High-Strength Ceramsite Made with Sludge and Low-Quality Fly Ash

Yang, Zhenghong; Song, Wenjuan; Yang, Jinbao; Deng, Lei; Cao, Zhen; Mei-lun, Shi

doi:10.1061/(asce)mt.1943-5533.0000775

Cited by 16 publications

(3 citation statements)

References 8 publications

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“…This is most likely due to the fact that the existence of BN impedes the cross-linking of DS during the calcination process at high temperature. The compression strength of BN-DS-7 is ∼9 MPa, which is similar to the strength of ceramsite, suggesting that the structure of BN-DS-7 is strong and stable. As far as we know, this is first report where a BN-DS composite with a specific ratio can float on the surface of water.…”

Section: Resultsmentioning

confidence: 99%

Dredged-Sediment-Promoted Synthesis of Boron-Nitride-Based Floating Photocatalyst with Photodegradation of Neutral Red under Ultraviolet-Light Irradiation

Guo

Wang

et al. 2018

ACS Appl. Mater. Interfaces

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A novel floating photocatalyst (BN-DS-7) has been successfully synthesized by calcining the mixture of boron nitride (BN) and dredged sediment (DS) with a specific mass ratio (3:7) at 1100 °C for a half hour. BN is synthesized for the first time using an oxygen-limited method, which consists of a nanoplate ∼30 nm in size and has a bandgap at 3.94 eV. The as-synthesized BN can degrade NR under ultraviolet (UV) light irradiation. For BN-DS-7, X-ray photoelectron spectroscopy analysis suggests that BN mainly interacts with DS through the strong coordination between these N atoms in BN and these Si and Al atoms in DS. This leads to BN-DS-7 having good compression strength (∼9 MPa). Thermogravimetric analysis for BN shows that a few BN (∼13%) synthesized via an oxygen-limited method will pyrolyze at 1100 °C and the released gas can be sealed in the inside of DS at 1100 °C, resulting in that BN-DS-7 can float on the water surface. Photodegradation results show that BN-DS-7 can degrade 84% of NR (20 mg/L) under UV-light irradiation for 5 h, and the active species are •OH and photoinduced hole. Total organic carbon analysis for NR solution before and after photodegradation show that ∼70% of NR has been mineralized into inorganic carbons. This work is helpful to develop a new type of BN-based floating material and enlarge the application field of DS.

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Section: Resultsmentioning

confidence: 99%

Dredged-Sediment-Promoted Synthesis of Boron-Nitride-Based Floating Photocatalyst with Photodegradation of Neutral Red under Ultraviolet-Light Irradiation

Guo

Wang

et al. 2018

ACS Appl. Mater. Interfaces

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“…e sintering temperature in this study is mainly determined by reference to the sintering temperature of the high-temperature sintered clay ceramsite, and the sintering time ranges from 6 to 15 minutes [18]. e presintering experimental design is shown in Table 4, and the results of the presintering experiment are shown in Table 5.…”

Section: Dsm Ceramsite Presintering Experimentmentioning

confidence: 99%

A Study on Ceramsite Production Using Dredging Sea Mud and Its Biofilm Formation Capacity Evaluation

Xia

Xiao

et al. 2018

Advances in Civil Engineering

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Dredging sea mud produced during the coastal infrastructure construction has been gradually becoming an environmental problem in China. Making ceramsite is an attractive way to convert the waste sea mud to resources used for many industrial sectors. However, the imapct of preheating and sintering conditions on the ceramsite properties and the biofilm formation capacity of the ceramsite are still poorly understood. This study aims to fill these knowledge gaps. Results suggested the optimal conditions for the preheating temperature was 350°C, the preheating time was 15 min, the sintering temperature was 1040°C, and the sintering time was 9 min. The dredging sea mud-derived ceramsite showed better biofilm formation capacity with high COD and NH4+-N removal performance compared with the commercial ceramsites. The content of the chloride ion in the ceramist granules is close to zero, and the low cost of this material, implying this dredging sea mud-derived ceramsite, could be an engineering favorable material for using it as a biocarrier in the real application.

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“…Furthermore, its economic efficiency is significant when used in structures with large self-weight. Lightweight aggregate includes the pumice, tuff industrial lightweight aggregate, such as slag, 1 fly ash ceramsite, 2 coal gangue 3 artificial lightweight aggregate, such as shale ceramsite, 4 clay ceramsite, 5 expanded perlite. 6 The glazed hollow bead [7][8][9][10] insulation concrete (GHBIC) employed in this study uses glazed hollow bead as lightweight aggregate.…”

Section: Introductionmentioning

confidence: 99%

Flexural performance of glazed hollow bead reinforced concrete beams

Zhang

Liu

et al. 2015

Journal of Reinforced Plastics and Composites

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Flexural static tests are conducted on glazed hollow bead reinforced concrete beams (referred to as GBLs) with a range of properties. The test variables included concrete material type and cross section depth as well as longitudinal reinforcement ratio of the flexural beams. The test results were analyzed in terms of damage mechanism, ductility, stiffness, and energy dissipation in the flexural beam. The addition of the glazed hollow bead as the lightweight aggregate was to obtain higher ductility and slower degradation of strength and stiffness. It was shown in the tests that the mechanical properties of the GBLs were better than that of normal concrete beams. A finite element model was developed for the beams and the lateral force-displacement curves obtained from analyses were compared with the experimental data. The results of this study are useful in the design and application of glazed hollow bead insulation concrete bending members.

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High-Strength Ceramsite Made with Sludge and Low-Quality Fly Ash

Cited by 16 publications

References 8 publications

Dredged-Sediment-Promoted Synthesis of Boron-Nitride-Based Floating Photocatalyst with Photodegradation of Neutral Red under Ultraviolet-Light Irradiation

Dredged-Sediment-Promoted Synthesis of Boron-Nitride-Based Floating Photocatalyst with Photodegradation of Neutral Red under Ultraviolet-Light Irradiation

A Study on Ceramsite Production Using Dredging Sea Mud and Its Biofilm Formation Capacity Evaluation

Flexural performance of glazed hollow bead reinforced concrete beams

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