Specification
Raw material feed

DA

40㎜～0Max. withdraw
10t/h

Dust collector

Standard system

FillerE

Blast material
Rawmaterial

Pre duster

B

Dustcollector

High Quality Restarted Concrete Dry system

Pre duster

Low noise・No dust emission・Dry system
Blaster
Product screen

13～5mm
20mm以上20～13mm
砂BlasterFiller+20㎜

20～13㎜

13～5㎜

Sand

Flow sheet（㎜）

Raw material feed

C40mm～0Model

Resco − 10A

7,000

B

8,000

C

8,500

D

15,000E

10,000G.L

Capacity
Model

Resco − 10Capacity（feed-40mm）
Blaster

5 〜 10t ╱ hDust collector air volume

250㎥╱ min

RC8−10※ Capacity varies by characteristic of waste concrete and requirement to end product.

Processing test available

Test plant

Required raw material ３ton
Contact us with below information.
Raw material⒜ Type⒝ Moisture %End product⒜ Type⒝ Target quality ⒞ Sample volume

Kotobuki Eng.&Mfg. Co., Ltd.

1-2-2, Hiro Shiratake, Kure-city, Hiroshima 737-0144, JAPAN, TEL: +81-823-73-1136

https://www.kemco.co.jp/IMPORTANT The contents herein may be modified at any time without prior notice⒞ Max. size⒟ Grading

Strong shot blaster “RC8” produces highly graded aggregate
without a heating process of waste concrete.

Creating futureNEXT BOX IS KEMCO

Blast image

The dry system producing high quality
aggregate from waste concrete

Rotating casing

Blaster RC8

Rotating casing⑤⑤

Rotating screen①Coarse material

Rotating screen

Blast rotor

Blast rotor②Blast material

Back ground of development③●Mandatory of segregation at demolition workand recycling of building waste in Japan.

Filler③

Coarse material

Coarse material●Large volume of waste concrete is generated
from building constructed in1960's in Japan,
so called high growth period.

④④〈Front section image〉
Rotation of rotating casing enables top surface of coarse material layer to keep
refreshing and blast material efficiently and evenly polish surface of each particles.
Quality is controlled with blasting time.

●Recycled aggregate for concrete is specified
in JIS.
Recycling mechanism① Coarse material（above sand size） feeding② Blast material（below sand size）feeding③ Tear off the mortar and cementitious material by blasting④ Screen to classify sand particles⑤ To refill sand particles as blast material※Ultra fine powder generated while blasting is collected by dust collector

Blast image●Sand size material from waste concrete isblasted onto coarse material by the blast rotor
to tear off mortar and cementitious material.
The system reproduce coarse and fineaggregate as same quality as virgin aggregate.

Photo of material and productProduct 20–13㎜

Raw material

Product 13–5㎜

FillerIndustry first features●Both coarse and fine aggregate achieve H grade⇒Adjustment of blasting time controls end productquality, Low to High.
●Minimized damage to Coarse aggregate⇒Applying sand blasting system, coarse particles toavoid damage by unnecessary crushing.
●Beautiful particle surface⇒Blast polishing beautifully cleans particle surface.
●Quality control⇒The system manages blasting time, power
consumption and batching information etc.

Low initial cost

Raw material 0.6–0.3㎜

Quality・Applying dry system waste water treatment
is no longer required.
・Blast, Classification, Dust removal by 1 unit

Grade segment of recycled aggregate in JIS

No dust emission, Low noise, Aggregate recycling

Environment

14Moisture（％）
absorption

Low cost

Product 0.6–0.3㎜

Environment friendly

・Small footprint with compacted design〈Filler application〉
・Road bed・Filling material
・Moisture control of sludge

12Raw material

L grade30 sec blast

10

Absolute dry densityℊ /㎠8
M grade60 sec blast

6490 sec blast H grade

20GradeWater absorption％

Weight loss
Ultra fine content％

2.1

2.2

2.3

2.4

2.5

2.6

Absolute dry density（ｇ/㎤）

Fine aggregate quality（sample）

2.7

Solid volume％

Coarseaggregate

L–H

Coarseaggregate

2.3 or above

2.2 or above

2.5 or above

2.5 or above

7.0％ or below 13.0％ or below 5.0％ or below

7.0％ or below

3.0％ or below

3.5％ or below–

35％ or below–

8.0％ or below

1.0％ or below

7.0％ or below–

CoarseaggregateM

Fine
aggregate–

Fine
aggregate––

3.0％ or below 10.0％ or below 2.0％ or below

––

Fine
aggregate

55％ or above 53％ or above 55％ or above 53％ or above