Studies of the Ageing Behaviour of Gun-grade Building Joint Sealants –the State of the Art
نویسنده
چکیده
Abstract In the mid-1970s the first studies, in the form of inspections of building joints, were conducted in England and Germany into the failure rate of sealants. As a consequence of these studies, the ageing behaviour of sealants was investigated with the aid of artificial accelerated ageing methods and by storing sealants outdoors for several years in moderate or tropical climates. The results acquired with these ageing methods can only be interpreted on the basis of a comprehensive understanding of the environmental factors responsible for ageing and the synergy of such factors. In this context, particular attention must be paid to the cyclic mechanical strain upon sealants which occurs in a building joint due to expansion, compression and shearing. By comparing the results acquired using different ageing methods, it is possible to demonstrate the short-comings of the accelerated ageing methods currently in use and to submit recommendations for the future development of standardised methods.
منابع مشابه
Application of Near Surface Mounted (NSM) technique for Seismic Retrofitting of Heritage Buildings
The high vulnerability of the cultural buildings due to seismic actions urged researchers to retrofit them using reversible and compatible techniques. The application of fiber reinforced polymer (FRP) for enhancing the structural behavior of masonry buildings, under seismic actions, has been studied by many researchers. The near-surface mounting (NSM) technique is a relatively new retrofitting ...
متن کاملLate Antiquity and Early Islam
In this paper, an investigation on the relation between state-building and Near Eastern religion is attempted. Analyzing the city-state of Ḥaṭrā (Iraq, close to Kirkuk), it is demonstrated that pre-Islamic state craft in the region was dependent on the initiative of the Parthian monarchy in Iran. The kings of the Arsacid dynasty attempted to bestow the local Arabic tribes in the Jazira with a c...
متن کاملComparative Analysis of Baroque and Rococo in Interior Decoration of the Masudieh Complex & Qavam Al-Saltaneh Building
متن کامل
EFFECT OF SCANDIUM ON THE GRAIN REFINING AND AGEING BEHAVIOUR OFCASTAl-Si-MgALLOY
Microstructure and properties of the Al-6Si-0.3Mg alloys containing scandium (0.2 to 0.6wt %) were investigated. The microstructure was observed by optical microscopy, the hardness was determined by Vickers tester and phase transformation was investigated by differential scanning calorimetry (DSC) technique. The results showed that scandium can refine dendrites, enhance hardness in the aged all...
متن کاملPerformance of a Two-stages Gas Gun: Experimental, Analytical and Numerical Analysis
Two stages gas guns are used for various purposes, particularly for mechanical characterization of materials at high rate of deformations. The performance of a two stages gas gun is studied in this work using the theory of the two-stage gas gun proposed by Rajesh, numerical simulation using combined Eulerian/ Lagrangian elements in Autodyna commercial code and experiment using a two stage gas g...
متن کامل