KR101486558B1 - Utilizable method of aggregate difficult to use independently and mixing apparatus using the same - Google Patents

Abstract

The present invention relates to assorted aggregates and a device for mixing the assorted aggregates and, more specifically, to a method for utilizing aggregates and a device for mixing the aggregates, which utilize the aggregates which meet standard but are hard to exclusive usage, and can provide fine aggregates of good quality which meet a Korea industrial standard (KS F 2526). Assorted aggregates of the present invention comprise a first group aggregate having 1.0 to 2.2 of fineness modulus among aggregates out of 2.3 to 3.1 of fineness modulus, and a second group aggregate having 3.2 to 4.0 of fineness modulus. The first group aggregate and the second group aggregate are mixed to 2.3 to 3.1 of fineness modulus. A weight ratio according to mix of the first group aggregate and the second group aggregate is 3:7 to 6:4.

Description

[0001] The present invention relates to a mixing apparatus for mixing fine aggregate and fine aggregate,

The present invention relates to a mixed fine aggregate and a mixing apparatus thereof, and more particularly, to a mixed fine aggregate and a mixing apparatus using the fine aggregate which is unsuitable for the specification and is difficult to use alone.

Concrete usually refers to a mixture of coarse aggregate such as cobbles and fine aggregate such as sand in cement, kneaded with water, or hardened.

The standard required for the concrete is shown in the standard specification of concrete. The concrete is composed of cement, water, fine aggregate, coarse aggregate and admixture.

According to the concrete standard specifications of the double fine aggregate, the weight percentage of the aggregate passing through the sieve body of the sieve is 10 mm 100%, 5 mm 95-100%, 2.5 mm 80-100%, 1.2 mm 50-85% It is an aggregate that satisfies the particle size distribution of 25 to 60%, 0.3 to 10 to 30% and 0.15 to 2 to 10%. In addition, it is clean, strong, durable, dust, soil, organic impurities , Salt, and other harmful substances.

In addition, the shape should be a cubic shape or a shape close to a sphere, and it should have a surface structure having a large adhesion force with cement. If it is too light, there is a risk of material separation. Therefore, .

Although the steel sand used in the above-mentioned fine aggregate material is principally used, the use amount of the steel sand is gradually decreasing from the viewpoint of environmental protection. In order to replace this, the use amount of the sea sand, crushed sand or reclaimed sand is gradually increasing to be. However, even in the case of sea sand, similar to river sand, it may cause coastal destruction. Therefore, the sampling method is changed from the sampling near the coast to the ocean sampling method, And there are many disadvantages such as the desire of the city.

In addition, the crushed sand is poor in quality, and the additional cost to treat it is increased. In the case of recycled sand, there are many difficulties to apply to high quality concrete such as unstable quality, and it is satisfied with Korean Industrial Standard (KS F 2526) It is difficult to make.

As part of efforts to replace conventional fine aggregates, alternative aggregates such as blast furnace slag aggregate, copper slag aggregate and lead slag slag have been developed and formulated in accordance with the Korean Industry Standard (KS) standard. .

However, the above-mentioned slag-based aggregate has a problem that its chemical stability is insufficient, its use procedure is complicated, and its use range is limited.

On the other hand, in the Korean Patent Registration No. 10-0371446 (Apr. 24, 2003), a recycling plant recycled from waste paper is posted. The recycled recycled waste market is firstly crushed by using a breaker to separate the waste aggregate and the rebar inside the pulmonary column, and the waste aggregate is reused The recycled coarse aggregate obtained by separating the fine aggregate and the coarse aggregate after the second crushing process and the fine aggregate separated through the second crushing process are sieved with a 1.2 mm sieve and the recycled aggregate passing through and the aggregate passing through the aggregate having a weight ratio of 1: And a cement paste composed of a mixed material of water and cement.

Such conventional recycling cost can not increase the structural strength of the recycled waste price by using the pulmonary pole because the secondary recycling process simply mixes the separated fine aggregate and the waste aggregate with a ratio of 1: 1.

On the other hand, there is a problem that the mixing ratio can not be adjusted because the aggregate is not smoothly discharged from the hopper, which is stored in the fine aggregate when the aggregate is mixed by using the fine aggregate mixing device.

It is an object of the present invention to provide a fine fine aggregate which is unsuitable for standard use and which is difficult to be used singly, thereby preventing environmental degradation and depletion of resources, facilitating the supply and demand of aggregate, Which is capable of improving the reliability of the mixed fine aggregate and the mixed fine aggregate.

Another problem to be solved by the present invention is to prevent the mixing failure due to poor feeding of the fine aggregate for mixing by detecting whether the aggregate is discharged from each hopper in which the fine aggregate is mixed when the fine aggregate is mixed, And a mixing device for mixing the fine aggregate.

