Mesoscale analysis for mortar deterioration during freeze-thaw modification of recycled coarse aggregate
Source abstract
Abstract
Freeze-thaw modification of recycled coarse aggregate (RCA) is capable to remove the attached mortar efficiently, which can promote the usage of such eco-friendly recycled construction materials. To produce natural coarse aggregate (NCA) without introducing additional damage by this method, it is important to know the frost resistance of attached mortar in RCA. This paper presents a mesoscale analysis of mortar deterioration during freeze-thaw modification of RCA. The pore size distribution, pore pressure induced from ice formation, meso-scale constitutive laws are modeled and integrated with the discrete element method—Rigid Body Spring Model. The deformation during FTC, crack patterns and the mechanical behaviors are simulated with three typical types of RCA. Experiment results are also adopted to qualitatively show the effectiveness of such freeze-thaw modification. Finally, an empirical model to calculate the deteriorated mechanical properties of RCA is developed according to the numerical analysis.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Recycled Aggregate Concrete Performance · Innovations in Concrete and Construction Materials · Innovative concrete reinforcement materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, China
Department of Civil Engineering, The University of Tokyo, Tokyo, Japan
Zhejiang Communications Construction Group Co., LTD, Hangzhou, China
Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, College of Civil and Transportation Engineering, Shenzhen University, Shenzhen, China
Funding
“Pioneer” and “Leading Goose” R&D Program of Zhejiang · National Natural Science Foundation of China
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