This article presents the effect of LaSrCoO_3, oxides commonly known as LSCO nanomaterials, on rheological, mechanical and microstructural properties of self-compacting concrete (SCC). LSCO nanomaterials contents of 1–4 wt% are considered in this study. Compressive, flexural and split tensile strengths of SCC mixes are evaluated at curing ages of 7, 28, and 90 days. The effect of LSCO nanomaterials on the microstructures of above concretes is also evaluated using Fourier transform infrared spectroscopy, scanning electron microscopy, X-ray diffraction, thermogravimetric analysis techniques, Williamson–Hall equation, and X-Powder software. Results show that workability of SCC mixes decrease with increase in LSCO nanomaterials. Increases are observed in compressive, flexural and split tensile strengths in SCC mixes when LSCO nanomaterials contents increase up to 2 wt%, followed by a decreasing trend which indicate 2 wt% as being the optimum amount. The microstructural analysis by means of various techniques also revels compact microstructure of cement matrix in SCC mixes containing 2 wt% LSCO nanomaterials, confirming the results of mechanical properties.

中文翻译：

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钙钛矿纳米材料自密实混凝土流变、力学和微观结构性能的实验研究

本文介绍了LaSrCoO _{3 的效果，}氧化物通常称为 LSCO 纳米材料，对自密实混凝土 (SCC) 的流变、力学和微观结构性能的影响。本研究考虑了 1-4 wt% 的 LSCO 纳米材料含量。在 7、28 和 90 天的固化年龄下评估 SCC 混合物的压缩、弯曲和分裂拉伸强度。还使用傅里叶变换红外光谱、扫描电子显微镜、X 射线衍射、热重分析技术、Williamson-Hall 方程和 X-Powder 软件评估了 LSCO 纳米材料对上述混凝土微观结构的影响。结果表明，SCC 混合物的可加工性随着 LSCO 纳米材料的增加而降低。当 LSCO 纳米材料含量增加到 2 wt% 时，SCC 混合物中的压缩、弯曲和分裂拉伸强度会增加，随后呈下降趋势，表明 2 wt% 是最佳用量。通过各种技术进行的微观结构分析还揭示了含有 2 wt% LSCO 纳米材料的 SCC 混合物中水泥基体的致密微观结构，证实了力学性能的结果。