Foam concrete from Portland cement clinker and natural mineral raw materials of the Arctic zone of Russia

Wall materials of stable quality are required for the construction of facilities in the Arctic zone of Russia. Portland cement-based foam concretes produced by co-grinding imported clinker with local active mineral additives were developed to meet this requirement. Using quartz-feldspar sand as an additive makes it possible to obtain non-autoclave foam concrete with an average density class D600 and a compressive strength variation coefficient reduced from 15.62 % (for foam concrete based on additive-free cement) to 5.59 %. In the manufacture of D800 Portland cement-based foam concrete with zeolite added, the compressive strength variation coefficient is reduced from 12.11 to 4.30 %. With Portland cement and these additives, the foam concrete class in terms of compressive strength increases to B1.5 and B2.5, respectively. Foam concrete with a thermal conductivity of 0.109- 0.111 W/(m · K), total shrinkage of 2.2-2.6 mm/m, the vapor permeability coefficient of 0.14-0.15 mg/(m · h · Pa), and an F25 — F35 frost resistance grade was obtained, meeting the requirements of GOST 25485–89.

Author: A.Y. Mestnikov, A.I. Kudyakov, V.N. Rozhin

Section: Concrete

Keywords: foam concrete, Portland cement clinker, active mineral additives, cement with mineral additives, quartz-feldspar sand, zeolite, foam concrete mixture, monodisperse pore distribution, density, strength, freeze-thaw resistance, thermal conductivity