The correct sampling, description and preparation of soil and soil mixtures is necessary if subsequent tests are to be meaningful and provide representative results. Various national and international standards specify a range of procedures and equipment necessary to ensure representative sampling.

A regular laboratory requirement is the mixing of samples with water and/or other constituents to provide a homogeneous mixture prior to subsequent testing. The following range of mixers provide an efficient means of mixing samples.

Model No. Voltage Desc
23-6191/10 - Stainless Steel Bowl
45-5580/01 220 - 240 V AC, 50/60 Hz, 1 ph Isomantle Electric Heater
23-6191/01 220 - 240 V AC, 50 Hz, 1ph Bench-Mounting Mixer

The removal of soil cores from sampling tubes must be accomplished with the minimum of disturbance, particularly when small specimens have to be prepared in order to carry out laboratory tests. Large extrusion forces used indiscriminately will compress soil resulting in false values of shear strength and consolidation.

The items listed provide the engineer with an economic range of equipment for field survey work. Using this equipment it is possible to obtain disturbed or undisturbed samples at reasonable depths, subject to ground conditions. Most items may be inter-connected.

These auger heads are suitable for boring in cohesive soils or sands and gravels. The soil augers are constructed of heavy duty steel plates forming an open tube partly interlocked at the cutting end. Gravel augers comprise a one piece steel casting with a spiral point and two plates designed to close when lifting samples from the borehole. The Dutch Auger is of similar construction to the Soil Augers and is particularly useful in very fine silt-clay sands.

Thiis range of durable augers is based on a threaded joint system enabling items to be interchanged and extended to any depth required.

Model No. Dia. mm Cohesive Gravel/Sand Silty Sand Weight, kg
23-1501 100 Yes - - 1.5
23-1504 150 Yes - - 2.5
23-1525 50 - - Yes 1.5
23-1517 150 - Yes - 1.2
23-1617 40 - - Yes 1.5

Designed for the rapid preparation of samples, the ELE range of riffle boxes are constructed of heavy gauge sheet metal, with particular attention given to reinforcement of the partitions to maintain the accuracy of the slot dimensions. The units offered are supplied in a range of sizes from 7 mm to 64 mm slots.

Model No. No. slots Max part. size mm BS Max part. size EN Slot width, mm
23-3050 12 8.5 6.5 13
23-3070 12 10.0 7.5 15
23-3100 10 12.5 9.5 19
23-3150 10 16.5 12.5 25
23-3170 10 20.0 15.0 30
23-3200 8 25.0 19.0 38.0
23-3300 8 33.0 25.0 50
23-3350 8 42.5 32 64
23-3000 12 4.5 3.5 7

The reduction of particles within the soil mass is necessary for a number of tests. For most purposes crushing of individual particles must be avoided. This reduction process is best achieved using a porcelain mortar and rubber headed pestle.

Model No. Desc
23-3505 Mortar and Pestle
23-3500 Rubber Headed Pestle