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纤维素纳米晶体水泥浆体的断裂性能评估

Fracture Properties Evaluation of Cellulose Nanocrystals Cement Paste.

作者信息

Ghahari SeyedAli, Assi Lateef N, Alsalman Ali, Alyamaç Kürşat E

机构信息

School of Civil Engineering, Purdue University, West Lafayette, IN 47907, USA.

Studies and Research Unit, Al-Mustaqbal University College, Babylon 51001, Iraq.

出版信息

Materials (Basel). 2020 May 31;13(11):2507. doi: 10.3390/ma13112507.

DOI:10.3390/ma13112507
PMID:32486384
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7321427/
Abstract

Due to the need for high-performance and sustainable building materials, the investigation of the determination of fracture toughness of cement paste using new and sustainable materials, such as cellulose nanocrystals (CNCs) is worthwhile. Contrary to other well-known nano-reinforcement particles, such as carbon nanotubes, CNCs are less toxic; therefore, they have less safety and environmental risks. Fracture behavior of cement paste has been studied intensively for a long time. However, the incorporation of new materials in the cement paste, such as cellulose nanocrystal materials (CNCs), has not been fully investigated. In this paper, the fracture behavior, compressive strength, and hydration properties of cement paste reinforced with cellulose nanocrystal particles were studied. At the age of 3, 7, and 28 days, a three-point bending moment test, and a calorimetry and thermogravimetric analysis, scanning electron microscopy (SEM), and energy dispersive x-ray spectroscopy (EDX) analysis were performed on the water-to-binder-weight ratio of 0.35 cement paste, containing 0.0%, 0.2%, and 1.0% volume cellulose nanocrystals. Results indicated that the fracture properties and compressive strength were improved for the sample containing 0.2% CNCs. Preliminary results indicate that CNCs can improve the fracture behavior of cementitious materials and can be considered as a renewable and sustainable material in construction.

摘要

由于对高性能和可持续建筑材料的需求，研究使用新型可持续材料（如纤维素纳米晶体（CNC））测定水泥浆体的断裂韧性是值得的。与其他知名的纳米增强颗粒（如碳纳米管）不同，CNC的毒性较小；因此，它们具有较低的安全和环境风险。长期以来，人们对水泥浆体的断裂行为进行了深入研究。然而，在水泥浆体中掺入新型材料（如纤维素纳米晶体材料（CNC））尚未得到充分研究。本文研究了纤维素纳米晶体颗粒增强水泥浆体的断裂行为、抗压强度和水化性能。在3天、7天和28天龄期时，对水胶比为0.35、含有0.0%、0.2%和1.0%体积纤维素纳米晶体的水泥浆体进行了三点弯曲试验、量热法和热重分析、扫描电子显微镜（SEM）和能量色散X射线光谱（EDX）分析。结果表明，含有0.2%CNC的样品的断裂性能和抗压强度得到了改善。初步结果表明，CNC可以改善胶凝材料的断裂行为，并且可以被视为建筑中的可再生和可持续材料。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b424/7321427/9e3bd408f5d5/materials-13-02507-g011.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b424/7321427/9e3bd408f5d5/materials-13-02507-g011.jpg

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