Title:
Lab Studying Greenhouse Effect on Concrete Setting
Author(s):
A. S. Wagh, D. Singh, and L. Knox
Publication:
Concrete International
Volume:
17
Issue:
4
Appears on pages(s):
41-42
Keywords:
carbonation; chemical composition; chemical tests; portland cement concretes; precast concrete; reinforced concrete; structural steels; General
DOI:
Date:
4/1/1995
Abstract:
A novel process has been developed to carbonate cement for rapid setting of cement-containing products. The process may reduce the cost of manufacturing precast cement products, and may also be used to sequester greenhouse carbon dioxide produced by the cement industry, and recycle it in cement-containing products. Typically, 10-24 wt. percent of the CO 2 produced during cement production may be captured and used to make cement that sets rapidly. Unlike in the direct carbonation process, this method allows steel reinforcement of concrete. The new process will save time and money for the cement industry and will aid in compliance with the Clean Air Act by sequestering greenhouse CO 2. The process may also be used for quick restoration of infrastructure after natural disasters, construction for defense-related structures in war zones, and as rapid-setting grouts for environmental remediation.