EFFECT OF HIGH TEMPERATURES ON CONCRETES INCORPORATING DIFFERENT AGGREGATES

Technical Report · Sun May 01 04:00:00 EDT 1960

OSTI ID:4135162

Zoldners, N G

Available as Can. Dept. Mines and Tech. Surveys, Mines Branch Research Rept. R-64. 25. Changes in physical properties of concrete beams and cylinders made with gravel, sandstone, limestone, and expanded-slag aggregates were studied after exposure to various temperatures ranging from 100 to 800 deg C. Results indicated that the residual compression strength of concrete increased up to 10% when the specimens were heated up to 300 deg C, whereas the flexural strength decreased 34% with limestone and 55% with gravel aggregate. After 560 deg C exposure, losses in strength of corresponding concretes were 19 to 24% in compression and 58 to 80% in flexure. ln temperatures over 506 deg C the residual strength of all types of concrete decreased sharply due to dehydration of chemical constituents in the cement paste. Results from the four types of concrete investigated indicate that limestone concrete gave the best performance up to 760 deg C, at which temperature decomposition of carbonates on the surface of test specimens was observed. (auth)

• Research Organization: Canada. Dept. of Mines and Technical Surveys. Mines Branch
• NSA Number: NSA-14-025950
• OSTI ID: 4135162
• Report Number(s): NP-9226
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

CALCIUM CARBONATES
CARBONATES
CEMENTS
CONCRETES
DECOMPOSITION
EXPANSION
HIGH TEMPERATURE
LIMESTONE
MECHANICAL PROPERTIES
METALS, CERAMICS, AND OTHER MATERIALS
PERFORMANCE
REPORT
ROCKS
SAND
SANDSTONES
SLAGS
SURFACES
TEMPERATURE