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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
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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 Scopus
期刊论文 | 2025 , 105 | Journal of Building Engineering
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
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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 °C–40 °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 L9(34), 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 °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. © 2024 Elsevier Ltd

Keyword :

Carbon Carbon Chlorine compounds Chlorine compounds Compressive strength Compressive strength Concrete aggregates Concrete aggregates Durability Durability Porosity Porosity Recycling Recycling Shrinkage Shrinkage Tensile strength Tensile strength

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GB/T 7714 Qian, Rusheng , Lin, Wan-Wendner , 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 , Lin, Wan-Wendner , 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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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
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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. © 2024 Elsevier Ltd

Keyword :

Blast furnaces Blast furnaces Compaction Compaction Passivation Passivation Slag cement Slag cement

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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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Autogenous shrinkage and sustainability assessment of alkali-activated slag incorporating steel slag EI
期刊论文 | 2024 , 438 | Construction and Building Materials
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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 CO2 emissions by 18.4 kg/m3 and decrease autogenous shrinkage by 42 % without obvious compromise in the loss of elastic modulus and compressive strength. © 2024 Elsevier Ltd

Keyword :

Atomic absorption spectrometry Atomic absorption spectrometry Blast furnaces Blast furnaces Compressive strength Compressive strength Gas adsorption Gas adsorption Hydration Hydration Physicochemical properties Physicochemical properties Pore size Pore size Shrinkage Shrinkage Slags Slags Sustainable development Sustainable development Thermogravimetric analysis Thermogravimetric analysis

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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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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
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Abstract :

The nano-engineered cementitious composites (NCC) were prepared using g-C3N4/CoAl-LDH nanoflower (nano-CN/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 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 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. © 2024 Elsevier Ltd

Keyword :

Air cleaners Air cleaners Blast furnaces Blast furnaces Chlorination Chlorination Compressive strength Compressive strength Nanoclay Nanoclay Nanoflowers Nanoflowers

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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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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
Abstract&Keyword Cite Version(2)

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
Abstract&Keyword Cite Version(2)

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
Abstract&Keyword Cite Version(2)

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
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
Abstract&Keyword Cite Version(2)

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
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
Abstract&Keyword Cite Version(2)

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
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