Lightweight Concrete: Development of Mild Steel in Tension

Greene, Gary; Graybeal, Benjamin A.; United States. Federal Highway Administration. Office of Infrastructure Research and Development

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Lightweight Concrete: Development of Mild Steel in Tension

2014-01-01
By Greene, Gary ; Graybeal, Benjamin A.

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Details:

Creators:

Greene, Gary ; Graybeal, Benjamin A.

Greene, Gary ; Graybeal, Benjamin A. Less -
Corporate Creators:

United States. Federal Highway Administration. Office of Infrastructure Research and Development
Corporate Contributors:

PSI, Inc.
Subject/TRT Terms:

[+]

Bond Strength Bond Strength (Chemistry) Bridge Design Development Development Length Lightweight Concrete Load And Resistance Factor Design LRFD Design Specifications LWC Splice Length Splicing
Publication/ Report Number:

FHWA-HRT-14-029
Resource Type:

Tech Report
Geographical Coverage:

United States
Corporate Publisher:

United States. Federal Highway Administration. Office of Infrastructure Research and Development
Abstract:

Much of the fundamental basis for the current lightweight concrete provisions in the AASHTO LRFD Bridge Design Specifications is based on research of lightweight concrete (LWC) from the 1960s. The LWC that was part of this research used traditional mixes of coarse aggregate, fine aggregate, portland cement, and water. Broad-based advancement in concrete technology over the past 50 years has given rise to significant advancements in concrete mechanical and durability performance. This document describes the results of tests on high-strength LWC splice beams that were conducted as part of an overall FHWA research project on LWC. The FHWA test results are included in a database of bond tests with over 200 tests on LWC specimens available in the literature. An analysis of the database was used to develop potential revisions to provisions related to LWC within Chapter 5 of the AASHTO LRFD Specifications. The framework for addressing LWC in the specifications that was proposed previously as a part of this research effort is applied to the design expression for development length of mild steel. The framework includes a proposed revision to the definition of LWC and a proposed modification factor relevant to LWC structural performance.
Content Notes:

This document was developed by research staff at the Turner-Fairbank Highway Research Center. Portions of the work were completed by PSI, Inc. under contract DTFH61-10-D-00017. Gary Greene of PSI, Inc. and Trine University, who is the lead contract researcher on FHWA’s lightweight concrete research efforts, and Ben Graybeal of FHWA, who manages the FHWA Structural Concrete Research Program, developed this document.
Format:

PDF
Funding:

DTFH61-10-D-00017
Collection(s):

Federal Highway Administration
Main Document Checksum:

[+]

urn:sha256:66ba3f7d72996e2f5da1955ca7fa315bba96d8e3a7e48057297d86cb44bd7361
Download URL:

https://rosap.ntl.bts.gov/view/dot/50228/dot_50228_DS1.pdf
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Lightweight Concrete: Development of Mild Steel in Tension

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