提高生态混凝土长期强度和耐久性能的可持续外加剂：沙特农用工业副产品的创新应用

IF 2.1 Q2 CONSTRUCTION & BUILDING TECHNOLOGY

International Journal of Building Pathology and Adaptation Pub Date : 2024-05-20 DOI:10.1108/ijbpa-03-2024-0069

M. Amran, Ali M. Onaizi

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引用次数: 0

摘要

目的低碳混凝土是减轻熟料生产造成的全球变暖影响的一个新方向。利用沙特农用工业副产品作为水泥替代品，是减少熟料生产、促进基础设施创新和循环经济概念、实现建筑业脱碳的关键支持。粉煤灰（FA）作为水泥替代品的使用已经过研究，并被证明能有效提高以粉煤灰为基础的混凝土的耐久性，尤其是在较低的替代水平下。本研究设计了低碳混凝土混合料，用粉煤灰替代 50% 的水泥。采用不同比例的纳米玻璃粉（占水泥重量的 4% 和 6%）作为纳米材料添加剂，以提高所设计混凝土的机械性能和耐久性。研究结果表明，用有效微生物（EMs）肉汤取代 10%的拌合水并加入纳米材料添加剂后，对抗性和耐久性能产生了显著的积极影响。最佳的混合比例是含有 10% EMs 和 4-6% 纳米玻璃粉添加剂的混合比例。本研究的重点是从沙特工业废料中开发纳米材料添加剂，并提出了一种具有成本效益且可行的解决方案，以提高基于 FA 的混凝土的性能。研究还发现，EMs 的加入可有效提高混凝土的抗压性能。

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Sustainable admixtures to enhance long-term strength and durability properties of eco-concrete: an innovative use of Saudi agro-industrial by-products

PurposeLow-carbon concrete represents a new direction in mitigating the global warming effects caused by clinker manufacturing. Utilizing Saudi agro-industrial by-products as an alternative to cement is a key support in reducing clinker production and promoting innovation in infrastructure and circular economy concepts, toward decarbonization in the construction industry. The use of fly ash (FA) as a cement alternative has been researched and proven effective in enhancing the durability of FA-based concrete, especially at lower replacement levels. However, at higher replacement levels, a noticeable impediment in mechanical strength indicators limits the use of this material.Design/methodology/approachIn this study, low-carbon concrete mixes were designed by replacing 50% of the cement with FA. Varying ratios of nano-sized glass powder (4 and 6% of cement weight) were used as nanomaterial additives to enhance the mechanical properties and durability of the designed concrete. In addition, a 10% of the mixing water was replaced with EMs dosage.FindingsThe results obtained showed a significant positive impact on resistance and durability properties when replacing 10% of the mixing water with effective microorganisms (EMs) broth and incorporating nanomaterial additives. The optimal mix ratios were those designed with 10% EMs and 4–6% nano-sized glass powder additives. However, it can be concluded that advancements in eco-friendly concrete additive technologies have made significant contributions to the development of sophisticated concrete varieties.Originality/valueThis study focused at developing nanomaterial additives from Saudi industrial wastes and at presenting a cost-effective and feasible solution for enhancing the properties of FA-based concrete. It has also been found that the inclusion of EMs contributes effectively to enhancing the concrete's resistance properties.

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来源期刊

International Journal of Building Pathology and Adaptation CONSTRUCTION & BUILDING TECHNOLOGY-

CiteScore

4.80

自引率

18.20%

发文量

期刊介绍： The International Journal of Building Pathology and Adaptation publishes findings on contemporary and original research towards sustaining, maintaining and managing existing buildings. The journal provides an interdisciplinary approach to the study of buildings, their performance and adaptation in order to develop appropriate technical and management solutions. This requires an holistic understanding of the complex interactions between the materials, components, occupants, design and environment, demanding the application and development of methodologies for diagnosis, prognosis and treatment in this multidisciplinary area. With rapid technological developments, a changing climate and more extreme weather, coupled with developing societal demands, the challenges to the professions responsible are complex and varied; solutions need to be rigorously researched and tested to navigate the dynamic context in which today''s buildings are to be sustained. Within this context, the scope and coverage of the journal incorporates the following indicative topics: • Behavioural and human responses • Building defects and prognosis • Building adaptation and retrofit • Building conservation and restoration • Building Information Modelling (BIM) • Building and planning regulations and legislation • Building technology • Conflict avoidance, management and disputes resolution • Digital information and communication technologies • Education and training • Environmental performance • Energy management • Health, safety and welfare issues • Healthy enclosures • Innovations and innovative technologies • Law and practice of dilapidation • Maintenance and refurbishment • Materials testing • Policy formulation and development • Project management • Resilience • Structural considerations • Surveying methodologies and techniques • Sustainability and climate change • Valuation and financial investment