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Effect of nonionic side chain length of polycarboxylate-ether-based high-range water-reducing admixture

Süleyman ÖZEN, Muhammet Gökhan ALTUN, Ali MARDANI-AGHABAGLOU, Kambiz RAMYAR

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 6,   Pages 1573-1582 doi: 10.1007/s11709-020-0680-x

Abstract: Despite the large variations in the behaviors of water-reducing admixtures upon changes in their structureson the structure of the admixture.In this study, three different polycarboxylate-ether-based water-reducing admixtures with the same freeThe water-reducing admixtures having long or short side chains reduced the initial flow characteristicswater absorption capacity of the mortar mixtures and mini-slump performances of the cement paste mixtures

Keywords: water-reducing admixture     side chain length     cement paste     fluidity     compressive strength    

The application of polycarboxylates water-reducing admixture to passenger dedicated line engineering

Huang Zhijiu

Strategic Study of CAE 2009, Volume 11, Issue 1,   Pages 75-80

Abstract:

Polycarboxylates water-reducing admixture possesses the capability whichProblems of engineering application of polycarboxylates water-reducing admixtures were analyzed.

Keywords: polycarboxylate water-reducing admixtures     compatibility of cement     quality retention     high performance    

Effect of mineral additives and permeability reducing admixtures having different action mechanisms on

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 5,   Pages 1277-1291 doi: 10.1007/s11709-021-1752-2

Abstract: In this paper, the effect of usage of the permeability reducing admixture (PRA) having different actionhardened state properties of mortar mixtures such as compressive strength, ultrasonic pulse velocity, water

Keywords: cementitious system     mineral additive     permeability reducing admixture     mechanical properties     durability    

Feasibility of crack free reinforced concrete bridge deck from materials composition perspective: a state of the art review

Mahdi AREZOUMANDI

Frontiers of Structural and Civil Engineering 2015, Volume 9, Issue 1,   Pages 91-103 doi: 10.1007/s11709-015-0274-1

Abstract: Early age cracking on bridge deck has been the subject of many studies for years. Cracking is a major concern because it leads to premature deterioration of structures. Millions of dollars spent to repair the cracked bridge decks each year. To design an appropriate mixture for crack free bridge deck, it is important to study previous researches. This paper presents a comprehensive literature review of the performance of different materials compositions as well as methods have been used to reduce and control bridge deck cracks. Different material compositions and methods are discussed in terms of their performances as well as advantages and disadvantages.

Keywords: bridge deck     crack     fiber     shrinkage     shrinkage reducing admixture    

An experimental study for optimization of high range water reducing superplasticizer in self compacting

Rahul DUBEY, Pardeep KUMAR

Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 1,   Pages 62-71 doi: 10.1007/s11709-013-0192-z

Abstract: Concrete is extensively used construction material in the infrastructure development industry. With increase in technical knowhow, the need of research for high performance concretes such as self-compacting concrete (SCC) has increased in the last decade. The adaptability of SCC is due to its fluidic behavior in fresh state. However, to develop SCC using indigenous materials, the lack of standardized mix design procedures is the biggest impediment. Although with the advent of chemical admixtures, it is possible to achieve concrete with high fluidity, but at the same time durability issues require more attention. To have these fresh state properties SCC mixes are typically designed with high powder contents, and chemical admixtures. Proportioning and optimization of these materials is a key issue in the mix design of SCC. This paper focuses mainly on experimental study to optimize dosages of superplasticizer for mortar of SCC and then in concrete mixture itself.

Keywords: self-compacting concrete (SCC)     fresh properties     superplasticizer     optimization     compressive strength    

Chemical additives affect sulfate reducing bacteria biofilm properties adsorbed on stainless steel 316Lsurface in circulating cooling water system

Yu Qi,Jin Li,Rui Liang,Sitong Ji,Jianxiang Li,Meng Liu

Frontiers of Environmental Science & Engineering 2017, Volume 11, Issue 2, doi: 10.1007/s11783-017-0917-7

Abstract: This paper studied the biofilm properties and corrosion behavior of sulfate reducing bacteria (SRB) onstainless steel 316L (SS316L) surface in circulating cooling water system with and without additives

Keywords: Sulfate reducing bacteria (SRB)     Chemical additives     Biofilm     Extracellular polymeric substance (EPS)     Microbe    

Reductant-assisted polydopamine-modified membranes for efficient water purification

Feng Sun, Jinren Lu, Yuhong Wang, Jie Xiong, Congjie Gao, Jia Xu

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 1,   Pages 109-117 doi: 10.1007/s11705-020-1987-9

Abstract: In this study, polydopamine self-polymerisation was controlled by adjusting its reducing environmentThe polydopamine coating formed in the reducing environment facilitated excellent water transport performancewith a water permeance of approximately 400 L·m ·h ·bar as well as efficient organic foulant removalboth excellent chemical stability and anti-microbial activity, demonstrating the contribution of the reducingIt shows significant potential for use in water purification.

