Utilizing silica-rich waste material for enhancing the properties of concrete and its environmental assessment.

Some of the industrial solid waste materials, despite having sizeable quantities of silica and alumina, do not meet the requirements of a supplementary cementitious material (SCM) as per ASTM C618. Conversely, these materials may well be classified as alternative supplementary cementitious materials (ASCM) in accordance with ASTM C1709. Even though they have the potential of enhancing the properties of concrete and promoting sustainability, these materials are often underutilized in construction.

Experimental Investigation of Hybrid Beams Utilizing Ultra-High Performance Concrete (UHPC) as Tension Reinforcement.

Ultra-high performance concrete (UHPC) is a new generation concrete with extremely high tensile and compressive strength, high durability, and ductility. UHPC offers tremendous opportunities for use in new thin and slender structural concrete elements and repair of existing concrete structures and has an excellent potential to replace conventional steel reinforcement in normal concrete (NC) members. This paper investigated the potential application of a hybrid NC-UHPC beam using a thin UHPC layer on the tension face to cater to tensile stresses, eliminating the need for passive steel reinforcement.

Novel Expandable Cement System for Prevention of Sustained Casing Pressure and Minimization of Lost Circulation.

Sustained casing pressure (SCP) is a common issue in the oil and gas industry. There were several solutions applied to contain it either by mechanical means or by injecting high-performing cement slurries. There are some limitations associated with these solutions such as volume loss, mechanical failures, limited expansion, exact spotting, and material deterioration with time.