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Compressive behavior and microstructure of concrete mixed with natural seawater and sea sand

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 6,   Pages 1347-1357 doi: 10.1007/s11709-021-0780-2

Abstract: Noncorrosive reinforcement materials facilitate producing structural concrete with seawater and sea sandThis study investigated the properties of seawater and sea sand concrete (SSC), considering the curing(SEM) and X-ray powder diffraction (XRD) methods were applied to understand the microstructure and hydration

Keywords： seawater and sea sand concrete     compressive strength     strain field     microstructure     hydration products    

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Concrete crack and control

Miao Changwen,Liu Jianzhong,Tian Qian

Strategic Study of CAE 2013, Volume 15, Issue 4,   Pages 30-35

Abstract:

Concrete cracking is a very popular problem throughout the civil engineeringIn this paper,  the harms and causes of concrete crack were analyzed first.Based on the regulation of early age hydration of cement,  a new technology was introduced for impro-vingtemperature control effect of mass concrete.At last,  a telechelic toughening material was also recommended to improve the toughness of concrete

Keywords： concrete     crack     shrinkage     hydration heat     toughness    

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Understanding the behavior of recycled aggregate concrete by using thermogravimetric analysis

Subhasis PRADHAN, Shailendra KUMAR, Sudhirkumar V. BARAI

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 6,   Pages 1561-1572 doi: 10.1007/s11709-020-0640-5

Abstract: A method is proposed to estimate the degree of hydration ( ) from chemically bound water ( ).The PPM mix designed concrete mixes exhibit lower .The compressive strength of concrete and cannot be correlated for concrete mixes with different aggregatetype and mix design method as the present study confirms that the degree of hydration is not the onlyparameter which governs the macro-mechanical properties of concrete.

Keywords： recycled aggregate concrete     Particle Packing Method     thermogravimetric analysis     chemically bound water     degree of hydration     Fourier transform infrared spectroscopy    

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Hydration Characteristics and Microstructure of Alkali-Activated Slag Concrete: A Review Review

Qiang Fu,Mengxin Bu,Zhaorui Zhang,Wenrui Xu,Qiang Yuan,Ditao Niu

Engineering 2023, Volume 20, Issue 1,   Pages 162-179 doi: 10.1016/j.eng.2021.07.026

Abstract:

Alkali-activated slag concrete (AASC) is a new green building material.The amount of CO2 produced by AASC is 1/5th of that produced by ordinary Portland cement concreteThe progress of the research on the hydration characteristics, microstructure, interfacial transitionthe slag composition, the type and dosage of the alkali activator, and the curing conditions on the hydration

Keywords： Alkali-activated slag concrete     hydration characteristics     pore structure     interfacial transition zone     Microstructure    

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A general framework for modeling long-term behavior of earth and concrete dams

Bernhard A. SCHREFLER, Francesco PESAVENTO, Lorenzo SANAVIA, Giuseppe SCIUME, Stefano SECCHI, Luciano SIMONI

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 1,   Pages 41-52 doi: 10.1007/s11709-010-0070-x

Abstract: Many problems are linked with the long-term behavior of both earthdams and concrete dams.They range from hydraulic fracturing to alkali-silica reaction (ASR) and to repair work in concrete dams

Keywords： earth dams     concrete dams     multiphase porous materials     coupled problems     hydraulic fracture     concrete hydration    

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Analysis and control of hydration heat of cast-in-place diaphragm of segmental precast box girder

Chen Yang,Zhong Yao,Zheng Kaiqi,Shen Bin,Meng Shaoping

Strategic Study of CAE 2013, Volume 15, Issue 8,   Pages 99-103

Abstract: Considering the volume of the diaphragm, it belongs to massive concrete,in which concrete hydration heatfield theory, numerical simulation with ANSYS was performed, to investigate the distribution law of hydrationThe analysis shows that, the tensile stress at the outside of the webs is sufficient to lead to concretecracking, longitudinal micro-cracks along the webs is also observed during the hydration heat test.

