Service Life Prediction for the Neoprene Used in Seawater

2013 ◽  
Vol 739 ◽  
pp. 85-89
Author(s):  
Qing Zhen Wen ◽  
Chao Yu ◽  
Jin Hua Zhu
Keyword(s):  
Service Life ◽  
Aging Time ◽  
Life Prediction ◽  
Sea Water ◽  
Accelerated Aging ◽  
Service Life Prediction ◽  
Exponential Form ◽  
Prediction Functions

The heat seawater method was designed and the accelerated aging tests of the neoprene were carried in laboratory. The toughness and strength of the neoprene in aging time was investigated. The rule of toughness and strength and aging time was studied. The service life prediction functions of the neoprene were established and service life at 25°C was estimated based on the index of toughness and strength. It is concluded that toughness and strength of the neoprene decreases in exponential form with aging time, and the service life of the neoprene used in sea water at 25°C is 29.5 years.

Service Life Prediction for the Neoprene Based on Tearing Strength

2011 ◽  
Vol 328-330 ◽  
pp. 1090-1093 ◽  
Author(s):  
Chao Yu ◽  
Qing Zhen Wen ◽  
Jin Hua Zhu ◽  
Zheng Wei
Keyword(s):  
Service Life ◽  
Aging Time ◽  
Life Prediction ◽  
Sea Water ◽  
Accelerated Aging ◽  
Service Life Prediction ◽  
Exponential Form ◽  
Prediction Function ◽  
Gradual Process ◽  
Tearing Strength

The degradation of neoprene often occurs as a slow and gradual process and it is cannot be used abruptly. In order to keep the safety of equipments and people, it is important to consider the development of such process to correctly estimate its service life. The heat seawater method was designed and the accelerated aging tests of the neoprene were carried in laboratory. The tearing strength of the neoprene in aging time was investigated. The rule of tearing strength and aging time was studied. The service life prediction function of the neoprene was established and service life at 25°C was estimated based on the index of tearing strength. The result shows that tearing strength of the neoprene decreases in exponential form with aging time, and the service life of the neoprene used in sea water at 25°C is 29.79 years.

Service Life Prediction of Reactive Powder Concrete due to Seawater Infiltration

2012 ◽  
Vol 535-537 ◽  
pp. 1785-1789
Author(s):  
Xin Wei Ma ◽  
Yu Yan Ji
Keyword(s):  
Service Life ◽  
Life Prediction ◽  
Sea Water ◽  
Energy Dispersive Spectrometer ◽  
Chloride Ion ◽  
Service Life Prediction ◽  
Reactive Powder Concrete ◽  
Ion Diffusion ◽  
Marine Engineering ◽  
Reactive Powder

Reactive powder concrete (RPC) has a higher strengths, as well as excellent durability and corrosion resistance. So, it is expected to be increasingly used in marine engineering. In this study, After the RPC samples had been subjected to gradually increased high-pressure seawater for 30 days, the chloride contents in the samples along with the infiltration direction were calibrated on an energy dispersive spectrometer. On the basis of second Fick’s law, the chloride ion diffusion model and service life prediction model of reactive powder concrete in sea water are established. The service life of an actual reactive powder concrete structure could be predicted.

scholarly journals Critical Review of Polymeric Building Envelope Materials: Degradation, Durability and Service Life Prediction

Buildings ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 299
Author(s):  
Marzieh Riahinezhad ◽  
Madeleine Hallman ◽  
J-F. Masson
Keyword(s):  
Climate Change ◽  
Service Life ◽  
Critical Review ◽  
Life Prediction ◽  
Building Envelope ◽  
Service Life Prediction ◽  
Degradation Mechanisms ◽  
Material Component ◽  
Aging Conditions ◽  
Environmentally Sound

This paper provides a critical review of the degradation, durability and service life prediction (SLP) of polymeric building envelope materials (BEMs), namely, claddings, air/vapour barriers, insulations, sealants, gaskets and fenestration. The rate of material deterioration and properties determine the usefulness of a product; therefore, knowledge of the significant degradation mechanisms in play for BEMs is key to the design of proper SLP methods. SLP seeks to estimate the life expectancy of a material/component exposed to in-service conditions. This topic is especially important with respect to the potential impacts of climate change. The surrounding environment of a building dictates the degradation mechanisms in play, and as climate change progresses, material aging conditions become more unpredictable. This can result in unexpected changes and/or damages to BEMs, and shorter than expected SL. The development of more comprehensive SLP methods is economically and environmentally sound, and it will provide more confidence, comfort and safety to all building users. The goal of this paper is to review the existing literature in order to identify the knowledge gaps and provide suggestions to address these gaps in light of the rapidly evolving climate.

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