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The drying shrinkage and crack resistance of self-leveling cement mortars with sulfate-rich sewage sludge ash and superabsorbent polymers SCIE
期刊论文 | 2025 , 105 | JOURNAL OF BUILDING ENGINEERING
Abstract&Keyword Cite Version(2)

Abstract :

The sulfate-rich sewage sludge ash (SRSSA) could be recycling used as expansive agents in selfleveling cement mortars, and superabsorbent polymers (SAP) can effectively reduce the shrinkage of cement-based materials. Therefore, SRSSA and SAP were used as admixtures to prepare self-leveling cement mortars. The influences of SRSSA and SAP on the fluidity, strength, drying shrinkage, crack resistance and microstructure of self-leveling cement mortars were studied. The initial fluidity and 20-min fluidity of self-leveling cement mortars were slightly reduced when SRSSA and SAP were added. The flexural strength and compressive strength of selfleveling cement mortars improved when the SRSSA content was lower than 6 % of binders, and the strengths were reduced when SRSSA were added by 8 % and 10 %. The addition of SAP further reduced the strengths of self-leveling cement mortar. The drying shrinkage of self-leveling cement mortars decreased when SRSSA was added as expansive agents, and the added SAP further reduced the drying shrinkage. The addition of SRSSA postponed the initial cracking time and improved the crack resistance of self-leveling cement mortars. When SAP was added together, the crack resistance of self-leveling cement mortars became better. The formation of ettringite in self-leveling cement mortars was promoted by the presence of SRSSA and SAP, and the addition of SAP with SRSSA also reduced the porosity tested with mercury intrusion porosimeter. Generally, SRSSA can be used as expansive agents in self-leveling cement mortars, which is a new method to recycle use SRSSA in cement-based materials.

Keyword :

Crack resistance Crack resistance Drying shrinkage Drying shrinkage Self-leveling cement mortar Self-leveling cement mortar Sewage sludge ash Sewage sludge ash Superabsorbent polymers Superabsorbent polymers

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GB/T 7714 Gu, Chunping , Lin, Junyi , Wang, Qiannan et al. The drying shrinkage and crack resistance of self-leveling cement mortars with sulfate-rich sewage sludge ash and superabsorbent polymers [J]. | JOURNAL OF BUILDING ENGINEERING , 2025 , 105 .
MLA Gu, Chunping et al. "The drying shrinkage and crack resistance of self-leveling cement mortars with sulfate-rich sewage sludge ash and superabsorbent polymers" . | JOURNAL OF BUILDING ENGINEERING 105 (2025) .
APA Gu, Chunping , Lin, Junyi , Wang, Qiannan , Wei, Haixia , Cui, Dong , Kong, Deyu et al. The drying shrinkage and crack resistance of self-leveling cement mortars with sulfate-rich sewage sludge ash and superabsorbent polymers . | JOURNAL OF BUILDING ENGINEERING , 2025 , 105 .
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The drying shrinkage and crack resistance of self-leveling cement mortars with sulfate-rich sewage sludge ash and superabsorbent polymers EI
期刊论文 | 2025 , 105 | Journal of Building Engineering
The drying shrinkage and crack resistance of self-leveling cement mortars with sulfate-rich sewage sludge ash and superabsorbent polymers Scopus
期刊论文 | 2025 , 105 | Journal of Building Engineering
Chloride ion-triggered silver alginate (Alg-Ag) microcapsules for reinforcement anti-corrosion: Preparation and inhibition mechanism EI
期刊论文 | 2025 , 108 | Journal of Building Engineering
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Abstract :