In order to accomplish the above object, the present invention provides a fine aggregate of a first aggregate having an aggregation rate of 1.0 to 2.2, a second aggregate aggregate having an aggregation rate of 3.2 to 4.0, Group aggregate and second group aggregate are blended so as to have a granulation ratio of 2.3 to 3.1,

 And the weight ratio of the first group aggregate to the second group aggregate is 3: 7 to 6: 4.

In order to achieve the above object, the present invention provides a mixing apparatus for mixing fine aggregate, comprising: a first loading hopper for storing first aggregate aggregates having a granulation ratio of 1.0 to 2.2 among fine aggregates out of a granulation ratio of 2.3 to 3.1;

 A second loading hopper in which a second group aggregate having an assembly ratio of 3.2 to 4.0 is stored,

First and second weighing conveyors installed to correspond to the outlets of the first and second loading hoppers, respectively;

A conveying conveyor installed at a lower portion of the first and second weighing conveyors to convey the fine aggregates falling from the first and second weighing conveyor rotors;

 And a mesh-type drum having a net-like shape in which a chute at an exit side of a conveying conveyor is inserted into an inlet and is rotatably installed in a frame, to obtain a compounding aggregate having an assembly ratio of 2.3 to 3.1 by blending fine aggregates conveyed through the conveying conveyor And a part is provided.

In the present invention, whether or not the first group aggregate is discharged from the first loading hopper is detected in each of the first weighing conveyor and the second weighing conveyor, and whether the second group aggregate is discharged from the outlet side of the second loading hopper And an impact detection unit having an impact unit for impacting the first input hopper or the second input hopper by a signal sensed by the detection unit.

The chute further includes a first mixing unit for mixing the mixed aggregate discharged from the conveying conveyor in a first order. The first mixing unit includes a plurality of spiral passage portions formed in a longitudinal direction of the chute and bent in a spiral manner, and a mixing passage portion provided at an end of the spiral passage portions. The mutually contacting passage portions are provided with at least one stirring vane that communicates with each other in the longitudinal direction and crosses the mixing passage portion.

And a third loading hopper installed with the second loading hopper and equipped with a third weighing conveyor at the outlet to adjust the rate of assembly to the conveying conveyor.

As described above, according to the present invention, two or more fine aggregates are mixed and blended at an appropriate ratio, so that they can be utilized as fine fine aggregate. Further, by using unsuitable fine aggregate, environmental degradation and resource depletion can be prevented, .

In addition, the present invention can prevent the mixing failure due to feeding defects from the first and second loading hoppers, and can prevent the mixing failure due to the amount of feed conveyed by the conveying conveyor

1 to 9 are graphs showing the passage rates of aggregates,
10 is a front view showing an embodiment of a compounding aggregate mixing apparatus according to the present invention,
11 is a side view of the compounding aggregate mixing apparatus shown in FIG. 10,
Fig. 12 is a side view showing the first and second weighing conveyors in Fig. 11,
Fig. 13 is an enlarged view of the first and second weighing conveyors shown in Fig. 12,
14 is a side sectional view of the mixing portion,
15 is a plan view of the mixing portion,
Fig. 16 is an excerpt of the suits. Fig. 16 is a partially cutaway perspective view showing the first mixing unit,
17 is a side view showing another embodiment of the compounding aggregate mixing apparatus according to the present invention,
FIG. 18 is a side view illustrating the first, second, and third loading hoppers shown in FIG. 17; FIG.

The present invention relates to a mixing apparatus for mixing fine aggregates and mixing fine aggregates of high quality and mixing the same, and one embodiment thereof will be described with reference to the accompanying drawings.

The fine aggregate according to one embodiment of the present invention is produced by recovering fine aggregates having different sizes from a crushing factory of a steel mill or a building, and mixing them together.

The recovery of the fine aggregate for compounding is carried out by separating a first group aggregate having an aggregation ratio of 1.0 to 2.2 and a second group aggregate having an aggregation ratio of 3.2 to 4.0.

The first and second aggregate aggregates can be recovered through a conventional sorting process of fine aggregates at crushing sites such as steelworks, concrete, and the like. For example, in order to produce concrete, cement, water, fine aggregate, coarse aggregate and admixture are required. According to the standard specification of concrete specified in the Korean Industrial Standards, the weight percentage of fine aggregate passing through the sieve is 10 mm 100%, 5 mm 95-100%, 2.5 mm 80-100%, 1.2 mm 50-85%, 0.6 mm 25 To 60%, 0.3 mm 10 to 30%, and 0.15 mm 2 to 10%.

