Investigations of semi-dry pressed concretes made on ultra-fine sands of a local quarry

Abstract

Investigations of semi-dry pressed concretes made on ultra-fine sands of a local quarry

Romanenko I.I., Petrovna I.N., Romanenko M.I

Incoming article date: 08.05.2019

The use of ultrathin sand as the main raw material in the production of concrete made by semi-dry molding is relevant for many regions of Russia due to the lack of sand with a high modulus of grain size and solid stone. The article presents the results of the analysis of the possible use of sands with a modulus of particle size Mcr = 0.8-1.4 in pressed small-sized concrete paving products for sidewalks. Replacing ordinary sand up to 80% with fine-grained does not reduce strength and performance properties. The transition to fine-grained and silty sands reduces the cost of production.

Keywords: concrete, semi-dry pressing, knitting, ultra-fine sand, hyper-plasticizer, strength