The application of corrosion inhibitors provides an efficient approach for mitigating steel rebar corrosion. However, the premature failure of corrosion inhibitors in concrete remains a pending issue. The adoption of microencapsulated inhibitors shows significant promise in addressing this concern. This study proposes a novel chloride ion-triggered microcapsule designed for the anti-corrosion protection of reinforcement. The microcapsules were synthesized using calcium carbonate (CaCO3) particles as a template and sodium monofluorophosphate (MFP) as the encapsulated inhibitory core. The exterior of the CaCO3 particles was coated with a silver alginate (Alg-Ag) layer, which confers the chloride ion-triggered release mechanism. The activation of microcapsules occurs through a chemical reaction between silver ions in the Alg-Ag layer and chloride ions from the environment, resulting in the formation of silver chloride and the subsequent disintegration of the microcapsule. The MFP inhibitor is released as a consequence. The fabricated microcapsules were characterized in terms of morphology and chemical composition. The inhibitory performance of the microcapsules was analyzed by electrochemical methods. The use of the CaCO3 template was found to be effective in producing a porous matrix suitable for the loading of MFP. The microcapsules exhibit a well-defined spherical morphology with a distinct core-shell structure. Both FTIR and TG analysis confirmed the successful entrapment of MFP within the core of microcapsules. Electrochemical corrosion tests demonstrated that the microcapsules effectively retarded the corrosion process of the reinforcement, with the corrosion inhibition efficiency increasing from 59.1 % at 24 h to 63.8 % at 72 h, indicative of a controlled and progressive release of the inhibitor from the microcapsules. © 2025 Elsevier Ltd

Keyword :

Activation analysis Activation analysis Anodic protection Anodic protection Chemical activation Chemical activation Chemical detection Chemical detection Corrosion resistant coatings Corrosion resistant coatings Decay (organic) Decay (organic) Electrolytic analysis Electrolytic analysis Metal analysis Metal analysis Microanalysis Microanalysis

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GB/T 7714 Wang, Wencheng , Xie, Nanxi , Lin, Zhenkun et al. Chloride ion-triggered silver alginate (Alg-Ag) microcapsules for reinforcement anti-corrosion: Preparation and inhibition mechanism [J]. | Journal of Building Engineering , 2025 , 108 .
MLA Wang, Wencheng et al. "Chloride ion-triggered silver alginate (Alg-Ag) microcapsules for reinforcement anti-corrosion: Preparation and inhibition mechanism" . | Journal of Building Engineering 108 (2025) .
APA Wang, Wencheng , Xie, Nanxi , Lin, Zhenkun , Zhang, Yong , Chen, Yan , Liu, Zhongmin . Chloride ion-triggered silver alginate (Alg-Ag) microcapsules for reinforcement anti-corrosion: Preparation and inhibition mechanism . | Journal of Building Engineering , 2025 , 108 .
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Chloride ion-triggered silver alginate (Alg-Ag) microcapsules for reinforcement anti-corrosion: Preparation and inhibition mechanism Scopus
期刊论文 | 2025 , 108 | Journal of Building Engineering
Chloride ion-triggered silver alginate (Alg-Ag) microcapsules for reinforcement anti-corrosion: Preparation and inhibition mechanism SCIE
期刊论文 | 2025 , 108 | JOURNAL OF BUILDING ENGINEERING
Passivation behavior of reinforcement in simulated pore solutions of composite cement incorporating ultrafine steel slag and blast furnace slag SCIE
期刊论文 | 2024 , 97 | JOURNAL OF BUILDING ENGINEERING
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Abstract :

The steel slag and ground granulated blast furnace slag with high fineness exhibit synergistic effects on hydration progress and can be introduced into concrete in high volume. In this paper, the simulated pore solution (SPS) of ternary cement incorporating ultrafine steel slag (US) and ultrafine ground granulated blast furnace slag (UG) was prepared to examine the passivation behavior of the HRB400 reinforcing steel under SPS. It is found that the rapid growth of passive films occurs primarily within the initial 2-3 days after immersion in the SPS, while the compaction of passive films takes place mainly at the later stages. The open circuit potential and charge transfer resistance of the passive films initially increase and then decrease with the continuous rise in the US content. The Fe2O3 constitutes a significant portion of the passive films above the steels treated with the SPS irrespective of US dosages, whereas the content of FeO is highly influenced by US dosages. The UG-US-C pore solution could enhance the passivation behavior because of lower Ca2+ and higher Na+. In case of UG/US ratio at 2:3, the passive film exhibits the greatest thickness at 7.5 nm and meanwhile with the highest compaction and the least roughness.

