期刊论文

Wang, Jingsong

英文

Construction and Building Materials

0950-0618

2021

268

121081

10.1016/j.conbuildmat.2020.121081

The geopolymer specimen with the highest compressive strength was selected for XRD characterization. At the same time, according to different Na+ and H2O content of geopolymer molecular model, simulated XRD patterns were analyzed respectively. Actual and simulated XRD pattern are plotted in Fig. 3. Fig. 3a illustrated that a wide X-ray diffraction peak appears at the range of 2 theta from 12 to 40°. Compared XRD pattern of geopolymer and calcined coal gangue, it was found that the position of

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The aim of this work is to study the impacts of Na+ and H2O on structural and mechanical properties of coal gangue-based geopolymer by experiment and molecular dynamics. Geopolymers were prepared by coal gangue and mixed solution of NaOH and water glass. Then X-ray fluorescence (XRF) and X-ray diffraction (XRD) were utilized to characterize the main chemical composition and crystalline phase of geopolymer after 28d curing. Moreover, Na2Si2O5 glass was firstly proposed to establish the molecular structure of geopolymers with different Na/Al and H2O/Al. Structural optimization and molecular dyna...