Microstructures, Mineral Compositions, and Mechanical Properties of Red-Layers in Southern China

Table 3

All mineral XRD test results.

Number	Sampling site	Sampling depth (m)	Lithology	Mineral type and content (%)						Total clay minerals (%)
				Quartz	Feldspar	Plagioclase	Calcite	Hematite	Barite
PKD01	Tiyu west road station	16	Moderately weathered red clay	47.2	—	14.5	—	2.8	—	35.5
PKD02	Zhujiang new city station	17.2–17.8	Red clay	45.7	—	10.9	—	3.5	—	39.9
PKD03	Wushan road station	12	Moderately to strongly weathered red clay	33.6	—	14.8	12.2	2.8	—	36.6
PKD04	Zhujiang new city station	18.1–19.0	Sandstone	27.7	—	5.4	21.1	5.7	—	40.1
PKD05	Kecun station	27.6	Red sandstone	44.1	8	6.1	7.4	1.4	—	33.0
PKD06	Tianhe station	16	Shield excavated soil	32.9	15.6	6.5	—		—	45.0