SEDL / STP / STP1176-EB / STP25545S

The Influence of Various Polymeric Materials on the Physical Properties of a Cementitious Patching Compound

Bright, RP
Senior Principal Research Chemist, Senior Research Technician, and Group Leader, Cement Adhesives and Additives Group, Air Products and Chemicals, Inc., Air Products and Chemicals, Inc., Allentown, PA

Mraz, TJ
Senior Principal Research Chemist, Senior Research Technician, and Group Leader, Cement Adhesives and Additives Group, Air Products and Chemicals, Inc., Air Products and Chemicals, Inc., Allentown, PA

Vassallo, JC
Senior Principal Research Chemist, Senior Research Technician, and Group Leader, Cement Adhesives and Additives Group, Air Products and Chemicals, Inc., Air Products and Chemicals, Inc., Allentown, PA

Pages: 19    Published: Jan 1993

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Abstract

A series of polymer modified cementitious patches were formulated using a variety of liquid latex and redispersible powder modifiers. Properties evaluated included compressive, flexural and tensile strength, water resistance, abrasion resistance and adhesive strength. Formulations were evaluated at 5%, 10% and 20% polymer loading with the water level adjusted for a constant flow. A second series of experiments were carried out at 10% polymer loading at a constant water level.

The results of the study showed that there was a strong relationship between the water/cement ratio and the overall properties of the formulation. In the experiments with water/cement ratio adjusted to achieve a constant flow, the liquid emulsion that possessed a high degree of water reducing capability achieved the highest strength and water resistance. However, in the experiments with a constant water level, the redispersible powdered emulsions now had at least equivalent properties to the liquid polymers.

These results showed that it is possible to formulate a high performance one component patching and repair mortar using redispersible powder emulsions.