FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2884876149> ?p ?o ?g. }

• W2884876149 abstract "Sprayed concrete lining (SCL) is an important part of soft ground tunnelling. It provides immediate ground support and maintains tunnel stability. A quick set and rapid strength development of freshly sprayed concrete are crucial for maintaining SCL integrity. An inadequate strength development leads to the SCL failure and tunnel instability. This poses serious health and safety risks to construction workers and nearby structures. Therefore, early age strength development monitoring forms a crucial aspect of SCL construction. Currently used testing methods, namely needle penetrometer, stud-driving and uniaxial compressive testing of cored samples, are of destructive nature. To avoid damage to the freshly sprayed lining and to mitigate safety hazards to testing operatives, testing is performed on test panels. Current test methods, however, test a very small part of the sprayed concrete. Since the temperature histories of the lining section are different from the test panels, the outcomes are local in nature and provide an incomplete picture of the SCL strength gain. Thus, there remains a need for a test method with a capability of testing large volumes of the sprayed concrete works remotely, holistically and non- destructively. The maturity method is well established for normal concretes and allows maturity and hence strength to be calculated from a temperature history. A new method called Strength Monitoring Using Thermal Imaging seeks to apply this principle to accelerated sprayed concrete using an Arrhenius equation based maturity function, but there are significant challenges to overcome to obtain the input parameters. This research establishes a thermo-chemo-mechanical evaluation methodology for obtaining the input parameters and verifies its reliability through two detailed case studies on live tunnelling projects. The two-staged methodology involved thermo-chemical evaluation of a total of twelve cement pastes, through isothermal calorimetry and thermogravimetry, and thermo-mechanical evaluation of two sprayed concrete mixes, through strength testing and thermal imaging of more than fifty test panels. The thermo-chemical evaluation revealed that the sprayed concrete has very different hydration kinetics at different temperatures and the reference temperature approach is not valid for the maturity assessments. The maturity modelling procedure was modified to account for kinetics variability. The thermo-mechanical evaluation revealed that sprayed concrete holds a multilinear strength – maturity relationship as against a single linear relationship for plain concrete." @default.
• W2884876149 created "2018-08-03" @default.
• W2884876149 creator A5074370738 @default.
• W2884876149 date "2017-01-01" @default.
• W2884876149 modified "2023-09-26" @default.
• W2884876149 title "Non-destructive approach for sprayed concrete lining strength monitoring" @default.
• W2884876149 hasPublicationYear "2017" @default.
• W2884876149 type Work @default.
• W2884876149 sameAs 2884876149 @default.
• W2884876149 citedByCount "0" @default.
• W2884876149 crossrefType "dissertation" @default.
• W2884876149 hasAuthorship W2884876149A5074370738 @default.
• W2884876149 hasConcept C127413603 @default.
• W2884876149 hasConcept C147176958 @default.
• W2884876149 hasConcept C159985019 @default.
• W2884876149 hasConcept C187320778 @default.
• W2884876149 hasConcept C192562407 @default.
• W2884876149 hasConcept C30407753 @default.
• W2884876149 hasConcept C66938386 @default.
• W2884876149 hasConcept C77595967 @default.
• W2884876149 hasConceptScore W2884876149C127413603 @default.
• W2884876149 hasConceptScore W2884876149C147176958 @default.
• W2884876149 hasConceptScore W2884876149C159985019 @default.
• W2884876149 hasConceptScore W2884876149C187320778 @default.
• W2884876149 hasConceptScore W2884876149C192562407 @default.
• W2884876149 hasConceptScore W2884876149C30407753 @default.
• W2884876149 hasConceptScore W2884876149C66938386 @default.
• W2884876149 hasConceptScore W2884876149C77595967 @default.
• W2884876149 hasLocation W28848761491 @default.
• W2884876149 hasOpenAccess W2884876149 @default.
• W2884876149 hasPrimaryLocation W28848761491 @default.
• W2884876149 hasRelatedWork W1995288409 @default.
• W2884876149 hasRelatedWork W2021624814 @default.
• W2884876149 hasRelatedWork W2053898060 @default.
• W2884876149 hasRelatedWork W2062732920 @default.
• W2884876149 hasRelatedWork W2078414331 @default.
• W2884876149 hasRelatedWork W2099627649 @default.
• W2884876149 hasRelatedWork W2163121981 @default.
• W2884876149 hasRelatedWork W2187071137 @default.
• W2884876149 hasRelatedWork W2188988149 @default.
• W2884876149 hasRelatedWork W2289915358 @default.
• W2884876149 hasRelatedWork W2547745623 @default.
• W2884876149 hasRelatedWork W2557999257 @default.
• W2884876149 hasRelatedWork W2928556546 @default.
• W2884876149 hasRelatedWork W3021333627 @default.
• W2884876149 hasRelatedWork W3137858850 @default.
• W2884876149 hasRelatedWork W605666292 @default.
• W2884876149 hasRelatedWork W620978149 @default.
• W2884876149 hasRelatedWork W622817658 @default.
• W2884876149 hasRelatedWork W790755491 @default.
• W2884876149 hasRelatedWork W2823376460 @default.
• W2884876149 isParatext "false" @default.
• W2884876149 isRetracted "false" @default.
• W2884876149 magId "2884876149" @default.
• W2884876149 workType "dissertation" @default.