Alternative Biomineralisation for Concrete without cement (ABioC)

无水泥混凝土的替代生物矿化 (ABioC)

• 批准号: EP/Y015959/1
• 负责人: Ana Margarida Bras
• 金额: $ 23.84万
• 依托单位: Liverpool John Moores University
• 依托单位国家: 英国
• 项目类别: Fellowship
• 财政年份: 2023
• 资助国家: 英国
• 起止时间: 2023 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FY015959%2F1
• 关键词: Alternative; Biomineralisation; Concrete; without; cement

The ABioC project aims at developing a biomineralisation technique using non-encapsulated cells, to improve the properties of Geopolymer Concrete (GPC) infrastructure, by reusing geopolymer precursors currently disposed in landfill as wastes. The geopolymerisation of Pyramids of Giza is an example of the durability of the technique - the binding of aluminosilicates and highly alkaline solutions holding aggregates together, not using Portland cement as a binder. ABioC will benefit the concrete industry by enabling the incorporation of local waste materials in versatile GPCs, offering a path to decarbonisation of the construction sector. This will expand GPC's huge potential applications for infrastructures, making them more environmentally friendly. Current GPCs issues regarding shrinkage and durability. Shrinkage can be 2-4 times higher than in Ordinary Portland Cement (OPC) concrete, chloride penetration is higher than in OPC and the pH is lower, making its use difficult with reinforcement due to corrosion. The long-term durability of GPC remains under-investigated.Biomineralisation recently emerged as a nature-inspired approach to consolidate, repair and protect construction materials through the use of bacteria that promote calcium carbonate deposition in concrete to heal microcracks. ABioC will (O1) study the capacity of the precursors to act as carrier and protect the bacteria from a harsh environment; (O2) elucidate on the mechanisms of bacteria-mediated inhibition of GPC corrosion in structures, compared to reinforced OPC concrete and (O3) demonstrate the potential of self-healing bio-enhanced GPC to prolong the service life of infrastructure with a variety of GPC materials combinations, greatly reducing the need for costly maintenance intervention, in comparison to OPC structures. Such interdisciplinarity, engagement with world-leading experts and stakeholders, will allow the fellow for an exceptional broadening of scientific skills and research portfolio.

ABIOC项目旨在使用非封装细胞来开发一种生物矿化技术，以通过重复使用目前在垃圾填埋场中处置的地质聚合物前体来改善地质聚合物混凝土（GPC）基础设施的性质。 Giza金字塔的地质聚合是该技术持久性的一个例子 - 铝硅酸盐的结合和高度碱性溶液将聚集体固定在一起，而不是将波特兰水泥作为粘合剂。 ABIOC将通过在多功能GPC中纳入当地废料，从而使混凝土行业受益，从而提供建筑业脱碳的道路。这将扩大GPC在基础架构上的巨大潜在应用程序，从而使它们更加环保。当前有关收缩和耐用性的GPC问题。收缩率可能是普通波特兰水泥（OPC）混凝土的2-4倍，氯化物的穿透性高于OPC，并且pH值低，因此由于腐蚀而引起的加固难以使用。 GPC的长期耐用性仍然不足。最近出现了一种自然风格的方法，可以通过使用细菌来巩固，修复和保护建筑材料，从而促进混凝土中碳酸钙沉积以治愈微骨架。 ABIOC（O1）将研究前体充当携带者并保护细菌免受恶劣环境的能力； （O2）与加固的OPC混凝土相比，阐明了细菌介导的GPC腐蚀的抑制作用，并且（O3）证明了自我修复生物增强的GPC的潜力，以延长基础结构的使用寿命，并以各种GPC材料组合的方式进行成本来维持成本。这种跨学科性，与世界领先的专家和利益相关者的互动，将允许该研究员对科学技能和研究组合进行非凡的扩展。