Synthesizing one-part geopolymers from rice husk ash. (15th October 2016)

• Record Type: Journal Article
• Authors: Sturm, P.; Gluth, G.J.G.; Brouwers, H.J.H.; Kühne, H.-C.
• Is Part Of: Construction & building materials. Volume 124(2016)
• Page Start: 961
• Page End: 966
• Publication Date: 2016-10-15
• Subjects: Alkali-activation -- Geopolymers -- One-part formulation -- Bio-based materials -- Rice husk ash; Building materials -- Periodicals; 624.18
• DOI: 10.1016/j.conbuildmat.2016.08.017
• Languages: English
• ISSNs: 0950-0618

Abstract

Abstract: One-part geopolymers offer advantages over conventional geopolymers with regard to handling and storage of feedstocks. However, they often suffer from a low degree of reaction, a high amount of crystalline byproducts, and consequently low strength. In this study, one-part geopolymers were produced from rice husk ash (RHA) and sodium aluminate, and investigated by XRD, ATR-FTIR, SEM and compressive strength testing. The compressive strength of the material was ∼30 MPa, i.e. significantly higher than for comparable one-part geopolymers. This is attributed to an almost complete reaction of the RHA and the absence of crystalline byproducts (zeolites) in the hardened geopolymer.