Vietnam expects to import about 5Mt of clinker this year, up 11 per cent on year, to meet the increasing demand from domestic plants, an industry executive said Tuesday.   "We expect a total domestic demand of 28Mt of cement this year, up from 26Mt last year, therefore (we) will need to import more clinker this year," said the state-owned Vietnam Cement Corp executive, who didn’t want to be named.  Government figures show that the country produced 25.3Mt of cement last year, up 8.8 per cent on year, of which foreign-invested firms produced 7.4Mt, up seven per cent on year.  Published under Cement News