Experimental and Analytical Study on Channel Shear Connectors in Light Weight Aggregate Concrete

2010 ◽  
Author(s):  
Mahdi Shariati ◽  
Ramli-Sulong N. H. ◽  
Shervin Maleki ◽  
Arabnejad.KH M. M.
Keyword(s):  
Analytical Study ◽  
Light Weight ◽  
Aggregate Concrete ◽  
Shear Connectors ◽  
Light Weight Aggregate

Behavior of Channel Shear Connectors in Normal and Light Weight Aggregate Concrete (Experimental and Analytical Study)

2010 ◽  
Vol 168-170 ◽  
pp. 2303-2307 ◽  
Author(s):  
Mahdi Shariati ◽  
Nor Hafizah Ramli Sulong ◽  
Hamid Sinaei ◽  
Mohammad Mehdi Arabnejad Khanouki ◽  
Payam Shafigh
Keyword(s):  
Analytical Study ◽  
Element Model ◽  
Shear Capacity ◽  
Light Weight ◽  
Aggregate Concrete ◽  
Shear Connectors ◽  
The University ◽  
Nonlinear Finite Element Model ◽  
Light Weight Aggregate ◽  
Push Out

This paper describes five push-out tests carried out at the University of Malaya using channel shear connector. The tests study experimentally and analytically, the behavior of channel shear connectors embedded in normal and light weight aggregate concrete (LWAC). Limited push-out tests are used to measure the accuracy of a proposed nonlinear finite element model for typical push-out test specimens. Using this model, an extensive parametric study performed to arrive at prediction for shear capacity of channel connectors in LWAC. An equation is suggested for the shear capacity of these connectors in LWAC.

scholarly journals Reinforcing Mechanisms of Coir Fibers in Light-Weight Aggregate Concrete

Materials ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 699
Author(s):  
Xiaoxiao Zhang ◽  
Leo Pel ◽  
Florent Gauvin ◽  
David Smeulders
Keyword(s):  
Cement Hydration ◽  
Natural Fibers ◽  
Autogenous Shrinkage ◽  
Drying Shrinkage ◽  
Hydration Reaction ◽  
Light Weight ◽  
Limited Information ◽  
Aggregate Concrete ◽  
Coir Fibers ◽  
Light Weight Aggregate

Due to the requirement for developing more sustainable constructions, natural fibers from agricultural wastes, such as coir fibers, have been increasingly used as an alternative in concrete composites. However, the influence of coir fibers on the hydration and shrinkage of cement-based materials is not clear. In addition, limited information about the reinforcing mechanisms of coir fibers in concrete can be found. The goal of this research is to investigate the effects of coir fibers on the hydration reaction, microstructure, shrinkages, and mechanical properties of cement-based light-weight aggregate concrete (LWAC). Treatments on coir fibers, namely Ca(OH)2 and nano-silica impregnation, are applied to further improve LWAC. Results show that leachates from fibers acting as a delayed accelerator promote cement hydration, and entrained water by fibers facilitates cement hydration during the whole process. The drying shrinkage of LWAC is increased by adding fibers, while the autogenous shrinkage decreases. The strength and toughness of LWAC are enhanced with fibers. Finally, three reinforcement mechanisms of coir fibers in cement composites are discussed.

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