scholarly journals Effects of Adhesive Coating on the Hygrothermal Aging Performance of Pultruded CFRP Plates

Polymers ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 491
Author(s):  
Xinkai Hao ◽  
Guijun Xian ◽  
Xiangyu Huang ◽  
Meiyin Xin ◽  
Haijuan Shen
Keyword(s):  
Alkaline Solution ◽  
Fiber Reinforced Polymer ◽  
Absorption Mechanism ◽  
Reinforced Polymer ◽  
Long Term Performance ◽  
Term Performance ◽  
Positive Effect ◽  
Adhesive Coating ◽  
Temperature Water

Bonding of carbon fiber reinforced polymer (CFRP) plates to a concrete member is a widely used strengthening method. CFRP plates used in construction degrade due to harsh environmental conditions such as high temperature or alkaline solution seepage from concrete. However, the adhesive between CFRP plates and concrete may have a positive effect on the durability performance of CFRP plates. In this paper, the long-term performance of both naked and adhesive coated CFRP pultruded plates subjected to different-temperature water or alkaline solution (20, 40 and 60 °C) are investigated to evaluate the protective effect of adhesive on CFRP plates. It is found that the adhesive coating can slow the deterioration of mechanical properties especially the tensile properties and fiber-matrix interfacial properties. The water absorption mechanism of CFRP plates was also investigated.

Durability of Glass Fiber Reinforced Polymer (GFRP) Bar Used as Concrete Reinforcement: Temperature Effect

2011 ◽  
Vol 94-96 ◽  
pp. 1573-1576 ◽  
Author(s):  
Jian Wei Huang
Keyword(s):  
Service Condition ◽  
Fiber Reinforced Polymer ◽  
Average Temperature ◽  
Reinforced Polymer ◽  
Glass Fiber Reinforced ◽  
Rc Structure ◽  
Yearly Average ◽  
Long Term Performance ◽  
Term Performance

This paper presents calibration of service temperature on the prediction of long-term performance of GFRP bar in reinforced concrete structures. Two approaches, based on monthly average temperature and yearly average temperature are proposed to simulate the real service condition on the RC structure for the study on long-term performance. A design example for the comparison of results by the two approaches is presented.

An Investigation of Environmental Reduction Factor for GFRP Bar Used as Concrete Reinforcement in China

2011 ◽  
Vol 413 ◽  
pp. 399-403 ◽  
Author(s):  
Jian Wei Huang
Keyword(s):  
Reduction Factor ◽  
Fiber Reinforced Polymer ◽  
Rc Structures ◽  
Average Temperature ◽  
Reinforced Polymer ◽  
Gfrp Bar ◽  
Temperature Records ◽  
Long Term Performance ◽  
Term Performance

Currently, an environmental reduction factor (ERF) is incorporated in design codes/guidelines of Fiber Reinforced-Polymer (FRP) in reinforced concrete (RC) structures to account for the FRP long-term durability. Due to the lack of real time durability data, justification of the ERF is still necessitated. This paper presents a calibration of ERF for GFRP bar to be used in China on the basis of the prediction of GFRP long-term performance with monthly average temperature records from 32 major cities. Research results show that the ERF values vary from 0.49 to 0.58 at 100% R.H. exposure, while ERFs are greater than 0.70 for all cases being studied when R.H. is below 90%. On the basis of this study, ERF can be recommended as of 0.70 and 0.50 for application with R.H. <90% and moisture saturated exposures, respectively.

Crevice Corrosion Studies on Corrosion Resistant Alloys in Stagnant Natural Seawater

2012 ◽  
Vol 610-613 ◽  
pp. 276-279
Author(s):  
Laura L. Machuca ◽  
Stuart I. Bailey ◽  
Rolf Gubner
Keyword(s):  
Crevice Corrosion ◽  
Corrosion Potential ◽  
Natural Seawater ◽  
Corrosion Resistant ◽  
Testing Procedures ◽  
Corrosion Studies ◽  
Long Term Performance ◽  
Term Performance ◽  
Positive Effect

Crevice corrosion (CC) was investigated for a number of selected corrosion resistant alloys in natural seawater containing microorganisms for up to 18 months under stagnant conditions. Experimental controls consisted of tests in natural seawater filtered in accordance with hydrostatic testing procedures. The corrosion potential of alloys was monitored throughout exposure and corrosion was evaluated by weight loss and 3D optical microscopy. CC was initiated on several alloys and corrosion rates in time indicated a positive effect of seawater filtration on the long-term performance of the alloys. Microbial adhesion, as indicated by fluorescence microscopy, occurred mainly outside the crevice and differed according to the nature of the substratum surface.

scholarly journals PENGARUH TANGGUNG JAWAB SOSIAL PERUSAHAAN TERHADAP KINERJA PERUSAHAAN PERBANKAN

2019 ◽  
Vol 11 (1) ◽  
pp. 15
Author(s):  
Heni Swastika ◽  
Titik Aryati
Keyword(s):  
Hypothesis Test ◽  
Total Sample ◽  
Short Term ◽  
Asset Turnover ◽  
Corporate Social ◽  
Long Term Performance ◽  
Term Performance ◽  
A Company ◽  
Positive Effect

<p class="Style1"><em>This Thesis is done in order to give empirical prove about Corporate Social </em><em>Responsibily (CSR) related to Company Financial Performance (productivity and value </em><em>of a company). In this Thesis, company's performance devided in short term </em><em>performance and long term performance. Company's short term performance is company's productivy based on Asset Turnover (ATO), while Company's long term </em><em>pe</em><em>4</em><em>formance </em><em>is company's value </em><em>based on Price to Book Value (PBV). Corporate Social Reponsibility (CSR) performance is measured with Sustainability Report Disclosure Index (SRDI). Population used in this thesis is the company that have been registered in Bursa Efek Indonesia (BEI) in a certain period between 2012 until 2014. Total sample for this Thesis are 31 Banking company which is chosen using purposive sampling method. The data for this thesis is analyzed using classical assumption test and hypothesis test using Doubled Linear Regression. This research proves that Corporate Social Responsibility (CSR) brings positive effect related to Productivity of a Company and Value of a Company.</em></p>

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