Effects of Long-Term Exposure to Ultrahigh Temperature on the Mechanical Parameters of Cement

2006 ◽  
Author(s):  
David Stiles
Keyword(s):  
Mechanical Parameters ◽  
Ultrahigh Temperature

A Compliant Biological Vascular Prosthesis

1993 ◽  
Vol 16 (3) ◽  
pp. 141-145 ◽  
Author(s):  
R. Tu ◽  
E. Wang ◽  
C. Hata ◽  
S.H. Shen ◽  
D. Lin ◽  
...  
Keyword(s):  
Animal Study ◽  
Applied Pressure ◽  
Tensile Modulus ◽  
Vascular Prosthesis ◽  
Mechanical Parameters ◽  
Fractional Change ◽  
Micro Structure ◽  
Processing Methods ◽  
Biological Prosthesis

One requirement of the mechanical parameters for an acceptable vascular prosthesis is compliance. The compliance of a vascular prosthesis is defined as the fractional change in luminal volume per unit change in applied pressure. A compliant prosthesis has been correlated to prosthesis patency and long-term efficacy in an animal study. However, there have been very few reports on how to manufacture a compliant prosthesis. It is the objective of this study to research the processing methods to manufacture a reasonably compliant vascular prosthesis. A new fixative, polyepoxy compound, was used to fix an artery. The arteries were fixed under different degrees of longitudinal retraction. By locking in the collagen micro-structure at an overly relaxed state and then crosslinking said collagen, the resulting biological prosthesis exhibited extreme compliance and pliability. A prosthesis matching its arterial origin in tensile modulus was achieved by crosslinking an artery at its 45% retraction longitudinally. This flexible prosthesis showed a volumetric compliance index of 18.4 ± 0.9 %Δ/100 mmHg and a longitudinal tensile modulus of 942 grams/cm2. Our current study indicated that a prosthesis fixed with polyepoxy compounds has shown more pliability than that with glutaraldehyde. Further animal study to correlate prostheses patency to different degrees of compliance is needed to confirm this proposed manufacturing approach.

Chemical and Proteolysis-Derived Changes during Long-Term Storage of Lactose-Hydrolyzed Ultrahigh-Temperature (UHT) Milk

2014 ◽  
Vol 62 (46) ◽  
pp. 11270-11278 ◽  
Author(s):  
Therese Jansson ◽  
Hanne B. Jensen ◽  
Ulrik K. Sundekilde ◽  
Morten R. Clausen ◽  
Nina Eggers ◽  
...  
Keyword(s):  
Uht Milk ◽  
Long Term Storage ◽  
Ultrahigh Temperature ◽  
Term Storage

scholarly journals The Effect of Incorporating Industrial Wastewater on Durability and Long Term Strength of Concrete

2021 ◽  
Author(s):  
Ehsan Nasseralshariati ◽  
Danial Mohammadzadeh ◽  
Nader Karballaeezadeh ◽  
Amir Mosavi
Keyword(s):  
Industrial Wastewater ◽  
Construction Materials ◽  
Rapid Freezing ◽  
Mechanical Parameters ◽  
Term Strength ◽  
Half Cell ◽  
Cell Potential ◽  
Gray Water ◽  
Concrete Production

Concrete, as one of the essential construction materials is responsible for a vast amount of emissions. Using recycled materials and gray water can considerably contribute to the sustaina-bility aspect of concrete production. Thus, finding a proper replacement for fresh water, in the production of concrete, is significant. The usage of industrial wastewater, instead of water in the concrete can be considered in this paper. In this study, 450 concrete samples are produced with different amounts of wastewater. The mechanical parameters such as slump, compressive strength, water absorption, tensile strength, electrical resistivity, rapid freezing, half-cell potential, and appearance are investigated. The results showed that the usage of industrial wastewater does not significantly change the main characteristics of concrete. Although, increasing the concentration of the wastewater can decrease durability and strength features nonlinearly.

scholarly journals The Effect of Incorporating Industrial Wastewater on Durability and Long Term Strength of Concrete

