采用原子力显微镜评价集料的微纳观特征

Evaluation on Micro and Nano Scale Characteristics of Aggregate Based on Atomic Force Microscope Technology

关键词:  微纳观特征  原子力显微镜  表面纹理  黏附力  “散点式”分布  “整体式”分布

Key words:  micro and nano scale characteristic  atomic force microscope(AFM)  surface texture  adhesion force  scattered distribution  integral distribution

摘要:

为了研究石灰岩和玄武岩集料的微纳观特征，利用原子力显微镜（AFM）测试了其表面纹理与黏附力，并导入SPSS软件校验了数据的稳定性和区分度，对比分析了石灰岩与玄武岩集料在微纳观特征上的异同.结果表明：AFM可有效测试集料的表面纹理，数据稳定性强，区分度高，但测试集料的黏附力时，数据的随机性大，存在着一定的误差；石灰岩表面纹理粗糙、黏附力峰值较高、分布比较随机，与沥青之间的黏结呈“散点式”分布，而玄武岩表面纹理光滑、具有流纹结构，黏附力峰值较低、分布比较均匀，与沥青之间的黏结呈“整体式”分布.

Abstract:

In order to study the micro and nano scale characteristics of limestone and basalt aggregates, their surface texture and adhesion force were tested by atomic force microscope(AFM ) technology. The data were imported into the SPSS software to analyze their stability and distinguishability. Furthermore, the differences of the micro and nano scale characteristics of limestone and basalt aggregates were compared. Results show that the data stability and distinguishability for the surface texture are strong and high, while those for the adhesion force are random. Compared with the basalt, the maximum adhesion force value and surface texture roughness of the limestone are higher and coarser. The adhesion between limestone and asphalt is scattered distribution, while that between basalt and asphalt is integral distribution.