scholarly journals Structural Performance of Polymer Fiber Reinforced Engineered Cementitious Composites Subjected to Static and Fatigue Flexural Loading

Polymers ◽  
2015 ◽  
Vol 7 (7) ◽  
pp. 1299-1330 ◽  
Author(s):  
Mohamed Sherir ◽  
Khandaker Hossain ◽  
Mohamed Lachemi
Keyword(s):  
Structural Performance ◽  
Cementitious Composites ◽  
Polymer Fiber ◽  
Fiber Reinforced ◽  
Engineered Cementitious Composites ◽  
Flexural Loading

scholarly journals Structural Performance of Polymer Fiber Reinforced Engineered Cementitious Composites Subjected to Static and Fatigue Flexural Loading

2021 ◽  
Author(s):  
Mohamed A. A. Sherir ◽  
Khandaker M. A. Hossain ◽  
Mohamed Lachemi
Keyword(s):  
Fly Ash ◽  
Strain Hardening ◽  
Fatigue Loading ◽  
Fiber Reinforced Concrete ◽  
Silica Sand ◽  
Cementitious Composites ◽  
Polymer Fiber ◽  
Fiber Reinforced ◽  
Engineered Cementitious Composites ◽  
Cracking Behavior

This paper presents the influence of silica sand, local crushed sand and different supplementary cementing materials (SCMs) to Portland cement (C) ratio (SCM/C) on the flexural fatigue performance of engineered cementitious composites (ECCs). ECC is a micromechanically-based designed high-performance polymer fiber reinforced concrete with high ductility which exhibits strain-hardening and micro-cracking behavior in tension and flexure. The relative high cost remains an obstacle for wider commercial use of ECC. The replacement of cement by SCMs, and the use of local sand aggregates can lower cost and enhance greenness of the ECC. The main variables of this study were: type and size of aggregates (local crushed or standard silica sand), type of SCMs (fly ash “FA” or slag), SCM/cement ratio of 1.2 or 2.2, three fatigue stress levels and number of fatigue cycles up to 1 million. The study showed that ECC mixtures produced with crushed sand (with high volume of fly ash and slag) exhibited strain hardening behavior (under static loading) with deformation capacities comparable with those made with silica sand. Class F-fly ash combined with crushed sand was the best choice (compared to class CI fly ash and slag) in order to enhance the ECC ductility with slag–ECC mixtures producing lowest deflection capacity. FA–ECC mixtures with silica sand developed more damage under fatigue loading due to higher deflection evolution than FA–ECC mixtures with crushed sand.

scholarly journals Structural Performance of Polymer Fiber Reinforced Engineered Cementitious Composites Subjected to Static and Fatigue Flexural Loading

2021 ◽  
Author(s):  
Mohamed A. A. Sherir ◽  
Khandaker M. A. Hossain ◽  
Mohamed Lachemi
Keyword(s):  
Fly Ash ◽  
Strain Hardening ◽  
Fatigue Loading ◽  
Fiber Reinforced Concrete ◽  
Silica Sand ◽  
Cementitious Composites ◽  
Polymer Fiber ◽  
Fiber Reinforced ◽  
Engineered Cementitious Composites ◽  
Cracking Behavior

This paper presents the influence of silica sand, local crushed sand and different supplementary cementing materials (SCMs) to Portland cement (C) ratio (SCM/C) on the flexural fatigue performance of engineered cementitious composites (ECCs). ECC is a micromechanically-based designed high-performance polymer fiber reinforced concrete with high ductility which exhibits strain-hardening and micro-cracking behavior in tension and flexure. The relative high cost remains an obstacle for wider commercial use of ECC. The replacement of cement by SCMs, and the use of local sand aggregates can lower cost and enhance greenness of the ECC. The main variables of this study were: type and size of aggregates (local crushed or standard silica sand), type of SCMs (fly ash “FA” or slag), SCM/cement ratio of 1.2 or 2.2, three fatigue stress levels and number of fatigue cycles up to 1 million. The study showed that ECC mixtures produced with crushed sand (with high volume of fly ash and slag) exhibited strain hardening behavior (under static loading) with deformation capacities comparable with those made with silica sand. Class F-fly ash combined with crushed sand was the best choice (compared to class CI fly ash and slag) in order to enhance the ECC ductility with slag–ECC mixtures producing lowest deflection capacity. FA–ECC mixtures with silica sand developed more damage under fatigue loading due to higher deflection evolution than FA–ECC mixtures with crushed sand.