The fineness modulus (FM) of the fine aggregate satisfying the above standard is 2.3 to 3.1. Here, the granulation ratio means a value obtained by performing sieving and dividing the total remaining rate of the amount remaining in each sieve by 100. Inadequate aggregate materials that fall outside the range of the above-mentioned granulation ratio can not be used as concrete materials but are used for disposal or landfilling.

The first group aggregate having a granularity of 2.2 or less or the second group aggregate having a granularity of 3.2 or more, that is, the first group aggregate having an erection ratio of 1.0 to 2.2 and the second group aggregate having an erection ratio of 3.2 to 4.0, do. Aggregates with a modulus of less than 1.0 are not suitable for the washing test (0.08 mm permeability test), and when the modulus exceeds 4.0, they are not suitable for the fine aggregate. The first group aggregate is a cement having an aggregation ratio of 1.0 to 2.2, and the second group aggregate belongs to a crown having an aggregation ratio of 3.2 to 4.0. However, at least one selected from the first group aggregate and the second group aggregate may be a ferronickel slag, which is a by-product of a steel mill.

The first group aggregate and the second group aggregate recovered as described above are mixed with each other to obtain an aggregate having a granulation ratio of 2.3 to 3.1.

Preferably, the mixing of the fine aggregate is carried out by mixing the first group aggregate to the second group aggregate at a weight ratio of 3: 7 to 6: 4. When the above ratio is blended, a fine aggregate suitable for the specification can be obtained in both the granularity, the density and the water absorption rate. Meanwhile, as described above, the third aggregate can be further mixed with the aggregate of the first and second aggregate aggregates to improve the quality of the aggregate in the finished state. The second aggregate may be made of ferronickel or sand collected from a river.

 A mixing apparatus for mixing the above mixed fine aggregates is shown in Figs. 10 to 16. Fig.

The mixing apparatus 10 for mixing the mixed fine aggregate according to the present invention comprises first and second loading hoppers 20 and 30 and a discharge port 21 and 31, respectively. The first and second weighing conveyors 40, A conveying conveyor 60 for conveying the aggregate material modified by the first and second weighing conveyors 40 and 50 and a mixing unit 70 for mixing the fine aggregate materials for mixing conveyed by the conveying conveyor 60 The discharge detecting unit 80 detects whether or not the fine aggregate for mixing is smoothly discharged through the discharge port of the first and second loading hoppers 20 and 30, And a primary mixing unit (90) installed in the chute connecting the mixing unit (70) and primarily mixing the fine aggregates conveyed by the primary conveying conveyors (60).

First and second group aggregates are stored in the first and second loading hoppers 20 and 30 for storing the fine aggregate and the first group aggregate and the second group aggregate A shutter for interrupting the discharge may be installed. As described above, the loading hopper is not limited to the first and second loading hoppers 20 and 30, and a plurality of the loading hoppers may be further provided for mixing the fine aggregate. Each loading hopper transports the fine aggregate discharged therefrom It is preferable to install it in an in-line state so that it can be smoothly conveyed by the conveyor 60. As shown in FIGS. 17 and 18, the third loading hopper 100, in which the second group aggregate for storing the quality of the mixed aggregate is stored, is disposed adjacent to the second loading hopper 30, It can be installed inline with the hopper.

The first group of aggregates is injected into the first loading hopper 20 through the opened upper part and stored. The first group aggregate is an aggregate having an aggregation ratio of 1.0 to 2.2. The second group of aggregate is stored in the second loading hopper 30. The second group aggregate is an aggregate having a granulation ratio of 3.2 to 4.0. The aggregate of the first group aggregate or the second group may be made of ferronickel slag as described above.

The first, second, and third loading hoppers 20, 30, 100 are spaced apart from the ground by the support frames 20a, 30a so that the first, second, and third loading hoppers 20, The third weighing conveyor 40 (50) and the third weighing conveyor (50) installed at the discharge port (101) of the third weighing hopper (100) 110) can be easily installed on the upper side of the conveying conveyor (60).

The first weighing conveyor 20 installed adjacent to the first outlet 21 of the first loading hopper 20 includes a first head drum 43 rotatably installed on both sides of the first frame 42, A plurality of first driving rollers 45 installed at predetermined intervals in the frame 42 and a plurality of second driving rollers 45 mounted on the first head drum 43 and the first tail drum 44 And a first conveying belt 46 on an endless track supported by the first driving rollers 45. [ And a first driving motor 47 for rotating the selected one of the head drum 43 and the tail drum 44 to measure the amount of discharged first aggregate aggregate.

The first weighing conveyor 40 adjusts the number of revolutions of the first driving motor 47 through which the aggregate drives the first conveyor belt 46 through the first outlet 21 of the first loading hopper 20 Emissions of aggregate can be controlled and the weight can be adjusted by adjusting the volume and specific gravity.

