Influence of Polymer Modification on Durability of Porous Concrete
A. Beeldens, D. Van Gemert, C. Caestecker,
M. Van Messem, and E. De Winne
Appears on pages(s):
deicing; freeze-thaw durability; polymerization; porosity; thermal gradient; wetting and drying tests
Porous concrete is used as top layer on highway roads and is characterized by a very open structure due to the use of gap-graded aggregates. This provides good drainage capabilities and noise reducing properties. In a preliminary test program, the durability of concrete, a polymer emulsion was added to the concrete mixture. Three different types of polymer emulsions were used. The resistance against freezing and thawing cycles, deicing salts, temperature variation and wetting and drying cycles were investigated on samples with a polymer-cement ratio of .10. Minimum film forming temp4erature, strength and elasticity of the polymer emulsion and of the hardened polymer film were determine as well. This paper deals with the results of the durability tests and investigates the relation between the properties of the polymer emulsion and the behavior of the polymer modified porous concrete. The role of the polymer film concerning structure formation as well as durability behavior in the hardened concrete is discussed.