scholarly journals Effect of curing age on the self-sensing behavior of carbon-based engineered cementitious composites (ECC) under monotonic flexural loading scenario

2018 ◽  
Vol 162 ◽  
pp. 01034
Author(s):  
Ali Majeed Al-Dahawi
Keyword(s):  
Carbon Fibers ◽  
The Self ◽  
Cementitious Composites ◽  
Conductive Network ◽  
Engineered Cementitious Composites ◽  
Electrically Conductive ◽  
Conductive Material ◽  
Flexural Loading ◽  
Curing Age ◽  
Carbon Based

The potential effects of curing age on the self-sensing (piezoresistivity) capability of carbon-based Engineered Cementitious Composites (ECC) specimens are under focus in the present study. This non-structural feature can be regarded as one of the best solutions for continuously monitoring of infrastructures in terms of damage and deformations. Carbon fibers which are a micro-scale electrically conductive material were added to the ECC matrix and well dispersed to create the electrically conductive network. This network is responsible for sensing the applied loads on the prismatic specimens. The self-sensing behavior of electrically conductive prismatic specimens under four-point monotonic flexural loading was investigated and compared with dielectric ECC specimens at four ages of curing (7, 28, 90 and 180 days). The results showed that the developed multifunctional cementitious composites can sense the changes in the applied flexural stresses and the resultant mid-span deflection along the adopted curing ages with an improvement in the later ages.

scholarly journals Effect of Sustained Flexural Loading on Self-Healing of Engineered Cementitious Composites

2013 ◽  
Vol 11 (5) ◽  
pp. 167-179 ◽  
Author(s):  
Erdogan Özbay ◽  
Mustafa Sahmaran ◽  
Hasan E. Yücel ◽  
Tahir K. Erdem ◽  
Mohamed Lachemi ◽  
...  
Keyword(s):  
Cementitious Composites ◽  
Self Healing ◽  
Engineered Cementitious Composites ◽  
Flexural Loading

Bond Characteristics between ECC (Engineered Cementitious Composites) and GFRP Rebars

2012 ◽  
Vol 602-604 ◽  
pp. 1010-1013
Author(s):  
Yun Cheol Choi
Keyword(s):  
Fiber Reinforced Concrete ◽  
Fiber Reinforced Polymers ◽  
Cementitious Composites ◽  
Fiber Reinforced ◽  
Engineered Cementitious Composites ◽  
Bond Slip ◽  
Glass Fiber Reinforced ◽  
Concrete Type ◽  
Gfrp Rebars ◽  
Bond Characteristics

The purpose of this study is to investigate the bond characteristics between ECC(Engineered Cementitious Composites) and GFRP(Glass Fiber Reinforced Polymers) rebars. An experimental study was carried out to investigate the bond-slip properties of the steel and GFRP rebars in ECC which was reinforced with Polyvinyl Alcohol(PVA) fibers. A total of 8 beam specimens, which was designed according to the RILEM guidelines, was tested according to the RILEM guideline. The main objective was evaluating the load versus displacement and load versus slip behavior and the bond strength regarding the influence of the following parameters : concrete type(Normal concrete and fiber reinforced concrete) and bar diameter and type. From the test results, concrete and ECC specimen presented similar behavior for steel reinforced specimen. However, GFRPO reinforced specimen show different behavior with that. Comparative study for test and equations of MC90 was carried out and code provision predicted the bond characteristics conservatively.

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