Comparative Study on the Macroscopic and Microscopic Properties of UHPC Mixed with Limestone Powder and Slag Powder
This paper explores the development laws of the fluidity, compressive strength, and autogenous shrinkage of ultrahigh performance cement (UHPC) mixed with limestone powder (LP) and highly active ground slag powder (SP). A microscopic analysis was conducted on the hydration products and pore structur...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2021/5510490 |
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| _version_ | 1850159574705766400 |
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| author | Menghui Yang Zhen He Xia Chen Mingxia Li Ziling Peng |
| author_facet | Menghui Yang Zhen He Xia Chen Mingxia Li Ziling Peng |
| author_sort | Menghui Yang |
| collection | DOAJ |
| description | This paper explores the development laws of the fluidity, compressive strength, and autogenous shrinkage of ultrahigh performance cement (UHPC) mixed with limestone powder (LP) and highly active ground slag powder (SP). A microscopic analysis was conducted on the hydration products and pore structures. Through quantitative research on the packing density and fractal dimension of particles in different systems, the relationship between particle characteristics and UHPC properties was established. As a result, the packing densities of the UHPC mixed solely with LP (binary system) and UHPC mixed with LP and silica fume (ternary system) are higher than those of UHPC mixed with the same amount of SP and the benchmark UHPC system; fractal dimension of particle size distribution is closely related to packing density. The LP-cement-silica fume ternary system was lowly hydrated, but it has a good grain composition and high density of slurry, which improved the compressive strength of UHPC. The compressive strength of UHPC mixed with 50% LP witnessed a more obvious decline than that of the ternary system and the one with the same amount of SP. The reason lies in the decrease in slurry due to a lack of sufficient active constituents, and the hydration products were far from enough to fill the pores in the system. LP can also inhibit autogenous shrinkage to the greatest degree for the LP-mixed binary system performed best in such inhibition. |
| format | Article |
| id | doaj-art-ae11cb0001ed4d1ea8bee42445c55344 |
| institution | OA Journals |
| issn | 1468-8115 1468-8123 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-ae11cb0001ed4d1ea8bee42445c553442025-08-20T02:23:28ZengWileyGeofluids1468-81151468-81232021-01-01202110.1155/2021/55104905510490Comparative Study on the Macroscopic and Microscopic Properties of UHPC Mixed with Limestone Powder and Slag PowderMenghui Yang0Zhen He1Xia Chen2Mingxia Li3Ziling Peng4Changjiang River Scientific Research Institute, Wuhan City, Hubei Province 430010, ChinaSchool of Water Resources and Hydropower Engineering, Wuhan University, Wuhan City, Hubei Province 430072, ChinaChangjiang River Scientific Research Institute, Wuhan City, Hubei Province 430010, ChinaChangjiang River Scientific Research Institute, Wuhan City, Hubei Province 430010, ChinaChangjiang River Scientific Research Institute, Wuhan City, Hubei Province 430010, ChinaThis paper explores the development laws of the fluidity, compressive strength, and autogenous shrinkage of ultrahigh performance cement (UHPC) mixed with limestone powder (LP) and highly active ground slag powder (SP). A microscopic analysis was conducted on the hydration products and pore structures. Through quantitative research on the packing density and fractal dimension of particles in different systems, the relationship between particle characteristics and UHPC properties was established. As a result, the packing densities of the UHPC mixed solely with LP (binary system) and UHPC mixed with LP and silica fume (ternary system) are higher than those of UHPC mixed with the same amount of SP and the benchmark UHPC system; fractal dimension of particle size distribution is closely related to packing density. The LP-cement-silica fume ternary system was lowly hydrated, but it has a good grain composition and high density of slurry, which improved the compressive strength of UHPC. The compressive strength of UHPC mixed with 50% LP witnessed a more obvious decline than that of the ternary system and the one with the same amount of SP. The reason lies in the decrease in slurry due to a lack of sufficient active constituents, and the hydration products were far from enough to fill the pores in the system. LP can also inhibit autogenous shrinkage to the greatest degree for the LP-mixed binary system performed best in such inhibition.http://dx.doi.org/10.1155/2021/5510490 |
| spellingShingle | Menghui Yang Zhen He Xia Chen Mingxia Li Ziling Peng Comparative Study on the Macroscopic and Microscopic Properties of UHPC Mixed with Limestone Powder and Slag Powder Geofluids |
| title | Comparative Study on the Macroscopic and Microscopic Properties of UHPC Mixed with Limestone Powder and Slag Powder |
| title_full | Comparative Study on the Macroscopic and Microscopic Properties of UHPC Mixed with Limestone Powder and Slag Powder |
| title_fullStr | Comparative Study on the Macroscopic and Microscopic Properties of UHPC Mixed with Limestone Powder and Slag Powder |
| title_full_unstemmed | Comparative Study on the Macroscopic and Microscopic Properties of UHPC Mixed with Limestone Powder and Slag Powder |
| title_short | Comparative Study on the Macroscopic and Microscopic Properties of UHPC Mixed with Limestone Powder and Slag Powder |
| title_sort | comparative study on the macroscopic and microscopic properties of uhpc mixed with limestone powder and slag powder |
| url | http://dx.doi.org/10.1155/2021/5510490 |
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