After necessary excavations and earthwork were done, the grade of under foundation is set. Then, 10 cm. height blinding concrete is laid.
Английский Язык - Английский Язык
Определение blinding concrete в Английский Язык Английский Язык словарь
(Mimarlık) A layer of dry lean concrete about 50mm thick covering the bottom of an excavation, either over hardcore or directly on the foundation, to seal the underlying material and prevent mud from dirtying the reinforcement bars or intruding into the concrete of footings