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Title: Physics-guided multi-objective mixture optimization for functional cementitious composites containing microencapsulated phase changing materials

Journal Article · · Materials & Design

A physics-guided multi-objective optimization procedure is developed for the mixture design of functional cementitious materials containing microencapsulated phase change materials (MEPCM). The mixture design procedure combines physics-based models with multi-objective optimization and decisionmaking methods to meet user’s demands on material’s mechanical and thermal properties, as well as the requirements for sustainability, functionalities, and cost. Physics-based models were utilized to draw the linkage between design variables and objective functions, including a hydration model to capture the hydration kinetics of slag-blended cement and a multiscale sub-stepping homogenization model to obtain the properties of cementitious composite. The multi-objective feasible enhanced particle swarm optimization (MOFEPSO) algorithm and the technique for preference by similarity to an ideal solution (TOPSIS) algorithm are used for mixture optimization and decision-making. The material design method is demonstrated through the design of functional cementitious composite materials containing two MEPCMs – i.e., a polymer encapsulated paraffin wax (PolyPCM) and a recently developed fly-ash cenosphere encapsulated PCM (CenoPCM). The design decision-making charts show the trade-offs among mechanical, thermal, and economic performances of cementitious composites containing MEPCMs. The mixture optimization and decision-making method can be used to assist the design of a variety types of functional cementitious composite and concrete.

Research Organization:
Univ. of Alabama, Tuscaloosa, AL (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE); National Science Foundation (NSF)
Grant/Contract Number:
CMMI-1954517; EE-0008677; EE0008677
OSTI ID:
1785790
Alternate ID(s):
OSTI ID: 1848859
Journal Information:
Materials & Design, Journal Name: Materials & Design Vol. 207 Journal Issue: C; ISSN 0264-1275
Publisher:
ElsevierCopyright Statement
Country of Publication:
United Kingdom
Language:
English

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