Description

Concrete rebound hammer is applied to test the compressive strength of hardend concrete in building structure. standard:jgj/t23-2011; gb /t9138-1988; jjg817-93; astm c 805; bs 1881:202; nf p18-417; din 1048; uni 9189 product name zc3-a concrete test hammer standard impact energy 2.207j testing range 10~60mpa stroke of rebound hammer 75±0.3mm average rebound value 80±2 the static friction of pointer slider 0.65n±0.15n sphere radius of rebound pole sr 25±1mm working humidity ≤90%rh working temperature -10°c~+50°c size 195x140x45mm weight 2.1kg