Microstructure, interface characteristics and compressive strength of CNTs/Clay hybrid- high early strength Portland cement composites

IF 5.6 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International Pub Date : 2026-04-01 Epub Date: 2025-11-07 DOI:10.1016/j.ceramint.2025.11.082

Supakporn Aodkeng , Sakprayut Sinthupinyo , Wilasinee Hanpongpun , Arnon Chaipanich

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Abstract

Carbon nanotubes (CNTs) have outstanding strength properties that have potential to improve the durability and strength of concrete. CNTs/clay hybrid, produced from chemical vapor deposition method, was found to enhance compressive strength of cement matrix using a small amount. In this research, CNTs/clay hybrid were added at 0.02 wt% up to 0.20 wt%. with high early strength Portland cement (ASTM type III). Compressive strength was investigated at an early age until 28 days. Microstructure, interface characteristics and pore size distribution by mercury intrusion porosimetry (MIP) were also investigated. In addition, Phase characterizations were investigated by X-ray diffraction and scanning electron microscopy (SEM) with energy dispersive spectroscopy (EDS). CNTs/clay hybrid was found to contribute to the compressive strength enhancement of the early strength developed by high early strength Portland cement which was optimum at 0.10 wt%. The MIP results showed that the addition of CNTs/clay hybrids contributes to reducing the pore size within the cement paste. Furthermore, CNTs/clay hybrid can be seen bridged between the hydration products which help load transfer within the cement matrix.

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CNTs/粘土杂化-高早强硅酸盐水泥复合材料的微观结构、界面特性和抗压强度

碳纳米管（CNTs）具有优异的强度性能，具有提高混凝土耐久性和强度的潜力。采用化学气相沉积法制备的CNTs/粘土杂化物，少量加入即可提高水泥基体的抗压强度。在本研究中，CNTs/粘土混合物的添加量为0.02 wt%至0.20 wt%。采用高早强波特兰水泥（ASTM III型）。在幼龄至28天时研究抗压强度。用压汞孔隙法（MIP）研究了复合材料的微观结构、界面特征和孔径分布。此外，利用x射线衍射和扫描电子显微镜（SEM）和能谱仪（EDS）对其进行了相表征。研究发现，碳纳米管/粘土混合物有助于提高高早强波特兰水泥的抗压强度，其抗压强度在0.10 wt%时达到最佳。MIP结果表明，CNTs/粘土杂化体的加入有助于减小水泥浆体内部的孔径。此外，CNTs/粘土杂化可以在水化产物之间架起桥梁，有助于水泥基体内的载荷传递。

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来源期刊

Ceramics International 工程技术-材料科学：硅酸盐

CiteScore

9.40

自引率

15.40%

发文量

4558

审稿时长

25 days

期刊介绍： Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties. Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour. Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.