Abstract
The fresh, mechanical, and durability properties of the polypropylene fiber-reinforced mortar (PP FRM) and the basalt fiber-reinforced mortar (BFRM) with various fiber contents were tested in this paper. The test results show that the presence of polypropylene (PP) fiber and basalt fiber (BF) in the mortar reduces the initial slump flow and increases the slump flow loss rate. The bond strength and flexural strength of fiber-reinforced mortar (FRM) are improved, whereas no obvious improvement on the compressive strength has been observed. Compared with the control mortar, the bond strength of PP FRM and BFRM reinforced with 0.6 kg/m3, 1.6 kg/m3, and 2.6 kg/m3fiber increases by 16.60%–28.80% and 10.60%–21.40%, respectively. Furthermore, FRM shows lower drying shrinkage, superior abrasion resistance, water impermeability, and freeze-thaw resistance compared with the control mortar. The abrasion resistance strength of PP FRM and BFRM is 77.30% and 38.65% more than the control mortar with 2.6 kg/m3fiber content. Therefore, PP FRM and BFRM are suitable to be utilized as repair materials, especially in repairing hydraulic structures surfaces with excellent bond strength and abrasion resistance.
Highlights
Cement-based materials are one of the most widely used construction materials in the off-shore structures and marine structures due to their high compressive strength and low cost
It has been found that fiber-reinforced mortar (FRM) and fiber-reinforced concrete (FRC) show a marked improvement in toughness and impact resistance and are suitable to be utilized as repair materials, especially in repairing hydraulic structures surfaces
The workability of the fresh mortar was indicated by the initial slump flow of the material measured by a slump test according to EN 1015-3
Summary
Cement-based materials are one of the most widely used construction materials in the off-shore structures and marine structures due to their high compressive strength and low cost. Advances in Materials Science and Engineering some results about the effect of fibers on the properties of the cement-based materials have been established [20,21,22]. It has been found that FRM and FRC show a marked improvement in toughness and impact resistance and are suitable to be utilized as repair materials, especially in repairing hydraulic structures surfaces. Very few studies focus on the effect of fibers on fresh properties and durability properties of FRM and FRC, such as the abrasion resistance, which is one of the most significant requirements for hydraulic structures. A more comprehensive understanding about the effect of PP fiber and BF on the properties of the mortars was presented
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