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Effects of fibers on mechanical properties and freeze-thaw resistance of phosphogypsum-slag based cementitious materials
https://orcid.org/0000-0002-6563-9222
Highlights After 15 cycles of F-T cycling, PGS with fibers had a weight loss less than those without fibers. The losses in flexural strength and anti-impact work of PGS are due to water softening reduced. Major hydration products in PGS are C-S-H and AFt. They may be a major cause during PGS expansion. At optimal fiber content, performance of PGS with PP fiber is better than mineral and glass fibers.
Abstract Cementitious materials made primarily with phosphogypsum (PG) and ground-granulated blast-furnace slag (GGBFS, or slag) are studied. Mineral, glass and polypropene (PP) fibers with various dosages are incorporated into this PG-slag (PGS) system. The anti-impact work, flexural strength, and freeze-thaw (F-T) resistance of these fiber-reinforced PGS mixes are evaluated, and the microstructures of these fiber-reinforced PGS mixes are also examined. The results show that addition of any of these fibers can significantly increase the flexural strength, anti-impact work, water resistance, and freezing-thawing resistance of PGS. Among the three fibers studied, the PP fiber is the easiest to disperse, and it also has a good bond with the PGS matrix. Addition of 1.35% (by volume) of the PP fiber has increased the flexural strength of the PGS twice and increased the anti-impact work up to 7 times. At the optimal fiber content, the PP fiber provides a better overall performance than mineral and glass fibers.
Effects of fibers on mechanical properties and freeze-thaw resistance of phosphogypsum-slag based cementitious materials
https://orcid.org/0000-0002-6563-9222
Highlights After 15 cycles of F-T cycling, PGS with fibers had a weight loss less than those without fibers. The losses in flexural strength and anti-impact work of PGS are due to water softening reduced. Major hydration products in PGS are C-S-H and AFt. They may be a major cause during PGS expansion. At optimal fiber content, performance of PGS with PP fiber is better than mineral and glass fibers.
Abstract Cementitious materials made primarily with phosphogypsum (PG) and ground-granulated blast-furnace slag (GGBFS, or slag) are studied. Mineral, glass and polypropene (PP) fibers with various dosages are incorporated into this PG-slag (PGS) system. The anti-impact work, flexural strength, and freeze-thaw (F-T) resistance of these fiber-reinforced PGS mixes are evaluated, and the microstructures of these fiber-reinforced PGS mixes are also examined. The results show that addition of any of these fibers can significantly increase the flexural strength, anti-impact work, water resistance, and freezing-thawing resistance of PGS. Among the three fibers studied, the PP fiber is the easiest to disperse, and it also has a good bond with the PGS matrix. Addition of 1.35% (by volume) of the PP fiber has increased the flexural strength of the PGS twice and increased the anti-impact work up to 7 times. At the optimal fiber content, the PP fiber provides a better overall performance than mineral and glass fibers.
Effects of fibers on mechanical properties and freeze-thaw resistance of phosphogypsum-slag based cementitious materials
https://orcid.org/0000-0002-6563-9222
Highlights After 15 cycles of F-T cycling, PGS with fibers had a weight loss less than those without fibers. The losses in flexural strength and anti-impact work of PGS are due to water softening reduced. Major hydration products in PGS are C-S-H and AFt. They may be a major cause during PGS expansion. At optimal fiber content, performance of PGS with PP fiber is better than mineral and glass fibers.
Abstract Cementitious materials made primarily with phosphogypsum (PG) and ground-granulated blast-furnace slag (GGBFS, or slag) are studied. Mineral, glass and polypropene (PP) fibers with various dosages are incorporated into this PG-slag (PGS) system. The anti-impact work, flexural strength, and freeze-thaw (F-T) resistance of these fiber-reinforced PGS mixes are evaluated, and the microstructures of these fiber-reinforced PGS mixes are also examined. The results show that addition of any of these fibers can significantly increase the flexural strength, anti-impact work, water resistance, and freezing-thawing resistance of PGS. Among the three fibers studied, the PP fiber is the easiest to disperse, and it also has a good bond with the PGS matrix. Addition of 1.35% (by volume) of the PP fiber has increased the flexural strength of the PGS twice and increased the anti-impact work up to 7 times. At the optimal fiber content, the PP fiber provides a better overall performance than mineral and glass fibers.
Effects of fibers on mechanical properties and freeze-thaw resistance of phosphogypsum-slag based cementitious materials
Hua, Sudong (author) / Wang, Kejin (author) / Yao, Xiao (author) / Xu, Wen (author) / He, Yuxin (author)
Construction and Building Materials ; 121 ; 290-299
2016-06-01
10 pages
Article (Journal)
Electronic Resource
English
| British Library Online Contents | 2016
| British Library Online Contents | 2016
| British Library Online Contents | 2016