Abstract

Phase Change Materials (PCMs) incorporated into cementitious systems have been well-studied with respect to energy efficiency of building envelopes. New applications of PCMs in infrastructural concrete, e.g., for mitigating early-age cracking and freeze-and-thaw induced damage, have been proposed. Hence this paper develops a detailed understanding of the characteristics of cementitious systems containing two different microencapsulated PCMs. The PCMs are evaluated using thermal analysis, vibrational (FTIR) spectroscopy, and electron microscopy, and their dispersion in cement pastes is quantified using X-ray Computed Microtomography (μCT). The influences of PCMs on cement hydration and pore structure are evaluated. The compressive strength of mortars containing PCMs is noted to be strongly dependent on the encapsulation properties. Finite element simulations carried out on cementitious microstructures are used to assess the influence of interface properties and inter-inclusion interactions. The outcomes provide insights on methods to tailor the component phase properties and PCM volume fraction so as to achieve desirable performance.

Original languageEnglish (US)
Pages (from-to)29-41
Number of pages13
JournalCement and Concrete Composites
Volume73
DOIs
StatePublished - Oct 1 2016

Fingerprint

Phase change materials
Microstructure
Composite materials
Experiments
Cements
Vibrational spectroscopy
Pore structure
Ointments
Mortar
Encapsulation
Hydration
Thermoanalysis
Electron microscopy
Compressive strength
Energy efficiency
Volume fraction
Concretes
X rays

Keywords

  • Compressive strength
  • Dispersion
  • Finite element analysis
  • Microstructure
  • Phase change materials (PCMs)
  • Pore structure

ASJC Scopus subject areas

  • Materials Science(all)
  • Building and Construction

Cite this

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title = "The influence of microencapsulated phase change material (PCM) characteristics on the microstructure and strength of cementitious composites: Experiments and finite element simulations",
abstract = "Phase Change Materials (PCMs) incorporated into cementitious systems have been well-studied with respect to energy efficiency of building envelopes. New applications of PCMs in infrastructural concrete, e.g., for mitigating early-age cracking and freeze-and-thaw induced damage, have been proposed. Hence this paper develops a detailed understanding of the characteristics of cementitious systems containing two different microencapsulated PCMs. The PCMs are evaluated using thermal analysis, vibrational (FTIR) spectroscopy, and electron microscopy, and their dispersion in cement pastes is quantified using X-ray Computed Microtomography (μCT). The influences of PCMs on cement hydration and pore structure are evaluated. The compressive strength of mortars containing PCMs is noted to be strongly dependent on the encapsulation properties. Finite element simulations carried out on cementitious microstructures are used to assess the influence of interface properties and inter-inclusion interactions. The outcomes provide insights on methods to tailor the component phase properties and PCM volume fraction so as to achieve desirable performance.",
keywords = "Compressive strength, Dispersion, Finite element analysis, Microstructure, Phase change materials (PCMs), Pore structure",
author = "Matthew Aguayo and Sumanta Das and Amit Maroli and Nihat Kabay and Mertens, {James C E} and Subramaniam Rajan and Gaurav Sant and Nikhilesh Chawla and Narayanan Neithalath",
year = "2016",
month = "10",
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language = "English (US)",
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T1 - The influence of microencapsulated phase change material (PCM) characteristics on the microstructure and strength of cementitious composites

T2 - Experiments and finite element simulations

AU - Aguayo, Matthew

AU - Das, Sumanta

AU - Maroli, Amit

AU - Kabay, Nihat

AU - Mertens, James C E

AU - Rajan, Subramaniam

AU - Sant, Gaurav

AU - Chawla, Nikhilesh

AU - Neithalath, Narayanan

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N2 - Phase Change Materials (PCMs) incorporated into cementitious systems have been well-studied with respect to energy efficiency of building envelopes. New applications of PCMs in infrastructural concrete, e.g., for mitigating early-age cracking and freeze-and-thaw induced damage, have been proposed. Hence this paper develops a detailed understanding of the characteristics of cementitious systems containing two different microencapsulated PCMs. The PCMs are evaluated using thermal analysis, vibrational (FTIR) spectroscopy, and electron microscopy, and their dispersion in cement pastes is quantified using X-ray Computed Microtomography (μCT). The influences of PCMs on cement hydration and pore structure are evaluated. The compressive strength of mortars containing PCMs is noted to be strongly dependent on the encapsulation properties. Finite element simulations carried out on cementitious microstructures are used to assess the influence of interface properties and inter-inclusion interactions. The outcomes provide insights on methods to tailor the component phase properties and PCM volume fraction so as to achieve desirable performance.

AB - Phase Change Materials (PCMs) incorporated into cementitious systems have been well-studied with respect to energy efficiency of building envelopes. New applications of PCMs in infrastructural concrete, e.g., for mitigating early-age cracking and freeze-and-thaw induced damage, have been proposed. Hence this paper develops a detailed understanding of the characteristics of cementitious systems containing two different microencapsulated PCMs. The PCMs are evaluated using thermal analysis, vibrational (FTIR) spectroscopy, and electron microscopy, and their dispersion in cement pastes is quantified using X-ray Computed Microtomography (μCT). The influences of PCMs on cement hydration and pore structure are evaluated. The compressive strength of mortars containing PCMs is noted to be strongly dependent on the encapsulation properties. Finite element simulations carried out on cementitious microstructures are used to assess the influence of interface properties and inter-inclusion interactions. The outcomes provide insights on methods to tailor the component phase properties and PCM volume fraction so as to achieve desirable performance.

KW - Compressive strength

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KW - Phase change materials (PCMs)

KW - Pore structure

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