Lightweight self-compacting concrete with sintered fly-ash aggregate
The article presents the results of research assessing the possibility of making LWSCC from the locally produced sintered fly ash aggregate CERTYD. Two methods of preliminary LWA preparation were applied: pre-soaking with water and coating with a film of cement paste. The following properties of fre...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Warsaw University of Life Sciences
2018-09-01
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| Series: | Przegląd Naukowy Inżynieria i Kształtowanie Środowiska |
| Subjects: | |
| Online Access: |
http://iks.pn.sggw.pl/PN81/A9/art9.pdf
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| Summary: | The article presents the results of research assessing the possibility of making LWSCC from the locally produced sintered fly ash aggregate CERTYD. Two methods of preliminary LWA preparation were applied: pre-soaking with water and coating with a film of cement paste. The following properties of fresh LWSCC were evaluated: slump-flow, time T500 and passing ability using L-Box. Partial replacement of natural sand by fine LW sand (0/0.5 mm) improved filling and passing abilities of fresh concrete, reduced slightly the bulk density, but it resulted in compressive strength loss by 12-18%. In terms of both fresh and hardened concrete properties it is more favorable to use only fine LW sand as natural sand replacement. Considering fresh concrete properties paste impregnation of LW aggregate is more efficient than saturation with water. |
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| ISSN: | 1732-9353 2543-7496 |