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The invention discloses a preparation method of a polyaluminum sulfate modified accelerator, which comprises the following steps: step 1, gradually and slowly adding an inorganic dispersant into water at room temperature, and uniformly mixing to obtain a milk white colloidal dispersion liquid; 2, sodium hydroxide is dissolved in water according to the proportion and heated to 95 DEG C, gibbsite powder is added for a reaction, a solution with the sodium aluminate concentration being 70% is prepared, after heating is stopped, cold water is added for cooling, the temperature is constant at 50 DEG C, tetraethoxysilane and ferrous sulfate are added under the condition of the stirring speed of 300 r/min, stirring continues to be conducted for 30 min, and a modified polysilicic acid solution is obtained; and 3, slowly adding the modified polysilicic acid solution into the milk white colloid dispersion liquid, adding sodium fluoride and an organic tackifier, uniformly mixing, heating to 75 DEG C, adding aluminum sulfate, uniformly stirring, and carrying out heat preservation reaction for 1.5-3.0 hours to obtain the polyaluminum sulfate modified accelerator, thereby effectively improving the cement adaptability and the concrete strength.
本发明公开了一种聚合硫酸铝改性速凝剂的制备方法，包括以下步骤:步骤一：在室温下向水中逐步缓慢加入无机分散剂，混匀，得到乳白色胶体分散液；步骤二：按配比将氢氧化钠溶解水中，加热至95℃，再加入三水铝石粉末反应，制备成铝酸钠浓度为70％的溶液，停止加热后加入冷水降温并恒定于50℃，在300r/min的搅拌速度条件下加入正硅酸乙酯、硫酸亚铁，继续搅拌30min,得到改性聚合硅酸溶液；步骤三：将改性聚合硅酸溶液缓慢加入乳白色胶体分散液中，并加入氟化钠和有机增粘剂，混匀，升温至75℃，再加入硫酸铝，搅拌均匀后，保温反应1.5‑3.0h后得到所述聚合硫酸铝改性速凝剂，效提高水泥适应性和提高混凝土强度。
The invention discloses a preparation method of a polyaluminum sulfate modified accelerator, which comprises the following steps: step 1, gradually and slowly adding an inorganic dispersant into water at room temperature, and uniformly mixing to obtain a milk white colloidal dispersion liquid; 2, sodium hydroxide is dissolved in water according to the proportion and heated to 95 DEG C, gibbsite powder is added for a reaction, a solution with the sodium aluminate concentration being 70% is prepared, after heating is stopped, cold water is added for cooling, the temperature is constant at 50 DEG C, tetraethoxysilane and ferrous sulfate are added under the condition of the stirring speed of 300 r/min, stirring continues to be conducted for 30 min, and a modified polysilicic acid solution is obtained; and 3, slowly adding the modified polysilicic acid solution into the milk white colloid dispersion liquid, adding sodium fluoride and an organic tackifier, uniformly mixing, heating to 75 DEG C, adding aluminum sulfate, uniformly stirring, and carrying out heat preservation reaction for 1.5-3.0 hours to obtain the polyaluminum sulfate modified accelerator, thereby effectively improving the cement adaptability and the concrete strength.
本发明公开了一种聚合硫酸铝改性速凝剂的制备方法，包括以下步骤:步骤一：在室温下向水中逐步缓慢加入无机分散剂，混匀，得到乳白色胶体分散液；步骤二：按配比将氢氧化钠溶解水中，加热至95℃，再加入三水铝石粉末反应，制备成铝酸钠浓度为70％的溶液，停止加热后加入冷水降温并恒定于50℃，在300r/min的搅拌速度条件下加入正硅酸乙酯、硫酸亚铁，继续搅拌30min,得到改性聚合硅酸溶液；步骤三：将改性聚合硅酸溶液缓慢加入乳白色胶体分散液中，并加入氟化钠和有机增粘剂，混匀，升温至75℃，再加入硫酸铝，搅拌均匀后，保温反应1.5‑3.0h后得到所述聚合硫酸铝改性速凝剂，效提高水泥适应性和提高混凝土强度。
Preparation method and application of polyaluminum sulfate modified accelerator
一种聚合硫酸铝改性速凝剂的制备方法及应用
HUANG HE (author)
2022-07-29
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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