Fracture Behavior of Steel Slag Powder-Cement-Based Concrete with Different Steel-Slag-Powder Replacement Ratios

Zhuo, Ke-Xian; Liu, Guotao; Lan, Xue-Wei; Zheng, Dong-Ping; Wu, Si-Quan; Wu, Pei-Zong; Guo, Yong; Lin, Jia-Xiang

doi:10.3390/ma15062243

Cited by 14 publications

(6 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is consistent with the relevant rules of P ini in Section 3.3.2 , as the initial fracture toughness is mainly determined by P ini , and the difference in specimen quality only changes the cracking toughness by a small amount between different doping levels. As the initial fracture toughness is influenced by the ITZ strength [ 42 ], the bridging effect of BF increases the strength of ITZ during the crack initiation stage, which inhibits the rapid development of initiating cracks, to some extent. In addition, the maximum unstable fracture toughness of B-0.4 and B-0.6 groups was 1.169 and 1.672 MPa·m 1/2 at strain rates of 10 −5 s −1 and 10 −3 s −1 , respectively.…”

Section: Resultsmentioning

confidence: 99%

Fracture Behavior of Basalt Fiber-Reinforced Airport Pavement Concrete at Different Strain Rates

Xia

Yan

et al. 2022

Materials

View full text Add to dashboard Cite

As a commonly used surface structure for airport runways, concrete slabs are subjected to various complex and random loads for a long time, and it is necessary to investigate their fracture performance at different strain rates. In this study, three-point bending fracture tests were conducted using ordinary performance concrete (OPC) and basalt fiber-reinforced airport pavement concrete (BFAPC) with fiber volume contents of 0.2, 0.4, and 0.6%, at five strain rates (10−6 s−1, 10−5 s−1, 10−4 s−1, 10−3 s−1, and 10−2 s−1). Considering parameters such as the peak load, initial cracking load, double K fracture toughness, fracture energy, and critical crack expansion rate, the effects of the fiber volume content and strain rate on the fracture performance of concrete were systematically studied. The results indicate that these fracture parameters of OPC and BFAPC have an obvious strain rate dependence; in particular, the strain rate has a positive linear relationship with peak load and fracture energy, and a positive exponential relationship with the critical crack growth rate. Compared with OPC, the addition of basalt fiber (BF) can improve the fracture performance of airport pavement concrete, to a certain extent, where 0.4% and 0.6% fiber content were the most effective in enhancing the fracture properties of concrete under strain rates of 10−6–10−5 s−1 and 10−4–10−2 s−1, respectively. From the point of view of the critical crack growth rate, it is shown that the addition of BF can inhibit the crack growth of concrete. In this study, the fracture properties of BFAPC were evaluated at different strain rates, providing an important basis for the application of BFAPC in airport pavement.

show abstract

Section: Resultsmentioning

confidence: 99%

Fracture Behavior of Basalt Fiber-Reinforced Airport Pavement Concrete at Different Strain Rates

Xia

Yan

et al. 2022

Materials

View full text Add to dashboard Cite

show abstract

“…Samples 5# and 7# had obvious spatial mesh structures, which could be ascribed to the fact that the increase of the C-S-H gel system would make the surface of dehydrated SSMP particles wrapped in hydration products. Compared to sample 5#, sample 10# had fewer reticular structures, more C-S-H, finer SSMP, higher hydration, and higher compressive strength [31,32]. As shown in Figure 5, the main hydration products of the four samples were calcium hydroxide (portlandite) and gel (calcium-silicate-hydrate).…”

Section: Microscopic Analysis Of Foamed Lightweight Soilmentioning

confidence: 99%

Features of Processes for Preparation and Performance of Foamed Lightweight Soil with Steel Slag Micronized Powder and Granulated Blast Furnace Slag

