Low-Alkali Fly Ash Cement and Method of Making
Samples can be manufactured by using simple techniques like cold pressing, and at a relatively low stress (~17MPa)Strengthening can be achieved by adding low concentrations of alkali (<0.05M NaOH and Na2CO3)NaOH activates the compositions faster as compared to Na2CO3 samples; thus, activation kinetics can be regulated by using suitable activators
An environmentally friendly replacement to high-alkali fly ash cements
Researchers at the University of North Dakota have developed a low-alkali fly ash cement (LAFAC) that possesses greater compressive strength than non-alkali fly ash cements (prepared using only water) and high-alkali fly ash cements, while lacking the disadvantages associated with high levels of alkali, specifically the use of NaOH as an alkali activator, which produces harmful Cl2 and HCl gasses as byproducts.
Patent Number: US20150007751A1
Application Number: US13935078A
Inventor: Gupta, Surojit | Riyad, M. Faisal
Priority Date: 3 Jul 2013
Priority Number: US20150007751A1
Application Date: 3 Jul 2013
Publication Date: 8 Jan 2015
IPC Current: C04B000726 | C04B001400
US Class: 106624 | 106640 | 106705 | 106707 | 106710 | 264119
Assignee Applicant: University of North Dakota,Grand Forks
Title: LOW-ALKALI FLY ASH CEMENT AND METHOD OF MAKING
Usefulness: LOW-ALKALI FLY ASH CEMENT AND METHOD OF MAKING
Summary: Preparation of low-alkali fly ash cement (claimed).
Novelty: Preparation of low-alkali fly ash cement involves forming mixture of class C fly ash and aqueous solution comprising alkali at specified molar concentration, and forming low-alkali fly ash cement from mixture
Chemical/Material
Chemical/Material Application
USA
