Section 05 Mineral products 25 Salt; sulphur; earths and stone; plastering materials, lime and cement 25 23 Portland cement, aluminous cement, slag cement, supersulphate cement and similar hydraulic cements, whether or not coloured or in the form of clinkers 25 23 30 Aluminous cement 25 23 30 00 Aluminous cement Commodity Code Description 25 23 30 00 000 Aluminous cement