期刊：
Journal of Building Engineering,2025年105:112474 ISSN：2352-7102
通讯作者：
Li, ZP
作者机构：
[Gong, Jing; Liu, Jiesheng] Wuhan Polytech Univ, Sch Civil Engn & Architecture, Wuhan 430023, Peoples R China.;[Gong, Jing] Wuchang Univ Technol, Intelligent Construct Coll, Wuhan 430223, Peoples R China.;[Chen, Chaoqian] Int Water Resources & Hydropower Engn Construct Co, Wuhan 460050, Peoples R China.;[Li, Zhipeng; Li, ZP] Washington State Univ, Dept Civil & Environm Engn, Pullman, WA 99164 USA.;[Li, Zhipeng] CarbonSilvanus Co, Pullman, WA 99163 USA.
通讯机构：
[Li, ZP ] W;Washington State Univ, Dept Civil & Environm Engn, Pullman, WA 99164 USA.
关键词：
Class F fly ash;Municipal solid waste incineration fly ash (MSWIA);Mechanical strength;Deconvoluted Fourier transform infrared (FTIR) spectroscopy;Hydration products
摘要：
Class F fly ash (FA) is often limited in its application in the concrete industry due to its low hydration reactivity. This study explores the synergistic utilization of municipal solid waste incineration fly ash (MSWIA) and FA to valorize these two industrial waste streams for application in the concrete industry, aimed to reduce the carbon footprint associated with extensive cement use. The study proposes replacing part of the cement with MSWIA and Class F FA, with a baseline mix ratio of MSWIA: FA: Cement = 40 %:40 %:20 %. In addition, silica fume (SF), nano-montmorillonite (nMMT), and calcium oxide (CaO) were added to the system to modify and activate the binder, with the goal of meeting practical engineering requirements. Experimental results indicate that the optimal dosages are 15 % SF/(FA + MSWIA), 0.3 % nMMT/(FA + MSWIA), and 3 % CaO/(FA + MSWIA), achieving a 28-day compressive strength of 21.1 MPa, which represents an increase of 186 % compared with the control group. Furthermore, scanning electron microscopy (SEM), thermogravimetric analysis (TGA), X-ray diffraction (XRD), and deconvoluted Fourier transform infrared spectroscopy (FTIR) were used to investigate the effects of various variables on the microstructural morphology, hydration process, and hydration products of the paste samples. The results demonstrate that the addition of SF, nMMT, and CaO not only promotes the formation of highly polymerized hydration products, refines the pore structure, and improves the microstructural compactness but also significantly enhances the overall mechanical properties and durability of the cementitious system.
Class F fly ash (FA) is often limited in its application in the concrete industry due to its low hydration reactivity. This study explores the synergistic utilization of municipal solid waste incineration fly ash (MSWIA) and FA to valorize these two industrial waste streams for application in the concrete industry, aimed to reduce the carbon footprint associated with extensive cement use. The study proposes replacing part of the cement with MSWIA and Class F FA, with a baseline mix ratio of MSWIA: FA: Cement = 40 %:40 %:20 %. In addition, silica fume (SF), nano-montmorillonite (nMMT), and calcium oxide (CaO) were added to the system to modify and activate the binder, with the goal of meeting practical engineering requirements. Experimental results indicate that the optimal dosages are 15 % SF/(FA + MSWIA), 0.3 % nMMT/(FA + MSWIA), and 3 % CaO/(FA + MSWIA), achieving a 28-day compressive strength of 21.1 MPa, which represents an increase of 186 % compared with the control group. Furthermore, scanning electron microscopy (SEM), thermogravimetric analysis (TGA), X-ray diffraction (XRD), and deconvoluted Fourier transform infrared spectroscopy (FTIR) were used to investigate the effects of various variables on the microstructural morphology, hydration process, and hydration products of the paste samples. The results demonstrate that the addition of SF, nMMT, and CaO not only promotes the formation of highly polymerized hydration products, refines the pore structure, and improves the microstructural compactness but also significantly enhances the overall mechanical properties and durability of the cementitious system.
