Heat treatment of concrete products and structures: issues of strength and efficiencies

Abstract

The article describes the study of the possibility of heliothermic treatment of concrete products in the climatic conditions of a particular region. Sufficient intensity of solar radiation in the summer months, including the observed significant clouds accompanied by precipitation, allows establishing a thermal regime in the solar cells of the covering type, which provides the required strength set for shipment during the day. The subsequent tests showed high strength characteristics of the manufactured products of samples whose numerical values are not inferior to those obtained by traditional heat treatment. The introduction of solar thermal treatment in the production of concrete products will save energy for 180-200 R/m3 of products.

Determination of rational parameters for heat treatment of concrete mixture based on a hollow aluminosilicate microsphere

“…It is proposed to ensure partial removal of excess moisture from the structured system at the pre-aging stage without destruction. A number of works proved that moisture removal from the structured system within 8-10 % of the mixing water will have a positive effect on hydration processes [15,16]. Under normal conditions of holding for two hours, 4-5 % of water is removed from a concrete mixture based on a hollow aluminosilicate microsphere, with a volumetric shrinkage of 11-14 % of the value at 28 days of age.…”