Concrete Site Mix Evaluation

  • Overview
  • Benefits of Certification
  • Why Work With NSF?
  • Certification Process
Drinking water contaminants can come from many sources, including the equipment used for water storage and transportation. Concrete used in large storage tanks, reservoirs and pipelines is usually a combination of cement, admixtures, curing compound, sand and gravel. It can also contain fly ash and other additives to strengthen the concrete and increase its durability. However, any of these additives can have contaminants that can cause compliance problems for the utility and present potential health risks to the consumer.

Benefits of Certification

To help minimize the risk of contaminants, NSF certifies individual concrete ingredients to the requirements of NSF/ANSI Standard 61: Drinking Water System Components – Health Effects. Our Concrete Site Mix Design Evaluation Program provides a one-time evaluation that certifies concrete consisting of non-certified cement or other ingredients against this same standard.

NSF/ANSI 61 testing covers all products with drinking water contact from source to tap, and determines what contaminants may migrate or leach from your product into drinking water. It also confirms if they are below the maximum levels allowed to be considered safe.

Why Work With NSF?

NSF is well respected by public health officials and drinking water utilities. Our responsive, personalized service quickly guides your products through the testing process, ensuring that they get to market on time and on budget. We try to combine services wherever possible to help keep costs down, and provide pricing up front so there are no hidden surprises down the road.

Certification Process

We require information on each ingredient in the site mix and details of its end use structure. Since we have worked with the cement admixture industry for over 20 years, we are able to obtain any additional information on ingredient composition relatively quickly. We perform testing on concrete cylinders manufactured from the mix, including analysis for the potential release of regulated metals, radionuclides, volatile organics and other contaminants that may leach directly into drinking water. Results are typically available in 30 days or less.

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