New Computational Model Based on Finite Element Method to Quantify Damage Evolution Due to External Sulfate Attack on Self-Compacting Concretes
作者： Mohammed-Rissel Khelifa , Sofiane Guessasma
DOI: 10.1111/J.1467-8667.2012.00793.X
关键词:
摘要: In this article experimental and numerical investigations are combined to study the mechanical degradation of self-compacting concrete under accelerated aging conditions. Four different treatments tested. Constant immersion immersion-drying protocols allow an efficient external sulfate attack material. Significant damage is observed due interfacial ettringite. A predictive analysis then adopted quantify relationship between ettringite growth evolution during aging. Typical 3D microstructures representing cement paste-aggregate structures generated using Monte Carlo scheme. The images converted into a finite element model predict performance criteria kinetics. effect associated development interphase lower properties. authors results show that time Young's modulus best described by linear increase content. indicate also regions grow at maximum stress rather than exclusively interfaces. Finally, constant predicts rate five times protocol.
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