JPH0261208A - Manufacture of asphalt paving mixture - Google Patents

Abstract

PURPOSE:To manufacture quality asphalt having mixture by effectively adding asphalt to materials for the mixture at the stage of mixing. CONSTITUTION:In accordance with the rate of mixture for asphalt paving mixture for shipment, required aggregates are taken out from an aggregate bin 4, and required quantity is determined at an aggregate batcher 11. Pulverized stones delivered from a pulverized stone bin 6 are weighed at a pulverized stone batcher 12 to determine the required quantity. Reclaimable wastes are weighed, in accordance with the rate of mixture to the new aggregates, at a reclaimable waste weighing tank 13. The new aggregates and the pulverized stones, respectively taken out from the aggregate batcher 11 and the pulverized stone batcher 12, are thrown into a mixer 14 for dry mixing, that is performed for a mixed period of time for mixing of the new aggregates and the pulverized stones. Then molten asphalt, weighted at an asphalt batcher 15, is added thereto for wet mixing, that is performed for a fixed period of time to let the molten asphalt adhere to the new aggregates and the pulverized stones. After this, the reclaimable wastes are thrown into the mixer for mixing, a that is performed for a fixed period of time to let the reclaimable wastes uniformly mix with the other materials.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for producing an asphalt mixture that is a road paving material, and particularly relates to a method for producing an asphalt mixture mixed with asphalt pavement waste.

[Prior art] Asphalt pavement waste material (hereinafter referred to as "waste material") dug up during road construction, etc. has come to be reused, and most of it is recycled in the form of being mixed into newly manufactured asphalt mixtures. has been done.

Generally, a waste material storage bin is installed in the plant main body of a known asphalt plant, or a waste material storage silo is provided on the side of the plant main body, and the waste material at room temperature or heated is temporarily stored, and the asphalt is transferred to the mixer installed in the plant main body. When the mixture is manufactured, a predetermined amount of waste wood is mixed in with various materials and the mixture is adjusted to reuse the waste material.

[Problems to be solved by the present invention] However, in the conventional mixing process, a predetermined amount of new aggregate, stone powder, and waste materials are sequentially introduced and dry mixed, and then a predetermined amount of asphalt is added. Asphalt mixtures are manufactured by adjusting the mixture, but there are doubts about equating waste materials with new aggregates and feeding them into a mixer at the early stage of mixing, and then adding asphalt to this. The waste material already has asphalt attached to it, and adding asphalt to it in the same way as new aggregate cannot be said to be an effective use of asphalt, and the amount of asphalt that will be distributed to the new aggregate will decrease accordingly. Alternatively, adding more asphalt to the rows results in the use of more asphalt than necessary, which is not desirable.

Therefore, in view of the above points, the present invention proposes a method for producing a high-quality asphalt mixture by effectively adding asphalt to the mixing material in the mixing stage when producing an asphalt mixture containing waste materials. The purpose is to

[Means for Solving the Problems] In order to achieve the above object, the present invention introduces new aggregate and stone powder into a mixer, performs dry mixing for a predetermined time, then adds molten asphalt and performs wet mixing for a predetermined time. The present invention provides a method for producing an asphalt mixture, characterized in that the asphalt mixture is mixed and adjusted by adding waste materials.

[Function] According to the present invention, new aggregate and stone powder are put into a mixer and dry mixing is performed, and molten asphalt corresponding to that amount is added and wet mixing is performed, so that the asphalt becomes new aggregate and stone powder. After mixing thoroughly, waste material is added and mixed, so the required new aggregate can be effectively adhered to with the minimum amount of asphalt required.
A high quality asphalt mixture can be produced.

[Example] The present invention will be explained in detail below.

FIG. 1 is a schematic diagram of an asphalt plant, where l is a dryer for heating new aggregate, and the new aggregate heated and dried in the dryer 1 is lifted by a hot elevator 2 and sieved by a vibrating sieve 3. Aggregate storage bin 4
are stored according to particle size. Further, the stone powder is lifted up to the upper part of the plant body by a stone powder elevator 5 and stored in a stone powder storage bin 6. The waste material is discharged from the waste material hopper 7, conveyed by a belt conveyor 8, lifted up to the upper part of the plant body by an elevator 9, and stored in a waste material storage bin IO.

Although this waste material storage bin 1o is designed to store waste material at room temperature, the waste material discharged from the waste material hopper 7 may be heated using a heating device and then stored.

Below the storage bin, there is an aggregate measuring tank 11 and a stone powder measuring tank 1.
2. A waste material measuring tank 13 is provided, and the materials measured in each measuring tank are put into a lower mixer 14, and one ring of molten asphalt is measured and added in an asphalt measuring tank 15 for mixing.

Next, the manufacturing method of asphalt mixture (mixing method)
Let's talk about.

According to the composition of the asphalt mixture to be shipped, a predetermined amount of aggregate is discharged from the aggregate storage bin 4 and measured in a predetermined amount in an aggregate measuring tank 11. Stone powder is discharged from a stone powder storage bin 6 and a predetermined amount in a stone powder measuring tank 12. Weigh. Then, an amount of asphalt corresponding to these amounts is measured in an asphalt measuring tank 15.

The waste material is weighed in a waste material measuring tank 13 according to its mixing rate with the new aggregate.

First, the new aggregate and stone powder are discharged from the aggregate measuring tank 11 and the stone powder measuring tank 12 and put into the mixer 14, and dry mixing is performed for a predetermined period of time to mix the new aggregate and stone powder. Subsequently, molten asphalt measured in the asphalt measuring tank 15 is added and wet mixing is performed for a predetermined period of time to adhere the asphalt to the new aggregate and stone powder. After that, the waste material is put in and mixed for a predetermined period of time to uniformly mix the waste material and other materials.

[Effects of the Invention] As described above, in the present invention, new aggregate and stone powder are put into a mixer and dry mixing is performed, followed by adding molten asphalt corresponding to that amount and performing wet mixing. After mixing sufficiently with new aggregate and stone powder, waste material is added and mixed, so that the required new aggregate can be effectively attached to the required minimum amount of asphalt to produce a high-quality asphalt mixture. Can be done.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of an asphalt plant. l... Dryer 4... Aggregate storage bin 6... Stone powder storage bin ■... Aggregate measuring tank 2... Stone powder measuring tank 3... Waste material measuring tank 14... Mixer 5...・Asphalt measuring tank

Claims (1)

[Claims] New aggregate and stone powder are put into a mixer and dry mixed for a predetermined period of time, then molten asphalt is added and wet mixed for a predetermined period of time, and then waste materials are added and mixed for adjustment. Asphalt mixture manufacturing method.