The second weighing conveyor (50) has substantially the same structure as the first weighing conveyor (40). The second weighing conveyor 50 includes a second head drum 53 and a second tail drum 54 that are rotatably installed on both sides of the second frame 52, And a second conveying belt on an endless track supported by the second driving rollers 45 by being engaged with the second head drum 53 and the second tail drum 54, (56). And a second driving motor 57 for rotating the selected one of the second head drum 53 or the second tail drum 54 to measure the amount of discharged second group aggregate. The third weighing conveyor 110 installed on the lower side of the third loading hopper 100 has substantially the same structure as the first and second weighing conveyors and therefore will not be described again.

A predetermined amount of aggregate can be discharged from the first and second loading hoppers 20 and 30 through the rotation of the first and second weighing conveyors 40 and 50 as described above. Preferably, the first group aggregate to the second group aggregate is desirably discharged at a weight ratio of 3: 7 to 6: 4. This can be achieved by controlling the number of revolutions of the first and second drive motors 47 and 57 that drive the first and second weighing conveyors 40 and 50, respectively.

The conveying conveyor 60 for conveying the first and second groups of aggregate discharged through the first and second weighing conveyors 40 and 50 may be a conventional belt conveyor, And is inclined to the inlet side of the mash drum 71 of the blending part 70 for supply.

14 to 15, the blending part 70 is used for blending the fine aggregate conveyed by the conveying conveyor 60 and discharged from the chute 65. The blending part 70 is provided with a mash drum And a plurality of support rollers 73 for preventing deformation of the mash drum 72 are installed on the lower side of the mash drum. The mixing frame 71 on the lower side of the mash drum 72 is provided with a discharge hopper 74 through which the mixed fine aggregate that has passed through the mash drum 72 is discharged and on the lower side of the discharge hopper 74 A discharge conveyor 77 for conveying the mixed fine aggregate to be discharged is provided.

The mash drum 72 is cylindrically formed, and the aggregate that is sloped in the mixing unit frame 71 and does not pass through the mash drum 72 is discharged to the outside. The mash drum 72 is rotated by a driving motor, and a cover member 76 for covering the mash drum is provided to prevent dust generated during mixing.

On the other hand, when the discharge of the fine aggregate for mixing is detected from the first loading hopper 20 and the second loading hopper 30 or the first loading hopper 20, the second loading hopper 30 and the third loading hopper 100 And a primary mixing unit (90) installed in the chute and discharged from the conveying conveyor (60).

The discharge detecting unit 80 is installed in the first weighing conveyor 40 and the second weighing conveyor 50 to detect whether or not the first group aggregate is discharged from the first loading hopper 20, A detection unit 81 for detecting whether or not the aggregate material for detecting whether or not the second aggregate aggregate is discharged from the outlet side of the first feed hopper 30, And a shock unit 85 for applying an impact for discharging to the 2-tap hopper 30. The detecting unit 81 further includes an erroneous rate detecting unit (not shown) for detecting the erroneous erroneous ratio of the compounded aggregate to regulate the quality of the mixed aggregate discharged by the compounding unit 70.

The detection unit 81 may be a motor load detection sensor for detecting the load of the first and second drive motors 47 and 57 for driving the first and second weighing conveyors 40 and 50. However, the present invention is not limited thereto, and may be a load cell (Mitsutoshi) installed on the first driving roller 45 or the second driving roller 55 for supporting the belt and detecting whether the fine aggregate is loaded on the belt. In this case, it is installed between a bracket for supporting the first and second driving rollers 45 and 55 and a frame for supporting the bracket. The detection unit 81 is further provided with a detection sensor 102 for detecting the motor load of the third drive motor of the third weighing conveyor 110. [

The impact unit 85 is installed in each of the first, second and third loading hoppers 20, 30 and 100 and may be a vibration vibrator. The vibration vibrator includes a housing, An eccentric cam supported on a rotary shaft for rotating the eccentric cam; and a drive motor provided on the housing for rotating the eccentric cam. The detection unit further includes a control unit (86) for controlling the impact unit (85) by a signal sensed by the detection sensor. The control unit 86 detects the granulation ratio of the compounded aggregate compounded by the discharging unit 70 based on the information detected from the granularity detection sensor, and then selectively outputs the third group aggregate member stored in the third input hopper 100 So that the quality of the erection ratio can be improved.

The detection and discharge unit includes a first support rod that is not shown in the drawing but is supported by the first frame 42 and extends to the inside of the first loading hopper 20 through a first outlet 21, And a second support rod which is supported by the first discharge port 31 and extends into the first loading hopper 20 through the first discharge port 31. The first and second support rods are bent so as not to interfere with the first and second conveyance belts installed in the first and second frames 42 and 52, The first group aggregate in the first and second loading hoppers and the first and second outlet sides of the second group aggregate are shaken by the shaking of the first frame or the second frame so that the aggregates can be smoothly discharged do.

