Abstract
This paper reports the results of a research study aimed at identifying the compositional features of fly ash (FA) TPP “Pha Lai” (Vietnam), silica fume SF-90 (SF90) and superplasticizer SilkRoad SR 5000F (SR5000) contents that influence the sulfate resistance of corrosion-resistant concrete. The effect of FA, SF90 and SR5000 on the strength of corrosion-resistant concrete is obtained quickly, high early-strength concrete. In details, the compressive strength at the age of 1 and 3 days are respectively 29.6% and 61.13% in comparison to 28 days period. The deformation of corrosion-resistant concrete prisms in 5% sodium sulfate solution after 28 days of testing were determined by Russian standard GOST P 56687-2015. Using the mathematical planning method for four factors and the Matlab computer programs was obtained the mathematical model, which was adequately described the influence ofthe water-binding ratio, FA, SF90 and SR5000 contents on the concrete deformation. It was also noted that the effect of FA content is more pronounced than the water-binding ratio and content SF90. In addition, the effect of SR5000 content on the deformation of concrete is negligible, so it was discarded.
Highlights
In the construction world the 21st century will be known as the century of concrete in the oceans
The mix ingredients placed in the mixer was in the following order; dry aggregates, cement, fly ash and Silica Fume were mixed in the mixer for 5 minutes chemical additives and water were added gradually in 30 seconds and the mixing continued for 10 minutes
The corrosion-resistant concrete was obtained with 72.3 MPa compressive strength and 6.15 MPa tensile strength at 28 day age of normal hardening
Summary
In the construction world the 21st century will be known as the century of concrete in the oceans. Cracking of concrete and corrosion are a major concern for all offshore projects. Vietnam, located in tropical climate area, has strong differentiation between the rainy season and the dry season. This country stretches lengthen from the North to the South, with a coastline of 3260 km long.
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