Heading 2523

Portland cement, aluminous cement (ciment fondu), slag cement, supersulphate cement and similar hydraulic cements, whether or not coloured or in the form of clinkers

252310 Cement clinkers (whether or not coloured) 252321 Cement; portland, white, whether or not artificially coloured 252329 Cement; portland, other than white, whether or not artificially coloured 252330 Cement; aluminous (ciment fondu), whether or not coloured or in the form of clinkers 252390 Cement; hydraulic kinds n.e.c. in heading no. 2523