摘要：
Given the pressing threat of global warming, it is imperative to promote CO 2 emission reduction within the cement industry which is widely recognized as a major contributor to the overall carbon footprint. Limestone clay cement (LCC) emerges as a promising alternative to Portland cement. However, to facilitate the implementation of LCC technology, it is urgent to address the low early-age compressive strength issue. Inspired by the successful implementation of nano-engineered cementitious material, we hereby introduce a novel nanomaterial, graphene oxide (GO), into unconventional LCC paste (cement:clay:limestone = 65%:20%:15%, water/binder ratio: 0.45). Experimental results revealed that the 0.09% GO by weight of the LCC binder was the optimal dosage in this work, which improved the compressive strength of the LCC paste at 7, 14, and 28 days by 25.6, 21.6, and 20.3%, respectively. Advanced characterizations were then conducted, suggesting that the admixed GO not only enabled a higher polymerization degree of binder hydrates (which benefited the development of compressive strengths) but also improved the carbonation resistance of LCC paste. These findings not only offer valuable insights for researchers but also provide practical guidance for engineers in the field. Notably, the admixed GO converted the unstable orthorhombic crystal systemic aragonite to the stable trigonal crystal systemic calcite, which offers insights into the technology of carbon sequestration in concrete.
期刊：
Journal of Cleaner Production,2022年363:132533 ISSN：0959-6526
通讯作者：
Zhipeng Li
作者机构：
[Gong, Jing] Wuhan Polytech Univ, Sch Civil Engn & Architecture, Wuhan 430023, Peoples R China.;[Gong, Jing] Wuchang Univ Technol, Intelligent Construct Coll, Wuhan 430223, Peoples R China.;[Gong, Jing] Hunan Univ Sci & Technol, Sch Architecture & Art Design, Xiangtan 411201, Peoples R China.;[Yu, Lili] United Design Grp Co Ltd Xin Rui, Wuhan 430000, Peoples R China.;[Shi, Xianming; Li, Zhipeng] Washington State Univ, Natl Ctr Transportat Infrastructure Durabil & Life, Dept Civil & Environm Engn, POB 642910, Pullman, WA 99164 USA.
通讯机构：
[Zhipeng Li] N;National Center for Transportation Infrastructure Durability & Life-Extension, Department of Civil & Environmental Engineering, Washington State University, P.O. Box 642910, Pullman, WA, 99164-2910, United States
期刊：
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY,2021年21(5):3123-3133 ISSN：1533-4880
作者机构：
[Zhipeng Li; Liang Fan; Xianming Shi] Department of Civil & Environmental Engineering, Washington State University, Pullman, WA 99164-2910, USA;[Jing Zhong] Key Lab of Structure Dynamic Behavior and Control (Harbin Institute of Technology), Ministry of Education, Harbin 150090, Heilongjiang, China;[Zhuo Tang; Jing Gong] School of Civil Engineering and Architecture, Wuhan Polytechnic University, Wuhan 430023, China
摘要：
<jats:p>Foamed paste has attracted much attention because of its excellent thermal insulation performance and diverse applications in infrastructure projects. However, there are still some shortcomings hindering the further application of foamed paste, such as the low mechanical strength and
the lack of effective methods to evaluate the properties of foaming bubbles. In this study, surface tension was used as the key parameter to characterize the properties of bubbles. A novel nanomaterial, graphene oxide was employed to enhance the mechanical strength of foamed paste, which was
also effective in decreasing the surface tension of aqueous solution. A central composite design scheme was employed to evaluate the influence of three selected factors, surface tension, Sodium Phosphate/foaming reagents mass ratio, and graphene oxide/binder mass ratio, on the engineering
properties of foamed paste. Additionally, mercury intrusion porosimetry and scanning electron microscope were employed to elucidate the structure of pores, X-ray diffraction and thermogravimetric analysis were employed to further analyze the hydration products at the microscopic scale. This
study reveals that surface tension holds great potential in predicting the engineering properties or performances of foamed paste, and a new mechanism may be developed for explaining the influence of graphene oxide on the pore structure of cementitious materials by evaluating the surface tension
of pore solution.</jats:p>
摘要：
In cold climate regions, the energy associated with indoor heating constitutes a large portion of energy consumption. Increasing energy utilization efficiency is critically important for both economic and environmental reasons. Directly converting electrical energy to thermal energy using joule heating construction elements can save energy and investment to the water pipelines which have been extensively used for indoor heating in China. The fired brick has been extensively used to make pavements, walls and other masonry. Taking advantage of the high dispersion quality of graphene oxide (GO) in water, as well as the firing process used to make fired bricks, graphene nanocomposite bricks with excellent electrical properties and improved mechanical performance were prepared in China. The compressive strength of the bricks showed a substantial increase from 3.15 MPa to 7.21 MPa when GO concentration was 0.1 wt.%. Through applying 5 volts of electrical field within 5 minutes, the nanocomposites can be heated from room temperature to 60 degrees C, 110 degrees C and 160 degrees C for the nanocomposite bricks with graphene concentration of 3 wt.%, 4 wt.% and 5 wt.%, respectively, due to the extremely low percolation threshold (similar to 0.5 wt.%) and high conductivity (10 Omega<bold>cm at </bold>1 wt.%). The sheets were connected more tightly when the GO content was increased. The thermal efficiency can reach up to 88% based on the applied voltage, measured resistance and temperature rise curves.
