Flexural behavior of fanpalm reinforced concrete slabs

2017 ◽  
Vol 13 ◽  
pp. 63-67
Author(s):  
M.T. Audu ◽  
A.A. Raheem
Keyword(s):  
Reinforced Concrete ◽  
Flexural Behavior ◽  
Concrete Slabs ◽  
Reinforced Concrete Slabs

scholarly journals Experimental study on flexural behavior of GFRP reinforced concrete slabs

2021 ◽  
Vol 676 (1) ◽  
pp. 012060
Author(s):  
Sun Li-xiang ◽  
Lin Peng-zhen ◽  
Yang Zi-jiang ◽  
Liu Ying-long ◽  
Shen Qu
Keyword(s):  
Experimental Study ◽  
Reinforced Concrete ◽  
Flexural Behavior ◽  
Concrete Slabs ◽  
Reinforced Concrete Slabs

Flexural behavior of sustainable reactive powder concrete bubbled slab flooring elements

2017 ◽  
Vol 3 (2) ◽  
pp. 81 ◽  
Author(s):  
Ashraf Abdulhadi Alfeehan ◽  
Hassan Issa Abdulkareem ◽  
Shahad Hameed Mutashar
Keyword(s):  
Reinforced Concrete ◽  
Ultimate Load ◽  
Steel Fibers ◽  
Flexural Behavior ◽  
Reactive Powder Concrete ◽  
Concrete Slabs ◽  
Concrete Floor ◽  
Reinforced Concrete Slabs ◽  
Reactive Powder ◽  
Floor System

Voided slabs are reinforced concrete slabs in which voids allow to reduce the amount of concrete. The bubbled deck slab is a new and sustainable biaxial floor system to be used as a self-supporting concrete floor. The use of voided slabs leads to decrease the consumption of materials and improve the insulation properties for enhancing the objectives of sustainability. This study presents an investigation into the flexural behavior of sustainable Reactive Powder Concrete RPC bubbled slab flooring elements. Six one-way slabs were cast and tested up to the failure. The adopted variables in this study are: the volumetric ratio of steel fibers, type of slab; bubbled or solid, placing of reinforcement and thickness of slab. The effect of each variable on the ultimate load, deflection and strain has been discussed. The results show that increasing the percent of steel fibers from 1% to 2% in solid and bubbled slabs decreases the deflection by (18.75%) and (50%) respectively. As well as, the deflection increases by (41%) for bubbled slab compared to the solid slab. The slabs reinforced with top and bottom steel meshes show less deflection than slabs reinforced by only bottom steel mesh.

scholarly journals Flexural Behavior of Reinforced Concrete Slabs Reinforced with Innovative Hybrid Reinforcement of Geogrids and Steel Bars

Buildings ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 161
Author(s):  
Ramy Nasr Abdelmonem Mohamed ◽  
A.M. El Sebai ◽  
Ahmed Shaban Abdel-Hay Gabr
Keyword(s):  
Reinforced Concrete ◽  
Peak Load ◽  
Absorption Capacity ◽  
Flexural Behavior ◽  
Concrete Slabs ◽  
Displacement Ductility ◽  
Reinforcement System ◽  
Reinforced Concrete Slabs ◽  
Steel Bars ◽  
Hybrid Reinforcement

This paper aims to innovate a hybrid reinforcement system for concrete slabs, consisting of geogrids and steel bars, by conducting an experimental comparative study between using different types, tensile strengths, and layers of geogrids as additional reinforcement to steel bars in comparison to conventional steel-reinforced concrete control slab. These concrete slabs were tested under a four-point loading system until they failed due to bending. As an addition, strain gauges were attached to the concrete slabs bottom reinforcement (geogrids and steel bars) to provide a close examination of geogrids and steel bars as a hybrid reinforcement system. Results show that the innovated hybrid reinforcement system of uniaxial geogrids and steel bars more preferred as concrete slabs reinforcement as it provided more benefits values (including, but not limited to, initial-peak load, steel-yield load, post-peak load, displacement ductility index, and energy absorption capacity) and more efficient utilization (including, but not limited to, higher benefits to cost values and better flexural performance) than the case of using conventional reinforcement of steel bars and the cases of using triaxial geogrids as additional reinforcement to the steel bars; however, triaxial geogrids provide lower deflection values and higher first-crack load values.

scholarly journals Flexural Behavior Performance of Reinforced Concrete Slabs Mixed with Nano- and Microsilica

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Rakesh Kancharla ◽  
Venkata Rao Maddumala ◽  
T. V. N. Prasanna ◽  
Lokaiah Pullagura ◽  
Ratna Raju Mukiri ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
High Performance ◽  
High Performance Concrete ◽  
High Strength ◽  
Flexural Behavior ◽  
Concrete Slabs ◽  
The Past ◽  
Reinforced Concrete Slabs ◽  
Concrete Mix ◽  
Bending Behavior

