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Internal curing of Class-F fly-ash concrete using high-volume roof-tile waste aggregate
The aim of this study was to investigate the effect of a high volume of roof-tile waste coarse aggregate (5–13 mm) as an internal curing agent on the compressive strength, modulus of elasticity, pore structure, and hydration and pozzolanic reactions in paste of fly-ash concrete with a low water-to-binder ratio of 0.30. The fly-ash concrete specimens in which the replacement ratio of cement by Class-F fly ash was 40% by mass and that of normal coarse aggregate by roof-tile waste aggregate was 40% by volume, were cured up to 728 days. Internal curing with roof-tile waste aggregate increased the compressive strength of the fly-ash concrete by 8.4–16.5% and decreased the modulus of elasticity by 4.9–12.8%. The use of a high volume of waste aggregate decreased the volume of the capillary pores in the 0.01–10 µm range and the volume proportion of the 0.02–0.33-µm pores after 28 days, but increased the volume proportion of 0.003–0.02-µm pores slightly at 7 days and significantly up to 728 days, and the consumption of Ca(OH)2 in the fly-ash concrete. This roof-tile waste aggregate can be used as an internal water reservoir to increase the compressive strength and to improve the pore structure of concrete with a high-volume (40%) replacement of Class-F fly ash.
Internal curing of Class-F fly-ash concrete using high-volume roof-tile waste aggregate
The aim of this study was to investigate the effect of a high volume of roof-tile waste coarse aggregate (5–13 mm) as an internal curing agent on the compressive strength, modulus of elasticity, pore structure, and hydration and pozzolanic reactions in paste of fly-ash concrete with a low water-to-binder ratio of 0.30. The fly-ash concrete specimens in which the replacement ratio of cement by Class-F fly ash was 40% by mass and that of normal coarse aggregate by roof-tile waste aggregate was 40% by volume, were cured up to 728 days. Internal curing with roof-tile waste aggregate increased the compressive strength of the fly-ash concrete by 8.4–16.5% and decreased the modulus of elasticity by 4.9–12.8%. The use of a high volume of waste aggregate decreased the volume of the capillary pores in the 0.01–10 µm range and the volume proportion of the 0.02–0.33-µm pores after 28 days, but increased the volume proportion of 0.003–0.02-µm pores slightly at 7 days and significantly up to 728 days, and the consumption of Ca(OH)2 in the fly-ash concrete. This roof-tile waste aggregate can be used as an internal water reservoir to increase the compressive strength and to improve the pore structure of concrete with a high-volume (40%) replacement of Class-F fly ash.
Internal curing of Class-F fly-ash concrete using high-volume roof-tile waste aggregate
Bui, Phuong Trinh (author) / Ogawa, Yuko / Nakarai, Kenichiro / Kawai, Kenji / Sato, Ryoichi
2017
Article (Journal)
English
Fly ash , Operating Procedures, Materials Treatment , Theoretical and Applied Mechanics , Pore structure , Modulus of elasticity , Structural Mechanics , Concretes , Curing agents , Civil Engineering , Ashes , Internal curing , Porosity , Elasticity , Calcium hydroxide , Materials Science, general , Compressive strength , Engineering , Hydration , Curing , Building Materials , Concrete
Internal curing of Class-F fly-ash concrete using high-volume roof-tile waste aggregate
| Springer Verlag | 2017
Internal curing of Class-F fly-ash concrete using high-volume roof-tile waste aggregate
| British Library Online Contents | 2017
Internal curing of Class-F fly-ash concrete using high-volume roof-tile waste aggregate
| Online Contents | 2017
Compressive Strength of Concrete Containing Roof Tile Waste as Partial Fine Aggregate Replacement
| Trans Tech Publications | 2023