期刊：
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY,2019年19(8):4465-4473 ISSN：1533-4880
通讯作者：
Shi, Xianming
作者机构：
[Gong, Jing; Li, Zhipeng; Zhang, Rongtang] Wuhan Polytech Univ, Sch Civil Engn & Architecture, Wuhan 430023, Hubei, Peoples R China.;[Gong, Jing] Wuchang Univ Technol, Coll Urban Construct, Wuhan 430223, Hubei, Peoples R China.;[Li, Jianfen] Wuhan Polytech Univ, Sch Chem Engn & Environm, Wuhan 430023, Hubei, Peoples R China.;[Shi, Xianming] Washington State Univ, Dept Civil & Environm Engn, Lab Adv & Sustainable Cementitious Mat, Pullman, WA 99164 USA.
通讯机构：
[Shi, Xianming] W;Washington State Univ, Dept Civil & Environm Engn, Lab Adv & Sustainable Cementitious Mat, Pullman, WA 99164 USA.
关键词：
High Volume Fly Ash;Polyethylene Microfiber;Nano-Montmorillonite;Interface;EDX;Microhardness
摘要：
Foamed cement-based materials have attracted much attention as a new type of thermal insulation materials (TIMs) that may offer a sustainable solution to the built environments. This laboratory study explores the combined use of nano-montmorillonite and polyethylene microfiber in foamed paste with high volume fly ash (HVFA) binder. A total of 16 foamed HVFA paste mixtures were fabricated which consisted of 70% Class F fly ash, 30% Portland cement, 2% sodium alpha-olefin sulfonate, 0.38% Na(3)PO(4), and 2% nano-montmorillonite. The dosage and type of polyethylene microfibers (90 mum in diameter) were explored in the present study, with six dosages (0, 0.1%, 0.2%, 0.3%, 0.4%, 0.5% by volume) and three lengths (3 mm, 6 mm, and 9 mm) tested. Based on the experimental results, the highest 28-day rupture strength (1.51 MPa) was achieved with the use of 3-mm long PE microfibers at 0.4 vol.%. Synergistic utilization of nMMT and microfibers exhibited a great influence on the dry density and water absorption of the foamed paste. The SEM micrographs illustrated the multiple mechanisms by which the microfibers serve to reduce shrinkage-induced cracking of the foamed paste. Energy-dispersive X-ray spectroscopy was employed to obtain the contents of Ca, Si, Al, S and mole ratios of Ca/Si, Ca/(Si + Al), S/Ca, and Al/Si in the hardened pastes, which reveal the difference in hydration products near or away from the nMMT-pretreated polyethylene microfibers. The results of microhardness test were also used to elucidate such nano-/micro-synergistic effects, which improved the bonding between microfibers and foamed paste matrix. A mechanism was proposed to explain the role of various admixtures and the balanced performance of such inorganic TIMs.
