Use of the Accumulated Waste of the Pulp and Paper Industry as a Component Raw Material for the Production of Cements

Objects of Accumulated Environmental Damage as Raw-Material Base for Building Materials Manufacture

“…One of such research trends can be the publicly held corporation "BPPM" sludge depository colloidal sludge-lignin possible recovery study with the aim to produce α-alumina, as one of the components for producing corrosion-resistant hydraulic cement [18]. The colloidal sludge-lignin sediments recovery possibility with obtaining α -alumina is due to the fact that a large amount of aluminum hydroxide is included in the sludge-lignin composition.…”

“…With an increase in the sediment depth, the aluminum content increases to 25 -28 % (Fig. 1) [17,18]. To obtain cement clinker, in addition to aluminum oxide, which increases the hardening rate, lowers the sintering temperature, increases strength, it is also necessary to have components that increase the corrosion resistance and also possess astringent properties.…”

“…To study the obtained material component composition, an analysis was carried out on the basis of the X-ray diffractometry method using a BRUKER D8 ADVANCE instrument at the "Vinogradov Institute of Geochemistry Siberian Branch of the Russian Academy of Sciences" (Fig. 2) [17,18]. According to Figure 2, calcium sulphate -CaSO4 has the best substance effect, followed by calcium sulfoaluminate Ca4(Al6O12) SO4 (according to the hardening rate of cement and an expanding additive), the third in content is Ca10 (SiO4) 3(SO4)3F2 (increases the strength of cement).…”