Keyword :

Electrochemical properties Electrochemical properties Passive films Passive films Reinforcing steel Reinforcing steel Simulated pore solution Simulated pore solution Surface characteristics Surface characteristics Ultrafine steel slag Ultrafine steel slag

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GB/T 7714 Yang, Zhengxian , Zheng, Mingye , Xiong, Xiaoli et al. Passivation behavior of reinforcement in simulated pore solutions of composite cement incorporating ultrafine steel slag and blast furnace slag [J]. | JOURNAL OF BUILDING ENGINEERING , 2024 , 97 .
MLA Yang, Zhengxian et al. "Passivation behavior of reinforcement in simulated pore solutions of composite cement incorporating ultrafine steel slag and blast furnace slag" . | JOURNAL OF BUILDING ENGINEERING 97 (2024) .
APA Yang, Zhengxian , Zheng, Mingye , Xiong, Xiaoli , Zhang, Yong , Briseghella, Bruno , Marano, Giuseppe Carlo . Passivation behavior of reinforcement in simulated pore solutions of composite cement incorporating ultrafine steel slag and blast furnace slag . | JOURNAL OF BUILDING ENGINEERING , 2024 , 97 .
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Passivation behavior of reinforcement in simulated pore solutions of composite cement incorporating ultrafine steel slag and blast furnace slag EI
期刊论文 | 2024 , 97 | Journal of Building Engineering
Passivation behavior of reinforcement in simulated pore solutions of composite cement incorporating ultrafine steel slag and blast furnace slag Scopus
期刊论文 | 2024 , 97 | Journal of Building Engineering
Synergistic enhancement of g-C3N4/CoAl-LDH nanoflower and mineral admixtures on the properties of nano-engineered cementitious composites SCIE
期刊论文 | 2024 , 450 | CONSTRUCTION AND BUILDING MATERIALS
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Abstract :

The nano-engineered cementitious composites (NCC) were prepared using g-C3N4/CoAl-LDH 3 N 4 /CoAl-LDH nanoflower (nanoCN/L), in combination with mineral admixtures including fly ash (FA), metakaolin (MK), and ground granulated blast furnace slag (GGBFS). The synergistic effects and mechanisms of nano-CN/L and mineral admixtures on the mechanical, chloride penetration resistance and air purification properties of NCC were investigated. The results show that nano-CN/L promotes the early hydration of cementitious materials and improves the composition and morphology of C-S-H gel. Furthermore, the filling effect of nano-CN/L significantly optimizes the pore structure and interfacial crack width of NCC, thereby eliminating the adverse impact of FA, MK, and GGBFS on its early mechanical strengths. Additionally, nano-CN/L enhances the chloride penetration resistance and NOx x removal properties of NCC through its strong ion adsorption and photocatalytic activity, respectively. Incorporating 0.9 % nano-CN/L by mass of cementitious materials reduces the chloride diffusion coefficient of NCC at curing age of 56d by 26.9 % and increases the NOx x removal ratio by 11 times. The 7d's compressive and flexural strengths of NCC increase by 13.6 % and 4.6 %, respectively, compared to the one without nano-CN/L. As a novel multifunctional nanomaterial, nano-CN/L not only provides a new pathway for extending the service life of cementitious composites, but also injects new momentum into their environmental-friendly development.

