| Title |
Cement systems containing dry sludge from waste water concrete plants / |
| Translation of Title |
Cemento sistemos, kuriose yra betono gamyklų nuotekinio vandens sauso dumblo. |
| Authors |
Alobeid, Jihad |
| Full Text |
|
| Pages |
61 |
| Keywords [eng] |
sludge ; waste water ; portland cement ; zeolitic ; concrete |
| Abstract [eng] |
Binders hold a big amounts of supplementary cementing materials (SCM) have been a subject of interest for many years. So it is possible to decrease the amount of Portland cement in binder composition, and in consequence reduce the negative influence of cement production on the environment. Reducing the consumption of Portland cement with simultaneous recycling by-product materials is important to eschew wastage and the environmental problem. This work connected with the using of the dry sludge from waste water concrete plants for fabricate the hardened cement paste and concrete specimens. X-ray powder diffraction, survey the electronic microscopy, energy-dispersive X-ray spectroscopy, the porosity and flexural strength of full absorption water and density as investigation methods was used. The compressive strength of specimens was measured at day 7 and 28. In the first chapter it was shown that the addendum of sludge reduced the compressive strength of hardened cement paste at both 7 and 28 days. In the hardened cement paste specimen by substituting of Portland cement with 5 - 30% of sludge the compressive strength decreases. The zeolitic and sludge waste blended Portland cement containing up to 10% of supplementary cementing materials SCM obtained a big average or similar compressive strength as the reference specimen after 28 days, while higher replacement levels lead to a downsizing in compressive strength. |
| Dissertation Institution |
Kauno technologijos universitetas. |
| Type |
Master thesis |
| Language |
English |
| Publication date |
2019 |
