Gypsum blocks produced from TiO2 production by-products. Issue 9 (2nd May 2016)

• Record Type: Journal Article
• Authors: Zhang, Yihe; Wang, Fan; Huang, Hongwei; Guo, Yuxi; Li, Baoying; Liu, Yangyang; Chu, Paul K.
• Is Part Of: Environmental technology. Volume 37:Issue 9(2016)
• Page Start: 1094
• Page End: 1100
• Publication Date: 2016-05-02
• Subjects: Titanium gypsum -- industrial wastes -- recycling -- building materials -- gypsum blocks; Environmental engineering -- Periodicals; Environmental protection -- Periodicals; 628.05
• DOI: 10.1080/09593330.2015.1102329
• Languages: English
• ISSNs: 0959-3330

Abstract

ABSTRACT: Calcined titanium gypsum was investigated by the ways of XRD (powder X-ray diffraction), XRF (X-ray fluorescence) and TG-DTA (thermogravimetric–differential thermal analyses). It was employed as raw material for making lightweight materials. The influence of cement, amount of water/solid (W/S) ratio, water-reducing agent, citric acid content and the hydration age on the gypsum blocks was investigated. The results showed that the optimum W/S ratio, cement content and water-reducing agent are 0.9, 10% and 2 wt% for the calcined gypsum from titanium gypsum, respectively. The 5.96 MPa was attained after 7 days of ageing. It was also found that the citric acid is inappropriate to be used in the production of gypsum blocks from TiO2 production by-products.