Reinforced Concrete Beams Without Shear Reinforcement Using Fiber Reinforced Concrete and Alkali-Activated Material

Abstract

Concrete, which is based on the use of Portland cement as a binder, often becomes a construction material in the construction industry. Concrete itself, however, exists in a number of modifications that are intended for specific applications. Especially with regard to the development of materials engineering, variants were created, which include, for example, fiber reinforced concrete with improved tensile properties and alkaline-activated composite, which produces less CO2 emissions. The aim of the presented article is to verify the concept of using a combination of reinforced concrete and alkaline-activated material in the application of reinforced concrete beams without shear reinforcement. Components of the experimental program are static load tests, which are evaluated in detail with regard to the formation and propagation of cracks. Laboratory tests are also part of the experimental program, which focus on a detailed description of the properties and the possibility of a technological solution.

Properties of Selected Alkali-Activated Materials for Sustainable Development

“…Possible solutions include the use of hybrid cements [11]. Research and testing of alkaline activated materials [12,13,14] has been going on for several decades, but its use in practice is still at an early stage. Frequent limitations of experimental programs include that they focus only on one selected property or description, and the characterization of the materials used is insufficient for wider generalization [15,16].…”

The Influence of the Prestressing Level of the Fully Threaded Anchor Bar on the Corrosion Rate

“…Therefore, it is necessary to perform the accelerated corrosion test on prestressing steel bars at different levels of applied tensile stress. Since the corrosion rate of steel in atmospheric corrosion conditions is relatively slow [17][18][19][20][21][22][23][24][25][26][27][28][29][30][31], it is difficult to achieve the expected degree of corrosion in a short period of time. Therefore, electrochemical corrosion was used in the presented experimental measurements [32][33][34][35], which achieved a significant degree of corrosion in a relatively short time by analyzing the effect of corrosion on prestressing steel bars.…”