Toward a better understanding of multifunctional cement-based materials: The impact of graphite nanoplatelets (GNPs)

被引：34

作者：

Lamastra, Francesca R. ^{[1
]}

Chougan, Mehdi ^{[1
,2
]}

Marotta, Emanuele ^{[1
]}

Ciattini, Samuele ^{[3
]}

Ghaffar, Seyed Hamidreza ^{[2
]}

Caporali, Stefano ^{[4
]}

Vivio, Francesco ^{[1
]}

Montesperelli, Giampiero ^{[1
]}

Ianniruberto, Ugo ^{[5
]}

Al-Kheetan, Mazen J. ^{[6
]}

Bianco, Alessandra ^{[1
]}

机构：

[1] Univ Roma Tor Vergata, Consortium INSTM RU Roma Tor Vergata, Dipartimento Ingn Impresa Mario Lucertini, Via Politecn, I-00133 Rome, Italy

[2] Brunel Univ London, Dept Civil & Environm Engn, Uxbridge UB8 3PH, Middx, England

[3] Univ Firenze, Ctr Cristallog Strutturale CRIST, Via Lastruccia 3, I-50019 Sesto Fiorentino, Italy

[4] Univ Firenze, Consortium INSTM RU Firenze, Dipartimento Ingn Ind DIEF, Via Santa Marta 3, I-50139 Florence, Italy

[5] Univ Roma Tor Vergata, Dipartimento Ingn Civile Informat DICII, Viale Politecn, I-00133 Rome, Italy

[6] Mutah Univ, Civil & Environm Engn Dept, POB 7, Mutah 61710, Karak, Jordan

来源：

CERAMICS INTERNATIONAL | 2021年 / 47卷 / 14期

关键词：

Cementitious nanocomposites; Graphite nanoplatelets (GNPs); Mechanical properties; Microstructure; Resistivity; Thermal conductivity; GRAPHENE NANOPLATELETS; MECHANICAL-PROPERTIES; ELECTRICAL-PROPERTIES; THERMAL-CONDUCTIVITY; COMPOSITES; MICROSTRUCTURE; CONCRETE; MORTAR; ENHANCEMENT; RESISTIVITY;

D O I：

10.1016/j.ceramint.2021.04.012

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The impact of graphite nanoplatelets (GNPs) on the physical and mechanical properties of cementitious nanocomposites was investigated. A market-available premixed mortar was modified with 0.01% by weight of cement of commercial GNPs characterized by two distinctively different aspect ratios. The rheological behavior of the GNP-modified fresh admixtures was thoroughly evaluated. Hardened cementitious nanocomposites were investigated in terms of density, microstructure (Scanning Electron Microscopy, SEM and micro-Computed Tomography, it-CT), mechanical properties (three-point bending and compression tests), and physical properties (electrochemical impedance spectroscopy, EIS and thermal conductivity measurements). At 28 days, all GNP-modified mortars showed about 12% increased density. Mortars reinforced with high aspect ratio GNPs exhibited the highest compressive and flexural strength: about 14% and 4% improvements compared to control sample, respectively. Conversely, low aspect ratio GNPs led to cementitious nanocomposites characterized by 36% decreased electrical resistivity combined with 60% increased thermal conductivity with respect to the control sample.

引用

页码：20019 / 20031

页数：13

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