2021 ◽  
Author(s):  
Ehsan Nasseralshariati ◽  
Danial Mohammadzadeh ◽  
Nader Karballaeezadeh ◽  
Amir Mosavi
Keyword(s):  
Industrial Wastewater ◽  
Construction Materials ◽  
Rapid Freezing ◽  
Mechanical Parameters ◽  
Term Strength ◽  
Half Cell ◽  
Cell Potential ◽  
Gray Water ◽  
Concrete Production

Concrete, as one of the essential construction materials, is responsible for a vast amount of emissions. Using recycled materials and gray water can considerably contribute to the sustainability aspect of concrete production. Thus, finding a proper replacement for fresh water, in the production of concrete, is significant. The usage of industrial wastewater, instead of water in the concrete can be considered in this paper. In this study, 450 concrete samples are produced with different amounts of wastewater. The mechanical parameters such as slump, compressive strength, water absorption, tensile strength, electrical resistivity, rapid freezing, half-cell potential, and appearance are investigated. The results showed that the usage of industrial wastewater does not significantly change the main characteristics of concrete. Although, increasing the concentration of the wastewater can decrease durability and strength features nonlinearly.

scholarly journals The Effect of Incorporating Industrials Wastewater on Durability and Long Term Strength of Concrete

2021 ◽  
Author(s):  
Ehsan Nasseralshariati ◽  
Danial Mohammadzadeh S. ◽  
Nader Karballaeezadeh ◽  
Amir Mosavi
Keyword(s):  
Industrial Wastewater ◽  
Construction Materials ◽  
Rapid Freezing ◽  
Mechanical Parameters ◽  
Term Strength ◽  
Half Cell ◽  
Cell Potential ◽  
Gray Water ◽  
Concrete Production

Concrete, as one of the essential construction materials is responsible for a vast amount of emissions. Using recycled materials and gray water can considerably contribute to the sustainability aspect of concrete production. Thus, finding a proper replacement for fresh water, in the production of concrete, is significant. The usage of industrial wastewater, instead of water in the concrete can is considered in this paper. In this study, 450 concrete samples are produced with different amounts of wastewater. The mechanical parameters such as slump, compressive strength, water absorption, tensile strength, electrical resistivity, rapid freezing, half-cell potential, and appearance are investigated. The results showed that the usage of industrial wastewater does not significantly change the main characteristics of concrete. Although, increasing the concentration of the wastewater can decrease durability and strength features nonlinearly.

scholarly journals Mechanical Parameter Identification of Hydraulic Engineering with the Improved Deep Q-Network Algorithm

2020 ◽  
Vol 2020 ◽  
pp. 1-20
Author(s):  
Wei Ji ◽  
Xiaoqing Liu ◽  
Huijun Qi ◽  
Xunnan Liu ◽  
Chaoning Lin ◽  
...  
Keyword(s):  
Neural Network ◽  
Environmental Factors ◽  
Surrogate Model ◽  
Deep Neural Network ◽  
Hydraulic Structures ◽  
Mechanical Parameters ◽  
Operating Period ◽  
Accurate Analysis ◽  
Inversion Analysis

During the long-term operating period, the mechanical parameters of hydraulic structures and foundation deteriorated gradually because of the environmental factors. In order to evaluate the overall safety and durability, these parameters should be calculated by some accurate analysis methods, which are hindered by slow computational efficiency and optimization performance. The improved deep Q-network (DQN) algorithm combined with the deep neural network (DNN) surrogate model was proposed in this paper to ameliorate the above problems. Through the study cases of different zoning in the dam body and the actual engineering foundation, it is shown that the improved DQN algorithm has a good application effect on inversion analysis of material mechanical parameters in this paper.

A long-term ultrahigh temperature application of layered silicide coated Nb alloy in air

2018 ◽  
Vol 439 ◽  
pp. 1111-1118 ◽  
Author(s):  
Jia Sun ◽  
Qian-Gang Fu ◽  
Tao Li ◽  
Chen Wang ◽  
Cai-Xia Huo ◽  
...  
Keyword(s):  
Temperature Application ◽  
Ultrahigh Temperature
Sign in / Sign up

Export Citation Format

Share Document