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1. Stabilization/solidification on chromium (III) wastes by C3A and C3A hydrated matrix

Author:
Tan, Hongbo,   et al.   ; Li, Xiangguo; He, Chao; Bai, Yun; Ma, Baoguo; Wang, Guandong;     Show all 6 Authors
Source:
Journal of hazardous materials 2014 v.268 pp. 61-67
ISSN:
0304-3894
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; aluminum oxide; cement; chromium; energy; energy-dispersive X-ray analysis; heavy metals; leaching; nitric acid; scanning electron microscopy; solidification; sulfuric acid; toxic substances; wastes
Abstract:
... Hazardous wastes are usually used in the Portland cement production in order to save energy, costs and/or stabilize toxic substances and heavy metals inside the clinker. This work focus on the stabilization/solidification on chromium (III) wastes by C3A and C3A hydrated matrix. The immobilization rate of chromium in C3A and the leaching characteristics of the C3A hydrated matrixes containing chrom ...
DOI:
10.1016/j.jhazmat.2014.01.002

2. Effect of polyacrylic acid emulsion on fluidity of cement paste A Physicochemical and engineering aspects

Author:
Tan, Hongbo,   et al.   ; Guo, Yanfei; Ma, Baoguo; Zhi, Zhenzhen; Liu, Muyu; Jian, Shouwei; Guo, Yulin;     Show all 7 Authors
Source:
Colloids and surfaces 2017 v.535 pp. 139-148
ISSN:
0927-7757
Subject:
X-ray photoelectron spectroscopy; adsorption; calcium; cement; electrostatic interactions; emulsions; light scattering; lubrication; models; polyacrylic acid; rheology; spectrometers; zeta potential
Abstract:
... Polymer-modified cement-based materials (PMC) have been widely applied in civil construction and municipal projects. In order to obtain deeper insight into the workability of PMC, the effect of polyacrylic acid emulsion (PAE) on fluidity of cement paste was investigated in this study. The fluidity was assessed with mini slump, and the change of Ca²⁺ concentration in pore solution was tested with i ...
DOI:
10.1016/j.colsurfa.2017.09.039

3. Utilization of lithium slag by wet-grinding process to improve the early strength of sulphoaluminate cement paste

Author:
Tan, Hongbo,   et al.   ; Zhang, Xun; He, Xingyang; Guo, Yulin; Deng, Xiufeng; Su, Ying; Yang, Jin; Wang, Yingbin;     Show all 8 Authors
Source:
Journal of cleaner production 2018 v.205 pp. 536-551
ISSN:
0959-6526
Subject:
aluminum; carbonates; cement; grinding; industry; ions; lithium; nanoparticles; silicon; slags; solid wastes; sustainable development
Abstract:
... Lithium slag is a by-product of lithium carbonate industry; in the past decades, due to ascending demand of lithium salts, emission of this kind of solid waste is dramatically increased and results in serious environmental problem. Utilization of lithium slag is of great importance to the sustainable development of lithium carbonate industry. In this study, one new way to utilize lithium slag in s ...
DOI:
10.1016/j.jclepro.2018.09.027

4. New treatment technology: The use of wet-milling concrete slurry waste to substitute cement

Author:
Tan, Hongbo,   et al.   ; He, Xingyang; Zheng, Zhengqi; Ma, Mengyang; Su, Ying; Yang, Jin; Wang, Yingbin; Strnadel, Bohumír;     Show all 8 Authors
Source:
Journal of cleaner production 2020 v.242 pp. 118347
ISSN:
0959-6526
Subject:
carbon; cement; compression strength; concrete; energy; heat production; industry; mercury; microstructure; porosimetry; slurries; wastes; wet milling
Abstract:
... Concrete slurry waste is a dewatered solid residue generated from the production of concrete. The high discharging cost of concrete slurry waste strikes the concrete industry so that it is imperative to find an effective method to dispose concrete slurry waste. This study is conducted to utilise wet-milling to refine concrete slurry waste to partially replace the use of cement. In this method, con ...
DOI:
10.1016/j.jclepro.2019.118347

5. Preparation for micro-lithium slag via wet grinding and its application as accelerator in Portland cement

Author:
Tan, Hongbo,   et al.   ; Li, Maogao; He, Xingyang; Su, Ying; Zhang, Junjie; Pan, Han; Yang, Jin; Wang, Yingbin;     Show all 8 Authors
Source:
Journal of cleaner production 2020 v.250 pp. 119528
ISSN:
0959-6526
Subject:
X-ray diffraction; cement; compression strength; construction materials; differential thermal analysis; grinding; heat; industrial wastes; lithium; nuclear magnetic resonance spectroscopy; physicochemical properties; salts; scanning electron microscopy; slags; sustainable development; thermogravimetry
Abstract:
... Industrial wastes consumed by the preparation of building materials is a potential method to ensure the sustainable development. In this study, lithium slag (LS), as the by-product of lithium salts production, was treated by wet grinding process to prepare micro particles and used to expedite the early hydration of Portland cement (PC). The physical-chemical properties of micro-lithium slag (micro ...
DOI:
10.1016/j.jclepro.2019.119528

