THE INTERACTIONS BETWEEN ANTI-FOAMING AND SUPERPLASTICIZING ADMIXTURES AND THEIR CONSEQUENCE FOR PROPERTIES OF SELF-COMPACTING MORTAR AND CONCRETE
07 ene 2020
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Categoría del artículo: research-article
Publicado en línea: 07 ene 2020
Páginas: 61 - 71
Recibido: 05 jul 2019
Aceptado: 29 oct 2019
DOI: https://doi.org/10.21307/acee-2019-052
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© 2019 Beata ŁAŹNIEWSKA-PIEKARCZYK., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
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AFA components
| Symbol of AFA (A) | AFA characteristic |
|---|---|
| A1 | froth breaker based on PDMS / silicone oil / hydrophobic silica |
| A2 | froth breaker based on mineral oil or amidol wax |
| A3 | froth breaker based on alcohol derivative of saturated fatty alcohol, mineral oil and PE wax |
| A4 | fiakyl derivative of saturated fatty alcohol/mineral oil/PE and amidol wax |
| A5 | alkoxyl derivative of fatty alcohol |
| A6 | polyether modified silicone |
Visual evaluation of admixtures after a compatibility test
| Symbol of the blend of ad-mixture PCP1 (P) and AFA (A) | The appearance of the samples after a week |
|---|---|
| P1 | homogeneous, clear |
| P1 A1a, b | homogeneous, clear |
| P1 A2a, b | homogeneous, clear |
| P1 A3a, b | homogeneous, clear |
| P1A4a, b | homogeneous, clear |
| P1A5a, b | homogeneous, clear |
| P1A6a, b | homogeneous, clear |
| P2A1a, b | turbid, heterogeneous, white particles in the entire volume |
| P2A2a, b | turbid, heterogeneous, white particles in the entire volume |
| P2A3a, b | turbid, heterogeneous, white particles in the entire volume |
| P2A4a, b | turbid, heterogeneous, white particles in the entire volume |
| P2A5a, b | turbid, heterogeneous, white particles in the entire volume |
| P2A6a, b | homogeneous, clear |
Compilation of the ingredient’s proportions in 1 m3 of the concrete mixture
| Symbol | Cement type | Cement [kg] | Lime-stone [% m.C] | w/b | 0÷2 mm [kg] | 2÷8 mm [kg] | 8÷16 mm [kg] | PCP1 [%m.C.] | AFA type 6 [%m.C.] |
|---|---|---|---|---|---|---|---|---|---|
| P1 | CEM II/B-S 42.5 R | 580 | 10 | 0.38 | 930 | 500 | 230 | 0.70 | – |
| P2 | 580 | 10 | 0,38 | 930 | 500 | 230 | 0.70 | – | |
| P1A6a | 580 | 10 | 0.38 | 930 | 500 | 230 | 0.70 | 0.50 | |
| P1A6a/b | 580 | 10 | 0.38 | 930 | 500 | 230 | 0.70 | 1.00 | |
| P1A6b | 580 | 10 | 0.38 | 930 | 500 | 230 | 0.70 | 1.50 |
Mixture composition of mortars
| Component/symbol of the mortar | Amount |
|---|---|
| CEM II/B-S 42.5 R, kg | 774.3 |
| Limestone, kg | 77.4 |
| River sand, kg | 1224.5 |
| w/c, – | 0.38 |
| PCP 1 (P1), % mass of cement | 0.70 |
| PCP 2 (P2), % mass of cement | 0.70 |
| P1A1a | 0.50 |
| P1A1b | 1.50 |
| P1A2a | 0.50 |
| P1A2b | 1.50 |
| P1A3a | 0.50 |
| P1A3b | 1.50 |
| P1A4a | 0.50 |
| P1A4b | 1.50 |
| P1A5a | 0.50 |
| P1A5b | 1.50 |
| P1A6a | 0.50 |
| P1A6b | 1.50 |
| P2A6a | 0.50 |