scholarly journals THE RESISTANCE TO WEAR OF ARTIFICIAL LIGHT-WEIGHT AGGREGATE CONCRETE

1975 ◽  
Vol 230 (0) ◽  
pp. 11-19,109
Author(s):  
MAKOTO YOSHIOKA ◽  
HIDENORI ONO
Keyword(s):  
Artificial Light ◽  
Light Weight ◽  
Aggregate Concrete ◽  
Resistance To Wear ◽  
Light Weight Aggregate

scholarly journals PHYSICAL AND DYNAMIC PROPERTIES OF THE ARTIFICIAL LIGHT-WEIGHT AGGREGATE CONCRETE SPECIMENS EXPOSED OVER A LONG TERM

2002 ◽  
Vol 67 (561) ◽  
pp. 23-29 ◽  
Author(s):  
Takaaki OHKUBO ◽  
Takuya HASEGAWA ◽  
Hitoshi HAMASAKI ◽  
Hisashi SUGIYAMA ◽  
Katsuro KAMIMURA ◽  
...  
Keyword(s):  
Dynamic Properties ◽  
Artificial Light ◽  
Light Weight ◽  
Aggregate Concrete ◽  
Light Weight Aggregate

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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