?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=Micromechanical+modelling+of+fracture+processes+in+cement+composites&rft.creator=Zhang%2C+M&rft.creator=Jivkov%2C+A&rft.description=Cement+composites+are+the+most+popular+and+widely+used+construction%0D%0Amaterial+in+the+world.+Understanding+and+predicting+fracture+processes+in+these+materials%0D%0Ais+scientifically+challenging+but+important+for+durability+assessments+and+life+extension%0D%0Adecisions.+A+recently+proposed+microstructure-informed+site-bond+model+with+elasticbrittle+spring+bundles+is+developed+further+to+predict+the+elastic+properties+and+fracture%0D%0Aprocess+of+cement+paste.+It+accounts+for+microstructure+characteristics+obtained+from%0D%0Ahigh+resolution+X-ray+computed+microtomography+(micro-CT).+Volume+fraction+and%0D%0Asize+distribution+of+anhydrous+cement+grains+are+used+to+determine+the+model+length%0D%0Ascale+and+pore-less+elasticity.+Porosity+and+pore+size+distribution+are+used+for+tuning%0D%0Aelastic+and+failure+properties+of+individual+bonds.+The+fracture+process+is+simulated+by%0D%0Aconsecutive+removal+of+bonds+subject+to+failure+criterion.+The+stress-strain+response+and%0D%0Aelastic+properties+of+cement+paste+are+obtained.+The+simulated+Young%E2%80%99s+modulus+and%0D%0Adeformation+response+prior+to+peak+stress+agree+very+well+with+the+experimental+data.%0D%0AThe+proposed+model+provides+an+effective+tool+to+simulate+micro-cracks+initiation%2C%0D%0Apropagation%2C+coalescence+and+localization.&rft.subject=Cement+paste%2C+Microstructure%2C+Site-bond+model%2C+Elasticity%2C+Micro-cracks.&rft.date=2014-09-10&rft.type=Proceedings+paper&rft.language=eng&rft.source=+++++In%3A++Proceedings+of+the+3rd+International+Conference+on+Service+Life+Design+for+Infrastructure.+++++(2014)+++++&rft.identifier=https%3A%2F%2Fdiscovery.ucl.ac.uk%2Fid%2Feprint%2F10060616%2F