High-performance concrete composite admixture and preparation method thereof
A high-performance concrete and composite admixture technology, which is applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the problems of increasing the cost pressure of concrete mixing plants and the high cost of admixture raw materials, and achieve space The effect of low moisture demand, wide range of sources, and improved strength performance
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Embodiment 1
[0020] Example 1 Activator
[0021] The activator used in the present invention, its preparation method comprises the following steps:
[0022] In the first step, add 5kg of amide mixture, 2kg of cellulose ether, 7kg of acrylic acid, 10kg of cyclic hydrocarbon mixture and 4kg of polymer dispersant into the reactor respectively, set the pressure at 4MPa, and the temperature at 50°C for the reaction, and simultaneously open A stirring device was used to stir for 2 hours to obtain a mixture;
[0023] In the second step, add 50kg of sodium hydroxide, 70kg of sodium metasilicate and 200kg of calcium sulfate into 200kg of water, and add the mixture obtained in the first step, mix and stir for 30 minutes, and then proceed at a temperature of 400°C Heating for 30 minutes, then cooling for 2 hours, the activator of powder particles is obtained.
[0024] Among them, the amide mixture consists of 1.875kg N-ethylacetamide, 0.625kg formamide and 2.5kg 2,4-dihydroxybenzamide.
[0025] Am...
Embodiment 2
[0028] Embodiment 2 composite admixture 1
[0029] The invention provides a high-performance composite concrete admixture, which is prepared from the following raw materials: 30kg of waste residue, 10kg of tailings, 1kg of desulfurized gypsum, 5kg of powder and 1kg of activator.
[0030] Among them, the waste residue is composed of 20kg fly ash and 10kg metallurgical waste residue, and the tailings are a mixture of 4kg high-alumina silicate tailings, 4kg magnesium-iron silicate tailings and 2kg alkaline silicate tailings.
[0031] Among them, the main components of the powder are 1kg crushed stone, 2kg muck and 2kg broken bricks.
[0032] Wherein, the activator used is the activator obtained in Example 1.
[0033] The preparation process is:
[0034] The first step is to feed the raw materials other than the activator into the ultra-fine vertical mill for grinding through the rotary feeder with frequency conversion, so that the particle size of each raw material can reach 8u...
Embodiment 3
[0036] Embodiment 3 composite admixture II
[0037] The invention provides a high-performance composite concrete admixture, which is prepared from the following raw materials: 60 kg of waste residue, 16 kg of tailings, 2 kg of desulfurized gypsum, 12 kg of powder and 5 kg of activator.
[0038] Among them, the waste residue is composed of 40kg fly ash and 20kg metallurgical waste residue; the tailings are 6.4kg high alumina silicate tailings, 6.4kg magnesium iron silicate tailings and 3.2kg alkaline silicate tailings mixture.
[0039] Among them, the main components of the powder are 2.67kg of gravel, 5.33kg of muck and 4kg of broken bricks.
[0040] Wherein, the activator used is the activator obtained in Example 1.
[0041] The preparation process is:
[0042] The first step is to feed the raw materials other than the activator into the ultra-fine vertical mill through the rotary feeder with frequency conversion, so that the particle size of each raw material can reach 12...
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