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Experimental investigation on freeze−thaw durability of polymer concrete

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 4,   Pages 1038-1046 doi: 10.1007/s11709-021-0748-2

Abstract: Assessing the durability of concrete is of prime importance to provide an adequate service life and reduceIn this study, the freeze–thaw resistance of polymer concrete containing different polymer contents wasResults showed that polymer concrete (PC) specimens prepared with higher dosages of polymer contentspossessed better freeze–thaw durability compared to other specimens.This high durability performance of PCs is mainly due to their impermeable microstructures, absence of

Keywords： durability test     freeze-thaw resistance     polymer concrete     residual compressive strength     ASTM C666-15    

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Enhancing compressive strength and durability of self-compacting concrete modified with controlled-burnt

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 2,   Pages 161-174 doi: 10.1007/s11709-021-0796-7

Abstract: Regarding durability, the 10%SBA + 30%BFS mix exhibited the lowest risk of corrosion.

Keywords： sugarcane bagasse ash     self-compacting concrete     compressive strength     sulfate resistance     water absorption    

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A new systematic firefly algorithm for forecasting the durability of reinforced recycled aggregate concrete

Wafaa Mohamed SHABAN; Khalid ELBAZ; Mohamed AMIN; Ayat gamal ASHOUR

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 3,   Pages 329-346 doi: 10.1007/s11709-022-0801-9

Abstract: This study presents a new systematic algorithm to optimize the durability of reinforced recycled aggregateconcrete.the firefly performance in forecasting the chloride penetrability of strengthened recycled aggregate concreteA dataset composite of nine effective parameters, including concrete components and fundamental characteristics

Keywords： chloride penetrability     recycled aggregate concrete     machine learning     concrete components     durability    

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Long-term durability of onshore coated concrete —chloride ion and carbonation effects

Seyedhamed SADATI,Mehdi K. MORADLLO,Mohammad SHEKARCHI

Frontiers of Structural and Civil Engineering 2016, Volume 10, Issue 2,   Pages 150-161 doi: 10.1007/s11709-016-0341-2

Abstract: Enhancing service life of reinforced concrete (RC) structures located in marine environments is an issueLong-term performance of concrete samples up to 88 months of exposure at natural marine environment wasTwo onshore exposure conditions, including soil and atmosphere and different types of concrete coatingsis proposed to use the aliphatic acrylic and polyurethane coatings for enhancing the service life of concrete

Keywords： carbonation     chloride ion     corrosion     service life     surface coating    

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Some Considerations on the Developments of Cement and Concrete

Tang Mingshu

Strategic Study of CAE 2002, Volume 4, Issue 1,   Pages 41-46

Abstract:

According to the cases of deterioration of big concrete structures investigated in Canada, it wasrepeatedly emphasized to pay attention to durability.The standards and compositions of cement should be reviewed on the basis of technical advances of concrete

Keywords： cement     concrete     durability     classification     standard    

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Degradation of permeability resistance of high strength concrete after combustion

LI Min, QIAN Chunxiang, KAO Hongtao

Frontiers of Structural and Civil Engineering 2008, Volume 2, Issue 3,   Pages 281-287 doi: 10.1007/s11709-008-0031-9

Abstract: To evaluate the remaining durability of concrete materials after combustion, the permeability of highstrength concrete (HSC) after combustion was studied.The transport behavior of chloride ion, water and air in concrete after combustion and the effect ofAfter the same temperature, the permeability coefficient of HSC is lower than that of normal strength concreteCombining changes of compressive strength and permeability, the remaining durability of concrete materials

Keywords： transport behavior     limestone     durability     permeability     HSC    

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Coupled diffusion of chloride and other ions in saturated concrete

Nattapong DAMRONGWIRIYANUPAP, Linyuan LI, Yunping XI

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 3,   Pages 267-277 doi: 10.1007/s11709-011-0112-z

Abstract: to chloride ions is one of the severe deterioration problems in long-term performance of reinforced concreteThe deterioration process is frequently found in marine concrete structures, highway pavements, and bridgesdiffusion of chloride ions is associated and strongly affected by other ions in the pore solution in concreteIn this paper, chloride penetration into concrete structures was mathematically characterized by the

Keywords： diffusion     chloride     concrete     Nernst-Planck equation     durability    

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Environmental Simulation Test Technology of Modern Concrete Structures

Li Yunfeng,Wu Shengxing

Strategic Study of CAE 2005, Volume 7, Issue 2,   Pages 81-85

Abstract:

In order to study durability, crack controlling of concrete structures and characteristics of concreteThe key techniques of environmental test of concrete structures are analyzed.Based on the research, environmental test of concrete durability and crack controlling will be better

Keywords： concrete structure     environmental test     durability     crack controlling     artificial climate    

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Influence of initial curing conditions and exposure environments on chloride migration in concrete using

Wen XUE, Weiliang JIN, Hiroshi YOKOTA,

Frontiers of Structural and Civil Engineering 2010, Volume 4, Issue 3,   Pages 348-353 doi: 10.1007/s11709-010-0077-3

Abstract: influence of initial curing conditions and exposure environments on chloride ions’ migration in concretereflected the density and pore connectivity of concrete.of the initial curing condition and following exposure environment should be taken into account in durabilitydesign for concrete structure located in marine environment.

Keywords： durability     effective diffusion coefficient     steady-state     migration test    

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Effect of Mineral Powder on the Durability of Mortar and Concrete

Feng Naiqian,Niu Quanlin,Feng Xiaoxin

Strategic Study of CAE 2002, Volume 4, Issue 2,   Pages 69-73

Abstract:

In this paper, the effect of mineral powder and W/B ratio on the charge passed with mortar and concreteFor the same W/B ratio and same content of mineral admixture, the charge passed through concrete is farThe charge passed data of either mortar or concrete with mineral admixture are lower than that of theThe charge passed of mortar and concrete decreases with the decrease of W/B and increase of curing age

Keywords： mineral powder     mortar     concrete     charge passed    

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A comprehensive assessment on the durability of gas diffusion electrode materials in PEM fuel cell stack

Arunkumar JAYAKUMAR

Frontiers in Energy 2019, Volume 13, Issue 2,   Pages 325-338 doi: 10.1007/s11708-019-0618-y

Abstract: Though it has found its applications in numerous fields, the cost and durability are key barriers impedingand functional properties of various materials involved in the GDE can help us to address the related durabilityThis paper reviews the key GDE components, and in specific, the root causes influencing the durabilityalso envisages the role of novel materials and provides a critical recommendation to improve the GDE durability

Keywords： PEM fuel cell     gas diffusion electrode(GDE)     gas diffusion layer(GDL)     membrane electrode assembly     durability    

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Fresh and hardened properties of high-performance fiber-reinforced concrete containing fly ash and rice

Nguyen-Trong HO; Viet Quoc DANG; Minh-Hieu NGUYEN; Chao-Lung HWANG; Trong-Phuoc HUYNH

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 12,   Pages 1621-1632 doi: 10.1007/s11709-022-0884-3

Abstract: Although fibers are used only infrequently as an additive in concrete in the construction industry, fiber-enhancedconcrete is known to provide a wide range of advantages over conventional concrete.study was to investigate the influences of fiber type and content on the mechanical properties and durabilityof high-performance fiber-reinforced concrete (HPFRC) designed using a novel densified mixture design

Keywords： high-performance fiber-reinforced concrete     fly ash     rice husk ash     durability     mechanical strength    

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Cement mortar with enhanced flexural strength and durability-related properties using

Qing LIU, Renjun LIU, Qiao WANG, Rui LIANG, Zongjin LI, Guoxing SUN

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 1,   Pages 99-108 doi: 10.1007/s11709-021-0721-0

Abstract: micro-and-pore structures, hydrated products, interactions between cement hydrates and polyacrylamide (PAM), and durability-related

Keywords： acrylamide     in situ polymerization     interaction     porosity     durability    

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additives and permeability reducing admixtures having different action mechanisms on mechanical and durability

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 action mechanisms on hardened state properties of cementitious systems containing mineral additives is examined. For this aim, three commercial PRAs were used during investigation. The effective parameters in the first and third PRAs were air-entraining and high-rate air-entraining, respectively. The second one contained the insoluble calcium carbonate residue and had a small amount of the air-entraining property. Mortar mixes with binary and ternary cementitious systems were prepared by partially replacing cement with fly ash and metakaolin. The hardened state properties of mortar mixtures such as compressive strength, ultrasonic pulse velocity, water absorption, drying shrinkage and freeze–thaw resistance were investigated. The ternary cement-based mixture having both fly ash and metakaolin was selected as the most successful mineral-additive bearing mix in regard to hardened state properties. In this sense, PRA-B, with both insoluble residues and a small amount of air-entraining properties, showed the best performance among the mixtures containing PRA. The combined use of mineral additive and PRA had a more positive effect on the properties of the mixes.

