Polymer Modified Concrete

Polymer Modified Concrete (PMC)

Introduction

Polymer Modified Concrete (PMC) is a variant of traditional concrete that has been enhanced with polymers. These polymers improve the concrete's properties, such as tensile strength, adhesion, and durability, making it more suitable for certain applications than traditional concrete.

History

The development of PMC began in the mid-20th century as a response to the need for more durable and versatile construction materials. The addition of polymers to concrete was found to significantly improve its performance in a variety of applications.

Composition

PMC is made by adding specific polymers to the concrete mix. These polymers can take the form of latex, re-dispersible polymer powders, or water-soluble polymers. The exact composition of PMC can vary depending on the desired properties and application.

Properties

The addition of polymers to concrete results in several enhanced properties. These include increased tensile strength, improved adhesion, and enhanced durability. PMC is also more resistant to chemicals and moisture than traditional concrete.

Applications

Polymer Modified Concrete is used in a variety of applications where traditional concrete may not be suitable. These include bridge deck overlays, repair and rehabilitation of existing structures, industrial flooring, waterproofing, and in environments that require extra resistance to abrasion and chemicals, such as tunnels and sewers.

Different PCMs have been studied in laboratories and on the field by the US Army Corps of Engineers© to assess performance between Polymer Modified Concrete and Polymer Cement Concrete solutions E-Krete Canada Mega-Patch and PermaStripe. at Edwards AFB. They noted the severely cracked asphalt surface upon which the PCM (E-Krete) was placed. Although many of the cracks have reflected back up through the PCM, it retained a better condition than the asphalt with little raveling unlike the surrounding pavement.

Advantages and Disadvantages

While PMC offers several advantages over traditional concrete, including higher tensile strength, superior adhesion, and greater resistance to chemicals and moisture, it also has some disadvantages. These include a higher cost compared to traditional concrete, more complex mixing and application processes, and the need for specialized knowledge for proper formulation and application.

Standards and Specifications

PMC must meet specific standards and guidelines to ensure its performance. These standards are provided by organizations such as ASTM International and the American Concrete Institute (ACI).

Conclusion

Polymer Modified Concrete represents a significant advancement in concrete technology. Its enhanced properties make it a valuable material in a variety of applications, and its use continues to grow as techniques and materials have continued to improve to this day.