| 基于核磁共振技术分析生活垃圾焚烧灰渣代砂混凝土的微观结构与抗压强度 |
| |
| 引用本文： | 石东升,淮炳栋,马政,姜文超,杨凯.基于核磁共振技术分析生活垃圾焚烧灰渣代砂混凝土的微观结构与抗压强度[J].硅酸盐通报,2023,42(1):248-257. |
| |
| 作者姓名： | 石东升 淮炳栋 马政 姜文超 杨凯 |
| |
| 作者单位： | 1.内蒙古工业大学土木工程学院,呼和浩特 010051;2.兴泰建设集团有限公司,鄂尔多斯 017000;3.内蒙古电力(集团)有限责任公司蒙电项目建管分公司,呼和浩特 010020 |
| |
| 基金项目： | 国家自然科学基金(51868058);内蒙古工业大学研究生教改项目(YJG2020024);兴泰建设集团有限公司研究开发项目(XTXM-RD-01) |
| |
| 摘 要： | 孔结构是混凝土微观结构中重要的组成部分,影响着混凝土的宏观性能,为了研究生活垃圾焚烧灰渣代替天然砂对混凝土孔结构和抗压强度的影响,通过核磁共振技术对生活垃圾焚烧灰渣代砂混凝土微观孔结构进行测试,分析了孔隙率和孔隙分布变化规律,并根据分形理论研究了孔隙分形特征,获得各孔径区间的分形维数与整体分形维数,并探讨了各孔径占比、孔隙率和分形维数与抗压强度之间的灰熵关联度。结果表明:随生活垃圾焚烧灰渣代砂率的增加,混凝土孔隙率增加,无害孔占比减小,抗压强度降低;分形维数随着生活垃圾焚烧灰渣代砂率的增加而减小,由于生活垃圾焚烧灰渣具有潜在的水硬性,随龄期的增长,分形维数呈增加趋势,同时孔隙结构得到了优化。灰熵关联度分析发现生活垃圾焚烧灰渣代砂混凝土整体分形维数和无害孔占比对抗压强度影响最大。
|
| 关 键 词： | 生活垃圾焚烧灰渣 混凝土 孔结构 抗压强度 核磁共振 分形理论 |
| 收稿时间： | 2022-08-26 |
Analysis of Microstructure and Compressive Strength of Concrete with Municipal Solid Waste Incineration Bottom Ash as Sand Based on Nuclear Magnetic Resonance Technology |
| |
| SHI Dongsheng,HUAI Bingdong,MA Zheng,JIANG Wenchao,YANG Kai.Analysis of Microstructure and Compressive Strength of Concrete with Municipal Solid Waste Incineration Bottom Ash as Sand Based on Nuclear Magnetic Resonance Technology[J].Bulletin of the Chinese Ceramic Society,2023,42(1):248-257. |
| |
| Authors: | SHI Dongsheng HUAI Bingdong MA Zheng JIANG Wenchao YANG Kai |
| |
| Affiliation: | 1. School of Civil Engineering, Inner Mongolia University of Technology, Hohhot 010051, China;2. Xingtai Construction Group Co., Ltd., Ordos 017000, China;3. Mongolia Electricity Project Construction Management Branch, Inner Mongolia Electric Power (Group) Co., Ltd., Hohhot 010020, China |
| |
| Abstract: | Pore structure is an important composition of concrete microstructure and affects the macroscopic properties of concrete. This paper aims to study the effect of the substitution of municipal solid waste incineration bottom ash (MSWIBA) for natural sand on the pore structure and compressive strength of concrete. Nuclear magnetic resonance technology was employed to investigate the porosity and the variation character of the pore size distribution for concrete with MSWIBA. Meanwhile, according to the fractal theory, the fractal characteristics of pores were explored, and the fractal dimension of each pore size interval and the overall fractal dimension were obtained. Moreover, the grey entropy correlation degree between each pore size ratio, porosity, fractal dimension, and compressive strength was discussed. The results show that the porosity of concrete increases, and the proportion of harmless pores and compressive strength decrease with the increase of the replacement of natural sand with MSWIBA. Furthermore, the fractal dimension decreases with the increase of the content of MSWIBA. The fractal dimension increases and the pore structure is improved with age due to the potential hydraulic properties of MSWIBA. Meanwhile, the overall fractal dimension and the proportion of harmless pores of concrete with MSWIBA have the greatest influence on the compressive strength based on the grey entropy correlation degree analysis. |
| |
| Keywords: | municipal solid waste incineration bottom ash concrete pore structure compressive strength nuclear magnetic resonance fractal theory |
|
| 点击此处可从《硅酸盐通报》浏览原始摘要信息 |
|
点击此处可从《硅酸盐通报》下载全文 |
|
