Influence of multi-scale three-dimensional pore characteristics on the mechanical properties of graphene oxide and carbon nanotube incorporated cement paste

IF 10.9 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Cement and Concrete Research Pub Date : 2023-09-13 DOI:10.1016/j.cemconres.2023.107326

Heongwon Suh, Seongmin Cho, Sungwun Her, Sungchul Bae

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引用次数: 1

Abstract

The correlation between the three-dimensional pore characteristics and mechanical properties of graphene oxide (GO)-and carbon nanotube (CNT)-incorporated cement pastes were investigated. The nano and micro-scale pore characteristics were evaluated by analyzing pore shapes and spatial distribution properties using a radial distribution function (RDF). As a result of the nucleation sites effect, blade-like and plate-like pores were primarily formed in the GO-incorporated samples and rod-like pores in the CNT-incorporated samples, as compared to the plain samples without nanomaterials. In addition, the pore scattering, instead of the pore clustering property, was improved in the nanomaterial-incorporated samples. Notably, results obtained from X-ray nanoimaging and micro-CT analyses revealed a strong positive linear correlation between the strengths (compressive and splitting tensile strengths) of the composites and the degree of pore scattering.

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多尺度三维孔隙特征对氧化石墨烯-碳纳米管掺入水泥浆体力学性能的影响

研究了氧化石墨烯(GO)和碳纳米管(CNT)水泥体的三维孔隙特征与力学性能之间的关系。利用径向分布函数(RDF)分析孔隙形态和空间分布特性，评价纳米尺度和微观尺度孔隙特征。由于成核位点效应，与不含纳米材料的普通样品相比，氧化石墨烯掺入样品主要形成叶片状和片状孔隙，碳纳米管掺入样品主要形成棒状孔隙。此外，在纳米材料掺入的样品中，孔隙散射而不是孔隙聚类性能得到了改善。值得注意的是，x射线纳米成像和微ct分析结果显示，复合材料的强度(抗压强度和劈裂抗拉强度)与孔隙散射程度之间存在很强的正线性关系。

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来源期刊

Cement and Concrete Research 工程技术-材料科学：综合

CiteScore

20.90

自引率

12.30%

发文量

318

审稿时长

53 days

期刊介绍： Cement and Concrete Research is dedicated to publishing top-notch research on the materials science and engineering of cement, cement composites, mortars, concrete, and related materials incorporating cement or other mineral binders. The journal prioritizes reporting significant findings in research on the properties and performance of cementitious materials. It also covers novel experimental techniques, the latest analytical and modeling methods, examination and diagnosis of actual cement and concrete structures, and the exploration of potential improvements in materials.