16, the first primary mixing unit 90 includes a partition plate 91 provided at the inlet side of the chute 65 and a discharge port 91 formed at one side of the partition plate 91 A first induction vane 92 which guides the aggregate to the center side and a second induction vane 92 which is provided on the side of the other passage defined by the partition plate 91 on the lower side than the first induction vane 92, A second induction vane 93 for colliding the aggregate discharged by the first induction vane 91 and a second induction vane 93 provided on the outlet side of the chute 65 and guided by the second induction vane 93, And has a helical guiding fringe 95 for guiding it in the circumferential direction. And unit-feathers extending radially from the center of the guide feathers 95, and the inclination angles of the unit feathers are formed in the same direction (clockwise direction).

The first group aggregate, that is, the first group aggregate stored in the first loading hopper 20, is mixed with the aggregate having the granulation ratio of 1.0 to 2.2 in the first loading hopper 20 The first weighing conveyor 40 formed at the lower portion of the first outlet 21 of the conveying conveyor 60 continuously discharges the set amount of the first weighing conveyor 40 toward the conveying conveyor 60. This set amount of discharge can be achieved by controlling the number of revolutions of the first drive motor for driving the first weighing conveyor 40. [

As described above, the first group aggregate is discharged, and at the same time, the second group aggregate, that is, the aggregation rate is 3.2 (%) by the second weighing conveyor 50 from the second loading hopper 40 in the same manner as the first weighing conveyor 0.0 > to 4.0 < / RTI > is discharged to the conveying conveyor 60. A predetermined amount of aggregate can be discharged from the first and second loading hoppers 20 and 30 through the rotation of the first and second weighing conveyors 40 and 50 as described above.

 Preferably, the first group aggregate to the second group aggregate is desirably discharged at a weight ratio of 3: 7 to 6: 4.

As described above, if the discharge of the first group aggregate and the second group aggregate is not smooth due to the viscosity of the aggregate, moisture content, or the like, the discharge is detected by the discharge detector 80. For example, when the first group aggregate is filled in the first loading hopper and the first group aggregate is not smoothly discharged through the first outlet 21, the first driving motor (not shown) of the first weighing conveyor 40 47, and the control unit senses the driving force to drive the impact unit to discharge the first group aggregate from the first loading hopper 20. In the case where the second group aggregate is not discharged from the second loading hopper 30, the discharge is performed in the same manner as described above.

As described above, the first and second aggregate aggregate discharged from the first and second loading hoppers 20 and 30 or the first and second aggregate aggregate discharged from the first, second, and third loading hoppers 20, 30, The second and third group aggregates are compounded by the first compounding unit and then secondarily compounded and sorted by the mash drum 72 of the compounding portion 70.

The first, second and third group aggregates fed by the feeding conveyor 60 or the first, second and third group aggregates fed from the third feeding hopper are passed through the chute 65, 2 induction vanes 92 and 93 and a guide vane 95. In this way, That is, the first, second, and third group aggregates, which are moved to the both sides by the partition plate 91 formed on the entrance side of the chute, are guided and mixed with the first and second induction vanes 92 and 93, And is guided and mixed by the vanes 95 in the rotating direction. The primary and the first aggregate aggregates thus mixed are secondarily mixed while passing through the rotating mash drum 72. The aggregate that has not passed through the mash drum 72 is discharged to the outside through the lower outlet of the mash drum 72.

As described above, the first aggregate aggregate and the second aggregate aggregate are mixed together or alternatively, the first aggregate aggregate having the first, second and third aggregate aggregates are mixed to obtain a good quality aggregate having a granulation ratio of 2.3 to 3.1.

Hereinafter, the present invention will be described with reference to specific experimental examples. However, the following experimental examples are intended to illustrate the present invention in detail, and the scope of the present invention is not limited to the following experimental examples.

