Investigation of the Role of Nano-Titanium on Corrosion and Thermal Performance of Structural Concrete with Macro-Encapsulated PCM

被引：18
|
作者：
Mohseni, Ehsan [1 ]
Tang, Waiching [1 ]
Wang, Shanyong [2 ]
机构：
[1] Univ Newcastle, Sch Architecture & Built Environm, Callaghan, NSW 2308, Australia
[2] Univ Newcastle, ARC Ctr Excellence Geotech Sci & Engn, Callaghan, NSW 2308, Australia
来源：
MOLECULES | 2019年 / 24卷 / 07期
基金：
澳大利亚研究理事会;
关键词：
phase change materials; thermal energy storage aggregates; nano-titanium; accelerated corrosion test; thermal conductivity; SELF-COMPACTING MORTAR; PHASE-CHANGE MATERIAL; DURABILITY PROPERTIES; MECHANICAL-PROPERTIES; ENERGY STORAGE; CEMENT MORTARS; FLY-ASH; BUILDINGS; MICROSTRUCTURE; NANOPARTICLES;
D O I：
10.3390/molecules24071360
中图分类号：
Q5 [生物化学]; Q7 [分子生物学];
学科分类号：
071010 ; 081704 ;
摘要：
The present study aims to investigate the impact of thermal energy storage aggregate (TESA) and nano-titanium (NT) on properties of structural concrete. TESA was made of scoria encapsulated with phase change materials (PCMs). Coarse aggregates were replaced by TESA at 100% by volume of aggregate and NT was added at 5% by weight of cement. Compressive strength, probability of corrosion, thermal performance, and microstructure properties were studied. The results indicated that the presence of TESA reduced the compressive strength of concrete, although the strength was still high enough to be used as structural concrete. The use of TESA significantly improved the thermal performance of concrete, and slightly improved the resistance of corrosion in concrete. The thermal test results showed that TESA concrete reduces the peak temperature by 2 degrees C compared to the control. The addition of NT changed the microstructure of concrete, which resulted in higher compressive strength. Additionally, the use of NT further enhanced the thermal performance of TESA concrete by reducing the probability of corrosion remarkably. These results confirmed the crucial role of NT in improving the permeability and the thermal conductivity of mixtures containing PCM. In other words, the charging and discharging of TESA was enhanced with the presence of NT in the mixture.
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页数：17
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