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Table 10 Initial Assessment of Suitability for Case Study 2

Product Testing

Whether Test Product Data Within Range of Competitive Data

Comments

Viscosity

NA

Not tested

Abrasion Resistance

The testing was successfully “passed” based on the ASTM standard Results met ASTM requirements for certain applications

Yes

Skid Resistance

Yes

Adhesion

NA NA

Additional testing may be needed Additional testing may be needed

Solids

Tensile Strength / Elongation Fire Resistance

NA

Additional competitive testing may be needed

Results met ASTM requirements for certain applications No defects caused by extended weathering cycles

Yes

UV Weathering Resistance

Yes

Water Vapor Transmission Rate Thermal Resistance

NA

Criteria need to be established

NA NA

Criteria need to be established Criteria need to be established

Air Permeance

Flexibility (Cracking resistance)

Results met ASTM requirements for certain applications; however additional competitive testing may be needed

Yes

Table 11 presents a summary of cause and effect relationships among various crumb rubber attributes. Each row lists an attribute with a “direction of change” (the cause) and the resulting effect on material properties. Take particle size as an example. As particle size is reduced, viscosity will increase. At the same time skid resistance will be reduced. Adhesion and solids are not affected by particle size. A wavy line (~) indicates that the resulting effect will be variable. A dash (-) indicates that the resulting effect is unknown. These assessments are relative, and are based on material experience and the literature, not on actual test results from this initiative.

Contractor’s Report

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