U-kit PRODUCTS

NRC
(Instantaneous/Sequential, Non-Explosive Rock-Cracking System)

NETIS Registered　　　CB-110029-A

NRC is the non-explosive which is invented to efficiently break the rocks at the sensitive area for the surrounding environment. By the water-vaporized pressure from the thermit reaction, NRC breaks not only the rocks but the concrete-structures.

FEATURES

Sequential Blasting

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By the electronically-controlled Time-Connectors for the sequential blasting, the construction work of a tunnel or a caisson type pole is efficiently done.

Non-Explosives

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Since NRC is exepted from the Explosive Control Low (in Japan), the procedure of its storage or usage is simpler and easier than those of the general explosives.

※The explosive control law may vary in countries.
Please ask us or the appropriate authority in your country.

Low-Vibration, Low-Noise

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The water vaporized pressure, due to the thermit reaction of the non-explosive ingredients, achieves the Low-vibration, Low-Noise blasting at a worksite.

Similar Operational Procedure to
General Blasting.

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How to use NRC is similar to How to use the general blasting.

Connectable-cartridge

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Connecting the cartridges makes your work more efficiently and cost-friendly.

OPERATING PROCEDURE (Sequential Blasting)

Standard usage and blasting plan of the NRC.

Standard Usage〔kg/m3〕

Type of Work ＼ hardness of rocks Soft Medium Hard
Center cut 1.8 2.0 2.5
Cutting down of bed 0.7 0.8 1.0
Bench Cut 0.6 0.7 0.9

※ Depending upon the condition of the rocks and blasting at the actual
work site, the numbers in the above list may vary.

NRC can be used only by the workers who receive the designated education of its usage.
Evan though the NRC is not categorized in explosives, there is a deflagration.
Therefore, the contents of the NRC standard operational Manual must be obeyed at all the time.

SPECIFICATIONS

Ingredients

Bulk Density Speed of Blasting
(m/s)		 Amount of Gas
(ℓ/kg)		 Waterproof After gas
1.25～1.35 100～300 350 No Poor

Time connectors

Bulk
Density		 Material Standard
Resistance		 Diameter
(mm)		 Length
(mm)		 Delay-
Control		 Water
resistance
(MPa)
Instantaneous
 3.5 Aluminum 1.37Ω 8.1 61 - 0.3
Sequential 20kΩ 112 Electrical

Cartridge

  Diameter
(mm)		 Length
(mm)		 Amount of
Ingredients
(g/Cartridge)		 Pieces
(per box)		 NET weight
(kg/box)		 Box Size
(mm)
ＮＲＣ 200 34 200 200 80 16 450×305×190
ＮＲＣ 400 34 400 400 40 16 450×305×190
ＮＲＣ 1000 50 420 1000 14 14 460×275×170

Sequential Numbers and each delay timing of Time Connectors

Sequential
Number		 Delay Timing
(ms)
#1 25
#2 50
#3 75
#4 100
#5 125
#6 150
#7 175
#8 200
#9 225
#10 250
#11 275
#12 300
#13 325
#14 350
#15 375
Sequential
Number		 Delay Timing
(ms)
#16 400
#17 425
#18 450
#19 475
#20 500
#21 525
#22 550
#23 575
#24 600
#25 625
#26 650
#27 675
#28 700
#29 725
#30 750
Sequential
Number		 Delay Timing
(ms)
#31 775
#32 800
#33 825
#34 850
#35 875
#36 900
#37 925
#38 950
#39 975
#40 1000

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