摘要：
Graphene oxide (GO) is increasingly used in various applications, and the implications of this nano-sized material entering the natural environment are of great interest. GO is highly soluble in water, and its accumulation in soil could significantly alter the physical and mechanical properties of the soil. In this laboratory study, we mixed GO with a soil (clayey sand, SC) to systematically study the engineering properties and microstructure of the modified soil. The experimental results reveal that the physical and mechanical properties and microstructure of clayey sand can be significantly changed by the addition of a minute quantity of GO. The liquid limit and plasticity index of the soil steadily increased (up to a GO concentration of 0.08 wt%), whereas the plastic limit did not change significantly. The addition of GO (up to 0.08 wt%) into the soil generally decreased the soil's void ratio under a given hydrostatic consolidation pressure, while increasing its undrained shear strength. Such remarkable modifications of soil by minute amounts of GO can be attributed to the extremely high specific surface area of GO and its stable dispersion in water.
摘要：
Controlling the water content in soil is crucial for the load bearing capacity of soil. In the past few decades, electroosmosis has been proved to be a versatile strategy to consolidate soil in situ. However, the efficiency of this electrochemical technique needs to be further improved for practical application. This study was designed to test the hypothesis that the incorporation of nanoparticles (NPs) during electroosmosis can significantly facilitate the migration of water molecules under an external electric field and thus improve the physical properties of the treated soil. In addition, the number of anodes per cathode was explored as another method to improve the efficiency of electroosmosis in dewatering and strengthening soil. The results from the designed laboratory experiments confirmed the benefits of increasing the number of anodes or adding positively charged SiO2@Al2O3 core–shell NPs, in increasing the dewatering rate and improving the cohesion, internal friction angle, and microstructure of the treated soil (Lake Silt). The finite element method based simulation results agreed well with the experimental observations and suggested that the NPs can promote the water migration under an electric field.
关键词：
Alternating pulse electric field;Calcium chloride;Electroosmosis;Reinforcement;Scanning electron microscopy;Weak soil
摘要：
Electroosmosis has been extensively employed as an effective method for the dewatering treatment of soils and thus the reinforcement of weak soils. At the microscopic level, this treatment process is inherently complex due to in situ chemical and electrochemical reactions, migration of ions and particles, and the dependence of zeta potential of various particles on the local pH value in the soil. This complexity has hindered further understanding of mechanisms underlying the electroosmosis technology. Here, we design an external electric field in which alternating pulse wave potentials were partially used to adjust the pH value of the soil and manipulate the dynamics of in situ formed nanoparticles and their interconnectivity. The experimental results reveal that the in situ formation of Ca-rich particles, instead of water drainage, may serve as the main mechanism underlying the observed soil reinforcement when using calcium chloride as the treatment electrolyte. The interconnectivity of such particles may be the key for the shear strength improvement without significant settlement of the soil.
期刊：
International Journal of Electrochemical Science,2016年11(7):6023-6042 ISSN：1452-3981
通讯作者：
Li, Yongxin;Shi, Xianming
作者机构：
[Wang, Dongmei; Xiao, Xiaoqing; Li, Yongxin] Anhui Normal Univ, Coll Chem & Mat Sci, Wuhu 241000, Peoples R China.;[Shi, Xianming] Washington State Univ, Dept Civil & Environm Engn, POB 642910, Pullman, WA 99164 USA.;[Shi, Xianming] Wuhan Polytech Univ, Sch Civil Engn & Architecture, Wuhan 430023, Peoples R China.;[Li, Yongxin; Shi, Xianming; Jackson, Emily; Xie, Ning; Zhang, Yan; Fang, Yida] Montana State Univ, Western Transportat Inst, Bozeman, MT 59717 USA.
通讯机构：
[Li, Yongxin] A;[Shi, Xianming] W;[Li, YX; Shi, XM] M;Anhui Normal Univ, Coll Chem & Mat Sci, Wuhu 241000, Peoples R China.;Washington State Univ, Dept Civil & Environm Engn, POB 642910, Pullman, WA 99164 USA.
