Case Study

Procedure & Observations:
The purpose of this field demonstration was to assess the performance of the Pavemend TR™ as an overlay material as well as validate our ability to mix the material in a grout mixer as a dispensing methodology for large scale applications.

The application site was an inclined surface (1:12) utilized as a loading dock ramp consisting of a concrete slab of undetermined age/strength. The area consisted of a 12’ x 11.5’ surface area. The depth of application varied to accommodate proper drainage and to exhibit the properties of the product. The maximum depth was 1” at the Southwest corner of the ramp adjacent to the building/loading dock. A 0.5” overlay was placed on the remaining concrete surface. The area was prepared by power washing the surface with a 3000 PSI machine to remove all loose and deleterious materials. Some previously placed Pavemend applications remained fixed to the surface and were subsequently overlaid.

Prepared Test Surface:
A 6ft³ capacity grout type mixer with stationary drum and rotating paddles was utilized. Batches consisted of 3ft³ of product with appropriate water quantities. All materials were mixed to standard practice to a critical temperature of 90°F.

Once mix temperature was achieved the material was placed on the test surface and brought to grade utilizing squeegees. Final grade was reached by hand troweling the material to a consistent finish before a broom texture was applied.

Observations:
The material mixed to an even consistency within the first minute of mixing. A creamy texture was achieved and maintained after the initial wetting of the material. With this equipment the final mix times were reached in an acceptable amount of time while seeming to provide ample chemical reaction.

At discharge, the material maintained its even consistency similar to that of the traditional Pavemend SL™ (retained self-leveling properties). As the material became static a thickening to a gel state became evident. The material was then able to be manipulated with traditional concrete placement techniques (trowels, fl oats, screeds, etc.). A broom finish was then applied with the material exhibiting the ability to retain the texture more readily than that of traditional Pavemend products with the exception of Pavemend VR™.