A.S.T.M. C-90 specifies the following tests for load-bearing concrete masonry units (for both TRENDSTONE® and TRENDSTONE PLUS® units)
Compressive Strength and Moisture Absorbancy	A test to ensure that blocks meet strength and moisture requirements, and are free of cracks and other defects.	Complies
A.S.T.M. C-744 specifies the following tests for TRENDSTONE® ground face concrete masonry units
Cracking and Crazing	A test to ensure that the units are free from cracking and/or crazing.	Complies
Adhesion	A test to determine the adhesion of the finished facing to the block substrate.	Complies
Abrasion	A test to measure the abrasion resistance of the finished facing.	Complies
Color Change	A test by accelerated weathering apparatus to measure change.	Complies
A.S.T.M. C-744 Specifies the following tests for TRENDSTONE PLUS® ground face concrete masonry units
Cracking and Crazing	A test to ensure that the units are free from cracking and/or crazing.	Complies
Resistance to Staining and Chemicals	Testing of various chemical, i.e. detergents, solvents, and Chemicals etc., in concentrations set by ASTM standards and A.S.T.M. requirements.	Complies
Adhesion	A test to determine the adhesion of the finished facing to the block substrate.	Complies
Abrasion	A test to measure the abrasion resistance of the finished facing.	Complies
Flame Spread Index†	A test to determine how much the finished facing will allow flame to spread in a fire.	Complies
Smoke Development††	A test to determine the amount of smoke given off by the finished facing in a fire.	Complies
Color Change	A test by accelerated weathering apparatus to measure color fading or change.	Complies
Soiling and Cleansability	A test to determine how easily the finished surface can be cleaned.	Complies
Efflorescence	A test to ensure that soluble salts do not migrate to the surface when moisture is present.	Complies
Dimensional Tolerances	A test to ensure that variations in the sizes of the blocks in all dimensions are less than 1/16".	Complies
Face Variation	A test to ensure that the finished facing dimensions do not vary more than 1/16".	Complies
Depth Variation	A test by measurements to ensure that the thickness of the prefaced block are within 1/16" of the specified size.	Complies
Distortion of Facing	A test by measurements to ensure that the finished facing is straight, true, and in plane within 1/16".	Complies
Surface	A laboratory inspection for quality of the facing (no imperfections).	Complies
Other Tests: (for both TRENDSTONE® and TRENDSTONE PLUS® units)
Freeze/Thaw Test	A test to ensure that the finished facing does not crack or craze when exposed repeatedly to freeze thaw cycles	Complies
†The test method specified in ASTM E-84 is used to determine surface burning characteristics. ††In this test, red oak is given a value of 100 and asbestos cement board is given a value of 0 to calibrate the test equipment.