Analytical review of research on the technology of light aggregates based on natural and man-made raw materials

Abstract

The article presents modern research on the development of compositions and technologies of light aggregates based on natural and man-made raw materials, as well as mixtures containing both natural and man-made raw materials. As a natural raw material component, shungite, clays, silica – containing raw materials-diatomite, trepel and flask are used. As man-made raw materials, coal-enrichment waste and coal-containing waste, fly ash, ash slags, oil sludge and paper waste paper are used. Light aggregate is prepared according to roasting, clinker-free and clinker-free technologies. For the production of the aggregate according to the firing technology, the raw materials are mixed after grinding, mixed in certain ratios, moistened, prepared granules and after drying, the granules are fired. Liquid glass is used to produce the aggregate using the clinker-free technology, while Portland cement, slag-Portland cement and gypsum-cement-pozzolan binder can be used as binders using the clinker technology. The bulk density of the developed aggregates is in the range of 100 ... 1100 kg / m3, porosity-50...88%, compressive strength in the cylinder-0.32...3 MPa.