Eco-friendly external strengthening system for existing reinforced concrete beams

Ecologically Safe and Techno Economically Efficient Reinforced Concrete Constructions of Equal Resistance

“…A lot of scientists devote their scientific works to this problem. We can see the parts of this theme in the works of F. Bencardino [1]; Green concrete production with ceramic wastes and laterite [2]; Strength and ductility characteristics of reinforcing steel bars milled from scrap metals [3]; Evaluation of the flexural behavior of composite beam with inverted-T steel girder and steel fiber reinforced ultra high performance concrete slab [4]; Predicting the post-cracking behavior of normal-and highstrength steel-fiber-reinforced concrete beams [5]; High-volume natural volcanic pozzolan and limestone powder as partial replacements for portland cement in self-compacting and sustainable concrete [6]; Improving degradation resistance of sisal fiber in concrete through fiber surface treatment [7]; Experimental investigations of size effect in reinforced concrete beams failing by shear [8]; Utilization of coal-and biomass-fired ash in the production of self-consolidating concrete [9]; Theoretical and experimental study on mechanical properties and flexural strength of fly ash-geopolymer concrete [10]; A review of waste products utilized as supplements to Portland cement in concrete [11]; Benefits of using blended waste coarse lightweight aggregates in structural lightweight aggregate concrete [12]; Evaluation of various treatment methods for enhancing the physical and morphological properties of coarse recycled concrete aggregate [13]; Time-dependent behaviour of steel tubular columns filled with recycled coarse aggregate concrete [14]; Investigation of using recycled powder from waste of clay bricks and cement solids in reactive powder concrete [15]; Eco-friendly concretes with reduced water and cement contents -Mix design principles and laboratory tests [16]; Recycling lead-based paint contaminated deconstructed masonry materials as aggregate for Portland cement concrete-…”

“…For single-span beams, as well as consoles from metal or wood, in this way almost ideal elements of equal resistance could be achieved. In reinforced concrete it is more difficult, however creation of variable section of elements in this case also leads to significant effect [1,2,3].…”

“…Taking into consideration that reinforced concrete constructions today and in the nearest future are being the basis of construction the issues of increase of their ecologic safety and techno economical attractiveness are rather pressing [1][2][3][4][5].…”

An Analytical Model for FRP Debonding in Strengthened RC Beams under Monotonic and Cyclic Loads

“…Although the assumption of constant curvature at debonding was also adopted in the theoretical analysis carried out by Bencardino and Condello (2016), experimental data sets produced by other researchers (Ceroni and Pecce 2005;Esfahani et al 2007;Ceroni 2010;Obaidat et al 2011;Spadea et al 2015), and also the tested beams herein show that assuming the constant deflection and curvature during debonding is not valid and can be resulted in significant error in predicting the load of debonding failure. In contrast with assuming the constant deflection during debonding, the above mentioned results indicate that the deflection and curvature of the beam increases by 7-15 %, during debonding failure.…”

Experimental Investigation and Numerical Analysis of Bond Behavior in SRG-Strengthened Masonry Prisms Using UHTSS and Stainless-Steel Fibers

“…Reinforcing fabrics/fibers could be made of steel [2], basalt [3], polyparaphenylene-benzobisoxazole (PBO) [4], carbon [5], aramid or glass [6] and basalt. Many experimental works are available in the literature on FRCM/SRG-concrete bond tests [2][3][4][5][6], flexural strengthening using traditional [7] and innovative eco-friendly [8] technique and on axial behavior of confined masonry columns [9].…”