Keywords： concrete box girder     hydration heat     temperature field     stress field     cracks    

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Field test on temperature field and thermal stress for prestressed concrete box-girder bridge

Baoguo CHEN, Rui DING, Junjie ZHENG, Shibiao ZHANG

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 2,   Pages 158-164 doi: 10.1007/s11709-009-0002-9

Abstract: investigate the distribution of temperature field and the variation of thermal stress for a prestressed concreteThe change of hydration heat temperature consists of four periods: temperature rising period, constantThe peak value of hydration heat temperature increases with the increasing casting temperature of concreteAccording to field tests, the thermal stress incurred by hydration heat may induce temperature cracks

Keywords： box-girder bridge     field test     hydration heat     temperature field     temperature gradient     thermal stress    

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Thermodynamic analysis of ethanol synthesis from hydration of ethylene coupled with a sequential reaction

Jie Gao, Zhikai Li, Mei Dong, Weibin Fan, Jianguo Wang

Frontiers of Chemical Science and Engineering 2020, Volume 14, Issue 5,   Pages 847-856 doi: 10.1007/s11705-019-1848-6

Abstract: Coal-based ethanol production by hydration of ethylene is limited by the low equilibrium ethylene conversionTo improve ethylene conversion, coupling hydration of ethylene with a potential ethanol consumption reaction

Keywords： ethylene     ethanol     thermodynamics     coupling    

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Evaluation Method and Mitigation Strategies for Shrinkage Cracking of Modern Concrete Article

Jiaping Liu, Qian Tian, Yujiang Wang, Hua Li, Wen Xu

Engineering 2021, Volume 7, Issue 3,   Pages 348-357 doi: 10.1016/j.eng.2021.01.006

Abstract:

The complex compositions and large shrinkage of concrete, as well as the strong constraints of thestructures, often lead to prominent shrinkage cracking problems in modern concrete structures.introduces a multi-field (hydro–thermo–hygro–constraint) coupling model with the hydrationThese technologies can efficiently reduce the thermal, autogenous, and drying shrinkages of concrete.Finally, two engineering application examples are provided that demonstrate that concrete shrinkage cracking

Keywords： Modern concrete     Shrinkage     Hydration degree     Mitigation strategies     Cracking risk    

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Quantification of hydration products in cementitious materials incorporating silica nanoparticles

L. P. SINGH,A. GOEL,S. K. BHATTACHARYYA,G. MISHRA

Frontiers of Structural and Civil Engineering 2016, Volume 10, Issue 2,   Pages 162-167 doi: 10.1007/s11709-015-0315-9

Abstract: silica nanoparticles (30-70nm) were supplemented into cement paste to study their influence on degree of hydrationAs the hydration time proceeds, the degree of hydration reach to 76% in nano-modified cement paste whereasAn influence of degree of hydration on the porosity was also determined.is ~35 % only, it revealed that silica nanoparticles refines the pore structure due to accelerated hydrationThese studies reveal that the hydration mechanism of the cement can be tuned with the incorporation of

Keywords： degree of hydration     porosity     calcium-silicate-hydrate (C-S-H)     silica nanoparticles    

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Hydration, microstructure and autogenous shrinkage behaviors of cement mortars by addition of superabsorbent

Beibei SUN, Hao WU, Weimin SONG, Zhe LI, Jia YU

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 5,   Pages 1274-1284 doi: 10.1007/s11709-020-0656-x

Abstract: The present study systematically and quantitively investigated the effect of SAP on hydration, autogenousInfluences of SAP on hydration heat and autogenous shrinkage were studied by utilizing TAM AIR technologyAlthough SAP decreased the peak rate of hydration heat and retarded the hydration, it significantly increasedthe cumulative heat, indicating SAP helps promote the hydration.Hydration promotion caused by SAP mainly occurred in the deceleration period and attenuation period.

Keywords： Superabsorbent Polymer     mechanical properties     hydration heat     autogenous shrinkage     microstructure    

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Effect of a commercial dispersion of multi walled carbon nanotubes on the hydration of an oil well cementing

Ocar Aurelio MENDOZA REALES,William C.PEARL Jr,Maria D. M. PAIVA,CristianeR. MIRANDA,Romildo Dias TOLEDO FILHO

Frontiers of Structural and Civil Engineering 2016, Volume 10, Issue 2,   Pages 174-179 doi: 10.1007/s11709-015-0324-8

Abstract: work studies the influence of a commercial dispersion of multi wall carbon nanotubes (MWCNT) on the hydrationIsothermal calorimetry results showed a clear retardation of the hydration of cement caused by the surfactantNevertheless, thermogravimetric evaluations showed that once the hydration reaction resumed, the retardationeffect of the surfactant did not have a negative impact on the amount of hydration products precipitated

Keywords： carbon nanotubes     surfactant     retardation     combined water     C-S-H    

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Appraising the potential of calcium sulfoaluminate cement-based grouts in simulated permafrost environments

