scholarly journals Retrofitting of Column by Concrete Jacketing

2021 ◽  
Vol 9 (VII) ◽  
pp. 1374-1381
Author(s):  
Rushikesh Rodge
Keyword(s):  
Shear Strength ◽  
Experimental Research ◽  
Coarse Aggregate ◽  
Seismic Resistance ◽  
Natural Light ◽  
Total Replacement

This study has been conducted through basic experimental research in order to analyze retrofitting of the structure is better alternative instead of total replacement of structure. It may even be economical to use Concrete Jacketing for damaged column While Replacing Coarse Aggregate With Broken Glass in Concrete Jacketing. It improves axial and shear strength of column and major strengthening of foundation may avoided. So to study Retrofitting Of RC Square Column By Concrete Jacket Made By Replacing Aggregate With Broken Glass which helps to increase the seismic resistance of a building in both orthogonal directions of a structure and advantages ventilation and natural light.

scholarly journals Influence of coarse aggregate on shear resistance of self-consolidating concrete beams

2017 ◽  
Vol 10 (1) ◽  
pp. 30-40
Author(s):  
G. SAVARIS ◽  
R. C. A. PINTO
Keyword(s):  
Shear Strength ◽  
Failure Modes ◽  
Coarse Aggregate ◽  
Concrete Beams ◽  
Shear Resistance ◽  
Self Consolidating Concrete ◽  
Coarse Aggregates ◽  
Lower Shear ◽  
Nominal Size ◽  
High Flowability

Abstract Self-consolidating concrete is characterized by its high flowability, which can be achieved with the addition of superplasticizer and the reduction of the amount and size of coarse aggregates in the concrete mix. This high flowability allows the concrete to properly fill the formwork without any mechanical vibration. The reduction in volume and particle size of the coarse aggregates may result in lower shear strength of beams due to a reduced aggregate interlock. Therefore, an experimental investigation was conducted to evaluate the influence of the reduction in the volume fraction and the nominal size of coarse aggregate on concrete shear strength of self-consolidating beams. Six concrete mixes were produced, four self-consolidating and two conventionally vibrated. A total of 18 beams, with flexural reinforcement but without shear reinforcement were cast. These beams were tested under a four-point loading condition. Their failure modes, cracking patterns and shear resistances were evaluated. The obtained shear resistances were compared to the theoretical values given by the ACI-318 and EC-2 codes. The results demonstrated a lower shear resistance of self-consolidating concrete beams, caused mainly due to the reduced aggregate size.

scholarly journals Experimental Investigation on the Shear Behaviour of Stud-Bolt Connectors of Steel-Concrete-Steel Fibre-Reinforced Recycled Aggregates Sandwich Panels

Materials ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5185
Author(s):  
Arash Karimipour ◽  
Mansour Ghalehnovi ◽  
Mohammad Golmohammadi ◽  
Jorge de Brito
Keyword(s):  
Shear Strength ◽  
Coarse Aggregate ◽  
Sandwich Panels ◽  
High Strength ◽  
Steel Plates ◽  
Recycled Aggregates ◽  
Shear Behaviour ◽  
Concrete Core ◽  
Steel Fibres ◽  
Normal Strength

Steel-concrete-steel (SCS) sandwich panels are manufactured with two thin high-strength steel plates and a moderately low-density and low-strength thick concrete core. In this study, 24 specimens were produced and tested. In these specimens, a new stud-bolt connector was used to regulate its shear behaviour in sandwich panels. The bolts’ diameter, concrete core’s thickness and bolts’ spacing were the parameters under analysis. Furthermore, the concrete core was manufactured with normal-strength concrete and steel fibres concrete (SFC). Steel fibres were added at 1% by volume. In addition, the recycled coarse aggregate was used at 100% in terms of mass instead of natural coarse aggregate. Therefore, the ultimate bearing capability and slip of the sandwich panels were recorded, and the failure mode and ductility index of the specimens were evaluated. A new formula was also established to determine the shear strength of SCS panels with this kind of connectors. According to this study, increasing the diameter of the stud-bolts or using SFC in sandwich panels improve their shear strength and ductility ratio.

scholarly journals EXPERIMENTAL INVESTIGATION ON LWC WITH COMPLETE REPLACEMENT OF COURSE AGGREGATE BY EPS BEADS

2020 ◽  
Vol 14 (1) ◽  
Author(s):  
Natalija Bede ◽  
Neira Torić Malić
Keyword(s):  
Experimental Investigation ◽  
Coarse Aggregate ◽  
Lightweight Concrete ◽  
Expanded Polystyrene ◽  
Hardened Concrete ◽  
Test Results ◽  
Mixture Proportioning ◽  
Complete Replacement ◽  
Total Replacement ◽  
Mix Proportion

In this paper, expanded polystyrene (EPS) lightweight concrete (LWC) was investigated. The mainaim was to design EPS LWC with the specified density of 1200 kg/m3 according to standard concretemix proportion. Mix proportion included total replacement of the conventional coarse aggregate bymaximum possible amount of EPS beads, which ensures concrete workability and prescribeddensity. The results demonstrated that exactly defined mixture-proportioning and casting procedureare required to achieve designed density. For designed EPS LWC mixture properties of freshlymixedconcrete and hardened concrete were analyzed. Based on test results it is concluded thatdesigned EPS LWC can be used for structural-insulating purpose such as floors and roofs.

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