Macroscopic properties and air pores of tailings concrete under dry-wet cycles of chloride attack based on principal component analysis (PCA)

IF 8 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Construction and Building Materials Pub Date : 2025-06-14 DOI:10.1016/j.conbuildmat.2025.142233

Yi Li , Xin Bian , Junlei Sheng , Sujuan Yang

引用次数: 0

Abstract

To explore the relationship between air pores and macroscopic properties, normal concrete (NC), iron ore tailings concrete (TC), and steel fiber-reinforced tailings concrete (SFTC) were selected as research objects. Performance tests were conducted after 30, 60, 90, 120, 150, and 180 days of chloride dry-wet cycles, including measurements of compressive strength, chloride permeability, and air pores. ImageJ was used to process images and extract characteristic parameters of the air pores. The fractal dimension of pore axes was calculated, and principal component analysis (PCA) was performed. Results show that the shape parameters have the greatest impact on the mechanical properties for NC and the quantity parameter for TC and SFTC. And the distribution parameters have the greatest impact on the permeability for NC and TC and the quantity parameter for SFTC.

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基于主成分分析（PCA）的干湿循环氯化物侵蚀下尾矿混凝土宏观性能及气孔

为探究气孔与宏观性能之间的关系，选取普通混凝土（NC）、铁矿尾矿混凝土（TC）和钢纤维增强尾矿混凝土（SFTC）作为研究对象。在氯化物干湿循环30、60、90、120、150和180天后进行性能测试，包括抗压强度、氯化物渗透性和空气孔隙的测量。利用ImageJ对图像进行处理，提取气孔特征参数。计算了孔隙轴的分形维数，并进行了主成分分析。结果表明，形状参数对数控加工的力学性能影响最大，而TC和SFTC的数量参数对力学性能影响最大。分布参数对NC和TC的磁导率和SFTC的数量参数影响最大。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Construction and Building Materials 工程技术-材料科学：综合

CiteScore

13.80

自引率

21.60%

发文量

3632

审稿时长

82 days

期刊介绍： Construction and Building Materials offers an international platform for sharing innovative and original research and development in the realm of construction and building materials, along with their practical applications in new projects and repair practices. The journal publishes a diverse array of pioneering research and application papers, detailing laboratory investigations and, to a limited extent, numerical analyses or reports on full-scale projects. Multi-part papers are discouraged. Additionally, Construction and Building Materials features comprehensive case studies and insightful review articles that contribute to new insights in the field. Our focus is on papers related to construction materials, excluding those on structural engineering, geotechnics, and unbound highway layers. Covered materials and technologies encompass cement, concrete reinforcement, bricks and mortars, additives, corrosion technology, ceramics, timber, steel, polymers, glass fibers, recycled materials, bamboo, rammed earth, non-conventional building materials, bituminous materials, and applications in railway materials.