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Question 1 of 30
During a routine geotechnical investigation, a technician is tasked with determining the natural water content of a clayey soil sample collected from a construction site. The laboratory protocol strictly adheres to ISO 17892-1:2014. The technician uses a drying oven set to \\(105\\) °C for \\(12\\) hours. Upon weighing the sample after this period, a subsequent weighing after an additional \\(2\\) hours at the same temperature shows a negligible mass difference. Considering the standard requirements for accurate water content determination, what is the primary implication of using a drying temperature of \\(105\\) °C instead of the specified \\(110 \\pm 5\\) °C, even though the sample appears to have reached a constant mass?
The lower drying temperature may not have completely removed all hygroscopic and adsorbed water, potentially leading to a slight overestimation of the water content.
The lower drying temperature would have caused a loss of bound water from the clay minerals, resulting in an underestimation of the water content.
The extended drying time required to reach a constant mass at a lower temperature indicates a higher initial water content than what would be determined at the specified temperature.
The use of a temperature below the specified range is acceptable as long as the sample reaches a constant mass, as it prevents any potential thermal decomposition of organic constituents.

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