The effect of heat treatment of inner product CSH

✍ Scribed by K.L. Scrivener

• Publisher: Elsevier Science
• Year: 1992
• Tongue: English
• Weight: 155 KB
• Volume: 22
• Category: Article
• ISSN: 0008-8846
• DOI: 10.1016/0008-8846(92)90051-v

✦ Synopsis

For many precast applications concrete undergoes a period of curing at elevated temperatures to accelerate the development of strength. In many cases the concrete may continue to hydrate after the heat treatment. Relatively little work has been published on the direct observation of the microstructures of pastes or concretes cured at elevated temperatures and subsequently stored under moist conditions. Kjellsen et al (1,2) noted that in pastes cured at 50°C the hydration shells of inner product that developed around the larger grains appeared brighter in backscattered electron images than the remaining C-S-H. The grey level of this inner C-S-H approached that of the calcium hydroxide, making it difficult to distinguish between the two.