Keywords: membrane     water purification     polydopamine     reducing environment     self-polymerization control    

Online control of biofilm and reducing carbon dosage in denitrifying biofilter: pilot and full-scale

Xiuhong Liu, Hongchen Wang, Qing Yang, Jianmin Li, Yuankai Zhang, Yongzhen Peng

Frontiers of Environmental Science & Engineering 2017, Volume 11, Issue 1, doi: 10.1007/s11783-017-0895-9

Abstract: Online control of DNBF was studied in the pilot-scale and full-scale experiments. DNBF was controlled by the online monitored effluent nitrate and turbidity. The effluent nitrate lower than 3 mg·L and saving 18% of carbon were both achieved. Denitrifying biofilter (DNBF) is widely used for advanced nitrogen removal in the reclaimed wastewater treatment plants (RWWTPs). Manual control of DNBF easily led to unstable process performance and high cost. Consequently, there is a need to automatic control of two decisive operational processes, carbon dosage and backwash, in DNBF. In this study, online control of DNBF was investigated in the pilot-scale DNBF (600 m ·d ), and then applied in the full-scale DNBF (10 × 104 m3·d ). A novel simple online control strategy for carbon dosage with the effluent nitrate as the sole control parameter was designed and tested in the pilot-scale DNBF. Backwash operation was optimized based on the backwash control strategy using turbidity as control parameter. Using the integrated control strategy, in the pilot-scale DNBF, highly efficient nitrate removal with effluent TN level lower than 3 mg·L was achieved and DNBF was not clogged any more. The online control strategy for carbon dosage was successfully applied in a RWWTP. Using the online control strategy, the effluent nitrate concentration was controlled relatively stable and carbon dosage was saved for 18%.

Keywords: Reclaimed water treatment     Denitrifying biofilter     Carbon dosage     Backwash control    

Can crop science really help us to produce more better-quality food while reducing the world-wide environmental

William J. DAVIES, Susan E. WARD, Alan WILSON

Frontiers of Agricultural Science and Engineering 2020, Volume 7, Issue 1,   Pages 28-44 doi: 10.15302/J-FASE-2019299

Abstract: We discuss novel approaches at both the plant and the crop level that will enhance nutrient and water

Keywords: food security     environmental sustainability     crop water use efficiency     crop science     diet and health    

Reducing Fiber Technic for 3D Braiding Hollow Coneshaped Fabric

Zhu Jianxun

Strategic Study of CAE 2006, Volume 8, Issue 3,   Pages 66-69

Abstract:

Reducing-fiber technics of 3D hollow coneshaped fabric braided from big end are researched,includingrow-directional reducing-fiber technic, annulus-directional reducing-fiber technic, reducing-fiber technicReducing-fiber technic by thinning fiber is a kind of special annulus-directional reducing-fiber technic

Keywords: 3D braiding     hollow coneshaped fabric     reducing-fiber technic by reducing carrier     reducing-fiber technic    

Removal of Cu(II) and Fe(III) from aqueous solutions by dead sulfate reducing bacteria

Hong’en QUAN, He BAI, Yang HAN, Yong KANG, Jiao SUN

Frontiers of Chemical Science and Engineering 2013, Volume 7, Issue 2,   Pages 177-184 doi: 10.1007/s11705-013-1324-7

Abstract: The biosorption properties of dead sulfate reducing bacteria (SRB) for the removal of Cu(II) and Fe(III

Keywords: sulfate reducing bacteria     biosorption     Cu(II)     Fe(III)    

On Reducing Investments of Metro Construction in China

Shi Zhongheng

Strategic Study of CAE 2001, Volume 3, Issue 1,   Pages 36-39

Abstract: technology, reliable in safety, economical in investment and practical in functions, the possibilities for reducingmetro construction costs are analysed, and the following tentative suggestions for reducing metro construction

Keywords: metro construction     investments     reducing    

Promoting green transformation by ensuring food security while reducing the environmental footprint of EDITORIAL

Frontiers of Agricultural Science and Engineering 2024, Volume 11, Issue 1,   Pages 1-4 doi: 10.15302/J-FASE-2024549

Abstract:

Reconciling the challenges of producing adequate amounts of nutritious food for the increasing global population while limiting environmental damage that can result from operations of our food systems is an enormous challenge. In many parts of the world, agriculture is undergoing major transformations and this has been and still is particularly the case in China. In many countries, historical increases in food production have largely been achieved by increasing inputs of a range of resources, resulting in increased environmental footprints of the food produced. Agricultural development in China has resulted in unprecedented environmental degradation. Demand for food in China remains high and with an emphasis on national self-sufficiency in production of many food crops. There is an urgent need for the development of productive and more environmentally-friendly agricultural systems and improved environmental-economic-social resilience.

