不同f级粉煤灰和硅酸盐水泥掺量冷粘结骨料的综合性能评价

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

Construction and Building Materials Pub Date : 2025-03-26 DOI:10.1016/j.conbuildmat.2025.140936

Phuong Trinh Bui , Thanh Long Tran , Quang Truong Nguyen

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引用次数: 0

摘要

由粉煤灰（FA）和少量波特兰水泥（PC）作为粘合剂制成的冷粘结骨料（CBA）已经成为制造混凝土的天然骨料的替代品。本研究探讨5 - 10-mm-sized CBA捏造的性能从f级FA和PC在不同数量和空气治好了27 ± 2°C,相对湿度80 ±2  % 20 ±4  h和自来水中27岁 ± 2°C评估的潜在好处在可持续使用FA代替天然骨料混凝土生产、自然资源保护和环境保护。实验结果表明，CBA的短期物理力学性能随粘结剂用量、骨料水分状态、养护龄期和试验条件的不同而变化。长时间水固化可以细化CBA的微观结构，提高CBA的物理力学性能。不同添加量的PC（15-100 %质量比）改善了CBA的短期物理力学性能，但显著增加了CBA的生产成本、隐含碳和隐含能量。建立了CBA的物理力学性能之间的关系。总之，由85% % FA和15% % PC制成的CBA是评估的CBA中最具成本效益和环境友好的，尽管性能比其他CBA稍差。

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A comprehensive performance assessment of cold-bonded aggregate with various Class-F fly ash and Portland cement amounts

Cold-bonded aggregate (CBA) made from fly ash (FA) with low amounts of Portland cement (PC) as a binder has emerged as an alternative to natural aggregates for manufacturing concrete. The present study explored the performance of 5- to 10-mm-sized CBA fabricated from Class-F FA and PC at various amounts and air cured at 27 ± 2°C and relative humidity of 80 ± 2 % for 20 ± 4 h and in tap water at 27 ± 2°C to assess the potential benefits of using FA in place of natural aggregate in sustainable concrete production, natural resource conservation, and environmental protection. The experimental results obtained showed that the short-term physicomechanical properties of CBA vary with the binder amounts, aggregate moisture states, curing ages, and test conditions. Long water curing refined the microstructure and enhanced the physicomechanical properties of CBA. The addition of PC at various amounts (15–100 % by mass) improved the short-term physicomechanical properties of CBA but significantly increased the production cost, embodied carbon, and embodied energy. Relationships between the physicomechanical properties of CBA were also established. In conclusion, CBA made from 85 % FA and 15 % PC was the most cost-effective and environmentally friendly of the CBAs evaluated, despite performing slightly more poorly than the other CBAs.

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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.