The CBR field test set is designed for making CBR determinations in the field and is built around a modified H-4156 load frame. CBR field testing can quickly yield a relative strength determination without having to rely on lab tests. Field tests involve forcing a piston into the soil and comparing the depth of penetration in relation to the load placed on the piston. 通常, the reaction load used for field testing is a heavy piece of equipment, such as a loaded dump truck. Gear box is 2-speed model with a 10,000lbf (45kN) capacity and 3.5英寸升力. The use of the extension and connector set provides sufficient flexibility for almost any type of height requirement. The CBR field test set includes:
H-4156J:(1) 2-sp. 齿轮箱，手柄 & 滚筒
h - 4156: (1) Swivel base
H-4454.020: (1) 2200 lbf load ring
H-4454.050: (1) 5500 lbf load ring
H-4152F.1: (1) CBR扩展集
H-4152F.2: (1) CBR connector set
H-4158.1: (1) Dial indicator, 1.000" x 0.001"
H-4152F.8: (1) Steel bridge support, 8 ft.
H-4179F.10: (1) Surcharge weight, 10lb, 10"
H-4179: (2) Slotted surcharge weight, 10lb
H-4179F.20: (2) Slotted Surcharge weight, 20lb, 8.5"
H-4470: (1) Magnetic indicator mount
H-4178F.4: (1) 渗透 piston, 4"
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