Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Lightweight ultrahigh-ductility cement-based composite material as well as design method and preparation method thereof
The invention relates to a lightweight ultrahigh-ductility cement-based composite material, and a design method and a preparation method thereof. The lightweight ultrahigh-ductility cement-based composite material is prepared by the following steps: based on a particle stacking theory, utilizing corrected Aamp; the model A is used as a target curve for optimizing a solid material; drawing a dry particle distribution PSD curve of the initial mix proportion, and comparing the dry particle distribution PSD curve with the corrected Aamp; performing deviation comparison on the A model curve, and qualitatively giving the dosage range of each component; on the basis of micromechanical analysis, considering the inherent defects of the glass beads and the influence of the fiber volume fraction, and on the basis of a fiber bridging model, judging whether the material in each proportion has the strain hardening characteristic or not, and further optimizing the mix proportion; the material is prepared by using a post-doping fiber method, and mechanical properties such as tensile property and compressive strength are tested; the concrete provided by the invention has the characteristics of strain hardening and multiple cracking, solves the problem of poor ductility of common concrete and lightweight concrete, has reasonable compressive strength and certain fluidity, uniformity and fiber dispersibility, and can be directly used in structural engineering.
本发明涉及一种轻质超高延性水泥基复合材料及设计方法、制备方法，基于颗粒堆积理论，利用修正后的A&A模型作为优化固体材料的目标曲线；绘制初步配合比的干粒分布PSD曲线，并与修正后的A&A模型曲线进行偏差对比，定性给出各组份的用量范围；基于微观力学分析，考虑玻璃微珠固有缺陷以及纤维体积分数影响，基于纤维桥接模型，判断各配比下材料是否具有应变硬化特性，并进一步优化配合比；使用后掺纤维法制备材料，并进行拉伸性能以及抗压强度等力学性能测试；本发明具有应变硬化以及多重开裂的特性，解决了普通混凝土以及轻质混凝土延性差的问题，具有合理的抗压强度以及一定的流动性、均匀性和纤维分散性，能够直接用于结构工程中。
Lightweight ultrahigh-ductility cement-based composite material as well as design method and preparation method thereof
The invention relates to a lightweight ultrahigh-ductility cement-based composite material, and a design method and a preparation method thereof. The lightweight ultrahigh-ductility cement-based composite material is prepared by the following steps: based on a particle stacking theory, utilizing corrected Aamp; the model A is used as a target curve for optimizing a solid material; drawing a dry particle distribution PSD curve of the initial mix proportion, and comparing the dry particle distribution PSD curve with the corrected Aamp; performing deviation comparison on the A model curve, and qualitatively giving the dosage range of each component; on the basis of micromechanical analysis, considering the inherent defects of the glass beads and the influence of the fiber volume fraction, and on the basis of a fiber bridging model, judging whether the material in each proportion has the strain hardening characteristic or not, and further optimizing the mix proportion; the material is prepared by using a post-doping fiber method, and mechanical properties such as tensile property and compressive strength are tested; the concrete provided by the invention has the characteristics of strain hardening and multiple cracking, solves the problem of poor ductility of common concrete and lightweight concrete, has reasonable compressive strength and certain fluidity, uniformity and fiber dispersibility, and can be directly used in structural engineering.
本发明涉及一种轻质超高延性水泥基复合材料及设计方法、制备方法，基于颗粒堆积理论，利用修正后的A&A模型作为优化固体材料的目标曲线；绘制初步配合比的干粒分布PSD曲线，并与修正后的A&A模型曲线进行偏差对比，定性给出各组份的用量范围；基于微观力学分析，考虑玻璃微珠固有缺陷以及纤维体积分数影响，基于纤维桥接模型，判断各配比下材料是否具有应变硬化特性，并进一步优化配合比；使用后掺纤维法制备材料，并进行拉伸性能以及抗压强度等力学性能测试；本发明具有应变硬化以及多重开裂的特性，解决了普通混凝土以及轻质混凝土延性差的问题，具有合理的抗压强度以及一定的流动性、均匀性和纤维分散性，能够直接用于结构工程中。
Lightweight ultrahigh-ductility cement-based composite material as well as design method and preparation method thereof
一种轻质超高延性水泥基复合材料及设计方法、制备方法
WU CHANG (Autor:in) / SU YANLI (Autor:in) / XU MINGWEN (Autor:in) / WANG XINRU (Autor:in)
14.07.2023
Patent
Elektronische Ressource
Chinesisch
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High-ductility cement-based composite material and preparation method thereof
| Europäisches Patentamt | 2023