Preparation of composite high-expansion cementing material by using industrial slag and preparation technique thereof
A technology of industrial waste residue and cementitious material, applied in cement production and other directions, can solve the problems of environmental pollution, slow setting time, high production cost, etc., and achieve high economic and environmental benefits, high expansion hole filling capacity, high binding water effect of ability
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Embodiment 1
[0012] The specific components of the cementitious material of the present invention and the preparation process thereof are as follows: 50% of the fly ash of the first component, 30% of the lime of the second component, and 20% of the gypsum of the third component are mixed uniformly, and the Cured under steam conditions for 7 days, during which it was ground for 3 hours a day to increase the reaction rate, and then subjected to high-temperature calcination at 400°C, and then ground to a specific surface area of 200-500m 2 / kg to obtain component (i); respectively dry calcium carbide slag and phosphogypsum and grind until the specific surface area is 200-500m 2 / kg to obtain component (ii) and component (iii) respectively. Mix 60% of component (i), 20% of component (ii) and 20% of component (iii) evenly to obtain a composite high-expansion gel material.
Embodiment 2
[0014] Mix 30% slag or steel slag, 50% calcium carbide slag, and 20% gypsum evenly, and maintain it under steam at 80°C for 3 days, grinding for 1 hour a day to increase the reaction rate, and then calcining at 450°C , and then ground to a specific surface area of 300m 2 / kg to obtain component (i); dry lime and phosphogypsum respectively, and grind them until the specific surface area is 300m 2 / kg to obtain component (ii) and component (iii) respectively. Mix 70% of component (i), 10% of component (ii) and 20% of component (iii) evenly to obtain a composite high-expansion gel material.
Embodiment 3
[0016] Mix 40% of coal gangue, 50% of alkali slag, and 10% of gypsum evenly, and maintain it under steam conditions at 100°C for 5 days, during which it is ground for 1.5 hours a day to increase the reaction rate, and then undergoes high-temperature calcination at 550°C. Then grind to a specific surface area of 400m 2 / kg to obtain component (i); dry the slag or steel slag and grind it to a specific surface area of 400m 2 / kg to obtain component (ii); dry the phosphogypsum and grind it to a specific surface area of 400m 2 / kg to obtain component (iii). Mix 60% of component (i), 30% of component (ii) and 10% of component (iii) evenly to obtain a composite high-expansion gel material.
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