6. Cesium immobilization by K-struvite crystal in aqueous solution: Ab initio calculations and experiments

Author:
Tan, Hongbo,   et al.   ; Leng, Difei; Li, Xiangguo; Lv, Yang; Li, Neng; Liu, Zhuolin; Jiang, Wenguang; Jiang, Dongbing;     Show all 8 Authors
Source:
Journal of hazardous materials 2020 v.387 pp. 121872
ISSN:
0304-3894
Subject:
aqueous solutions; cations; cement; cesium; energy; fluorescence; liquids; magnesium; nuclides; phosphates; potassium; radioactive waste; solidification; spectrometers; spectroscopy
Abstract:
... The use of immobilization methods to treat radioactive nuclear waste liquid is one of the most effective ways for preventing radioactive contamination. Understanding the solidification matrix for the immobilization behavior of radioactive ions is ​​an important issue. In this work, ab initio calculation was used to study the solidification mechanism of Cs⁺ in K-struvite crystal in the aqueous solu ...
DOI:
10.1016/j.jhazmat.2019.121872

7. Utilization of solid waste high-volume calcium coal gangue in autoclaved aerated concrete: Physico-mechanical properties, hydration products and economic costs

Author:
Tan, HongBo,   et al.   ; Wu, RenDi; Dai, ShaoBin; Jian, ShouWei; Huang, Jun; Li, BaoDong;     Show all 6 Authors
Source:
Journal of cleaner production 2021 v.278 pp. 123416
ISSN:
0959-6526
Subject:
alkalinity; autoclaving; bulk density; calcium; cement; chemical composition; coal; compliance; compression strength; concrete; construction materials; economic costs; environmental hazards; fineness; foaming; gypsum; heat; heavy metals; recycling; sand; slurries; solid wastes; China
Abstract:
... Owing to the insufficient application of recycling methods, the overall amount of coal gangue (CG) has been increasing at a high rate in China. Therefore, development of an efficient method for the CG reuse in other fields has become a pressing issue. This study aims to discover an effective method for implementing an autoclaved process for the preparation of environmentally friendly and lightweig ...
DOI:
10.1016/j.jclepro.2020.123416

8. Nano particles prepared from hardened cement paste by wet grinding and its utilization as an accelerator in Portland cement

Author:
Tan, Hongbo,   et al.   ; Zhang, Junjie; He, Xingyang; Zhao, Rixu; Yang, Jin; Su, Ying;     Show all 6 Authors
Source:
Journal of cleaner production 2021 v.283 pp. 124632
ISSN:
0959-6526
Subject:
X-ray diffraction; cement; compression strength; ecosystem services; grinding; heat; mercury; nanoparticles; nuclear magnetic resonance spectroscopy; particle size; pastes; permeability; porosimetry; porosity; thermogravimetry; wastes
Abstract:
... Utilization of recycled powder (RP) from construction and demolition wastes into construction projects would bring great economic and environmental benefits. In this research, RP was prepared from hardened cement paste by wet grinding (i.e. WGRP) in the laboratory, and an attempt to utilize these nano particles as an accelerator for facilitating Portland cement (PC) hydration was done. The basic p ...
DOI:
10.1016/j.jclepro.2020.124632

9. Utilization of barium slag to improve chloride-binding ability of cement-based material

Author:
Tan, Hongbo,   et al.   ; Chen, Pian; Ma, Baoguo; Liu, Xiaohai; Zhang, Ting; Li, Chunbao; Yang, Qi; Luo, Zhongtao;     Show all 8 Authors
Source:
Journal of cleaner production 2021 v.283 pp. 124612
ISSN:
0959-6526
Subject:
X-ray diffraction; barium; cement; chlorides; compression strength; energy-dispersive X-ray analysis; gels; heat; nuclear magnetic resonance spectroscopy; pastes; slags; thermogravimetry
Abstract:
... In this study, barium slag (BS) was utilized as a supplementary cementitious material (SCM) to improve the chloride-binding ability of cement pastes. Hardened paste specimens with 0–30% BS content were prepared, and the chloride binding rate (CBR) was evaluated. The compressive strength was tested, and the hydration heat was assessed. The mechanism behind was investigated by XRD, TGA, NMR, EDS, an ...
DOI:
10.1016/j.jclepro.2020.124612