Present technology has been evaluated greatly over the past decades, where new particles are being designed and fabricated to fulfill specific needs. The field of nano- and micromaterials has prospered in many disciplines. It has been recently used in reinforced concrete in the production of high-strength, high-performance concrete. Microsilica (MS) and nanosilica (NS) particles have proven to be highly profitable to the concrete mix. Concrete has become denser with considerable improvement in their mechanical characteristics, particularly compressive strength. This proposed method includes a comparative study of the flexural bending behavior of conventional reinforced concrete (without MS or NS) slabs with other slabs. Each has various mixes of MS and NS particles incorporated into the concrete mix. The material content utilized in the slabs is kept constant by replacing a portion of the cement with an equivalent amount of either NS or MS particles or both. MS particles are altered from 0, 5, and 10% while NS particles are altered from 0, 0.5, and 1.0%. It cracks the widths and has higher final load-bearing capacity.

scholarly journals Elevated Temperature Effects on the Behavior of One-Way Fi-brous Reinforced Concrete Slabs

2018 ◽  
Vol 7 (4.37) ◽  
pp. 179
Author(s):  
Dr. Mazin B. Abdul-Rahman ◽  
Dr. Alya'a A. Al-attar ◽  
Amenah M. Younus
Keyword(s):  
Reinforced Concrete ◽  
Elevated Temperature ◽  
Fly Ash ◽  
Volume Fraction ◽  
Steel Fibers ◽  
Flexural Behavior ◽  
Concrete Slabs ◽  
Static Loads ◽  
Reinforced Concrete Slabs ◽  
Rate Of Increase

In this research, the effect of elevated temperature on the flexural behavior of one-way reinforced concrete slabs under service static loads contain different volume fraction (0.25% , 0.75% and 1.25%) of steel fibers and different addition ratios (15%, 20% and 25%) of fly ash in addition to the reference slabs with not any additives  was studied. For this purpose, thirty cylinders (150 *300)mm , thirty prisms (100 * 100 * 500)mm and forty one-way slabs (900 * 350 * 70) mm were cast and tested. The one-way tested slabs were divided into two groups. The first group (of twenty slabs) were tested to determine the ultimate flexural strength under static loads at normal temperature. While the second group (of twenty slabs) were tested to determine the flexural behavior of slabs under static service loads at elevated temperature (using burning furnace). In this test, the samples are exposed to rising temperature reached 850℃. From these tests, the relationships between the load and  mid-span deflection as well as the relations between the  fire-time and mid-span deflection are measured. The results showed that the addition of steel fibers and fly ash particles will enhance the flexural behavior of concrete slabs. The highest increase in ultimate load compared to the reference slab was (28.31%) at the volume ratio 1.25% of the steel fibers and 25% of the fly ash at normal temperatures , And the rate of increase of the deflection with fire time was the lowest increase rate is 14.1% at the volume of 1.25% of steel fibers and the proportion of weight 20% of fly ash at high temperature. 

Use of PET Fibers in Reinforced Concrete Slabs Subjected to Flexure

2014 ◽  
Vol 634 ◽  
pp. 537-547
Author(s):  
Rosana Muñoz ◽  
Rogério Hermida Quintella ◽  
Lisa Sahadia de Oliveira Carvalho ◽  
Bárbara Ariela da Silva Leite ◽  
Roberto Brito Velame
Keyword(s):  
Reinforced Concrete ◽  
Low Cost ◽  
Flexural Behavior ◽  
Concrete Slabs ◽  
Reinforced Concrete Slabs ◽  
Structural Deterioration ◽  
Pet Fibers ◽  
Materials Used ◽  
Compressive And Flexural Strengths ◽  
Flexural Tests

The addition of fibers in order to obtain better performance of mechanical characteristics of concrete has been common place in the last fifteen years in Brazil. Following a request from the Faculty of Architecture at the Federal University of Bahia to replace the Eternit Wall panels with structural deterioration used in its mezzanine floor, this research was developed to analyze the flexural behavior of reinforced concrete slabs with the addition of PET (polyethylene terephthalate) fibers obtained from soda bottles. Selection of this material was based on sustainability since PET wastes represent a serious environmental issue although it can be recycled at a low cost. The importance of this work is based on verifying some of the characteristics of PET fibers reinforced concrete aiming sustainability of civil construction. After laboratory analysis of materials used for slabs, specimens and concrete slabs were shaped with and without PET fibers, being respectively submitted to standard axial compression and flexural tests. Despite the averages of compressive and flexural strengths of slabs with fiber being similar to those without fiber, the firsts presented a better result in terms of cracking, deformation and a less abrupt rupture.

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