纳米材料的掺入对混凝土力学性能的影响

打开文本图片集

中图分类号：TQ178 文献标志码：A文章编号：1001-5922（2026）1-0135-04

Abstract：In this study，with the nano .SiO2 content fixed at 2.0% ，the mechanism of action of different steel fiber contents （0%～1.2% ）on the density，water absorption，workability，and mechanical properties of concrete was systematically investigated.The results showed that when the steel fiber content was 0.8% ，the apparent density reached a maximum value of 2，450.35kg/m3 ，while the water absorption was the lowest at a content of 0.6% . In terms of workability，the slump graduallydecreased with the increase of steel fiber content，with the maximum decrease reaching 34.62% .Mechanical property tests indicated that the compressve strength peaked at a steel fiber content of 0.8% ，and when the content was 1.0% ，the flexural strength and splitting tensile strength reached their maximum values of 7.45MPa and 4.67MPa ，respectively.Overall，a steel fiber content in the range of 0.8% ～ 1.0% can synergistically optimize the compactness，compressive strength，tensile strength，and flexural strengthof concrete，providing important reference for the mix ratio design of high-performance concrete.

Key words：nano .SiO2 ; steel fiber;slag base polymer concrete ;mechanical properties;compound doping effect

传统混凝土在抗拉强度、抗裂性能等方面存在固有缺陷，难以满足现代工程结构的需求[1-2]。（剩余5433字）