古代人工烧制石灰的判别方法研究

STUDY ON IDENTIFICATION OF ANCIENT MAN-MADE LIME

采用X射线衍射和红外光谱分析法对天然石灰石、人工烧制石灰以及采自汉代和明代遗址的古代白灰进行分析,研究人工烧制石灰的判别方法。结果表明,人工煅烧天然石灰石形成的石灰,其碳化产物v_2/v_4值大于天然石灰石;随着研磨程度的增加,人工烧制石灰碳化产物的v_2-v_4趋势线斜率也明显高于天然石灰石,从而可作为判别人工烧制石灰的简便方法。据此,对汉代和明代遗址出土的古代白灰进行分析,此方法对古代人工烧制石灰的判别及石灰制作技术的研究具有重要意义。

Archaeological lime samples from sites in Han dynasty and Ming dynasty, natural limestone and the experimentally man-made lime were investigated by means of X-ray diffractometry and Fourier transform infrared spectrometry （FTIR） to study the way of identifying the ancient man-made lime. The results show that v2/v4 ratio of products resulted from carbonation reaction of man-made lime is higher than that of natural limestone; with additional grinding, the trend lines of v2 versus v4 for carbonation products of the man-made lime have a steeper slope when compared to natural limestone, which can be recognized as a simple method for identifying the ancient man-made lime. According to these results, archaeological lime samples from sites in Han dynasty and Ming dynasty may be carbonized by man-made lime. Therefore, it has great significance for studyies on the ancient man-made lime and the production technology of lime.