亚硝酸盐改善水泥基材料的抗碳化性能

4区材料科学 Q2 Engineering

Advances in Materials Science and Engineering Pub Date : 2024-05-06 DOI:10.1155/2024/8895736

Hao Zhang, Luqing Cheng, Jingsheng Pan, Guodong Xu, Xuyan Shen, Song Mu, Jingshun Cai, Jianzhong Liu, Jinxiang Hong, Zhiqiang Yang, Zhonglai Yi, Huajian Li, Ying Zhou

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引用次数: 0

摘要

抗碳化能力是水泥基材料最重要的耐久性能之一。通过碳化深度实验、等温导热法、X射线衍射、BET和水蒸气吸附等方法，研究了亚硝酸钙（Ca(NO3)2）对水泥基材料碳化性能的影响。结果表明，在不影响后期水化过程的前提下，如果提前改变水泥浆体的水化过程和微观结构，则亚硝酸钙（Ca(NO3)2）的添加可改善水泥基材料的抗碳化性能。此外，细化的孔隙和更高的迂回度减少了通道，从而阻碍了二氧化碳气体进入水泥基材料，这一点已被 BET 和水蒸气吸附所证实。Ca(NO3)2 在提高强化混凝土的抗碳化能力和延长其使用寿命方面表现出了很高的性能。

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Carbonation Resistance of Cement-Based Materials Improved by Nitrite

Carbonation resistance ability is one of the most important durability-related proprieties of cement-based materials. Through the carbonation depth experiment, isothermal conduction calorimetry, XRD, BET, and water vapor sorption, the effect of calcium nitrite (Ca(NO₃)₂) on the carbonation properties of cement-based materials is obtained. The result indicates that the addition of Ca(NO₃)₂ improves the carbonation resistance property of cement-based materials if the hydration of cement pastes and microstructure is modified earlier without affecting the late hydration process. In addition, the refined pores and higher tortuosity cut down the channels, thereby impeding the ingress of carbon dioxide gas into cementitious materials, as confirmed by BET and water vapor sorption. The Ca(NO₃)₂ exhibits high performance in improving the carbonation resistance and extending the life of strengthened concrete.

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来源期刊

Advances in Materials Science and Engineering Materials Science-General Materials Science

CiteScore

3.30

自引率

0.00%

发文量

审稿时长

4-8 weeks

期刊介绍： Advances in Materials Science and Engineering is a broad scope journal that publishes articles in all areas of materials science and engineering including, but not limited to: -Chemistry and fundamental properties of matter -Material synthesis, fabrication, manufacture, and processing -Magnetic, electrical, thermal, and optical properties of materials -Strength, durability, and mechanical behaviour of materials -Consideration of materials in structural design, modelling, and engineering -Green and renewable materials, and consideration of materials’ life cycles -Materials in specialist applications (such as medicine, energy, aerospace, and nanotechnology)