SANTA ROSA, GUAM

The sample is construction sand. "[It] is very pure and heavily gradated because it is manufactured (mechanically crushed from large rocks) on Guam. There are no sand deposits here suitable for construction. Beach sand is not quality sand for structural concrete for many reasons. The granules are too rounded, and there is salt intrusion with resulting corrosive action. The best sand granules for concrete are of an irregular, angular shape, and taken far from an ocean beach.

[O]n Guam there are no locally made bricks. Bricks were probably never used as a construction material here. There must not be any clay deposits suitable for firing bricks. All rugged or sturdy homes are made from inferior concrete bock. Due to the use of beach sand as a cheap and unsatisfactory filler-aggregate, they crumble a lot and are vulnerable to earthquakes. There are no brick remnants in the streams or along the beach that is something one finds in other parts of the world." Gary Foster

GRAIN DISTRIBUTION CHARACTERISTICS (AGI CHART)

GRAIN SHAPE CHARACTERISTICS

(PREPARED BY GAMMA ZETA CHAPTER , SIGMA GAMMA EPSILON, KENT STATE UNIVERSITY - AGI CHART))

Roundness is the degree of smoothing due to abrasion of sedimentary particles. It is expressed as the ratio of the average radius of curvature of the edges or corners to the radius of curvature of the maximum inscribed sphere.

The sphericity of a particle is: the ratio of the surface area of a sphere (with the same volume as the given particle) to the surface area of the particle.

0X IMAGE (BACKGROUND IMAGE)

1X IMAGE

3X IMAGE

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