Composite high-performance polycarboxylic acid water reducing agent and preparation method and application thereof
A technology of water reducing agent and polycarboxylic acid, applied in the field of concrete, can solve the problems of large hydration heat release, large fluidity loss, poor pumpability, etc., to alleviate the hydration concentration, reduce the peak heat release rate, improve The effect of pumping performance
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[0042] Example 1
[0043] A composite high-performance polycarboxylic acid water-reducing agent, which is prepared by including the following parts by weight of raw materials:
[0044]
[0045] Among them, the water-reducing polycarboxylic acid water-reducing agent mother liquor is prepared by the following method: 320 parts of methallyl polyoxyethylene ether are dissolved in water as substrate solution I; 40 parts of acrylic acid are dissolved in water to obtain a solution A; Dissolve 2.0 parts of mercaptopropionic acid and 0.8 parts of vitamin C in water to obtain solution B; add hydrogen peroxide to the substrate solution I at 25°C, stir for 10 minutes, and add solution A and solution B dropwise at the same time. The addition process lasts for 2h, after the dripping is completed, keep it for 1~2h, add alkali to adjust the pH to 6~7, it is obtained; the solid content of the mother liquor of the water-reducing polycarboxylic acid water-reducing agent is 37.5wt%, and the solid cont...
Example Embodiment
[0052] Example 2
[0053] A composite high-performance polycarboxylic acid water-reducing agent, which is prepared by including the following parts by weight of raw materials:
[0054]
[0055] Among them, the preparation methods of the mother liquor of the water-reducing polycarboxylic acid water-reducing agent, the viscosity-reducing polycarboxylic acid water-reducing agent mother liquor, the slow-release polycarboxylic acid water-reducing agent mother liquor, and the heat of hydration inhibitor are prepared in accordance with the corresponding raw materials in Example 1. The preparation method is the same.
[0056] The above-mentioned composite high-performance polycarboxylic acid water reducing agent for barite concrete is prepared by the following method:
[0057] Add the mother liquor of the water-reducing polycarboxylic acid water-reducing agent, the viscosity-reducing polycarboxylic acid water-reducing agent mother liquor and the slow-release polycarboxylic acid water-reducing...
Example Embodiment
[0059] Example 3
[0060] A composite high-performance polycarboxylic acid water-reducing agent, which is prepared by including the following parts by weight of raw materials:
[0061]
[0062] Among them, the preparation methods of the mother liquor of the water-reducing polycarboxylic acid water-reducing agent, the viscosity-reducing polycarboxylic acid water-reducing agent mother liquor, the slow-release polycarboxylic acid water-reducing agent mother liquor, and the heat of hydration inhibitor are prepared in accordance with the corresponding raw materials in Example 1. The preparation method is the same.
[0063] The above-mentioned composite high-performance polycarboxylic acid water reducing agent for barite concrete is prepared by the following method:
[0064] Add the mother liquor of the water-reducing polycarboxylic acid water-reducing agent, the viscosity-reducing polycarboxylic acid water-reducing agent mother liquor and the slow-release polycarboxylic acid water-reducing...
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