Nội dung của bài viết này nhằm trình bày nghiên cứu về tính chất cơ lý của bê tông cường độ cao sử dụng hỗn hợp phụ gia tro bay và silica fume. Để nắm chi tiết hơn nội dung, mời các bạn cùng tham khảo bài viết. | 88 Journal of Mining and Earth Sciences Vol. 61 Issue 6 2020 88 - 95 Research on the effects of fly ash and silica fume on some properties of high-strength concrete for the construction building of coastal areas Tang Van Lam 1 Nguyen Trong Dung 2 Dang Van Phi 3 Vu Kim Dien 4 Nguyen Van Duong 5 1 Falculty of Civil Engineering Hanoi University of Mining and Geology Vietnam 2 Department of Technology of Binder and Concrete National Research Moscow State Construction University Russia 3 Department of administration and basic construction College of Industrial and Constructional Vietnam ARTICLE INFO ABSTRACT Article history The sustainability of constructions depends on the resistance of concrete Received 14th Oct. 2020 and steel reinforcement to physical and chemical aggressors from the Accepted 28th Nov. 2020 environment. High strength concrete with a high consistency low Available online 31st Dec. permeability and resistance to environmental erosion is preferred to be 2020 used in infrastructure construction especially in coastal and islands Keywords areas. This paper aims to study on the mechanical properties of high- Coastal and islands strength concrete using a mixture of fly ash and silica fume additive. Experimental obtained results show that high-strength concrete Fly ash containing fly ash and silica fume with different mixing ratios have good High strength concrete performance spread 390 625 mm and slump 14 20 5cm and high Infrastructure projects compressive strength at 28 days 47 to 75MPa . In addition the Silica fume. protection time of steel reinforcement according to NT Build 356-2009 can reach 85 days for samples containing 10 silica fume. This result shows that the high-strength concrete made from a mixture of fly ash and silica fume can be used in coastal and island infrastructure. Copyright 2020 Hanoi University of Mining and Geology. All rights reserved. ___________ Corresponding author E - mail lamvantang@ DOI .
