Concrete admixtures are used to improve the behavior of concrete under various conditions. Chemical admixtures reduce the cost of construction, modify properties of hardened concrete, ensure quality of concrete during mixing, transporting, placing, and/or curing, and overcome certain emergencies during concrete operations.
Concrete curing compounds consist of waxes, natural and synthetic resins, and water or a solvent carrier. Membrane-forming curing compounds are used to retard or reduce evaporation of moisture from fresh concrete. They are either clear/translucent or white pigmented.
The work plans can be found by clicking on the Documents tab above.
NTPEP Designated Labs:
- American Engineering Testing, Inc.
- SGS TEC Services
- Minnesota Department of Transportation
NTPEP - Concrete Admixtures & Concrete Curing Compounds
Annual meeting minutes are combined with attendance sheets and, if available, presentations.
2020 Annual Meeting Virtual
2019 Fall Conference Call
2019 Annual Meeting Big Sky, MT
2019 Winter Conference Call
2018 Annual Meeting Norfolk, VA
2017 Fall Conference Call Minutes
2017 Summer Conference Call Minutes
2017 Spring Conference Call
2017 Annual Meeting Boston, MA
2017 Winter Conference Call Minutes
2016 Fall Conference Call Minutes
2016 Summer Conference Call Minutes
2016 Annual Meeting Grand Rapids, MI
2015 Fall Conference Call Minutes
2015 Annual Meeting Scottsdale, AZ
2014 Summer Conference Call
2014 Annual Meeting Greenville, SC
NTPEP tests products according to a Project Work Plan, which describes the laboratory and/or field test protocols used to conduct the evaluation. The Project Work Plan is a consensus-based document and includes peer review and input from industry experts. Each Project Work Plan is adopted after receiving at least two-thirds affirmative support from 52 AASHTO member states. The Project Work Plan is the basis for host states to conduct their testing and evaluation. When implemented by state DOTs, their own state standard specifications may supersede the NTPEP Project Work Plan. Industry is advised to be aware of state-level requirements, which may supersede basic NTPEP testing.
Companies or associations that would like to be affiliated with the NTPEP Concrete Admixtures or Concrete Curing Compounds program should contact the liaison for additional information.