INDICATOR for MT 146.2 Resin anchor bolt – steel bars and accessories China Supplier for sell

Indicator for Coal industrial standard of PRC MT146.2 Resin anchor bolt part 2: steel bars and accessories.

timg (2)_副本_副本Many people don’t know what is MT. “MT” is the acronym of “Mei Tan” in Chinese language, which means “Coal”.

3 types of resin rock bolts:

headed twist bar

 

 

 

 

 

 

 

 

 

 

headed twist bar

ribbed bars with non-longitudinal ribs

 

 

 

 

 

 

 

 

 

 

 

ribbed bars with non-longitudinal ribs

fully ribbed bars

 

 

 

 

 

 

 

 

 

 

 

fully ribbed bars

Technical requirements:                                                                                                                                                      

1. Appearance

without serious corrosion, no oil or  greasy dirt at anchoring portion.

2. Mechanical Properties

Yield strength of Rebar rock bolt should be at lest more than 335MPa, and left-hand non-longitudinal rebar will be a better choice. Right-hand or continuously ribbed rebars are also acceptable.

If choose round rebar, its dimensions, yield strength, tensile strength should follow GB1499.1;left-hand non-longitudinal rebar, right-hand continuously ribbed rebar should follow GB1499.2.

Elongation after fragile should be at lest 15%.

3. Tolerance

Straightness ≤2mm/m

length L ±10mm

Threaded part length L2 ±5mm

4.Nut

Nut should be in accordiance with GB/T 6170, GB/T 3098.2

5.Washer

Size of washer should be at least 100mmX100mm, or φ100mm

6. Anchoring Strength

Anchoring strength should be more than 1.2 times of bar’s standard yield strength.

 

Contact:  [email protected]

 

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Post time: Mar-15-2019