评估使用反弹测试将3D打印混凝土废物作为聚合物的再生聚合混凝土的性能
Girum Mindaye Mengistu1, Rita Nemes1
1Department of Construction Materials and Technologies, Faculty of Civil Engineering, Budapest University of Technology and Economics, Műegyetem Rkp. 3, 1111 Budapest, Hungary.
Heliyon
|March 10, 2025
概括
使用3D打印混凝土 (3DPC) 废弃物的再生聚合混凝土 (RAC) 显示出随着时间的推移有前途的强度发展. 更高的回收聚合物含量通常会提高压力强度,新的公式有助于进行非破坏性测试评估.
科学领域:
- 土木工程 土木工程是指土木工程.
- 材料科学 材料科学 材料科学
- 可持续建筑 可持续建筑
背景情况:
- 3D打印混凝土 (3DPC) 废弃物提出了重大处置挑战.
- 将3DPC废弃物回收成回收聚合物,为混凝土生产提供了一个可持续的解决方案.
- 在建筑中利用废弃材料可以减少对环境的影响,并节约自然资源.
研究的目的:
- 为了研究含有3DPC废物的回收聚合混凝土 (RAC) 的压力强度.
- 评估用于评估RAC强度的非破坏性测试 (NDT) 方法的有效性.
- 用NDT结果开发一个用于预测RAC强度的经验公式.
主要方法:
- 3DPC废物被粉碎成回收聚合物 (细和粗).
- 回收聚合物与河流沙子混合在50%和67%的替代水平.
- 进行反弹测试 (NDT),并通过标准压缩测试 (DT) 进行验证.
主要成果:
- 在一年内,RAC强度逐渐增加,受密度的影响.
- 表面温度高于30°C导致估计强度偏差高达11.5%.
- 更高的回收聚合物含量 (50%和67%) 一般导致压力强度增加.
- 一个经验公式被开发来预测RAC强度.
结论:
- 3DPC废物可以有效地用作混凝土中的回收聚合物.
- 像反弹测试一样的NDT方法可以在适当考虑的情况下可靠地评估RAC强度.
- 开发的经验公式提高了RAC基于NDT的强度预测的准确性.
- 这项研究支持在建筑中可持续使用3DPC废物.
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