Analysis of Pore Characteristics on the Porous Body-Porosity Index of Ic and Is in Light Weight Aggregate

2004 ◽  
Vol 41 (2) ◽  
pp. 176-181 ◽  
Keyword(s):  
Porous Body ◽  
Light Weight ◽  
Pore Characteristics ◽  
Light Weight Aggregate ◽  
Porosity Index

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.

Quality assessment of light weight aggregate

1994 ◽  
Vol 24 (8) ◽  
pp. 1423-1427 ◽  
Author(s):  
A. Ulrik Nilsen ◽  
Paulo J.M. Monteiro ◽  
Odd E. Gjørv
Keyword(s):  
Quality Assessment ◽  
Light Weight ◽  
Light Weight Aggregate

scholarly journals Use the Polymer Concrete as a Substitute for Ordinary Concrete by Improving of Acoustic and Thermal Insulation With Suitable Cost

2017 ◽  
Vol 1 (2) ◽  
pp. 650-661
Author(s):  
Amer M. Ibrahim ◽  
Ali Adwan Hmood ◽  
Noor Al Huda H. Ahmed
Keyword(s):  
Thermal Conductivity ◽  
Compression Strength ◽  
Chemical Interaction ◽  
Economic Feasibility ◽  
Polymer Concrete ◽  
Light Weight ◽  
Novolac Resin ◽  
Ordinary Concrete ◽  
Acoustic Insulation ◽  
Light Weight Aggregate

The purpose of this study is to examine the effect of adding novolac resin by different volumetric percentages to concert as a light weight aggregate In addition to the economic feasibility of the use of these concrete in the field of build and construction .they investigated tht the compression strength, thermal conductivity, acoustic insulation and densities. The results showed ultimate compression strength and acoustic insulation by melting novolac and added to the cement and sand as a polymer concrete in the hot state (by melting novoac >90c).However added novolac resin as aggregate in the cold state to the concrete increase thermal conductivity and increasing compression strength and acoustic insulation .This results gained by chemical interaction of novolac and cement.  

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