Download or read book Environmental Scanning Electron Microscopy of High Volume Fly Ash Concrete written by and published by . This book was released on 1993 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: The environmental scanning microscope (ESEM) allows observation of unprepared samples in water vapour atmospheres of up to 20 torr. It should therefore be possible to observe concrete specimens at early stages of their hydration without their first being dried and coated with a conductive layer, as is necessary with a conventional scanning electron microscope. The project was conducted to determine the feasibility of studying concrete at its early stages and to compare the hydration of fly ash cement concrete with that of ordinary Portland cement concrete.