纤维素纳米纤维和石灰石填充剂可以实现高性能,可持续和经济高效的可打印混凝土
Yu Wang1, Ala Eddin Douba1,2, Naveenkumar Rajendiran3,4
1Lyles School of Civil and Construction Engineering, Purdue University, West Lafayette, IN, USA.
Nature communications
|February 9, 2026
概括
这项研究引入了一种使用纤维素纳米纤维和石灰岩填充剂的新型可打印混凝土,显著改善了质特性和机械强度. 这种可持续的低碳混凝土可以将水泥含量降低40%以实现高效的3D打印应用.
科学领域:
- 材料科学 材料科学 材料科学
- 土木工程 土木工程是指土木工程.
- 可持续建筑 可持续建筑
背景情况:
- 3D打印混凝土需要精确的质性质才能成功制造.
- 传统可打印混凝土中的高水泥含量和化学添加剂对性能,可持续性和成本构成挑战.
- 平衡可打印性,机械强度和环境影响对于推进混凝土3D打印至关重要.
研究的目的:
- 开发一种高性能,低碳,经济高效的可打印混凝土混合物.
- 研究纤维素纳米纤维和石灰岩填充剂对质和机械性能的影响.
- 为了证明开发的混合物对大规模3D打印的可行性和好处.
主要方法:
- 使用纤维素纳米纤维和石灰石填充剂作为部分水泥替代品,制造可打印混凝土.
- 风湿学测试用于评估静态产量应力,储存模量,临界应变和粘度.
- 机械测试 (压力和屈曲强度) 和微结构分析 (水合和硬化).
- 机器人3D打印一个大规模的元素.
- 技术经济分析和生命周期评估.
主要成果:
- 加入0.3%的纤维素纳米纤维和29%的石灰石填充剂显著提高了静态产量应力 (+1213%),存储模量 (+255%) 和临界应变 (+542%) .
- 石灰石填充剂加速了水解和早期硬;纤维素纳米纤维通过合物相互作用改善了静态产量应力.
- 水泥含量减少了高达40%,而不会影响压力和曲强度.
- 一个大规模元素的成功机器人3D打印验证了混合物的可扩展性.
结论:
- 开发的可打印混凝土混合物为3D打印应用提供了可持续,经济高效和高性能的替代方案.
- 纤维素纳米纤维和石灰石填充剂有效地改善了质性质和机械性能,同时减少了对环境的影响.
- 这项研究表明,使用3D打印混凝土进行大规模环保建筑的可行途径.
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