Journal of Cleaner Production
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2024
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IF 9.7
Zhangsong Jiang,Guichun He,Yan Shi,Yilong Duan,Yue Lin,Yinmei Jiang
Although solid waste is a good raw material for preparing foam ceramics , the mechanisms of the discrepancies in different solid wastes affecting the properties of foam ceramics remain unelucidated. In this study, the properties of tin tailings-based foam ceramics with different proportions of waste glass (WG) or scheelite tailings (ST) were measured. Significant discrepancies in the influence effects were observed, with higher closed porosity for added WG and higher apparent porosity for added ST. To interpret this phenomenon, the effects of the main fluxing agents of the ST and WG were investigated, and the results indicated that their influence effects were controlled by the type and content of the fluxing agent. Furthermore, the structure and crystalline phase of foam ceramics demonstrated that their compressive strength was jointly driven by their microstructure and crystal phases, but other properties depended only on the microstructure. The pore size and type were significantly affected by the change in liquid phase characteristics and aluminosilicate , with the addition of WG dramatically decreasing the number of pore windows and the addition of ST increasing the content of anorthite. Further sintering process analysis results revealed that the chemical reactions in materials change with chemical compositions, which resulted in significant differences in the crystalline compositions of the foam ceramics for WG and ST additions, and the presence of WG obviously reduced the formation temperature of the liquid phase. Overall, our research provides a theoretical basis for better utilizing different solid wastes to prepare foam ceramics.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
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2025
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IF 8
Juncheng Wen,Yan Wan,Yingzi Yang
Most durability issues in cement-based materials stem from water intrusion, which can be mitigated by hydrophobic materials with excellent waterproofing properties. This study proposes a green wet chemical method using stearic acid (SA) and waste glass powder (WGP) to synthesize hydrophobic WGP (HWGP). The effect of SA dosage on the water contact angle of HWGP was investigated, and the optimal SA dosage for preparing HWGP was determined through TG analysis. XRD, FTIR, XPS, and TEM tests revealed the synthesis mechanism of HWGP. The effects of HWGP on mortar's mechanical properties, water and frost resistance were also studied, and the optimal dosage of HWGP for preparing hydrophobic mortar was determined. The results show that 8 % SA is optimal for preparing HWGP, and its water contact angle is 132.2°. The synthesis occurs through reactions between SA and Na + , Ca 2+ , and Si-OH groups, with the long carbon chains of SA grafted onto WGP, forming a hydrophobic layer about 4 nm thick. As HWGP content increases, compressive strength initially increases and then decreases, while water and frost resistance improve significantly. The optimal dosage for preparing hydrophobic mortar is 15 % HWGP, where compressive strength decreases by only 6.9 %, flexural strength increases by 12.5 %, and water contact angle increases by 91.2°. Additionally, initial and secondary water absorption rates decrease by 79.4 % and 92.2 %, respectively, total water absorption amount over 8d decreases by 64.9 %, and frost resistance improves by 70.9 %.
研究领域:
建筑材料
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化学工程
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土木工程
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DOI
高影响因子
Journal of Cleaner Production
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2021
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IF 9.297
Chong Fu,Jianwei Liang,Gao Yang,Abd alwahed Dagestani,Wei Liu,Xudong Luo,Baobao Zeng,Haidong Wu,Meipeng Huang,Lifu Lin,Xin Deng
With rapid economic development in recent years, the efficient utilization of waste glass has received increasing attention. The major challenge is to improve the economic and social benefits of waste glass recycling and to improve the self-driving force of waste glass recycling in related industries. In this paper, the researchers proposed a new recycling strategy for waste glass, using low-cost waste glass powder as raw material to prepare light-weight and high-strength porous ceramic materials with self-cleaning properties by combining the emulsion template self-assembly method with a surface hydrophobic coating treatment technology. The open porosity of the prepared ceramics can be controlled at 50–70% and the ceramics have ultra-high compressive strength (i.e., 50–141 MPa). The water contact angle on its surface is as high as 162.2°, which affords remarkable anti-dirt properties, stability, and superhydrophobic performance for milk, coffee, beer, soy sauce, and other staining liquids. Moreover, the water contact angle remains unchanged at a high temperature (500 °C) and in an acid-base environment. More importantly, even if the hydrophobic coating on the surface is destroyed, the superhydrophobicity and self-cleaning ability of the ceramic materials can be restored after remodification and the reuse is excellent. Ceramic materials offer the advantages of low price, a simple process, environmental protection, and high energy efficiency, and they show great potential and broad prospects for application. At the same time, the proposed method provides a very effective way to comprehensively utilize waste glass and has remarkable economic and social benefits.