摘要：
<jats:sec>
<jats:title content-type="abstract-heading">Purpose</jats:title>
<jats:p> – This paper aims to report the best practices of deicer corrosion control adopted by the Washington State Department of Transportation (WSDOT) to preserve the performance, reliability and value of its highway maintenance equipment assets. </jats:p>
</jats:sec>
<jats:sec>
<jats:title content-type="abstract-heading">Design/methodology/approach</jats:title>
<jats:p> – To enable quantitative analyses, data were collected from a site visit to WSDOT, as well as from a survey of maintenance practitioners from various transportation agencies. The direct costs related to equipment corrosion aggravated by the exposure to roadway deicers were analyzed, along with the direct benefits of mitigating such corrosion, using WSDOT as a case study. In addition, the same preliminary cost benefit analysis was conducted for an “average” Department of Transportation in a northern climate. </jats:p>
</jats:sec>
<jats:sec>
<jats:title content-type="abstract-heading">Findings</jats:title>
<jats:p> – Both cases show a highly favorable benefit-to-cost ratio for enhanced investment in controlling the risk of deicer corrosion. </jats:p>
</jats:sec>
<jats:sec>
<jats:title content-type="abstract-heading">Research limitations/implications</jats:title>
<jats:p> – It has not yet been possible to confirm this compelling argument because the analysis is partly based on assumptions instead of fully based on actual data. </jats:p>
</jats:sec>
<jats:sec>
<jats:title content-type="abstract-heading">Practical implications</jats:title>
<jats:p> – This work highlights the need to collect the relevant data such that future analysis and sensitivity analysis can be substantiated with actual data on costs and benefits. It concludes with a few suggestions for implementation. </jats:p>
</jats:sec>
<jats:sec>
<jats:title content-type="abstract-heading">Originality/value</jats:title>
<jats:p> – Many components in highway maintenance equipment fleet are at the risk of metallic corrosion, which is exacerbated in service environments where roadway deicers have been applied. This work lays the foundation for future research into this important issue.</jats:p>
</jats:sec>
摘要：
Anti-Corrosion coatings are extensively applied in maintenance and vehicles used by transportation agencies, which have been used to protect a substrate by providing a barrier between the metal and its environment outside, especially in a chloride-laden environments. In order to provide adequate corrosion protection, the coatings must be uniform, well adhered, pore free and self-healing for applications where physical damage to the coating may occur. The aim of this review is to examine the state of the corrosion coatings for the protection of various metals/alloys commonly used in maintenance equipment and vehicles, and to identify cost effective, high-performance corrosion inhibitors that may contribute to the preservation of equipment assets. The focus is placed on the metallic corrosion induced or aggravated by chlorides at ambient temperature and pressure, and near neutral pH (6-8).
作者：
Jing Gong;Jiang Huang;Shaowei Wang;Steve Soltesz;Xianming Shi
期刊：
Climatic Effects on Pavement and Geotechnical Infrastructure,2014年:66 - 77
作者机构：
Research Professor/Program Manager, Civil Engineering Department and Western Transportation Institute, Montana State University, P.O. Box 174250, Bozeman, MT 59717-4250. E-mail:;Principal, ITSNode LLC, 4520 Glenwood Dr., Bozeman, MT 59718. E-mail:;[Jing Gong] Associate Professor, School of Civil Engineering and Architecture, Wuhan Polytechnic University, Wuhan 430023, China. E-mail:;[Jiang Huang] Research Associate, Western Transportation Institute, P.O. Box 174250, Bozeman, MT 59717-4250. E-mail:;[Steve Soltesz] Research Engineer, Oregon Department of Transportation, Research Unit, 200 Hawthorne SE, Suite B-240, Salem, Oregon 97301-5192. E-mail:
会议时间：
8/4/13 12:00 AM
会议论文集名称：
Climatic Effects on Pavement and Geotechnical Infrastructure<&wdkj&>Climatic Effects on Pavement and Geotechnical Infrastructure<&wdkj&>Climatic Effects on Pavement and Geotechnical Infrastructure
摘要：
The use of ice control chemicals has become a crucial tool in providing a reasonable level of service on wintery roadways. Yet, there is little research on how the durability of concrete decks in cold climate might be affected by their exposure to deicers. This work presents a streamlined method of developing exposure maps that can be used to better understand the potential effects that deicer usage and other relevant variables may have on an agency's concrete infrastructure. Using the Oregon Department of Transportation (ODOT) as a case study, this work started with a survey of two relevant stakeholder groups, followed by the collection of relevant data for developing exposure maps for 12 selected representative ODOT concrete bridge decks. Some issues with data availability and quality were identified. It is recommended that deicer type and application rates, traffic volume, climatic conditions, and concrete mix design and rehabilitation data should be documented into an integrated deck preservation program, or be added to the existing bridge management systems. The inventory of such data would ultimately enable the agency to examine the role of various factors in the premature deterioration of its concrete bridge decks.