Keyword :

Chloride penetration resistance Chloride penetration resistance Mechanical strength Mechanical strength Mineral admixture Mineral admixture Nano-engineered cementitious composites Nano-engineered cementitious composites

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GB/T 7714 Lu, Lin , Yang, Zhengxian , Ning, Pingping et al. Synergistic enhancement of g-C3N4/CoAl-LDH nanoflower and mineral admixtures on the properties of nano-engineered cementitious composites [J]. | CONSTRUCTION AND BUILDING MATERIALS , 2024 , 450 .
MLA Lu, Lin et al. "Synergistic enhancement of g-C3N4/CoAl-LDH nanoflower and mineral admixtures on the properties of nano-engineered cementitious composites" . | CONSTRUCTION AND BUILDING MATERIALS 450 (2024) .
APA Lu, Lin , Yang, Zhengxian , Ning, Pingping , Marano, Giuseppe Carlo , Zhang, Yong . Synergistic enhancement of g-C3N4/CoAl-LDH nanoflower and mineral admixtures on the properties of nano-engineered cementitious composites . | CONSTRUCTION AND BUILDING MATERIALS , 2024 , 450 .
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Synergistic enhancement of g-C3N4/CoAl-LDH nanoflower and mineral admixtures on the properties of nano-engineered cementitious composites EI
期刊论文 | 2024 , 450 | Construction and Building Materials
Synergistic enhancement of g-C3N4/CoAl-LDH nanoflower and mineral admixtures on the properties of nano-engineered cementitious composites Scopus
期刊论文 | 2024 , 450 | Construction and Building Materials
Nanoscale chloride diffusion in alkali-activated steel slag and ultrafine blast furnace slag considering the electrical double layer effect SCIE
期刊论文 | 2024 , 88 | JOURNAL OF BUILDING ENGINEERING
WoS CC Cited Count: 4
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Abstract :

Utilizations of industrial byproducts and wastes as much as possible, together with desirable durability, are essential to sustainable development of building materials. In this work, the chloride diffusion behavior of alkali -activated steel slag (SS) and ultrafine blast furnace slag (UFS) is studied, towards deeper insights into the effect of electrical double layer on the resistance to chloride penetration. The microstructure improvement of alkali -activated SS with increasing addition of UFS was examined by means of X-ray diffraction, Fourier transform infrared spectroscopy, thermogravimetric analysis, mercury intrusion porosimetry and nitrogen sorption. The zeta potentials above the pore surface of various alkali -activated SS-UFS systems were measured and compared. The electrostatic resistance of the electrical double layer to chloride diffusion was analyzed and discussed. Results indicate that UFS dosages above 40% substantially refines the pore structure of alkali -activated SS and then the mechanism governing chloride penetration shifts from capillary transport to gel transport. The exposure of higher chloride sodium concentration results in the pore surface of alkali -activated SS-UFS systems to be less negatively charged and the zeta potential is reversed to be positive value after continuous ion exchange between sodium and calcium. The presence of UFS can remarkably increase the proportion of physically bound chloride that attains approximately 80% of the total binding capacity. The impediment of electrical double layer to chloride diffusivity becomes increasingly pronounced with pore structure refinement, especially for mixtures with diffusion coefficients below 5 x 10 -12 m 2 /s obtained based on Fick ' s law of diffusion.

Keyword :

Alkali-activated system Alkali-activated system Electrical double layer Electrical double layer Nanoscale chloride transport Nanoscale chloride transport Steel slag Steel slag Ultrafine blast furnace slag Ultrafine blast furnace slag Zeta potential Zeta potential