Keywords: development     transformation food security    

Transportation: meeting the dual challenges of achieving energy security and reducing greenhouse gas

Michael Quanlu WANG, Hong HUO

Frontiers in Energy 2009, Volume 3, Issue 2,   Pages 212-225 doi: 10.1007/s11708-009-0016-y

Abstract: As the population and economy continue to grow globally, demand for energy will continue to grow. The transportation sector relies solely on petroleum for its energy supply. The United States and China are the top two oil-importing countries. A major issue both countries face and are addressing is energy insecurity as a result of the demand for liquid fuels. Improvements in the energy efficiency of vehicles and the substitution of petroleum fuels with alternative fuels can help contain growth in the demand for transportation oil. Although most alternative transportation fuels - when applied to advanced vehicle technologies - can substantially reduce greenhouse emissions, coal-based liquid fuels may increase greenhouse gas emissions by twice as much as gasoline. Such technologies as carbon capture and storage may need to be employed to manage the greenhouse gas emissions of coal-based fuels. At present, there is no ideal transportation fuel option to solve problems related to transportation energy and greenhouse gas emissions. To solve these problems, research and development efforts are needed for a variety of transportation fuel options and advanced vehicle technologies.

Keywords: transportation energy     energy security     greenhouse gases     alternative fuels     vehicle technologies    

Capacity estimation and preliminary strategy for reducing the release of dioxins in China

YU Gang, ZHANG Qing, HUANG Jun, CAI Zhenxiao, SUI Qian

Frontiers of Environmental Science & Engineering 2007, Volume 1, Issue 1,   Pages 13-17 doi: 10.1007/s11783-007-0002-8

Abstract: The strategy and action plan for reducing the release of dioxins in China are the most important componentsHow about the capacity for reducing the dioxins release from the key sources?

Keywords: GIS     difference     capacity     scenario     implementation    

Title Author Date Type Operation

Effect of nonionic side chain length of polycarboxylate-ether-based high-range water-reducing admixture

Süleyman ÖZEN, Muhammet Gökhan ALTUN, Ali MARDANI-AGHABAGLOU, Kambiz RAMYAR

Journal Article

The application of polycarboxylates water-reducing admixture to passenger dedicated line engineering

Huang Zhijiu

Journal Article

Effect of mineral additives and permeability reducing admixtures having different action mechanisms on

Journal Article

Feasibility of crack free reinforced concrete bridge deck from materials composition perspective: a state of the art review

Mahdi AREZOUMANDI

Journal Article

An experimental study for optimization of high range water reducing superplasticizer in self compacting

Rahul DUBEY, Pardeep KUMAR

Journal Article

Chemical additives affect sulfate reducing bacteria biofilm properties adsorbed on stainless steel 316Lsurface in circulating cooling water system

Yu Qi,Jin Li,Rui Liang,Sitong Ji,Jianxiang Li,Meng Liu

Journal Article

Reductant-assisted polydopamine-modified membranes for efficient water purification

Feng Sun, Jinren Lu, Yuhong Wang, Jie Xiong, Congjie Gao, Jia Xu

Journal Article

Online control of biofilm and reducing carbon dosage in denitrifying biofilter: pilot and full-scale

Xiuhong Liu, Hongchen Wang, Qing Yang, Jianmin Li, Yuankai Zhang, Yongzhen Peng

Journal Article

Can crop science really help us to produce more better-quality food while reducing the world-wide environmental

William J. DAVIES, Susan E. WARD, Alan WILSON

Journal Article

Reducing Fiber Technic for 3D Braiding Hollow Coneshaped Fabric

Zhu Jianxun

Journal Article

Removal of Cu(II) and Fe(III) from aqueous solutions by dead sulfate reducing bacteria

Hong’en QUAN, He BAI, Yang HAN, Yong KANG, Jiao SUN

Journal Article

On Reducing Investments of Metro Construction in China

Shi Zhongheng

Journal Article

Promoting green transformation by ensuring food security while reducing the environmental footprint of

Journal Article

Transportation: meeting the dual challenges of achieving energy security and reducing greenhouse gas

Michael Quanlu WANG, Hong HUO

Journal Article

Capacity estimation and preliminary strategy for reducing the release of dioxins in China

YU Gang, ZHANG Qing, HUANG Jun, CAI Zhenxiao, SUI Qian

Journal Article