Recycling of industrial waste phosphogypsum for producing no-cement mortar

Abstract: 104 | PDF: 79

##plugins.themes.academic_pro.article.main##

Author

  • Huynh Trong Phuoc*, Do Ngoc Duy, Bui Le Anh Tuan

Keywords:

Phosphogypsum
no-cement mortar
carbide slag
compressive strength
microstructure

Abstract

The present study aims to investigate the possibility of recycling phosphogypsum (PG), which is a by-product of the fertilizer industry, for producing no-cement mortar (NCM). The PG powder was mixed with ground granulated blast furnace slag (GGBFS), carbide slag (CS), calcium hydroxide (CH) at different compositions to prepare the NCM samples for the investigation. A systematical evaluation about characteristics of the NCM was reported at both fresh and hardened stages, including flowability, setting time, unit weight, and compressive strength. Additionally, microstructural properties of the NCMsamples were examined using advanced analysis techniques of a scanning electron microscope (SEM) and X-ray diffraction (XRD). Furthermore, a cost analysis was also performed to show the capability of the real application. The test results show great potential for utilizing the above materials for the production of NCM with properties that meet the requirements for real practice.

References

    [1] Perez-Lopez R., Macias F., Canovas C.R., Sarmiento A.M., Perez-Moreno S.M. Pollutant flows from a phosphogypsum disposal area to an estuarine environment: an insight from geochemical signatures. Science of The Total Environment, 2016; 553: 42–51.
    [2] Shen Y., Qian J., Chai J., Fan Y. Calcium sulphoaluminate cements made with phosphogypsum production issues and material properties. Cement and Concrete Composites, 2014; 48: 67–74.
    [3] Cuadri A.A., Navarro F.J., Garcia-Morales M., Bolivar J.P. Valorization of phosphogypsum waste as asphaltic bitumen modifier. Journal of Hazardous Materials, 2014; 279: 11–16.
    [4] Yang F., Li G.X., Shi H., Wang Y.M. Effects of phosphogypsum and superphosphate on compost maturity and gaseous emissions during kitchen waste composting. Waste Management,2015; 36: 70–76.
    [5] Altun I.A., Sert Y. Utilization of weathered phosphogypsum as set retarder in Portland cement. Cement and Concrete Research, 2004;34: 677–680.
    [6] Zhou J., Yu D., Shu Z., Li T., Chen Y., Wang Y. A novel two-step hydration process of preparing cement-free non-fired bricks from waste phosphogypsum. Construction and Building Materials, 2014; 73: 222–228.
    [7] ASTM C1437, Standard test method for flow of hydrauliccement mortar, 2015.
    [8] ASTM C807Standard test method for time of setting of hydraulic cement mortar by modified Vicat needle,2010.
    [9] ASTM C138, Standard test method for density (Unit weight), yield, and air content (gravimetric) of concrete, 2017.
    [10] ASTM C109, Standard test method for compressive strength of hydraulic cement mortars, 2007.
    [11] Hwang C.L., Huynh T.P. Characteristics of alkali-activated controlled low-strength material derived from red mud-slag blends. Key Engineering Materials, 2017; 753: 343–348.
Read more

##plugins.themes.academic_pro.article.sidebar##

Published

Jan 31, 2019
Download
PDF
How to Cite
Huynh Trong Phuoc*, Do Ngoc Duy, Bui Le Anh Tuan. “Recycling of Industrial Waste Phosphogypsum for Producing No-Cement Mortar”. The University of Danang - Journal of Science and Technology, vol. 17, no. 1.2, Jan. 2019, pp. 32-36, https://jst-ud.vn/jst-ud/article/view/1558.

##plugins.themes.academic_pro.article.details##