High performance cementitious nanocomposites: The effectiveness of nano-Graphite (nG)

被引：33

作者：

Chougan, Mehdi ^{[1
,3
]}

Marotta, Emanuele ^{[1
]}

Lamastra, Francesca R. ^{[1
]}

Vivio, Francesco ^{[1
]}

Montesperelli, Giampiero ^{[1
]}

Ianniruberto, Ugo ^{[2
]}

Ghaffar, Seyed Hamidreza ^{[3
]}

Al-kheetan, Mazen J. ^{[4
]}

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] Univ Roma Tor Vergata, Dipartimento Ingn Civile & Ingn Informat DICII, Via Politecn, I-00133 Rome, Italy

[3] Brunel Univ London, Coll Engn Design & Phys Sci, Uxbridge UB8 3PH, Middx, England

[4] Mutah Univ Mutah, Coll Engn, Dept Civil & Environm Engn, POB 7, Al Karak 61710, Jordan

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2020年 / 259卷 / 259期

关键词：

Cementitious materials; Nano-graphite; Rheology; Microstructure; Mechanical properties; Permeability; Damping ratio; Electrical resistivity; Thermal conductivity; DYNAMIC-MECHANICAL PROPERTIES; GRAPHENE OXIDE; PIEZORESISTIVE PROPERTIES; ELECTRICAL-RESISTIVITY; RHEOLOGICAL PROPERTIES; CONCRETE; COMPOSITES; MICROSTRUCTURE; HYDRATION; DURABILITY;

D O I：

10.1016/j.conbuildmat.2020.119687

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

In this study an extensive experimental campaign has been conducted on mortars modified with nano-Graphite (nG) aimed to assess the properties of the resulting nanocomposites in terms of density, microstructure, flexural and compressive strength, damping ratio, thermal and electrical conductivity. Permeability properties were also investigated in terms of initial surface absorption, water contact angle, volume of permeable voids and chloride ion diffusion. Premixed mortars have been modified with different dosages of commercial nG, i.e. 0.01%, 0.1%, or 0.2% by weight of cement. The rheological behavior of the fresh admixtures has been investigated. Specimens were casted in bars and hardened in water for 7, 14 or 28 days. At 28 days all samples showed enhanced density (i.e. up to 16%) and mechanical properties (i.e. up to 30%) combined to remarkable decreased overall permeability. The lowest dosage of nG (i.e. 0.01% by weight of cement) resulted in cement nanocomposites with the highest increase in damping ratio, electrical and thermal conductivity, 68%, 30% and 55%, respectively. Crown Copyright (C) 2020 Published by Elsevier Ltd. All rights reserved.

引用

页数：14

共 90 条

[1]

Al-kheetan M.J., 2019, MOISTURE EVALUATION, DOI [10.1080/10298436.2019.1567917., DOI 10.1080/10298436.2019.1567917]

[2] Development of low absorption and high-resistant sodium acetate concrete for severe environmental conditions [J].