Determination of optimum ordinary Portland cement content in solidifying/stabilizing mineral sludge

• Main Authors: Ahmad R. (Author), Ali U.F.M (Author), Azhari A.W (Author), Azizan N.Z.N (Author), Dahalan F.A (Author), Ibrahim N. (Author), Kamarudzaman A.N (Author), Noor N.M (Author), Nurliyana, I. (Author), Rahim N. (Author), Ridwan F.M (Author), Yusof S.Y (Author)
• Format: Article
• Language: English
• Published: Institute of Physics Publishing, 2020
• Subjects: Air curing; Compressive strength; Curing; Land fill; Minerals; Mix proportions; Ordinary Portland cement; Portland cement; Sludge treatment; Waste acceptance criteria; Water treatment; Water treatment sludge
• Online Access: View Fulltext in Publisher; View in Scopus

 Binder plays important role in Solidification/Stabilisation (S/S) technique for sludge treatment. However, mineral sludge namely water treatment sludge (WTS) and ceramic sludge (CS) are rarely treated using S/S technique. Therefore, this study was conducted to obtain optimum percentage of Ordinary Portland Cement (OPC) content as a binder in S/S technique to treat the mineral sludge. Twenty (20) OPC mix proportions at 10% to 100% OPC with 10% increment were prepared to treat both 200 g WTS and 200 g CS. Binder-to-sludge (B/Sd) ratio of one (1) was used. Air curing was applied for all mixes. Compressive strength was conducted at 28 curing days. The compressive strength of treated mineral sludge was then compared to the requirement stipulated in Waste Acceptance Criteria in Landfill at 0.34 MPa. It was found that the optimum percentage of OPC to treat 200g WTS and 200g CS were 50% and 60% respectively. © Published under licence by IOP Publishing Ltd.