title: Improving the properties of geopolymer containing oil-contaminated clay, metakaolin, and blast furnace slag by applying nano-SiO2.
abstract: In this study, geopolymer specimens based on calcined oil-contaminated clays (OCCs), metakaolin replacements of OCCs, and blast furnace slag were manufactured by the addition of nano-SiO2to improve their properties. The effects of adding 0, 1, 2, or 3% nano-SiO2on the properties and microstructures of the geopolymer specimens were determined using compressive strength tests, flow tests, setting time tests, scanning electron microscopy (SEM), and silicon nuclear magnetic resonance spectroscopy (Si-NMR). The results showed that the setting time and flowability of the geopolymer specimens decreased and the compressive strength increased as the amount of nano-SiO2increased. These results were supported by the SEM and Si-NMR assays. This study suggests that the addition of nano-SiO2was beneficial and improved the properties of the geopolymer specimens containing calcined OCC.
authors.affiliation: a Department of Civil and Ecological Engineering , I-Shou University , Kaohsiung City , Taiwan, ROC.
authors.forename: Huan-Lin
authors.initials: HL
authors.lastname: Luo
authors.affiliation: a Department of Civil and Ecological Engineering , I-Shou University , Kaohsiung City , Taiwan, ROC.
authors.forename: Deng-Fong
authors.initials: DF
authors.lastname: Lin
authors.affiliation: a Department of Civil and Ecological Engineering , I-Shou University , Kaohsiung City , Taiwan, ROC.
authors.forename: Shih-Chieh
authors.initials: SC
authors.lastname: Chen
mesh_terms: D019245:Compressive Strength; D007220:Industrial Waste; D007616:Kaolin / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D008855:Microscopy, Electron, Scanning; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D009821:Oils / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D012822:Silicon Dioxide / Q000737:chemistry*
chemical_list: D007220:Industrial Waste; D009821:Oils; D011108:Polymers; D007616:Kaolin; D012822:Silicon Dioxide
keywords: Geopolymer; metakaolin; nano-material; oil-contaminated clay