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GB/T 7714 Zhang, Yong , Xu, Xianqiang , Wang, Zhendi et al. Nanoscale chloride diffusion in alkali-activated steel slag and ultrafine blast furnace slag considering the electrical double layer effect [J]. | JOURNAL OF BUILDING ENGINEERING , 2024 , 88 .
MLA Zhang, Yong et al. "Nanoscale chloride diffusion in alkali-activated steel slag and ultrafine blast furnace slag considering the electrical double layer effect" . | JOURNAL OF BUILDING ENGINEERING 88 (2024) .
APA Zhang, Yong , Xu, Xianqiang , Wang, Zhendi , Yang, Zhengxian , Qian, Rusheng , Marano, Giuseppe Carlo . Nanoscale chloride diffusion in alkali-activated steel slag and ultrafine blast furnace slag considering the electrical double layer effect . | JOURNAL OF BUILDING ENGINEERING , 2024 , 88 .
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Nanoscale chloride diffusion in alkali-activated steel slag and ultrafine blast furnace slag considering the electrical double layer effect EI
期刊论文 | 2024 , 88 | Journal of Building Engineering
Nanoscale chloride diffusion in alkali-activated steel slag and ultrafine blast furnace slag considering the electrical double layer effect Scopus
期刊论文 | 2024 , 88 | Journal of Building Engineering
Autogenous shrinkage and sustainability assessment of alkali-activated slag incorporating steel slag SCIE
期刊论文 | 2024 , 438 | CONSTRUCTION AND BUILDING MATERIALS
WoS CC Cited Count: 4
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Abstract :

This paper presents a comprehensive investigation on the positive potential of steel slag (SS) to mitigate the autogenous shrinkage of alkali -activated slag (AAS) while maintaining a reasonably high strength. Changes of the physicochemical properties of AAS with the addition of SS were examined in terms of hydration heat, autogenous shrinkage, chemical shrinkage, internal relative humidity (RH) and mechanical behaviors. The microstructure of AAS-SS systems was characterized using X-ray diffraction, thermogravimetric analysis and nitrogen adsorption techniques. The shrinkage mechanism and quantification approach of the AAS-SS systems were discussed, in addition to a sustainability assessment. The results indicate that the 7 -day autogenous shrinkage of AAS paste was decreased by 16 %, 35 % and 42 % when SS was incorporated by 15 %, 30 % and 45 % respectively, owing to the obviously slower hydration and higher internal RH at the early age. Meanwhile, the inclusion of SS substantially mitigates the chemical shrinkage and reduces the pores below 50 nm, thereby significantly decreasing the capillary pressure associated with smaller water -filled pore sizes. Substitutions of blast furnace slag by up to 45 % SS enable to reduce CO 2 emissions by 18.4 kg/m 3 and decrease autogenous shrinkage by 42 % without obvious compromise in the loss of elastic modulus and compressive strength.

Keyword :

Alkali-activated slag Alkali-activated slag Autogenous shrinkage Autogenous shrinkage Chemical shrinkage Chemical shrinkage Hydration Hydration Steel slag Steel slag Sustainability Sustainability

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GB/T 7714 Li, Kang , Yang, Zhengxian , Nicolaides, Demetris et al. Autogenous shrinkage and sustainability assessment of alkali-activated slag incorporating steel slag [J]. | CONSTRUCTION AND BUILDING MATERIALS , 2024 , 438 .
MLA Li, Kang et al. "Autogenous shrinkage and sustainability assessment of alkali-activated slag incorporating steel slag" . | CONSTRUCTION AND BUILDING MATERIALS 438 (2024) .
APA Li, Kang , Yang, Zhengxian , Nicolaides, Demetris , Liang, Minfei , Briseghella, Bruno , Marano, Giuseppe Carlo et al. Autogenous shrinkage and sustainability assessment of alkali-activated slag incorporating steel slag . | CONSTRUCTION AND BUILDING MATERIALS , 2024 , 438 .
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Autogenous shrinkage and sustainability assessment of alkali-activated slag incorporating steel slag EI
期刊论文 | 2024 , 438 | Construction and Building Materials
Autogenous shrinkage and sustainability assessment of alkali-activated slag incorporating steel slag Scopus
期刊论文 | 2024 , 438 | Construction and Building Materials
Particle packing optimization and pore structure assessment of ternary cementitious system based on X-ray computed tomography and mercury intrusion porosimetry SCIE
期刊论文 | 2024 , 413 | CONSTRUCTION AND BUILDING MATERIALS
WoS CC Cited Count: 10
Abstract&Keyword Cite Version(2)

Abstract :

