Utilizing Fiber Reinforced Concrete as the Concrete Face of Rockfill Dams

Salajegheh, Payam; Habibagahi, Ghassem; Sahraeian, S. Mohammad Sadegh

doi:10.1007/s12205-019-2058-y

Cited by 4 publications

(2 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The high crack resistance is a typical feature of the well-designed face slab concrete. Some materials, such as fly ash 10 , fibers 1,2,11 and MgO expansive agent 12,13 are commonly used to improve the crack resistance of face slab concrete. Besides, the shrinkage-reducing admixtures (SRA) are widely reported to effectively decrease the shrinkage of concrete [14][15][16] .…”

Section: Introductionmentioning

confidence: 99%

Comparison of Fly Ash, Pva Fiber, Mgo and Shrinkage-Reducing Admixture on the Frost Resistance of Face Slab Concrete via Pore Structural and Fractal Analysis

et al. 2021

View full text Add to dashboard Cite

Face slab concrete suffers from serious frost damage in cold regions in China, how to improve the frost resistance of face slab concrete in cold regions is one of the important issues in concrete faced rockfill dam (CFRD) design and construction. The results in this paper indicate that the frost resistance of concrete can be improved by adding fly ash, fiber, MgO and shrinkage-reducing admixtures (SRA), and the efficiency is in the sequence: (fly ash + fiber) > fiber > fly ash > MgO > SRA. The incorporation of 0.8 kg/m 3 PVA fiber and 20 wt% fly ash together enhances the compressive strength and tensile capacity of concrete by 6-7 % at late age, whereas the addition of 6 wt% MgO or 1 wt% SRA reduces the compressive strength and tensile capacity by about 4-10 % at various ages. The Ds of concrete added with fly ash, fiber, MgO and SRA is within the range of 2.619-2.796. The frost resistance of concrete correlates linearly with the air void parameters, pore structures and Ds. The utilization of fly ash and/or PVA fiber refines and optimizes the pore structure, thus increasing Ds and improving the frost resistance. On the contrary, MgO and SRA in this study are less effective in refining the pores than PVA fiber and fly ash, thereby producing smaller Ds and relatively weaker frost resistance.

show abstract

Section: Introductionmentioning

confidence: 99%

Comparison of Fly Ash, Pva Fiber, Mgo and Shrinkage-Reducing Admixture on the Frost Resistance of Face Slab Concrete via Pore Structural and Fractal Analysis

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Concrete has been used in many practical projects because it is cheap and easy to make [20]. However, concrete has low tensile strength, is heavy, cracks easily, and has poor durability properties [21,22]. Hence, these characteristics make some engineered concrete structures vulnerable to damage [23,24].…”

Section: Introductionmentioning

confidence: 99%

Effect of Desert Sand on the Section Bonding Properties of Polyethylene Fiber−Engineered Cementitious Composites

et al. 2023

View full text Add to dashboard Cite

Xinjiang is in northwest China and has abundant desert sand. Replacing natural sand with sand from deserts is an urgent need and could be used in making polyethylene fiber−engineered cementitious composite (PE−ECC). The interfacial bonding properties of desert sand PE−ECC (DSPE−ECC) were made using the optimal mix proportion (30% desert sand content, 2% fiber volume) and the laboratory’s previous research results. Normal sand PE−ECC (NSPE−ECC) and DSPE-ECC at different test ages (3, 7, 14, and 28 days) were subjected to uniaxial tensile tests, and a method for determining bonding properties is proposed. Scanning electron microscopy and X-ray diffraction were used to analyze the development of PE-ECC fiber and matrix and the formation of hydration products. The results indicated that the cracking loads of the DSPE-ECC at 3, 7, 14, and 28 days increased by 16.72%, 28%, 23.23%, and 10.05%, respectively. Desert sand had low water content and high water absorption, which slowed down the rate of C2S, C3S combining with water molecules to form C−S−H, and had a great influence on the bonding properties of ECC at 3 days. However, the bonding properties of DSPE−ECC were only slightly less than those of NSPE−ECC at 28 days, and the bonding properties had gradually stabilized. Therefore, the addition of desert sand enhanced the fiber/matrix’s bonding properties, and the bonding properties stablized with the increase in curing ages.

show abstract

High modulus partition deformation control of high concrete face rockfill dam

Qu,

Chai,

2024

European Journal of Environmental and Civil Engineering

View full text Add to dashboard Cite

Utilizing Fiber Reinforced Concrete as the Concrete Face of Rockfill Dams

Cited by 4 publications

References 13 publications

Comparison of Fly Ash, Pva Fiber, Mgo and Shrinkage-Reducing Admixture on the Frost Resistance of Face Slab Concrete via Pore Structural and Fractal Analysis

Comparison of Fly Ash, Pva Fiber, Mgo and Shrinkage-Reducing Admixture on the Frost Resistance of Face Slab Concrete via Pore Structural and Fractal Analysis

Effect of Desert Sand on the Section Bonding Properties of Polyethylene Fiber−Engineered Cementitious Composites

High modulus partition deformation control of high concrete face rockfill dam

Contact Info

Product

Resources

About