1. Preparation of sample

A first group aggregate having a granulation ratio of 1.0 to 2.2 and a second group aggregate having a granulation ratio of 3.2 to 4.0 were prepared from the fine aggregates out of the granulation ratio of 2.3 to 3.1 and subjected to a sieving test and the results are shown in Tables 1 and 2 .

division
Body number (mm)
Assembly rate 10 5 2.5 1.2 0.6 0.3 0.15 PAN Residual amount (g) 0.0 0.0 0.0 20.0 96.0 180.0 190.0 24.0

1.80

Passage (g) 510.0 510.0 510.0 490.0 394.0 214.0 24.0 0.0 Remaining rate (%) 0.0 0.0 0.0 3.9 22.7 58.0 95.3 100.0 Percent Transit (%) 100.0 100.0 100.0 96.1 77.3 42.0 4.7 0.0 Through rate specification 100 95-100 80-100 50 to 85 25 to 60 10 to 30 2 to 10 -

Referring to the above Table 1, as a result of sieving test of the first group aggregate, the granulation ratio was found to be 1.80. It can be seen that the sieve passage ratio of the first group aggregate (hereinafter referred to as the first sample) having an assembly ratio of 1.80 is inadequate to the passage ratio of the fine aggregate specified by Korean Industrial Standard. In FIG. 1, the passing rate of the first sample is shown in a graph.

division
Body number (mm)
Assembly rate 10 5 2.5 1.2 0.6 0.3 0.15 PAN Residual amount (g) 0.0 10.0 151.0 149.0 108.0 86.0 64.0 30.0

3.30

Passage (g) 598.0 588.0 437.0 288.0 180.0 94.0 30.0 0.0 Remaining rate (%) 0.0 1.7 26.9 51.8 69.9 84.3 95.0 100.0 Percent Transit (%) 100.0 98.3 73.1 48.2 30.1 15.7 5.0 0.0 Through rate specification 100 95-100 80-100 50 to 85 25 to 60 10 to 30 2 to 10 -

Referring to Table 2, the assembly ratio of the second group of aggregates was found to be 3.30 as a result of sieving test. It can be seen that the sieve passing ratio of the second group aggregate (hereinafter referred to as the second sample) having an assembly ratio of 3.30 is inadequate to the passing rate specified by the Korean Industrial Standard. In FIG. 2, the passing rate of the second sample is shown in a graph.

2. Sample preparation test

In order to obtain standard aggregates having a granulation ratio of 2.3 to 3.1, the first to seventh mixed aggregates were prepared by mixing the first and second samples into seven kinds. The compounding ratios of the mixture aggregates are summarized in Table 3 below.

division Mixing ratio (weight ratio) The first sample The second sample First compounded aggregate 8 2 The second formulated aggregate 7 3 Third compounded aggregate 6 4 Fourth compounded aggregate 5 5 Fifth compounded aggregate 4 6 Sixth compounded aggregate 3 7 Seventh compounded aggregate 2 8

First, the sieve test of the first compounded aggregate is shown in Table 4 below.

division
Body number (mm)
Assembly rate 10 5 2.5 1.2 0.6 0.3 0.15 PAN Residual amount (g) 0.0 2.0 30.2 45.8 98.4 161.2 164.8 25.2

2.14

Passage (g) 527.6 525.6 495.4 449.6 351.2 190.0 25.2 0.0 Remaining rate (%) 0.0 0.4 6.1 14.8 33.4 64.0 95.2 100.0 Percent Transit (%) 100.0 99.6 93.9 85.2 66.6 36.0 4.8 0.0 Through rate specification 100 95-100 80-100 50 to 85 25 to 60 10 to 30 2 to 10 -

Referring to Table 4, the assembly ratio of the first compounded aggregate was confirmed to be 2.14 as a result of sieving test. The sieve passing rate of the first compounded aggregate was found to be inadequate for the passing rate specified by the Korean Industrial Standard. FIG. 3 is a graph showing the passing rate of the first formulated aggregate.

Next, the sieve test of the second mixed aggregate is shown in Table 5 below.

division
Body number (mm)
Assembly rate 10 5 2.5 1.2 0.6 0.3 0.15 PAN Residual amount (g) 0.0 3.0 45.3 58.7 99.6 151.8 152.2 25.8

2.30

Passage (g) 536.4 533.4 488.1 429.4 329.8 178.0 25.8 0.0 Remaining rate (%) 0.0 0.6 9.0 19.9 38.5 66.8 95.2 100.0 Percent Transit (%) 100.0 99.4 91.0 80.1 61.5 33.2 4.8 0.0 Through rate specification 100 95-100 80-100 50 to 85 25 to 60 10 to 30 2 to 10 -

Referring to Table 5, the assembly ratio of the second compounded aggregate was confirmed to be 2.30. The sieving rate of the second compounded aggregate was found to be slightly below the Korean industrial standard. FIG. 4 is a graph showing the passing rate of the second combination aggregate.