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

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Resistance to acid degradation, sorptivity, and setting time of geopolymer mortars

Osama A MOHAMED; Rania AL-KHATTAB; Waddah AL-HAWAT

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 6,   Pages 781-791 doi: 10.1007/s11709-022-0862-9

Abstract: Experimental evaluations were conducted to determine the water sorptivity, setting time, and resistance to a highly acidic environment, of mortar with alkali-activated ground granulated blast furnace slag (GBS) binder and also of combinations of fly ash and GBS binders. Binders were activated using mixtures of NaOH and Na2SiO3 solutions. The molarity of NaOH in the mixtures ranged from 10 mol·L−1 to 16 mol·L−1, and the Na2SiO3/NaOH ratio was varied from 1.5 to 2.5. Mortar samples were produced using three binder combinations: 1) GBS as the only binder; 2) blended binder with a slag-to-fly ash ratio of 3:1; and 3) mixed binder with 1:1 ratio of slag to fly ash. Mortar samples were mixed and cured at (22 ± 2) °C till the day of the test. The impact of activator solution alkalinity, activator ratio Na2SiO3/NaOH, GBS content on the rate of water absorption were evaluated. After 7, 28, and 90 d of immersion in a 10% sulfuric acid solution, the resistance of a geopolymer matrix to degradation was assessed by measuring the change in sample weight. The influence of solution alkalinity and relative fly ash content on setting times was investigated. Alkali-activated mortar with a slag-to-fly ash ratio of 3:1 had the least sorptivity compared to the two other binder combinations, at each curing age, and for mortars made with each of the NaOH alkaline activator concentrations. Mortar sorptivity decreased with age and sodium hydroxide concentrations, suggesting the production of geopolymerization products. No reduction in weight of sample occurred after immersion in the strong acid H2SO4 solution for three months, regardless of binder combination. This was due to the synthesis of hydration and geopolymerization products in the presence of curing water, which outweighed the degradation of the geopolymer matrix caused by sulfuric acid.

Keywords： alkali-activated materials     fly ash     sorptivity     durability of concrete     sodium hydroxide     sodium silicates    

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Title Author Date Type Operation

Experimental investigation on freeze−thaw durability of polymer concrete

Journal Article

Enhancing compressive strength and durability of self-compacting concrete modified with controlled-burnt

Journal Article

A new systematic firefly algorithm for forecasting the durability of reinforced recycled aggregate concrete

Wafaa Mohamed SHABAN; Khalid ELBAZ; Mohamed AMIN; Ayat gamal ASHOUR

Journal Article

Long-term durability of onshore coated concrete —chloride ion and carbonation effects

Seyedhamed SADATI,Mehdi K. MORADLLO,Mohammad SHEKARCHI

Journal Article

Some Considerations on the Developments of Cement and Concrete

Tang Mingshu

Journal Article

Degradation of permeability resistance of high strength concrete after combustion

LI Min, QIAN Chunxiang, KAO Hongtao

Journal Article

Coupled diffusion of chloride and other ions in saturated concrete

Nattapong DAMRONGWIRIYANUPAP, Linyuan LI, Yunping XI

Journal Article

Environmental Simulation Test Technology of Modern Concrete Structures

Li Yunfeng,Wu Shengxing

Journal Article

Influence of initial curing conditions and exposure environments on chloride migration in concrete using

Wen XUE, Weiliang JIN, Hiroshi YOKOTA,

Journal Article

Effect of Mineral Powder on the Durability of Mortar and Concrete

Feng Naiqian,Niu Quanlin,Feng Xiaoxin

Journal Article

A comprehensive assessment on the durability of gas diffusion electrode materials in PEM fuel cell stack

Arunkumar JAYAKUMAR

Journal Article

Fresh and hardened properties of high-performance fiber-reinforced concrete containing fly ash and rice

Nguyen-Trong HO; Viet Quoc DANG; Minh-Hieu NGUYEN; Chao-Lung HWANG; Trong-Phuoc HUYNH

Journal Article

Cement mortar with enhanced flexural strength and durability-related properties using

Qing LIU, Renjun LIU, Qiao WANG, Rui LIANG, Zongjin LI, Guoxing SUN

Journal Article

additives and permeability reducing admixtures having different action mechanisms on mechanical and durability

Journal Article

Resistance to acid degradation, sorptivity, and setting time of geopolymer mortars

Osama A MOHAMED; Rania AL-KHATTAB; Waddah AL-HAWAT

Journal Article