Estimation of Damage Characterization of Hardened Concrete from Early Hydration Process

2022 ◽  
pp. 199-209
Author(s):  
Shafat Farooq ◽  
Injila Hamid ◽  
Umair Ali Wani ◽  
Shakeel A. Waseem
Keyword(s):  
Hydration Process ◽  
Hardened Concrete ◽  
Early Hydration ◽  
Damage Characterization

scholarly journals The Influence of Water Reducing Agents on Early Hydration Property of Ferrite Aluminate Cement Paste

Crystals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 731
Author(s):  
Chunlong Huang ◽  
Zirui Cheng ◽  
Jihui Zhao ◽  
Yiren Wang ◽  
Jie Pang
Keyword(s):  
Setting Time ◽  
Critical Role ◽  
Hydration Product ◽  
Reducing Agents ◽  
Reducing Agent ◽  
Hydration Process ◽  
Early Hydration ◽  
Cement Pastes ◽  
Hydration Rate ◽  
Aluminate Cement

The ferrite aluminate cement (FAC) could rapidly lose fluidity or workability due to its excessive hydration rate, and greatly reduce the construction performance. Chemical admixtures are commonly used to provide the workability of cement-based materials. In this study, to ensure required fluidity of FAC, chemically different water reducing agents are incorporated into the FAC pastes. The experiments are performed with aliphatic water reducing agent (AP), polycarboxylic acid water reducing agent (PC) and melamine water reducing agent (MA), respectively. Influence of the water reducing agents on fluidity, setting time, hydration process, hydration product and zeta potential of the fresh cement pastes is investigated. The results show that PC has a better dispersion capacity compared to AP and MA. Besides decreasing water dosage, PC also acts as a retarder, significantly increasing the setting times, delaying the hydration rate and leading to less ettringite in the hydration process of FAC particles. The water reducing agents molecules are adsorbed on the surface of positively charged minerals and hydration products, however, for PC, steric hindrance from the long side chain of PC plays a critical role in dispersing cement particles, whereas AP and MA acting through an electrostatic repulsion force.

Damage characterization of aluminum 2024 thin sheet for different stress triaxialities

2018 ◽  
Vol 18 (3) ◽  
pp. 702-712 ◽  
Author(s):  
G.H. Majzoobi ◽  
M. Kashfi ◽  
N. Bonora ◽  
G. Iannitti ◽  
A. Ruggiero ◽  
...  
Keyword(s):  
Thin Sheet ◽  
Damage Characterization

Characterization of the Initial Hydration Process of Ordinary Portland Cement Based on Low-Field NMR

2018 ◽  
Vol 50 (1-3) ◽  
pp. 187-198
Author(s):  
Jin-hua Huo ◽  
Zhi-gang Peng ◽  
Zhongbin Ye ◽  
Qian Feng ◽  
Yong Zheng ◽  
...  
Keyword(s):  
Portland Cement ◽  
Ordinary Portland Cement ◽  
Hydration Process ◽  
Low Field ◽  
Low Field Nmr

Development of an experimental model of burst fracture with damage characterization of the vertebral bodies under dynamic conditions

2017 ◽  
Vol 49 ◽  
pp. 139-144 ◽  
Author(s):  
A. Germaneau ◽  
T. Vendeuvre ◽  
M. Saget ◽  
P. Doumalin ◽  
J.C. Dupré ◽  
...  
Keyword(s):  
Experimental Model ◽  
Burst Fracture ◽  
Dynamic Conditions ◽  
Damage Characterization ◽  
Vertebral Bodies

Damage characterization of surface and sub-surface defects in stitch-bonded biaxial carbon/epoxy composites

2014 ◽  
Vol 56 ◽  
pp. 821-829 ◽  
Author(s):  
Masoud Yekani Fard ◽  
Seid Mohammadali Sadat ◽  
Brian B. Raji ◽  
Aditi Chattopadhyay
Keyword(s):  
Surface Defects ◽  
Epoxy Composites ◽  
Damage Characterization

Micro-pitting and wear damage characterization of through hardened 100Cr6 and surface induction hardened C56E2 bearing steels

Wear ◽  
2021 ◽  
pp. 204218
Author(s):  
Hadi Torkamani ◽  
Aleks Vrček ◽  
Roland Larsson ◽  
Marta-Lena Antti
Keyword(s):  
Bearing Steels ◽  
Damage Characterization ◽  
Wear Damage ◽  
Surface Induction
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