Next, the sieving test of the third combination aggregate is shown in Table 6 below.

division
Body number (mm)
Assembly rate 10 5 2.5 1.2 0.6 0.3 0.15 PAN Residual amount (g) 0.0 4.0 71.0 71.6 100.8 142.4 139.6 26.4

2.51

Passage (g) 555.8 551.8 480.8 409.2 308.4 166.0 26.4 0.0 Remaining rate (%) 0.0 0.7 13.5 26.4 44.5 70.1 95.3 100.0 Percent Transit (%) 100.0 99.3 86.5 73.6 55.5 29.9 4.7 0.0 Through rate specification 100 95-100 80-100 50 to 85 25 to 60 10 to 30 2 to 10 -

Referring to Table 6, as a result of sieving test of the third compounded aggregate, the granulation ratio was found to be 2.51. This is a value that satisfies the standard assembly ratio of 2.3 to 3.1. And the sieving rate of the third combination aggregate was also found to be in conformity with the standard. FIG. 5 is a graph showing the passing rate of the third combination aggregate.

Next, the sieve test of the fourth compounded aggregate is shown in Table 7 below.

division
Body number (mm)
Assembly rate 10 5 2.5 1.2 0.6 0.3 0.15 PAN Residual amount (g) 0.0 5.0 75.5 84.5 102.0 133.0 127.0 27.0

2.61

Passage (g) 554.0 549.0 473.5 389.0 287.0 154.0 27.0 0.0 Remaining rate (%) 0.0 0.9 14.5 29.8 48.2 72.2 95.1 100.0 Percent Transit (%) 100 99.1 85.5 70.2 51.8 27.8 4.9 0.0 Through rate specification 100 95-100 80-100 50 to 85 25 to 60 10 to 30 2 to 10 -

Referring to Table 7, the assembly ratio of the fourth mixture aggregate was 2.61 as a result of sieving test. This is a value that satisfies the standard assembly ratio of 2.3 to 3.1. And the sieve passing rate of the fourth combination aggregate was also found to be in conformity with the standard. FIG. 6 is a graph showing the permeability of the fourth combination aggregate.

Next, the sieve test of the fifth compounded aggregate is shown in Table 8 below.

division
Body number (mm)
Assembly rate 10 5 2.5 1.2 0.6 0.3 0.15 PAN Residual amount (g) 0.0 6.0 90.6 84.5 103.2 123.6 114.4 27.6

2.73

Passage (g) 549.9 543.9 453.3 368.8 265.6 142.0 27.6 0.0 Remaining rate (%) 0.0 1.1 17.6 32.9 51.7 74.2 95.0 100.0 Percent Transit (%) 100.0 98.9 82.4 67.1 48.3 25.8 5.0 0.0 Through rate specification 100 95-100 80-100 50 to 85 25 to 60 10 to 30 2 to 10 -

Referring to Table 8, as a result of sieving test of the fifth compounded aggregate, the granulation ratio was found to be 2.73. This is a value that satisfies the standard assembly ratio of 2.3 to 3.1. And the sieve passing rate of the fifth combination aggregate was also found to be in conformity with the standard. FIG. 7 is a graph showing the permeability of the fifth combination aggregate.

Next, the sieve test of the sixth mixed aggregate is shown in Table 9 below.

division
Body number (mm)
Assembly rate 10 5 2.5 1.2 0.6 0.3 0.15 PAN Residual amount (g) 0.0 7.0 105.7 110.3 104.4 114.2 101.8 28.2

2.90

Passage (g) 571.6 564.6 458.9 348.6 244.2 130.0 28.2 0.0 Remaining rate (%) 0.0 1.2 19.7 39.0 57.3 77.3 95.1 100.0 Percent Transit (%) 100.0 98.8 80.3 61.0 42.7 22.7 4.9 0.0 Through rate specification 100 95-100 80-100 50 to 85 25 to 60 10 to 30 2 to 10 -

Referring to Table 9, the assembly ratio of the sixth mixture aggregate was 2.90 as a result of sieving test. This is a value that satisfies the standard assembly ratio of 2.3 to 3.1. Also, the sieve passing rate of the sixth combination aggregate was found to be in conformity with the standard. FIG. 8 is a graph showing the passing rate of the sixth compound aggregate.

Next, the sieve test of the seventh compounded aggregate is shown in Table 10 below.

division
Body number (mm)
Assembly rate 10 5 2.5 1.2 0.6 0.3 0.15 PAN Residual amount (g) 0.0 8.0 120.8 123.2 105.6 104.8 89.2 28.8

3.03

Passage (g) 580.4 572.4 451.6 328.4 222.8 118.0 28.8 0.0 Remaining rate (%) 0.0 1.4 22.2 43.4 61.6 79.7 95.0 100.0 Percent Transit (%) 100.0 98.6 77.8 56.6 38.4 20.3 5.0 0.0 Through rate specification 100 95-100 80-100 50 to 85 25 to 60 10 to 30 2 to 10 -

Referring to Table 10, the assembly ratio of the seventh compounded aggregate was found to be 3.03 as a result of the sieving test, but the sieve passing rate was slightly lower than the Korean industrial standard. FIG. 9 is a graph showing the permeability of the seventh compounded aggregate.