The introduction of high-volume steel slag into ordinary Portland cement (OPC) has a negative effect on the pore structure due to its poor hydraulic reactivity. Synergistic effects between steel slag and ground granulated blast furnace slag (GGBFS) in cementitious system have drawn increasing attention. In this study, the modified Andreasen and Andersen (MAA) model was adopted for the mixture design of ternary cementitious system incorporating high-volume ultrafine steel slag (USS) and GGBFS without a compromise in strength. X-ray computed tomography (X-CT) and mercury intrusion porosimetry (MIP) were applied to characterize the pore structure of various cementitious mortars in terms of porosity, pore size, pore number, pore morphology and homogeneity. Results manifested that the adverse impact of USS addition on the pore structure of binary cement was effectively mitigated in the ternary cement USS-GGBFS-OPC after mixture optimization, whereby the pore size was shifted toward a finer distribution and simultaneously with a higher uniformity and consequently promoting the compressive strength development. An increase of cumulative pore volume as captured by X-CT was associated with an exponential decrease of the number of pores while together with larger pore sizes. The increase in the number of small pores led to an increase in the pore tortuosity and degree of sphericity. The fractal dimension of pores was negatively correlated with pore inhomogeneity and compressive strength. These findings provide new insights into homogeneity-oriented mixture design of composite cementitious binders based on gap-graded particle packing, together with their synergistic effects on hydration progress.

Keyword :

Fractal dimension Fractal dimension Homogeneity Homogeneity Particle packing optimization Particle packing optimization Pore structure Pore structure Ultrafine steel slag Ultrafine steel slag X-ray computed tomography X-ray computed tomography

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GB/T 7714 Yang, Zhengxian , Dong, Shilin , Zhang, Yong . Particle packing optimization and pore structure assessment of ternary cementitious system based on X-ray computed tomography and mercury intrusion porosimetry [J]. | CONSTRUCTION AND BUILDING MATERIALS , 2024 , 413 .
MLA Yang, Zhengxian et al. "Particle packing optimization and pore structure assessment of ternary cementitious system based on X-ray computed tomography and mercury intrusion porosimetry" . | CONSTRUCTION AND BUILDING MATERIALS 413 (2024) .
APA Yang, Zhengxian , Dong, Shilin , Zhang, Yong . Particle packing optimization and pore structure assessment of ternary cementitious system based on X-ray computed tomography and mercury intrusion porosimetry . | CONSTRUCTION AND BUILDING MATERIALS , 2024 , 413 .
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Particle packing optimization and pore structure assessment of ternary cementitious system based on X-ray computed tomography and mercury intrusion porosimetry Scopus
期刊论文 | 2024 , 413 | Construction and Building Materials
Particle packing optimization and pore structure assessment of ternary cementitious system based on X-ray computed tomography and mercury intrusion porosimetry EI
期刊论文 | 2024 , 413 | Construction and Building Materials
Investigations on carbon-sequestration optimization of recycled coarse-aggregate and its effects on concrete performances SCIE
期刊论文 | 2024 , 90 | JOURNAL OF BUILDING ENGINEERING
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Abstract :

