Mechanical properties of basalt and polypropylene fibre-reinforced alkali-activated slag concrete

Zhou, Xiaoming; Zeng, Yusheng; Pang, Chao; Jiao, Zhenzhen; Zheng, Wenzhong

doi:10.1016/j.conbuildmat.2020.121284

Cited by 53 publications

(11 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In their experiment, Rostami et al used longer PP fibers of 48 mm. Similar observations were made by Zhou et al [65] who reported that PP improved the flexural strength of concrete. Unfortunately, the tests were carried out on another type of fiber with a maximal length of 18 mm.…”

Section: Discussionsupporting

confidence: 89%

Influence of Fiber Addition on the Properties of High-Performance Concrete

et al. 2021

View full text Add to dashboard Cite

High performance fiber-reinforced concrete (HPFRC) has been frequently investigated in recent years. Plenty of studies have focused on different materials and types of fibers in combination with the concrete matrix. Experimental tests show that fiber dosage improves the energy absorption capacity of concrete and enhances the robustness of concrete elements. Fiber reinforced concrete has also been illustrated to be a material for developing infrastructure sustainability in RC elements like façade plates, columns, beams, or walls. Due to increasing costs of the produced fiber reinforced concrete and to ensure the serviceability limit state of construction elements, there is a demand to analyze the necessary fiber dosage in the concrete composition. It is expected that the surface and length of used fiber in combination with their dosage influence the structure of fresh and hardened concrete. This work presents an investigation of the mechanical parameters of HPFRC with different polymer fiber dosage. Tests were carried out on a mixture with polypropylene and polyvinyl alcohol fiber with dosages of 15, 25, and 35 kg/m3 as well as with control concrete without fiber. Differences were observed in the compressive strength and in the modulus of elasticity as well as in the flexural and splitting tensile strength. The flexural tensile strength test was conducted on two different element shapes: square panel and beam samples. These mechanical properties could lead to recommendations for designers of façade elements made of HPFRC.

show abstract

Section: Discussionsupporting

confidence: 89%

Influence of Fiber Addition on the Properties of High-Performance Concrete

et al. 2021

View full text Add to dashboard Cite

show abstract

“…The specimen size used for the prism compressive strength test was 100 mm Â 100 mm Â 300 mm, as per GB/T 50081-2002. 37 The prism compressive strength (obtained from our previous experiments 38 ), stress-strength ratios, and corresponding loading values are listed in Table 5. As shown in Figure 1c,d, a creep apparatus was used for the creep tests, as per GB/T 50082-2009.…”

Section: Methodsmentioning

confidence: 99%

Effect of fiber content and stress–strength ratio on the creep of basalt fiber–reinforced alkali‐activated slag concrete

Zhou

Zheng

Zeng

et al. 2021

Structural Concrete

Self Cite

View full text Add to dashboard Cite

Alkali‐activated materials are increasingly being used in practical applications as potential alternatives to Portland cement. If alkali‐activated slag (AAS) is to be applied to prestressed engineering and large‐size structures, it is necessary to study the creep performance of AAS. Existing studies have found that the creep of AAS concrete is larger than that of ordinary Portland cement (OPC) concrete, and adding fiber is an effective way to overcome this defect. In this study, we investigated the creep of basalt fiber–reinforced AAS (FRAAS) concrete for fiber contents ranging from 0% to 0.9% (by volume) at a stress–strength ratio of 0–0.6. After analyzing the experimental results, it was found that the basalt FRAAS concrete had no obvious linear creep range. It was observed that with an increase in the fiber content, the inhibition effect of fiber on creep became stronger initially and then weaker. The inhibitory effect of fiber on creep was strengthened by the increase in the stress–strength ratio. The creep coefficient showed no obvious change when the fiber content was in the range of 0%–0.9%. Based on the existing OPC concrete creep models, a method for predicting the creep of basalt FRAAS concrete was proposed.

show abstract

“…Table 1 presents the mix proportions for PP-FRC, and Table 2 shows the basic mechanical properties of PP fibers. Many scholars [32][33][34][35][36][37][38] have studied the variation of PP-FRC flexural strength and tensile strength with fiber volume fraction and obtained different results as shown in Figure 1. When the fiber volume fraction is appropriate (0.18%-0.45%), PP fibers have a significant improvement effect on the crack resistance of concrete.…”

Section: Materials Propertiesmentioning

confidence: 99%

Study on bending failure and crack characteristics in ductile fiber‐reinforced concrete beams

Wang,

He,

Zhou

et al. 2024

Structural Concrete

View full text Add to dashboard Cite

In this study, we designed six polypropylene fiber‐reinforced concrete (PP‐FRC) beams and three reinforced concrete (RC) beams for experimental studies. Then, we analyzed the effects of incorporating PP fibers on the cracking performance of PP‐FRC beams from the perspectives of load‐displacement response, crack distribution, crack depth, crack width, crack spacing, and deformation coordination. The research results showed that the cracking load and number of cracks were positively correlated with the volume ratio of PP fibers, while the maximum crack width, average crack spacing, and average crack depth were negatively correlated with the volume ratio of PP fibers. Due to the bridging effect of fibers, the PP‐FRC beam body and reinforcement could deform in a coordinated manner within a specific loading range after cracking, which increased the deformation coordination ability between the body and reinforcement. In this study, the cracking mechanism of PP‐FRC beams was investigated. Firstly, the formula for calculating the cracking moment of PP‐FRC beams was derived from the perspective of equivalent bending tensile strength. Then, based on the fiber bridging law and the bond strength between PP‐FRC and reinforcement, theoretical formulas were proposed to predict the average crack spacing and maximum crack width of PP‐FRC beams. Finally, through comparison, it was found that the proposed formulas could be used for characteristic crack prediction.

show abstract

Mechanical properties of basalt and polypropylene fibre-reinforced alkali-activated slag concrete

Cited by 53 publications

References 26 publications

Influence of Fiber Addition on the Properties of High-Performance Concrete

Influence of Fiber Addition on the Properties of High-Performance Concrete

Effect of fiber content and stress–strength ratio on the creep of basalt fiber–reinforced alkali‐activated slag concrete

Study on bending failure and crack characteristics in ductile fiber‐reinforced concrete beams

Contact Info

Product

Resources

About