Heat transfer characteristics of a structural lightweight concrete wall. Final report
Tests were conducted to evaluate thermal performance of three concrete walls. A normal-weight concrete wall, a structural lightweight concrete wall, and a low density concrete wall were tested in the calibrated hot box facility of Construction Technology Laboratories, a division of the Portland Cement Association. This report covers experimental results for the structural lightweight concrete wall. Test results for the normal-weight concrete wall and low density concrete wall are covered in separate reports. The wall was subjected to steady-state, transient, and periodically varying temperature conditions in a calibrated hot box. Steady-state tests were used to define heat transmission coefficients. Data obtained during transient and periodic temperature variations were used to define dynamic thermal response of the wall. Thus, effects of heat storage capacity could be evaluated. Conductivities derived from calibrated hot box tests were compared with results from hot wire tests. Hot wire tests were also used to evaluate the influence of moisture on thermal conductivity. Data obtained from dynamic tests were compared with steady-state calculations. Data obtained in this investigation are applicable to concrete wall assemblies commonly used in multi-family residential, commercial, and industrial structures. Results provide a data base for evaluation of building envelope performance in such structures, and are also applicable for defining thermal characteristics of concrete walls in passive solar systems. 21 refs., 33 figs., 19 tabs.
- Research Organization:
- Construction Technology Labs., Skokie, IL (USA)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 5101872
- Report Number(s):
- ORNL/SUB-79-42539/2; ON: DE86001471
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
BUILDINGS
WALLS
CONCRETES
COMPRESSION STRENGTH
SPECIFIC HEAT
TENSILE PROPERTIES
THERMAL CONDUCTIVITY
CALIBRATION
CAPACITY
DENSITY
EXPERIMENTAL DATA
HEAT FLUX
HEAT STORAGE
MEASURING INSTRUMENTS
MOISTURE
RESIDENTIAL BUILDINGS
STEADY-STATE CONDITIONS
TEMPERATURE DISTRIBUTION
TEST FACILITIES
TRANSIENTS
BUILDING MATERIALS
DATA
ENERGY STORAGE
INFORMATION
MATERIALS
MECHANICAL PROPERTIES
NUMERICAL DATA
PHYSICAL PROPERTIES
STORAGE
THERMODYNAMIC PROPERTIES
420400* - Engineering- Heat Transfer & Fluid Flow
360600 - Other Materials