Recycled coarse-aggregate (RCA) derived from waste concrete can be re-used for concrete preparation, which is now limited due to its drawbacks such as micro-cracks, high-porosity, and reduced concrete strengths. To remedy these deficiencies, carbon-sequestration was employed to enhance RCA and the conditions were optimized, including the temperature (20 degrees C-40 degrees C), pressure (0.1 MPa-0.3 MPa), time (5 h-24 h) and initial water content (25%-75 %). There parameters were optimized based on the orthogonal test with scheme L-9(3(4)), which was evaluated based on RCA carbon-sequestration amount as well as its properties. With the optimized parameters, RCA was enhanced as CRCA. Both RCA and CRCA were utilized to fully replace natural coarse-aggregate (NCA) in concrete and concrete basic performances were investigated systematically, including strengths, shrinkage and medium transport properties. The results show that the effects of carbon-sequestration time and initial water-content of aggregate on the carbon-sequestration efficiency of RCA are the most significant. The optimized parameters were 30 degrees C temperature, 0.3 MPa pressure, 24 h time and 25 % initial water content with the maximum amount of carbon-sequestration at 8.42 %. The carbon-sequestration reduced the width of the recycled aggregate interfacial transition zone (ITZ) in concrete, increased the microhardness of ITZ and mortar, and decreased the porosity of CRCA. The CRCA elevated the compressive strength, splitting tensile strength and flexural strength of the concrete (28d) by 13.5 %, 8.5 % and 7.4 %, respectively. The drying shrinkage at 28d of RCA-concrete was decreased by 12.0 % when RCA was replaced with CRCA, however with the CRCA value still 16.2 % higher than that of NCA-concrete. Moreover, CRCA can decrease the medium transport coefficients of water, chloride, and gas in concrete when compared with the RCA-concrete while they are still greater than those of NCA-concrete.

Keyword :

Carbon-sequestration reinforcement Carbon-sequestration reinforcement Durability Durability Mechanical property Mechanical property Microstructure Microstructure Recycled coarse-aggregate Recycled coarse-aggregate

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GB/T 7714 Qian, Rusheng , Wan-Wendner, Lin , Yang, Chengqi et al. Investigations on carbon-sequestration optimization of recycled coarse-aggregate and its effects on concrete performances [J]. | JOURNAL OF BUILDING ENGINEERING , 2024 , 90 .
MLA Qian, Rusheng et al. "Investigations on carbon-sequestration optimization of recycled coarse-aggregate and its effects on concrete performances" . | JOURNAL OF BUILDING ENGINEERING 90 (2024) .
APA Qian, Rusheng , Wan-Wendner, Lin , Yang, Chengqi , Zhao, Ruze , Ye, Zhibo , Kong, Deyu et al. Investigations on carbon-sequestration optimization of recycled coarse-aggregate and its effects on concrete performances . | JOURNAL OF BUILDING ENGINEERING , 2024 , 90 .
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Investigations on carbon-sequestration optimization of recycled coarse-aggregate and its effects on concrete performances EI
期刊论文 | 2024 , 90 | Journal of Building Engineering
Investigations on carbon-sequestration optimization of recycled coarse-aggregate and its effects on concrete performances Scopus
期刊论文 | 2024 , 90 | Journal of Building Engineering
A Review of Recent Advances in Alkali-activated Materials from Silica-rich Wastes Derived Sodium Silicate Activators SCIE
期刊论文 | 2023 , 21 (3) , 189-203 | JOURNAL OF ADVANCED CONCRETE TECHNOLOGY
WoS CC Cited Count: 8
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Abstract :

Sodium silicate activators derived from silica-rich wastes have attracted increasing attention owing to their promotion on the sustainable production and development of alkali-activated materials (AAM). This paper presents the research pro-gress on the feasibility of using silica-rich wastes-derived sodium silicate activator as an alternative to commercial sodium silicate activator in AAM. The basic factors affecting the quality of silica-rich wastes-derived sodium silicate activator are reviewed. The structure features between commercial sodium silicate and derivative sodium silicate are addressed and compared. Influences of the two different sodium silicates on flowability, mechanical properties, microstructure and du-rability are summarized and discussed. Previous studies reveal that utilizations of amorphously rich SiO2 containing ma-terials, together with proper preparation technology, enable to produce highly reactive sodium silicate activators and as a consequence to obtain materials with comparable or even better performances as compared to the commercially available sodium silicate-AAM. Recommendations for future investigation are provided eventually.

