Flexural strength

The scope of this work is threefold: (i) to develop a new model within the framework of hydro-mechanical – damage coupling that can account for the coupling between microcrack (damage), water diffusion and shrinkage at stake for concrete secondary creep; (ii) to implement it in an existing hydro-damage lattice model; (iii) to validate the model with respect to the flexural creep of Fiber Reinforced Concrete (FRC) and Mortars under high sustained load level.

12p vibecca 01-10-2024 2 1   Download

This study shows that the stirrups corrosion should receive more attention in the serviceability limit state due to its considerable effect on flexural behavior. Based on a parametric study, it shows that the effect of the crosssection loss of tension reinforcements on the load-carrying capacity of the corroded beam is more significant than the bond strength reduction.

14p vifilm 24-09-2024 3 1   Download

Drying shrinkage is the main cause of early age cracking of concrete and mortar. A wide range of research has been conducted to reduce the drying shrinkage, including using fibres or chemical admixtures. This paper investigated the effect of shrinkage reducing admixture on the flexural strength, compressive strength, drying shrinkage, water absorption and porosity of mortar.

13p vifilm 24-09-2024 2 1   Download

The present research aims to investigate the influence of the ratio of reinforced concrete layer height to total height (h/H) on the mechanical properties of functionally graded concrete (FGC) containing fly ash (Fa) and polypropylene (PP) fiber.

14p vifilm 24-09-2024 2 1   Download

In this paper, a simplified calculation method based on Russian design standard SP 468.1325800.2019 is introduced to determine the flexural strength of RC T-beams when exposed to ISO 834 standard fire.

13p vifilm 24-09-2024 4 1   Download

This paper addresses the strength and deformation capacity of slender columns retrofitted by externally bonded Carbon Fiber-Reinforced Polymers (CFRP) subjected to seismic loading. The behaviour of RC columns depending on the CFRP confinement (carbon CFRP jacket) and on flexural reinforcement (carbon plates) was analysed by a nonlinear finite element method based on multilayer shell element and multifiber beams with plasticity and damage models.

7p viyoko 24-09-2024 2 1   Download

This study investigated experimental bearing capacity of corroded reinforced concrete beams. Six testing beams were made of concrete having compressive strength of 25 MPa, with the dimensions of 80 x 120 x 1200 mm. They were divided into two groups depending of tension reinforcement ratio.

11p viyoko 24-09-2024 3 1   Download

This paper presents an experimental study on the effect of prestressing force on the flexural behavior of unbonded prestressed concrete (UPC) strengthened by Carbon fiber reinforced polymer (CFRP) sheets. The testing program was carried out on nine large-scale UPC rectangular beams.

18p vifaye 20-09-2024 4 1   Download

The distance from the nearest concrete exposed surface to the centroidal axis of main longitudinal steel reinforcing bars, so-called axis distance, plays a critical role in ensuring the safety of reinforced concrete (RC) structures under fire, as it helps the rebars not being directly exposed to heating in a fire incident.

10p vifaye 20-09-2024 4 2   Download

The purpose of this research is to analyse the available design equations and present the applicability of these equations for their use in the design of beams made of higher concrete strengths. In the present program concrete having compressive strength of 50MPa or more is considered as high strength concrete. Analytical investigation on HSC beams is made under four different aspects namely flexure, ductility, deflection and shear.

330p runthenight07 01-03-2023 7 3   Download

Fresh self-compacting steel fibre-reinforced concrete (SCSFRC) of strength class 30 MPa was casted into the small (100x100x400 mm3 ) and large (100x300x400 mm3 ) moulds. The large specimen was splitted into three small identical ones (100x100x400 mm3 ). All of the specimens were subjected to third-point bending in as-cast direction.

6p vivientiane2711 29-06-2020 11 0   Download

In recent years, efforts have been made to produce advanced composite materials in order to lessen environmental impact and to extent sustainability. Traditional materials are largely substituted by composites due to their greater properties like flexural strength, low thermal expansion and high strength.

10p tohitohi 19-05-2020 20 0   Download

In this paper, the influences of additive aluminum oxide and hydroxyapatite nanoparticles on the mechanical and strength properties of PMMA (including flexural strength, impact strength, surface hardness and shrinkage behavior) is studied experimentally.

10p tohitohi 19-05-2020 41 3   Download

The application of prestressing steel is restricted in highly corrosive environment area due to corrosion of prestressing steel, which leads to reduction in strength and it may cause sudden failure. Carbon textile is considered as an alternate material due to its corrosive resistance property, high tensile strength and perfectly elastic. In this study, an experimental investigation was carried out to study the flexural behavior of prestressed and non-prestressed carbon textile reinforced concrete plates.

9p thayboitinhyeu 02-03-2020 28 2   Download

The effect of maleic anhydride grafted polypropylene (MAPP) on mechanical properties of bamboo fiber mat reinforced polypropylene composites (BMRPC) was studied. The results showed that mechanical properties of the composite depend on the amount of MAPP and those attained maximum values at 6 % MAPP. The effects of bamboo fiber mat contents on mechanical properties were also investigated. Maximum values for the tensile, flexural and impact strengths of BMRPC were obtained at a bamboo fiber mat content 45% (by weight).

8p uocvong01 24-09-2015 132 3   Download

This paper presents the result of research on equipment development of vacuum injection molding technique for preparation the chopped bamboo fiber polymer composite and some properties of obtained composite material. For the vacuum injection molding technique, firstly the dry fibers were plated in the mold. Then the mold was closed by the vacuum bag, the air inside the mold was sucked out by a vacuum pump, due to the difference of the pressure in side and outside the mold, the polymer liquid was transferred to the closed mold and impregnated the bamboo fiber.

7p uocvong01 24-09-2015 68 4   Download

The preparation and mechanical properties of bamboo - glass fiber mat reinforced polyropylene hybrid composite (BGMRPC) were investigated. The results showed that properies of the composite depend on the amount of glass fiber mat and the hybrid method. Replacing 13.5% of bamboo fiber mat by glass fiber mat, the tensile, flexural and impact strengths of BGMRPC were increased by 33%, 28% and 79% respectively comparing to bamboo fiber mat reinforced polypropylene composite (BMRPC). The moisture absorption of BMRPC and BGMRPC was studied and compared.

7p uocvong01 24-09-2015 45 3   Download

The mechanical and electrical properties of polymer composite materials based on bamboo wafer reinforced phenol formaldehyde resin have been studied. The tensile, flexural and impact strengths of composite materials have been decreased significantly when using the short bamboo fibre instead of the bamboo wafer.

6p uocvong02 24-09-2015 63 9   Download

This paper will show the results of the first experiments to get nano-clay clay composite materials based on modified polystyrene resin by melt - mix method. The intercalated nanocomposite structures are characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM) techniques. Polystyrene nano-composites with 2% nanoclay by weight exhibit an increases about 10% in impact resistance and they also lower the water absortion (nearly 60% compared with polystyrene resin) without any significant loss of tensile strength, flexural strength and flexural modulus.

6p uocvong01 24-09-2015 66 10   Download