, forming a uniform layer with a thickness of 5-7 mm, then the metal mold 3 is transferred to an additional hopper 5 with an asphalt mixture, and the lower protective layer is laid on the sawdust layer in the metal mold 3 from asphalt mixture 30 ... 50 mm thick, after which the metal form 3 is moved to the post 6 laying

5 reinforcement, where reinforcement, for example a wooden frame, is placed on the protective layer of the asphalt concrete mixture, and the metal mold 3 is moved under the asphalt paver 7, where the metal mold

0 3 is filled with the asphalt mixture, spreading it by means of a rotating screw and leveling with a smoothing board. Then the metal mold 3 is moved to the post 8 visual

5 control, where the quality of filling the metal form 3 with an asphalt concrete mixture is evaluated. After control, the metal mold 3 is installed on the first post 9, the metal mold 3 is fixed by means of hydraulic clamps (not shown in Fig.), The vibrator drive is turned on, the asphalt concrete mix in mold 3 is exposed to low-frequency vibration without weights according to the principle of vibration mixing of the asphalt concrete mix 5 in a bale layer with the modes indicated earlier. Immediately after vibration mixing, the metal mold 3 with the asphalt concrete mixture is installed and fixed on the second post 10, on the surface of the asphalt concrete mixture with

the form set load 11 with a pressure value of 0 051 -0,052 MPa. preheated by heating device 12 to a temperature of 160 ° C, the vibrator drive is turned on and subjected to high-frequency vibration with the modes indicated previously. This vibration mode forms the optimal macrostructure of the asphalt concrete product. Next, the metal mold 3 with the product is moved along the live rolls 2 to the turntable 13, which is pushed against the pusher (not shown in FIG.) Onto the conveyor 14, which feeds the metal mold 3 to the rotary table 15, which the pusher collides with (fig. not shown) to a conveyor 17 installed in the cooling chamber 16, from where it is supplied to the rotary tables 18. The cooling chambers 16 operate sequentially, first one line is filled, then the second. and third, From the turntables 18, the metal-cooled products 3 are conveyed by conveyor 19 to the stripping unit 20, where the metal-shaped sides are opened, the product is removed, the metal frame is closed and the sides are closed. Then the empty metal form 3 enters the rotary

table 1 and on the rolling table 2 molding lines. To supply the asphalt mix from the asphalt plant (not shown in Fig.) To the additional hopper 5 and for the asphalt paver machine 7, the production line is equipped with a loading trolley. 21 and means 2 for lifting and moving. An LZh-2 winch was used as a tractor for moving the loading trolley.

The use of the proposed method for manufacturing products from asphalt concrete mix and the technological line allows reducing the consumption of cement with a simultaneous increase in the quality of manufacturing products from asphalt concrete mix.

(56) Rostovtsev A.S. Bitumen-mineral slabs for urban roads M., Stroyizdat, 1976 p. 38

Claims (1)

Formula of Invention I, Method for the manufacture of products from ac, - Feyobetonny mixture comprising a rpyvv in a metallic form of a layer of sawdust, ukpa / if / reinforcement, heating with an unaltered and-1 ° C, filling with a new mixture processing mixture: and OHLZ- KDB ediy, characterized in that. with a thread to reduce the flow rate and improve the quality of the products, before laying the fittings on the sawdust layer. from the asphalt concrete mix layer, and the mixture is vibrated in two stages: first with a frequency of 25 - 26 Hz, amplitude 0.73 - 0.78 mm, the vibration intensity of the SW — 120 cm2 / s3 for 30–40 s, and then the load is set, the temperature is heated to 160 C with a pressure of 0.051–0.052 MPa and vibrate at a frequency of 48–50 Hz, with an amplitude of 0.6 - 0.72 mm, with an intensity of 480 - 520 cm / s for 90 s, and the products are cooled with air with a temperature of (-5) - (-25) С. 2 Technological line for the manufacture of products from asphalt mix, containing live rolls, metal molds mounted on them and a sequentially placed hopper with sawdust, installation fittings, a device for feeding and stacking the mixture into a mold, a device for vibration processing of the mixture in the mold, cooling stations and formwork, characterized in that it is equipped with a hopper for the asphalt mix installed between the hopper with sawdust and the reinforcing station, the loading trolley and its lifting means, and the device for processing of the vibration is in the form of two positions, the second of which has a removable prigruzami the heater.   g O XXX X XXXXXXNA v t gt V - S x wzztfv / .LVffnr.l / g i i i m // v / / enoog L / L /