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GB/T 7714 Lin, Jinming , Zhang, Yong , Yang, Zhengxian . A Review of Recent Advances in Alkali-activated Materials from Silica-rich Wastes Derived Sodium Silicate Activators [J]. | JOURNAL OF ADVANCED CONCRETE TECHNOLOGY , 2023 , 21 (3) : 189-203 .
MLA Lin, Jinming et al. "A Review of Recent Advances in Alkali-activated Materials from Silica-rich Wastes Derived Sodium Silicate Activators" . | JOURNAL OF ADVANCED CONCRETE TECHNOLOGY 21 . 3 (2023) : 189-203 .
APA Lin, Jinming , Zhang, Yong , Yang, Zhengxian . A Review of Recent Advances in Alkali-activated Materials from Silica-rich Wastes Derived Sodium Silicate Activators . | JOURNAL OF ADVANCED CONCRETE TECHNOLOGY , 2023 , 21 (3) , 189-203 .
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A Review of Recent Advances in Alkali-activated Materials from Silica-rich Wastes Derived Sodium Silicate Activators Scopus
期刊论文 | 2023 , 21 (3) , 189-203 | Journal of Advanced Concrete Technology
A Review of Recent Advances in Alkali-activated Materials from Silica-rich Wastes Derived Sodium Silicate Activators EI
期刊论文 | 2023 , 21 (3) , 189-203 | Journal of Advanced Concrete Technology
Mechanical properties and microstructure of engineered cementitious composites with high volume steel slag and GGBFS SCIE
期刊论文 | 2023 , 398 | CONSTRUCTION AND BUILDING MATERIALS
WoS CC Cited Count: 20
Abstract&Keyword Cite Version(2)

Abstract :

Engineered cementitious composites (ECC) achieve exceptional ductility and durability, but the heavy reliance on cement has notable environmental impacts. In this work, the steel slag (SS) and ground granulated blast furnace slag (GGBFS) are introduced into ECC by largely substituting cement. The impact of SS and GGBFS content on ECC's mechanical performance is analyzed at macro and micro scales in terms of fiber dispersion, mechanical properties, cracking patterns, cement hydration, and microstructure. The results demonstrate that SS can enhance fiber dispersion due to the low water demand and the strong electronic double layer formed on the surface of SS particles. While ECC with a high volume of SS alone (60 wt% SS) lacks the necessary strength for structural applications, the combination of GGBFS and SS exhibits favorable hydration properties and can effectively refine the pore structure. Thus, ECC with GGBFS and SS attains ideal toughness. ASTM C 1018 based toughness indices reveal that the Imax of ECC with 30 wt% GGBFS and 30 wt% SS is 2.30 times that of OPC based ECC. A sustainability analysis demonstrates that substituting 30 wt% SS and 30 wt% GGBFS for cement leads to a 33% reduction in energy consumption and a 53% decrease in CO2 emissions of ECC.

Keyword :

Engineered cementitious composites Engineered cementitious composites Ground granulated blast furnace slag Ground granulated blast furnace slag Hydration Hydration Steel slag Steel slag Toughness Toughness

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GB/T 7714 Xiong, Xiaoli , Yang, Zhengxian , Yan, Xueyuan et al. Mechanical properties and microstructure of engineered cementitious composites with high volume steel slag and GGBFS [J]. | CONSTRUCTION AND BUILDING MATERIALS , 2023 , 398 .
MLA Xiong, Xiaoli et al. "Mechanical properties and microstructure of engineered cementitious composites with high volume steel slag and GGBFS" . | CONSTRUCTION AND BUILDING MATERIALS 398 (2023) .
APA Xiong, Xiaoli , Yang, Zhengxian , Yan, Xueyuan , Zhang, Yong , Dong, Shilin , Li, Kang et al. Mechanical properties and microstructure of engineered cementitious composites with high volume steel slag and GGBFS . | CONSTRUCTION AND BUILDING MATERIALS , 2023 , 398 .
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Mechanical properties and microstructure of engineered cementitious composites with high volume steel slag and GGBFS EI
期刊论文 | 2023 , 398 | Construction and Building Materials
Mechanical properties and microstructure of engineered cementitious composites with high volume steel slag and GGBFS Scopus
期刊论文 | 2023 , 398 | Construction and Building Materials
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