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 5,   Pages 722-731 doi: 10.1007/s11709-023-0950-5

Abstract: The hydration and performance of CSA cement-based grouts cured in cold environments (10, 0, and −10 °Meanwhile, results of the TGA and XRD tests show the generation of a significant quantity of hydrationproducts, which indicates the rapid hydration of CSA cement-based grouts at the early stage at low temperatures

Keywords： permafrost     low temperatures     calcium sulfoaluminate cement-based grouts     hydration reaction     compressive    

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Slender reinforced concrete shear walls with high-strength concrete boundary elements

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 1,   Pages 138-151 doi: 10.1007/s11709-022-0897-y

Abstract: Reinforced concrete structural walls are commonly used for resisting lateral forces in buildings.Owing to the advancements in the field of concrete materials over the past few decades, concrete mixesof high compressive strength, commonly referred to as high-strength concrete (HSC), have been developedThe finite-element model of a conventional normal-strength concrete (NSC) prototype wall was validatedCold joints resulting from dissimilar concrete pours in the web and boundary elements of the HSC wall

Keywords： slender walls     high-strength concrete     rectangular and barbell-shaped walls     cold joints    

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Stability of three-dimensional printable foam concrete as function of surfactant characteristics

Frontiers of Structural and Civil Engineering   Pages 935-947 doi: 10.1007/s11709-023-0964-z

Abstract: Extrudability is one of the most critical factors when designing three-dimensional printable foam concretethe foam stability which necessitates the investigation into surfactant properties particularly for concreteprinted foam concrete are scarce.characteristics on the stability, extrudability, and buildability of three-dimensional printed foam concreteUnlike traditional foam concrete, the variation in the stabilizer concentration and density of concrete

Keywords： foam concrete     3D printable concrete     stability     rheology     air void microstructure    

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Title Author Date Type Operation

Compressive behavior and microstructure of concrete mixed with natural seawater and sea sand

Journal Article

Concrete crack and control

Miao Changwen,Liu Jianzhong,Tian Qian

Journal Article

Understanding the behavior of recycled aggregate concrete by using thermogravimetric analysis

Subhasis PRADHAN, Shailendra KUMAR, Sudhirkumar V. BARAI

Journal Article

Hydration Characteristics and Microstructure of Alkali-Activated Slag Concrete: A Review

Qiang Fu,Mengxin Bu,Zhaorui Zhang,Wenrui Xu,Qiang Yuan,Ditao Niu

Journal Article

A general framework for modeling long-term behavior of earth and concrete dams

Bernhard A. SCHREFLER, Francesco PESAVENTO, Lorenzo SANAVIA, Giuseppe SCIUME, Stefano SECCHI, Luciano SIMONI

Journal Article

Analysis and control of hydration heat of cast-in-place diaphragm of segmental precast box girder

Chen Yang,Zhong Yao,Zheng Kaiqi,Shen Bin,Meng Shaoping

Journal Article

Field test on temperature field and thermal stress for prestressed concrete box-girder bridge

Baoguo CHEN, Rui DING, Junjie ZHENG, Shibiao ZHANG

Journal Article

Thermodynamic analysis of ethanol synthesis from hydration of ethylene coupled with a sequential reaction

Jie Gao, Zhikai Li, Mei Dong, Weibin Fan, Jianguo Wang

Journal Article

Evaluation Method and Mitigation Strategies for Shrinkage Cracking of Modern Concrete

Jiaping Liu, Qian Tian, Yujiang Wang, Hua Li, Wen Xu

Journal Article

Quantification of hydration products in cementitious materials incorporating silica nanoparticles

L. P. SINGH,A. GOEL,S. K. BHATTACHARYYA,G. MISHRA

Journal Article

Hydration, microstructure and autogenous shrinkage behaviors of cement mortars by addition of superabsorbent

Beibei SUN, Hao WU, Weimin SONG, Zhe LI, Jia YU

Journal Article

Effect of a commercial dispersion of multi walled carbon nanotubes on the hydration of an oil well cementing

Ocar Aurelio MENDOZA REALES,William C.PEARL Jr,Maria D. M. PAIVA,CristianeR. MIRANDA,Romildo Dias TOLEDO FILHO

Journal Article

Appraising the potential of calcium sulfoaluminate cement-based grouts in simulated permafrost environments

Journal Article

Slender reinforced concrete shear walls with high-strength concrete boundary elements

Journal Article

Stability of three-dimensional printable foam concrete as function of surfactant characteristics

Journal Article