Soil Heavy-Duty Pocket Penetrometer
The pocket penetrometer is a world-wide known instrument.
It is used by geotechnicians, geologists, agronomists, etc. to obtain quickly and easily an approximate measure of the shear resistance at failure of cohesive and semicohesive soils.
The body of the 16-T0163 pocket penetrometer consists of two telescopic cylinders containing a compression spring. A cylindrical tip, screwed at the lower part of the body, is pushed into the soil compressing the spring.
The 16-T0163 penetrometer is suitable for severe environmetal conditions. The complete instrument, including the spring, is made of stainless steel.
The 16-T0163 has been designed to allow relatively deep penetration of the soil for a pocket penetrometer (up to 6 cm max); this reduces mistakes and uncertainties typical of shallow measures which are often affected by remoulding, drying, etc. of the surface.
A value of the unconfined compressive strength (UCS) can be directly read from the scale on the instrument. This value (see appendix) has been derived from the so called "point resistance" which is the force needed to penetrate into the soil.
Measured strength values can assist the classification and description of cohesive soils and also give useful preliminary information about the shear strength.
The 16-T0163 can be used both in the field and in the laboratory with soils having UCS values (unconfined compressive strength) between zero and 2 MPa. For soft to medium soils the use of the largest tip is recommended to obtain a good resolution.
Specifications
The sensing part of the pocket 16-T0163 is a compression spring having a nominal stiffness of about 7 N/mm. 19 N of penetration force correspond to 2.72 mm of compression.
The standard tip of the penetrometer has a diameter of 6.35 mm. This gives a cross section equal to 31.65 sqmm. The largest tip has a diameter of 8.98 mm that it means a cross section of 63.335 sqmm.
The effective lengths of the standard probes is the same as the diameters which corresponds to the position of stop line for other pocket penetrometers in use.
With this point resistance values of up to 1 Mpa can be measured.
The instrument is supplied with another two interchange points, of which:
- the largest, diameter 8.98 mm, has a section twice that of the standard points and this measures resistance values of up to 0.5 Mpa; with this point, the values read on the scale must be divided by 2.
- the smallest, diameter 4.55 mm, has a section half that of the standard point and this measures resistance values of up to 2 Mpa; with this point, the values read on the scale must be multiplied by 2.
ABOUT TIANPENG
Zhuozhou Tianpeng (generally refers to Zhuozhou Tianpeng Imp. and Exp. Trade Co., Ltd & Zhuozhou Tianpeng Instrument Manufacturing Co., Ltd.) was founded in 2006, and specialize in the design, manufacture and supply of high-quality construction materials testing machine for concrete, soil, cement, asphalt and etc. We have more than 300 customers worldwide, including many of the major companies around the world. More than 10 years of industry experience, professional technical and service teams help us better meet customer needs, making us an ideal partner.
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