No abstract

The critical element for sustainable growth in the construction industry is the development of alternative cements. A new technological process called geopolymerization provides an innovative solution, and the presence of aluminum and silicon oxides in fly ash has encouraged its use as a source material. Many previous investigations have involved curing the binder in a heated environment. To reduce energy consumption during the synthesis of geopolymers, the present study investigated the properties of ambient cured geopolymer mortar at early ages. An experimental program was executed to establish a relationship between the activator composition and the properties of geopolymer mortar in fresh and hardened states. Concentrations of sodium hydroxide and sodium silicate were ascertained that are advantageous for constructability and mechanical behavior. Scanning electron microscopy, energy dispersive X-ray spectroscopy and X-ray diffraction techniques were also used to characterize the material. Test results indicate that there is potential for the concrete industry to use fly ash based geopolymer as an alternative to portland cement.

No abstract

Dr. Torres, a native of New Mexico, joined the Department of Engineering Technology (Concrete Industry Management program) in August 2013 where he teaches Concrete Construction Methods and a variety of project management courses. He received both of his graduate degrees, Ph.D. and M.S., in Civil Engineering (Structural), from the University of New Mexico. He obtained his B.S. degree, also in Civil Engineering, from New Mexico State University. Dr. Torres' research areas include the science and advancement of materials, such as concrete and cementitious materials, glass fibers, and composite materials. Dr. Torres' research interest also extends to the classroom, where he is constantly evolving his courses to provide the best education to his students.

No abstract