Portland cement and blended cement are hydraulic cements that react chemically with water to form a hardened paste. This paste along with aggregates form concrete, which is one of the most commonly used materials in the world. This technical committee defines the evaluation procedures for portland & blended cement (PBC) which will serve as the standard testing protocol for AASHTO’s NTPEP for these materials. Currently, the laboratory evaluation will be in accordance with AASHTO M85 or ASTM C150 for Portland cement or AASHTO M240 or ASTM C595 for Blended Cements.
The NTPEP Project Panel responsible for authoring the Project Work Plan convenes yearly at the NTPEP National (Annual) Meeting. During this working meeting, the Project Work Plan is discussed; changes made, and shortly thereafter balloted for adoption. Improvements are immediately implemented in the next available testing cycle.
NTPEP Designated Lab:
- American Engineering Testing, Inc.
- SGS TEC Services
- CTL Group
NTPEP - Portland and Blended Cement
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 Portland and Blended Cement program should contact Courtney Wallace (email@example.com) for additional information.