Meso-damage mechanism of sintered sludge cementitious composites under uniaxial compression: Experimental characterization and theoretical modeling

IF 7.4 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Construction and Building Materials Pub Date : 2025-02-25 DOI:10.1016/j.conbuildmat.2025.140490

Jinrui Zhang , Zhuofan Wu , Youzhi Yang , Ziye Kang , Dongshuai Hou , Biqin Dong

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引用次数: 0

Abstract

Considering the performance and environmental potential of sintered sludge cementitious composite (SSCC), this research comprehensively evaluated the meso-damage mechanism of SSCC under uniaxial compression through experimental characterization and theoretical modeling. Specifically, advanced techniques such as acoustic emission (AE), digital image correlation (DIC), low-field nuclear magnetic resonance (LFNMR), and scanning electron microscopy (SEM) were employed to deeply characterize the damage responses, meso-structures and damage morphology. Theoretical modeling based on the classical damage theory (CDT) framework established a stochastic damage constitutive (SDC) model to elucidate the intrinsic relationship between meso-damage mechanism and macro-performance. Results demonstrated that the stress-strain behavior, energy response, and macro-cracks evolution of SSCC, showing distinctly different behaviors before and after the peak point on the constitutive curves, were accurately predicted by SDC model. LFNMR and SEM confirmed that macro-damage originated from interfacial transition zone (ITZ) fracture. Furthermore, SDC model verified that 5 % SSA effectively enhanced the elasticity and ductility of meso-structure, thereby significantly improving the macro-performance and damage resistance.

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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.