ACI Concrete Field Testing Technician - Grade I

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A laboratory is testing a coarse aggregate sample for specific gravity and absorption according to ASTM C127. The aggregate is soaked for a prescribed period and then dried to a saturated-surface-dry (SSD) condition. What does the SSD condition signify?

The aggregate has been oven-dried to a constant mass. The aggregate's permeable pores are filled with water, but the surfaces of the particles are dry. The aggregate is completely submerged in water. The aggregate contains no moisture in its pores or on its surface.

Correct Answer:

The aggregate's permeable pores are filled with water, but the surfaces of the particles are dry.

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