Liu,

Li,

et al. 2024

Processes

View full text Add to dashboard Cite

Steel slag micronized powder, granulated blast furnace slag, and cement were used as cementitious materials to prepare a foamed lightweight soil for roadbed filling to reduce the settlement and additional stress of the foundation and to solve the environmental problems caused by the storage of large amounts of steel slag. However, the instability of steel slag and the multi-angular nature of its surface limit the resource utilization of steel slag. Currently, concrete technology is unable to achieve a large amount of steel slag. Therefore, it is necessary to deeply explore the influence of steel slag content and the specific surface area of steel slag on the working performance, compressive strength, durability, and micro-mechanism of foam light soil. Through the modification of steel slag and the improvement of the production process, the preparation of foam light soil with a large amount of steel slag can be realized. In this study, the foamed lightweight soil with 1.0 Mpa was prepared by cementitious materials composed of 40% cement and 60% multi-mixture of steel slag micronized powder and granulated blast furnace slag. The study of SEM images and BET demonstrated that the larger specific surface area of steel slag powder was more conducive to improving the durability of the foamed lightweight soil. Meanwhile, XRD analyses confirmed that the reactions of f-CaO and f-MgO in steel slag were slowly released in the porous foamed lightweight soil system, which compensated for the shrinkage properties of porous materials. When the SSMP content was 0%, the shrinkage rate was 2.34 × 10−3, while when the SSMP content was 60%, the shrinkage rate was only 0.54 × 10−3. Furthermore, our study of the hydration process of samples indicated that the strong alkalinity of steel slag micronized powder hydration was helpful to stimulate the potential activity of the slag powder, which was beneficial to the improvement of the compressive strength of foamed lightweight soil. Thus, this study provides a valuable idea for reducing the settlement and additional stress of the original foundation and for solving the environmental problems caused by a large amount of steel slag storage.

show abstract

“…In this paper, the seven groups of RuAAC were prepared and named SFa-Rb, where a and b represent the volume content of RSFs (1-3%) and the rubber content (0-50%), respectively. The fiber content of 1-3% adopted in this study was generally used in previous studies [4,17,40]. The rubber content was limited to below 50% because an excessively high rubber content will lead to poor workability based on trial-and-error experiments and existing studies [4,43].…”

Section: Materials and MIX Proportionmentioning

confidence: 99%

“…However, continuous growth in the demand for natural aggregates (NAs) in concrete places significant pressure on resources and the environment. Utilizing construction waste, discarded tires, and other solid wastes to produce recycled concrete aggregates (RCAs) as substitutes for NAs can alleviate the demand for NAs in construction and reduce environmental pollution [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Impact Resistance of Rubberized Alkali-Activated Concrete Incorporating Recycled Aggregate and Recycled Steel Fiber

Che,

Li,

Chen

et al. 2024

Buildings

View full text Add to dashboard Cite

Alkali-activated concrete (AAC) features excellent mechanical properties and sustainability. The incorporation of crumb rubber (CR), recycled concrete aggregates (RCAs), and recycled steel fibers (RSFs) can further enhance environmental sustainability. This paper mainly investigated the dynamic behaviors of a novel rubberized AAC incorporating RCAs and RSFs (RuAAC) through Split-Hopkinson Pressure Bar (SHPB) tests. The variables included three types of RSF content (1%, 2% and 3%), five types of rubber content (0%, 5%, 20%, 35% and 50%) and five impact pressures (0.5 MPa, 0.6 MPa, 0.7 MPa, 0.8 MPa and 0.9 MPa). Dynamic stress–strain curves, dynamic strength, the dynamic increase factor (DIF), impact toughness and the synergistic effects of RSF and CR were discussed. The results show that increasing RSF and CR contents could improve the impact resistance of RuAAC under impact loading. The RuAAC exhibited significant strain rate sensitivity, and the sensitivity increased with larger contents of RSF and CR. The increase in strain rate sensitivity was more pronounced with higher CR contents, which was reflected in larger dynamic increase factor (DIF) values. Under high impact pressure, the impact toughness was obviously enhanced with higher RSF contents, while the contribution of increased CR content to impact toughness was not apparent, which may be attributed to the fact that this study only calculated the integral under the dynamic stress–strain curve before the peak stress to determine impact toughness, neglecting the potential contribution of CR particles after the peak point. The obvious strain sensitivity exhibited by the RuAAC in the SHPB tests indicated superior impact performance, making it particularly suitable for architectural structures prone to seismic or explosive impacts.

show abstract

Fracture Behavior of Steel Slag Powder-Cement-Based Concrete with Different Steel-Slag-Powder Replacement Ratios

Cited by 14 publications

References 46 publications

Fracture Behavior of Basalt Fiber-Reinforced Airport Pavement Concrete at Different Strain Rates

Fracture Behavior of Basalt Fiber-Reinforced Airport Pavement Concrete at Different Strain Rates

Features of Processes for Preparation and Performance of Foamed Lightweight Soil with Steel Slag Micronized Powder and Granulated Blast Furnace Slag

Impact Resistance of Rubberized Alkali-Activated Concrete Incorporating Recycled Aggregate and Recycled Steel Fiber

Contact Info

Product

Resources

About