Synergistic effect of dry sludge from waste wash water of concrete plants and zeolitic by-product on the properties of ternary blended ordinary Portland cements
Data
2020Autorius
Vaičiukynienė, Danutė
Pundienė, Ina
Kantautas, Aras
Augonis, Algirdas
Janavičius, Eugenijus
Vaičiukynas, Vilimantas
Alobeid, Jihad
Metaduomenys
Rodyti detalų aprašąSantrauka
This paper analyses the use of two types of supplementary cementing materials, – dry sludge from waste wash water of concrete plants and zeolitic by-product – for producing hardened cement paste specimens. X-ray powder diffraction, scanning electronic microscopy, energy-dispersive X-ray spectroscopy, and thermal analysis were used as investigation methods. Test results showed that the addition of dry sludge reduced the compressive strength of hardened cement paste at both 7 and 28 days. In hardened cement paste specimens where Portland cement was substituted with 5 %–30% of dry sludge the compressive strength decreased significantly after 7 and 28 at days. After 28 days blended Portland cement containing up to 10% of supplementary cementing materials ((SCM) - dry sludge and zeolitic by-product) demonstrated higher compressive strength than the reference specimen as a result of synergistic interactions, whereas higher replacement levels led to reduction in compressive strength.