Autolytic capsules incorporating alkali-activated slag system for self-healing cementitious composites

Xiang, Junchen; Qiu, Jingping; Wu, Pinqi; Zhang, Qingsong; Song, Yuying; Yang, Lei

doi:10.1016/j.cemconcomp.2024.105439

Cited by 6 publications

(2 citation statements)

References 57 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Due to the poor cracking and tensile resistance of concrete, scholars have been exploring new types of concrete to satisfy the requirements for practical engineering [12][13][14]. Some studies propose enhancing the overall tensile strength, impact toughness, and energyabsorbing capacity of concrete through the incorporation of fibers [15,16].…”

Section: Introductionmentioning

confidence: 99%

Effect of Expansion Agent and Glass Fiber on the Dynamic Splitting Tensile Properties of Seawater–Sea-Sand Concrete

Zhu,

Xiong,

Song

et al. 2024

Buildings

Self Cite

View full text Add to dashboard Cite

In marine structural engineering, the impact resistance of concrete holds high significance. The determination of whether the combined use of expansion agent (EA) and glass fiber (GF) has a synergistic effect on the impact resistance of seawater–sea-sand concrete (SSC) and plays a role in its performance and application. In this study, the dynamic Brazilian disc test at various strain rates was carried out with an SHPB device to investigate the effect of mixing 0% and 6% EA with 0% and 1% GF on the dynamic splitting tensile properties of SSC. The results show that strain rate effect on EA and GF-reinforced SSC during dynamic splitting tensile tests at higher strain rates, indicating strong strain rate sensitivity. The synergistic reinforcement of EA and GF consumed more energy under impact loading, thus maintaining the morphological integrity of concrete. However, the dynamic splitting tensile strength obtained in the Brazilian disc test had a significant overload effect which cannot be ignored. EA doped at 6% and GF doped at 1% showed a synergistic enhancement of SSC’s dynamic splitting tensile properties.

show abstract

Section: Introductionmentioning

confidence: 99%

Effect of Expansion Agent and Glass Fiber on the Dynamic Splitting Tensile Properties of Seawater–Sea-Sand Concrete

Zhu,

Xiong,

Song

et al. 2024

Buildings

Self Cite

View full text Add to dashboard Cite

show abstract

“…In recent years, the rapid development of infrastructure construction in coastal cities and island areas, coupled with the acceleration of urbanization, has led to an increasing demand for concrete [1,2]. However, the production process of concrete requires the consumption of a significant amount of natural resources, such as fresh water and river sand [3][4][5]. The excessive exploitation and use of these resources have resulted in a severe shortage and significant damage to the natural environment.…”

Section: Introductionmentioning

confidence: 99%

Bond–Slip Performance of Steel–Fiber-Reinforced Polymer Composite Bars (SFCBs) and Glass Fiber with Expansion-Agent-Reinforced Seawater Sea-Sand Concrete (GF-EA-SSSC) under Freezing–Thawing Environment

Li,

Jian,

Song

et al. 2024

Buildings

Self Cite

View full text Add to dashboard Cite

The combined application of steel–FRP composite bars (SFCBs) and seawater sea-sand concrete (SSSC) in marine engineering not only solves the problem of resource scarcity and reduces the construction cost but also avoids the problems of chloride corrosion of steel reinforcement in seawater sea-sand concrete and the lack of ductility of FRP bars. At the same time, the addition of glass fiber (GF) and expansion agent (EA) in appropriate amounts improves the crack resistance and seepage resistance of concrete. However, the durability of SFCB with GF- and EA-reinforced SSSC in freezing–thawing environment remains unclear, which limits its potential application in cryogenic marine engineering. This study investigates the bonding properties between SFCB and GF-EA-SSSC interfaces using eccentric pullout experiments under different thicknesses of concrete protective cover and a number of freezing–thawing cycles. The results showed that the compressive strength and dynamic elastic modulus of SSSC decrease, while the mass loss increases with an increasing number of freezing–thawing cycles. Additionally, the bond strength and stiffness between SFCB and SSSC decrease, leading to an increase in relative slip. However, the rate of bond strength and stiffness loss decreases with an increase in the thickness of the concrete protective cover. Furthermore, formulas for bond strength, relative slip, and bond stiffness are established to quantify the effects of the thickness of the concrete protective cover and the number of freezing–thawing cycles. The experimental values obtained verify the accuracy of these formulas, with a relative error of less than 5%. Moreover, a bond stress–slip constitutive model is developed for SFCB and GF-EA-SSSC, and the fitting results closely resemble the experimental values, demonstrating a high level of model fit.

show abstract

Immobilization capacity of element arsenic in alkali-activated slag-arsenic tailing system during self-healing process

Xiang,

Qiu,

Zou

et al. 2024

Cement and Concrete Composites

View full text Add to dashboard Cite

Autolytic capsules incorporating alkali-activated slag system for self-healing cementitious composites

Cited by 6 publications

References 57 publications

Effect of Expansion Agent and Glass Fiber on the Dynamic Splitting Tensile Properties of Seawater–Sea-Sand Concrete

Effect of Expansion Agent and Glass Fiber on the Dynamic Splitting Tensile Properties of Seawater–Sea-Sand Concrete

Bond–Slip Performance of Steel–Fiber-Reinforced Polymer Composite Bars (SFCBs) and Glass Fiber with Expansion-Agent-Reinforced Seawater Sea-Sand Concrete (GF-EA-SSSC) under Freezing–Thawing Environment

Immobilization capacity of element arsenic in alkali-activated slag-arsenic tailing system during self-healing process

Contact Info

Product

Resources

About