3. Density and Absorption Rate Test

The test was conducted to examine the density and the water absorption rate of the first and second test samples and the first to seventh compounded aggregate. The density and the water absorption were tested according to KS F 2504 (density and water absorption test method of fine aggregate), and the results are shown in Table 11 below.

Aggregate type TEST DENSITY (g / cm ² ) Absolute density (g / cm ² ) Absorption Rate (%) Suitability The first sample 2.56 2.52 1.5 fitness The second sample 2.58 2.54 1.7 fitness First compounded aggregate 2.57 2.53 1.6 fitness The second formulated aggregate 2.57 2.53 1.6 fitness Third compounded aggregate 2.57 2.53 1.6 fitness Fourth compounded aggregate 2.57 2.53 1.6 fitness Fifth compounded aggregate 2.57 2.53 1.6 fitness Sixth compounded aggregate 2.58 2.54 1.6 fitness Seventh compounded aggregate 2.58 2.54 1.7 fitness

Referring to Table 11 above, all aggregates were found to be suitable in terms of density and water absorption.

Through the above-mentioned experiments, it was confirmed that aggregates having a granulation ratio of 2.3 to 3.1 are recovered and blended at an appropriate ratio, so that they can be used as fine aggregates suitable for the standard. Therefore, it is expected that the present invention can prevent environmental destruction and depletion of resources and smooth aggregate supply and demand.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation.

Accordingly, the true scope of protection of the present invention should be determined only by the appended claims.

Claims (6)

delete A first loading hopper for storing a first group aggregate having an assembly ratio of 1.0 to 2.2 among fine aggregates out of an assembling ratio of 2.3 to 3.1,
A second loading hopper in which a second group aggregate having an assembly ratio of 3.2 to 4.0 is stored,
A first weighing conveyor and a second weighing conveyor installed to correspond to the outlets of the first loading hopper and the second loading hopper, respectively;
A transfer conveyor installed at a lower portion of the first weighing conveyor and the second weighing conveyor for conveying the fine aggregates falling from the first weighing conveyor and the second weighing conveyor rotor;
And a mesh-type drum having a net-like shape in which a chute at an exit side of a conveying conveyor is inserted into an inlet and is rotatably installed in a frame, to obtain a compounding aggregate having an assembly ratio of 2.3 to 3.1 by blending fine aggregates conveyed through the conveying conveyor Wealth,
A third loading hopper provided with the second loading hopper and provided with a third measuring conveyor at the discharging port to adjust an erection ratio of the conveying conveyor,
A second weighing conveyor for detecting whether or not the first group aggregate is discharged from the first weighing hopper and a second weighing conveyor for detecting the discharge of the second group aggregate from the outlet side of the second weighing hopper, And a discharge unit having an impact unit for impacting the first charging hopper or the second charging hopper by a signal sensed by the detecting unit,
The detecting unit may further include an erroneous rate detecting sensor for detecting an erroneous rate of the mixed aggregate discharged by the discharging unit, and the third group aggregate discharging from the third loading hopper is controlled by the control unit of the discharge detecting unit Wherein the mixed fine aggregate is a mixture of fine aggregates. delete delete delete A first loading hopper for storing a first group aggregate having an assembly ratio of 1.0 to 2.2 among fine aggregates out of an assembling ratio of 2.3 to 3.1,
A second loading hopper in which a second group aggregate having an assembly ratio of 3.2 to 4.0 is stored,
A first weighing conveyor and a second weighing conveyor installed to correspond to the outlets of the first and second loading hoppers, respectively;
A transfer conveyor installed at a lower portion of the first weighing conveyor and the second weighing conveyor for conveying the fine aggregates falling from the first weighing conveyor and the second weighing conveyor rotor;
And a mesh-type drum having a net-like shape in which a chute at an exit side of a conveying conveyor is inserted into an inlet and is rotatably installed in a frame, to obtain a compounding aggregate having an assembly ratio of 2.3 to 3.1 by blending fine aggregates conveyed through the conveying conveyor And,
The chute further includes a first mixing unit for mixing the first and second aggregate materials,
The first primary mixing unit includes a partition plate installed at the inlet side of the chute, a first induction vane guiding aggregate discharged through a passage on one side partitioned by the partition plate toward the center side, A second induction vat provided on the side of the other passage on the lower side of the first induction vat for causing agglomerates passing through the other passage to collide with aggregate discharged by the first induction vat, Shaped guiding member for guiding the aggregate guided by the second guiding member in the circumferential direction, the guiding member having a plurality of unit members radially extending from the center of the guiding member, And the inclined yarns are formed in the same direction.

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