ASTM C887-20 PDF Download

ASTM C887-20 is a standard specification that outlines the materials, properties, and packaging requirements for packaged, dry, combined materials used as surface bonding mortar with concrete masonry units. The standard specifies that the concrete masonry units should not be prefaced, coated, or painted.

The ingredients of the surface bonding mortar include cements (Portland cement, blended hydraulic cement, hydraulic cement, or masonry cement), hydrated lime, pozzolan (Class N, F, or S), aggregates, glass fibers, and additives. The physical properties of these packaged materials should meet the specified requirements for flexural strength, compressive strength, time of setting, and water retention.

The standard also emphasizes the calculation and reporting of the net weight, amount of mixing water, unit weight, and yield of the surface bonding mortar. It should be noted that this specification does not cover the design or application aspects, and the manufacturer's recommendations should be consulted for specific instructions.

Appendix X1 of the specification provides recommended tests for evaluating surface bonded masonry assemblages to establish design loads for composite walls. Additionally, Appendices X2 through X5 describe additional tests that can be performed on surface bonding mortar.