Structural thermal break systems for buildings: Feasibility study: Final report
This report presents results from the first phase of a program to investigate lightweight concrete systems for potential use as structural thermal breaks in buildings. The primary objective of the project is to develop a portland cement concrete with sufficient thermal resistance and strength properties to serve as an effective structural thermal break in building envelopes. Desirable properties of the proposed concrete are a density of less than 50 pcf (800 kg/m/sup 3/), a compressive strength of 1000 to 1500 psi (6.9 to 10.3 MPa), and a thermal conductivity of less than 1.5 Btu . in./h . ft/sup 2/ . /sup 0/F (0.22 W/m . K). The first phase of work, presented in this report, is a feasibility study to identify uses for the lightweight portland cement concrete. The report is subdivided into three sections. Section 1 presents suggested assemblies where lightweight concrete can be used in place of steel, other metal, or normal weight concrete to prevent thermal bridges or thermal bypasses. Potential uses for the proposed lightweight concrete include exterior walls, interior walls, columns, chimneys, foundations, and floor slabs. Thermal conductivity of the proposed lightweight concrete is approximately 1/10th that of normal weight concrete and 1/100th that of steel.
- Research Organization:
- Construction Technology Labs., Skokie, IL (USA); Oak Ridge National Lab., TN (USA)
- DOE Contract Number:
- AC05-84CE21006; AC05-84OR21400
- OSTI ID:
- 5930003
- Report Number(s):
- ORNL/Sub-84-21006/1; ON: DE88001508
- Resource Relation:
- Other Information: Portions of this document are illegible in microfiche products. Original copy available until stock is exhausted
- Country of Publication:
- United States
- Language:
- English
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