Factors for increasing strength of composite materials based on fine high-calcium fly ash
Industrial high-calcium fly ashes obtained by burning Kansk-Achinsk coal at a thermal power plant and selected from different fields of electrostatic precipitators of an ash collecting plant were studied as the basis for composite binders (CB). The main factors influencing the properties of such CBs...
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| Language: | English |
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Ural Federal University
2022-07-01
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| Series: | Chimica Techno Acta |
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| Online Access: | https://chimicatechnoacta.ru/article/view/5937 |
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| author | Olga M. Sharonova Leonid A. Solovyov Alexander G. Anshits |
| author_facet | Olga M. Sharonova Leonid A. Solovyov Alexander G. Anshits |
| author_sort | Olga M. Sharonova |
| collection | DOAJ |
| description | Industrial high-calcium fly ashes obtained by burning Kansk-Achinsk coal at a thermal power plant and selected from different fields of electrostatic precipitators of an ash collecting plant were studied as the basis for composite binders (CB). The main factors influencing the properties of such CBs are the particle size, the concentration of superplasticizer at a water:binder (w/b) ratio of 0.25, and the proportion of HCFA in the mixture with cement. In particular, for cementless CBs at w/b 0.4, it was found that a change in the particle size d90 from 30 μm to 10 μm leads to an increase in compressive strength by more than 2 times – from 5.5–14 MPa to 11–36 MPa, accordingly, with a curing age of 3–300 days. The 0.12% additive of Melflux 5581F superplasticizer at w/b 0.25 increases the compressive strength – up to 14–32 MPa and up to 24–78 MPa, accordingly. The HCFA-cement blends were investigated in the range of 60–90% HCFA and the maximum compressive strength 77 MPa at 28 days of hardening was found at 80% HCFA. On the basis of 80% HCFA blend with the 0.3% addition of Melflux 5581F and 5% silica fume, the specimens of ultra-high strength (108 MPa at 28 days of hardening) were obtained. |
| format | Article |
| id | doaj-art-c81bfa1dd8d043b6b90a4b25aae40594 |
| institution | DOAJ |
| issn | 2411-1414 |
| language | English |
| publishDate | 2022-07-01 |
| publisher | Ural Federal University |
| record_format | Article |
| series | Chimica Techno Acta |
| spelling | doaj-art-c81bfa1dd8d043b6b90a4b25aae405942025-08-20T03:19:29ZengUral Federal UniversityChimica Techno Acta2411-14142022-07-019410.15826/chimtech.2022.9.4.074509Factors for increasing strength of composite materials based on fine high-calcium fly ashOlga M. Sharonova0Leonid A. Solovyov1Alexander G. Anshits2Institute of Chemistry and Chemical Technology SB RAS, Federal Research Center "Krasnoyarsk Science Center SB RAS"Institute of Chemistry and Chemical Technology SB RAS, Federal Research Center "Krasnoyarsk Science Center SB RAS"Institute of Chemistry and Chemical Technology SB RAS, Federal Research Center "Krasnoyarsk Science Center SB RAS"Industrial high-calcium fly ashes obtained by burning Kansk-Achinsk coal at a thermal power plant and selected from different fields of electrostatic precipitators of an ash collecting plant were studied as the basis for composite binders (CB). The main factors influencing the properties of such CBs are the particle size, the concentration of superplasticizer at a water:binder (w/b) ratio of 0.25, and the proportion of HCFA in the mixture with cement. In particular, for cementless CBs at w/b 0.4, it was found that a change in the particle size d90 from 30 μm to 10 μm leads to an increase in compressive strength by more than 2 times – from 5.5–14 MPa to 11–36 MPa, accordingly, with a curing age of 3–300 days. The 0.12% additive of Melflux 5581F superplasticizer at w/b 0.25 increases the compressive strength – up to 14–32 MPa and up to 24–78 MPa, accordingly. The HCFA-cement blends were investigated in the range of 60–90% HCFA and the maximum compressive strength 77 MPa at 28 days of hardening was found at 80% HCFA. On the basis of 80% HCFA blend with the 0.3% addition of Melflux 5581F and 5% silica fume, the specimens of ultra-high strength (108 MPa at 28 days of hardening) were obtained.https://chimicatechnoacta.ru/article/view/5937binderhigh-calcium fly ashsuperplasticizercompressive strengthphase composition |
| spellingShingle | Olga M. Sharonova Leonid A. Solovyov Alexander G. Anshits Factors for increasing strength of composite materials based on fine high-calcium fly ash Chimica Techno Acta binder high-calcium fly ash superplasticizer compressive strength phase composition |
| title | Factors for increasing strength of composite materials based on fine high-calcium fly ash |
| title_full | Factors for increasing strength of composite materials based on fine high-calcium fly ash |
| title_fullStr | Factors for increasing strength of composite materials based on fine high-calcium fly ash |
| title_full_unstemmed | Factors for increasing strength of composite materials based on fine high-calcium fly ash |
| title_short | Factors for increasing strength of composite materials based on fine high-calcium fly ash |
| title_sort | factors for increasing strength of composite materials based on fine high calcium fly ash |
| topic | binder high-calcium fly ash superplasticizer compressive strength phase composition |
| url | https://chimicatechnoacta.ru/article/view/5937 |
| work_keys_str_mv | AT olgamsharonova factorsforincreasingstrengthofcompositematerialsbasedonfinehighcalciumflyash AT leonidasolovyov factorsforincreasingstrengthofcompositematerialsbasedonfinehighcalciumflyash AT alexanderganshits factorsforincreasingstrengthofcompositematerialsbasedonfinehighcalciumflyash |