研究领域:
材料科学
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环境科学
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化学工程
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DOI
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
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2022
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IF 7.693
Chuanqiang Li,Haobo Wang,Chaoliang Fu,Shaosong Shi,Quan Liu,Peixin Xu,Qizheng Liu,Dan Zhou,Ying Cheng,Lin Jiang
The loss of adhesion is one of the primary mechanisms of water damage in asphalt mixes containing waste glass powders (WGPs), which is mainly attributed to the smooth surface of the glass may undermine the bitumen–aggregate adhesion and accelerate the stripping. In this study, the WGPs surface was roughened by different types and content of silane coupling agent (SCA), and the surface modification mechanism was illustrated based on the chemical reaction process. Then the adsorption capacity of WGPs on SCA was studied through UV–vis tests, and the effects of the SCA on the chemical composition of WGP and asphalt were investigated by FT-IR tests. At the same time, the adhesion performance between modified WGPs and asphalt was studied by the sessile drop test and column wicking test. Furthermore, the immersion Marshall tests were completed to study the water stability of the asphalt mixture after the replacement of filler with modified WGPs. Results show that the optimal modified time of WGPs is 75 min. During the modified process, a ≡Si-O-Si≡ skeleton structure is generated between the SCA and WGPs, and the amino group in SCA reacts with the carboxylic acid of the asphalt to form a new chemical bond. In addition, adding 10 % KH550 SCA to modify the WGPs will provide the most superior improvement for the adhesion work, stripping work and water stability.
研究领域:
材料科学
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土木工程
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DOI
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
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2024
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IF 7.4
Zhangsong Jiang,Guichun He,Yinmei Jiang,Hongyu Zhao,Yilong Duan,Guodong Yuan,Hang Fu
Although wolframite tailings (WT) and high-borosilicate waste glass (HBWG) pose irreversible hazards to the environment, these have not been utilized effectively. In this study, ceramic foams (CFs) were prepared synergistically by a high-temperature foaming method using WT and HBWG as the primary raw materials and SiC as the foaming agent. The result showed that the raw materials composed of 60 wt% WT and 40 wt% HBWG can yield CFs with a compressive strength of 3.75 MPa, a bulk density of 0.792 g/cm 3 , a water absorption of 5.53 %, an apparent porosity of 4.38 %, and an average pore size of 0.832 mm. These can be used as cost-effective build materials. Furthermore, the effects of the sintering temperature, holding time, SiC content, and WT proportion on the structures, crystalline phases, and properties of the CFs were investigated. The results revealed that all the influencing factors had significant effects on the macrostructure, microstructure, and properties of the CFs. Meanwhile, the corresponding crystalline phases were influenced only by the sintering temperature and WT proportion. Further analysis indicated that the WT proportion is one of the key factors affecting the properties of CFs. These properties can be predicted effectively by a deep learning model. Overall, our research has provided an effective approach for high-value utilization of WT and HBWG.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
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2022
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IF 7.693
Hongwei Li,Rui Wang,Wei Zhao,Hongwei Guo,Bingji Yan,Peng Li
Lightweight glass-ceramic foams as novel building and decoration materials exhibit great advantages. Herein, fluorite tailings and waste glass were recycled to sinter glass-ceramic foams by introducing calcined kaolin and calcium phosphate. The effects of calcium phosphate addition and sintering temperature on the crystalline phase, microstructure evolution, fluoride leaching performance and physical properties of the glass-ceramic foams were systematically investigated using X-ray diffraction, scanning electron microscopy, energy dispersive spectroscopy, Fourier transform infrared spectra, computed tomography, and differential scanning calorimetry. The obtained glass-ceramic foams sintered at 1110 °C exhibited relatively homogeneous pore sizes and distributions, low densities and thermal conductivities, and high compressive strengths. Moreover, the addition of calcium phosphate promoted the formation of fluorapatite, which benefited the toxic fluorine stabilization in the glass-ceramic foams. Thermodynamic data were calculated using Factsage 8.1 and verified through experiments to establish the physical structure transition during sintering. This study provides an efficient utilization route to convert fluorite tailings and waste glass into stable and valuable lightweight glass-ceramic foams.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Ziwei Chen,Weiyi Ji,Xiangping Xian,S. Thomas Ng,Chi Sun Poon
Vitrification technology is an effective solution for rapid stabilization and resource utilization of heavy metal-containing hazardous waste. Waste soda-lime-silica (SLS) glass is an abundantly available vitrification flux and can contribute to the sustainable waste-treating-waste strategy. Understanding the interactions between the SLS glass network and heavy metals is vital for optimizing the vitrified composition systems. This study adopted molecular dynamics simulations and various experimental techniques to comprehensively elucidate the immobilization mechanism of the representative heavy metal ion of Pb 2+ in SLS glass. Our results indicated Pb ions were incorporated into the glass matrix primarily as three forms, namely, [PbO 3 ] triangles, [PbO 4 ] tetrahedra, and highly coordinated [PbO n ] ( n > 4) polyhedra. With the increasing amount of Pb ions immobilized, the dominant role of Pb ions transformed from the network modifiers of highly coordinated [PbO n ] units to the network formers of [PbO 3 ] and [PbO 4 ] units. As a result, the degree of network polymerization first decreased and then increased with the turning point of 7.5 wt% PbO content. Different from regular [SiO 4 ] tetrahedra, the [PbO 3 ] and [PbO 4 ] units were less stable and prone to deformation, resulting in the small inter-polyhedral bond angle Pb-O-Si. The structural transformations significantly affected the macroscopic thermal and chemical stability of the vitrification products. Generally, the vitrification products with a PbO content of below 11 wt% were allowed to be recycled in construction materials according to the Chinese standard. This study has a high value for tuning vitrification chemistry and developing green Pb-containing vitrification materials.
研究领域:
材料科学
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环境工程
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固态化学
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废物处理
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分子模拟
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）