|Statement||by Armin Petzold and Manfred Röhrs; translated (from the German) by A. B. Phillips and F. H. Turner.|
|The Physical Object|
|Pagination||235 p. :|
|Number of Pages||235|
The degradation of concrete by exposure to high temperatures is, however, known to be severe because of the rapid decrease in its strength when subjected to temperatures higher than °C Author: Izabela Hager. item 3 Concrete for High Temperatures by Rohrs, Manfred Hardback Book The Fast Free - Concrete for High Temperatures by Rohrs, Manfred Hardback Book The Fast Free. $ Free shipping. No ratings or reviews yet. Be the first to write . At higher temperatures (above about degrees F), high-heat-resistant concrete is generally needed. Light-weight aggregates have proven to be more heat resistant and so that is the first step--use lightweight. When temperatures get extremely high, (above degrees F), calcium aluminate cement produces a fire-resistant concrete. Design of concrete for better performance at high temperatures should aim at minimizing contributions to strength loss, while exploiting the processes responsible for gain in strength. It appears that, in its hydraulic state of binding, a rheological criterion limits the structural usefulness of Portland cement concrete to temperatures of ° by:
ISBN: OCLC Number: Notes: Translation of Beton für hohe Temperaturen. Description: pages illustrations 25 cm: Other Titles. Additional Physical Format: Online version: Cruz, C.R. Thermal expansion of Portland cement paste, mortar, and concrete at high temperatures. Skokie, Ill.: Portland. High temperatures also affect the compressive strength of concrete. Above º F, the cement paste begins to dehydrate (loses chemically combined water of hydration), which gradually weakens the paste and paste-aggregate bond. The temperature that concrete has reached often can be determined by observing color changes in the aggregate. For. Publisher Summary. This chapter examines the strength of concrete at elevated temperatures. A device for testing the mechanical behavior of concrete at elevated temperatures must include three systems: a system for heating and temperature control, a system to support and load the specimen, and a system of measuring and recording instruments.
Aggregates- studies of concrete heated to high temperatures indicate that the type of aggregate employed is critical. Nevertheless, no standard specifications have been developed. Water- the effect of quality of water used in concrete has not been studied in relation to performance of concrete under high temperatures. Definition and types of spalling. As the most typical form, spalling is defined as the violent or nonviolent breaking off of layers or pieces of concrete from the surface of a structural element when exposed to high and rapidly rising temperature under fire conditions .Gary  suggested that spalling could be grouped into four categories: (a) aggregate spalling, (b) corner spalling, Cited by: 1. Concrete for High Temperatures Hardcover – January 1, See all 2 formats and editions Hide other formats and editions. Price New from Used from Hardcover "Please retry" — — $ Hardcover from $ Manufacturer: Maclaren and Sons. When temperature is very high, such as above °C, porosity and microstructure of concrete are smaller and better than those at a lower temperature due to concrete has been sintered at such a high temperature,.However, it does not indicate that the mechanical properties of concrete at the very high temperature was better than those at a lower temperature as the Cited by: