A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
The invention discloses carbonation-resistant basic magnesium sulfate cement. The carbonation-resistant basic magnesium sulfate cement is prepared from the following components in percentage by mass: 40 to 55% of magnesium oxide, 20 to 25% of magnesium sulfate heptahydrate, 10 to 20% of industrial waste residue powder, 5 to 9% of white slag, 3 to 8% of mineral admixtures, 2 to 4% of desulfurization gypsum, 6 to 8% of mineral slag, 2 to 4% of straws, 1 to 3% of silica fume and 1 to 3% of adjustable solidification agent. Proper additives are added in magnesium oxysulfate cement to form a novel basic magnesium oxysulfate phase; the carbonation-resistant basic magnesium sulfate cement with totally different property and performance from traditional magnesium oxysulfate cement is produced; the main hydration product of the basic magnesium sulfate cement is 517 crystal whisker; the carbonation-resistant basic magnesium sulfate cement is novel special cement with features of self-formed crystal whisker, high intensity, high toughness, high ratio of compressive strength, carbonation resistance, brine resistance, hydrothermal resistance, seawater corrosion resistance, shock resistance, antifatigue, corrosion of steel bar resistance, high durability and long service life.
The invention discloses carbonation-resistant basic magnesium sulfate cement. The carbonation-resistant basic magnesium sulfate cement is prepared from the following components in percentage by mass: 40 to 55% of magnesium oxide, 20 to 25% of magnesium sulfate heptahydrate, 10 to 20% of industrial waste residue powder, 5 to 9% of white slag, 3 to 8% of mineral admixtures, 2 to 4% of desulfurization gypsum, 6 to 8% of mineral slag, 2 to 4% of straws, 1 to 3% of silica fume and 1 to 3% of adjustable solidification agent. Proper additives are added in magnesium oxysulfate cement to form a novel basic magnesium oxysulfate phase; the carbonation-resistant basic magnesium sulfate cement with totally different property and performance from traditional magnesium oxysulfate cement is produced; the main hydration product of the basic magnesium sulfate cement is 517 crystal whisker; the carbonation-resistant basic magnesium sulfate cement is novel special cement with features of self-formed crystal whisker, high intensity, high toughness, high ratio of compressive strength, carbonation resistance, brine resistance, hydrothermal resistance, seawater corrosion resistance, shock resistance, antifatigue, corrosion of steel bar resistance, high durability and long service life.
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