The phrase "a clay sample" is correct and usable in written English.
You can use it when referring to a specific portion or specimen of clay, often in contexts related to geology, art, or material science.
Example: "The geologist collected a clay sample from the riverbank to analyze its composition."
Alternatives: "a sample of clay" or "a specimen of clay."
Cohesion is the ability of a clay sample to withstand a finite shear stress within its mass without confinement.
The literature shows some attempts to improve the test method, all based on the force needed to indent a clay sample surface with specific water content.
A large apparatus, 350 mm in diameter and 280 mm in height, was developed, which is capable of controlling extremely low suctions (< 0.01 kPa) at an accuracy of 0.005 kPa and accommodating a clay sample with fully developed crack networks.
In so doing, cement and CSF blend with 10% cement replacement were separately added to a clay sample having high degree of swelling potential, and then, a set of macro and micro level tests were performed under various curing regimes to assess the responses of amendments.
The swelling rate (εs) which is defined as the percentage of swelling of a clay sample compacted at optimum Proctor and subjected to a load of 7 kPa was computed using the following equation (2) (Derriche and Kebaili 1998): {upvarepsilon}_s={1.10}^{-5}times ={1.10}^{-5}timesI}}^{2.24} (2).
A real hydromechanical experiment which consists in a hollow cylinder test on a Boom Clay sample is modeled in two phases.
The kerogen isolated from a representative clay sample, collected in the underground laboratory of the Nuclear Energy Research Centre at Mol (Belgium), was subjected to short heating at 300 °C to examine the thermolabile fraction released.
As the answer to the above question lies in knowing the age of the youngest Kalimati Formation, we collected a carbonaceous clay sample of this formation from 1 km to the south of southern edge of the Tribhuvan International Airport of Kathmandu (Fig. 2a) at an altitude of 1296 m, and lying near the bank of the Manohara river in the central part of the basin to perform AMS14C dating.
A natural jarosite clay sample, rather than a pure synthetic standard, was used for this work for two reasons.
A large peak of carbon dioxide and a minor peak likely representing carbon monoxide were detected during pyrolysis of a natural jarosite clay sample, suggesting that the organic content is being combusted by oxygen released by jarosite decomposition.
Iron-intercalated clay has been obtained starting from a natural bentonite-type clay sample from Maghnia Algeriaa).
