Javan Hossein, Honarbakhsh Amin, Movahedifar Seyed Mojtaba, Nobahari Mehdi, Zhiani Rahele
Department of Civil Engineering, Neyshabur Branch, Islamic Azad University, Neyshabur, Iran.
New Materials Technology and Processing Research Center, Department of Civil Engineering, Neyshabur Branch, Islamic Azad University, Neyshabur, Iran.
Sci Rep. 2025 Apr 7;15(1):11811. doi: 10.1038/s41598-025-96034-2.
The utilization of nanoparticles in concrete has been propelled by their advantageous attributes, such as their fine particle size and remarkable reactivity. To enhance these properties, various nanoparticles can be integrated into the lightweight concrete matrix. We introduce a novel technique to produce TiO structures resembling dandelions, featuring interfaces between anatase and TiO phases as well as a distinct outer layer. This approach utilizes a deep eutectic solvent-tuning method that is both user- and environmentally friendly. The formation of this remarkable external covering is attributed to the hierarchical arrangement of two-dimensional ultrathin nanosheets with mesopores in a three-dimensional configuration. The primary focus of this study is the utilization of DFNT, a nanoparticle possessing a three-dimensional structure, within the matrix of lightweight concrete. To conduct this study, concrete cases with congestion of 1000 kg/m were fabricated and subjected to testing. We sought to evaluate the effect of different weight ratio proportions of DFNT on the enduring characteristics of lightweight concrete, such as the contraction caused by drying, the degree of openness, the capacity to absorb water, and the speed at which ultrasonic waves travel. The inclusion of DFNT induces a transformation in the microstructural composition of lightweight concrete, shifting it from a loose needle-like structure to a more compact and cohesive microstructure characteristic of cementitious composites. Furthermore, DFNT enhances the lightweight concrete matrix by occupying the empty spaces, tiny fractures, and gaps present within it.
纳米颗粒在混凝土中的应用因其诸如细粒径和显著反应活性等有利特性而得到推动。为增强这些性能，可将各种纳米颗粒融入轻质混凝土基体中。我们引入一种新颖技术来制备类似蒲公英的TiO结构，其具有锐钛矿相和TiO相之间的界面以及独特的外层。该方法采用一种对用户友好且环保的深度共熔溶剂调控法。这种显著外层的形成归因于二维超薄纳米片与中孔在三维构型中的分层排列。本研究的主要重点是在轻质混凝土基体中利用具有三维结构的纳米颗粒DFNT。为开展这项研究，制作了堆积密度为1000 kg/m的混凝土试件并进行测试。我们试图评估不同重量比比例的DFNT对轻质混凝土耐久性特征的影响，如干燥收缩、孔隙率、吸水能力以及超声波传播速度。DFNT的加入导致轻质混凝土微观结构组成发生转变，从松散的针状结构转变为水泥基复合材料更致密且内聚的微观结构。此外，DFNT通过填充轻质混凝土基体中存在的空隙、微小裂缝和间隙来增强基体。
