ARMY - UFGS-32 13 13.43
HIGH TEMPERATURE CONCRETE PAVING FOR AIRFIELDS USING LIGHTWEIGHT AND TRAPROCK AGGREGATES
|Publication Date:||1 February 2018|
This specification is for concrete pavements exposed to temperatures of 482 degrees C 900 degrees F or higher, referred to herein as High Temperature Concrete. Heat Resistant recommendations exist for concrete exposed to moderate temperatures of 149 to 482 degrees C 300 to 900 degrees F per ETL 14-2 but are also applicable to the specification. Those responsible for design and construction of High Temperature Concrete pavement should familiarize themselves with the most current criteria pertaining to High Temperature Concrete. The most current criteria may be obtained from the cognizant Corps of Engineers Transportation Systems Center (TSMCX), the Air Force Civil Engineer Center (AFCEC) pavement Subject Matter Expert (SME), or Naval Facilities Engineering Command (NAVFAC, Echelon III) Pavement Engineer.
This specification is based on ETL 14-4, Vertical Landing Zone (VLZ) and Other Airfield Pavement Design and Construction Using High Temperature Concrete and NAVFAC EXWC Technical Report - traprock Aggregate Characterization for High Temperature Concrete.
Tailoring options are for both traprock & lightweight aggregates (TRAPROCK & LIGHTWEIGHT), traprock aggregate only (TRAPROCK), lightweight aggregate only (LIGHTWEIGHT), US customary and metric units. To properly tailor this specification, choose one of the three Tailoring options and hide the other two. For instance, if you chose TRAPROCK & LIGHTWEIGHT to show both, you would hide the individual Tailoring options for TRAPROCK and LIGHTWEIGHT. When tailoring for traprock or lightweight, check for bracketed items to edit. Use the traprock tailoring option whenever possible. Traprock aggregates require deleterious materials and Alkali-Silica Reaction testing similar to normal airfield concrete; lightweight aggregates are a manufactured product to ASTM C330/C330M standards and do not require deleterious or Alkali-Silica Reaction testing.
This specification includes the ability to place the thigh temperature concrete via hand placement with a vibrating truss screed, or a fixed or slipform paver. Continuously reinforced concrete placements must always be performed with a vibrating truss screed. It is encouraged to avoid using a slipform paver, however there are some plain jointed applications where this method of placement would be advantageous.
This specification is to be used only with the written approval of the cognizant Corps of Engineers Transportation Systems Center (TSMCX), the Air Force Civil Engineer Center (AFCEC) pavement Subject Matter Expert (SME), or Naval Facilities Engineering Command (NAVFAC, Echelon III) Pavement Engineer.
If used on Design/Build projects, this section must be prepared by the Government RFP preparer. Edit this guide specification for project specific requirements by deleting non applicable paragraphs only. For bracketed items, choose applicable items(s) or insert appropriate information. No further edited by the contractor's designer of record, unless specifically stated otherwise in the contract documents is authorized.