Mechanical and fiber/matrix interface behavior of ultra-high-strength and high-ductility cementitious composites incorporating waste glass powder

Author(s):  
Jian-Dong Wu ◽  
Li-Ping Guo ◽  
Yuan-Zhang Cao ◽  
Bang-Cheng Lyu
2006 ◽  
Vol 45 ◽  
pp. 1435-1443 ◽  
Author(s):  
Dietmar Koch ◽  
Kamen Tushtev ◽  
Jürgen Horvath ◽  
Ralf Knoche ◽  
Georg Grathwohl

The mechanical properties of ceramic matrix composites (CMC) depend on the individual properties of fibers and matrix, the fiber-matrix interface, the microstructure and the orientation of the fibers. The fiber-matrix interface of ceramics with stiff matrices (e.g. CVI-derived SiC/SiC) must be weak enough to allow crack deflection and debonding in order to achieve excellent strength and strain to failure (weak interface composites WIC). This micromechanical behavior has been intensively investigated during the last 20 years. With the development of CMC with weak matrices (weak matrix composites WMC) as e.g. oxide/oxide composites or polymer derived CMC the mechanical response can not be explained anymore by these models as other microstructural mechanisms occur. If the fibers are oriented in loading direction in a tensile test the WMC behave almost linear elastic up to failure and show a high strength. Under shear mode or if the fibers are oriented off axis a significant quasiplastic stress-strain behavior occurs with high strain to failure and low strength. This complex mechanical behavior of WMC will be explained using a finite element (FE) approach. The micromechanical as well as the FE models will be validated and attributed to the different manufacturing routes.


1995 ◽  
pp. 2563-2568
Author(s):  
G. Frantziskonis ◽  
Theodore E. Matikas ◽  
Prasanna Karpur ◽  
S. Krishnamurthy ◽  
Leon Shaw

2017 ◽  
Vol 28 (1) ◽  
pp. 215-222 ◽  
Author(s):  
Mostafa Vafaei ◽  
Ali Allahverdi

Author(s):  
Byung-Chul Kim ◽  
Tae-Gweon Cha ◽  
Pan-Ki Jang ◽  
Chan-Woo Kim ◽  
Il-Young Jang

2018 ◽  
Vol 7 (4) ◽  
pp. 236
Author(s):  
James H. Haido ◽  
Youkhanna Z. Dinkha ◽  
Badorul H. Abu-Bakar

Manufactured reactive powders, as a silica fume, are usually used in production of high strength concrete with for retrofitting purposes of concrete structures. The efficiency of inert waste glass powder in hybrid concrete fabrication has not been widely investigated, thus further studies are essentially considered in this area. In the present study, hybrid concrete prisms with size of 10x10x30 cm have been made with old ordinary concrete (OC) and new high strength concrete (HSC). High strength of new concrete part of these prisms is achieved via using of waste glass powder, silica fume and mixture of them. The roughness of interfacial surface between old and new parts of hybrid concrete is improved in various manners with utilizing sand blast, holes and grooves. Performance of these elements has been measured in terms of slant shear strength and mode of failure. The results have been shown that there is a relatively similar strength with using retrofitted concrete made with the used powder which includes silica fume, glass powders, and their mixture, the mixture of both powders, namely, silica fume and waste glass powders is regarded a best choice in the present stud. It is demonstrated also that the grooved interface between old and new concretes induces proper strength equivalent to 89% of control concrete prisms strength.


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