When testing a product to meet ASTM C928 (the Standard Specification for Packaged, Dry, Rapid-Hardening Cementitious Materials for Concrete Repairs), a few requirements must be met.  One requirement is length change.  This is measured using ASTM C157 Standard Test Method for Length Change of Hardened Hydraulic-Cement Mortar and Concrete.  This picture shows US SPEC Transpatch being tested.


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