Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Early-strength additive for concrete superfine powder admixture and preparation method of early-strength additive
The invention discloses an early-strength additive for a concrete superfine powder admixture and a preparation method of the early-strength additive. The preparation method comprises the following steps: preparing modified silicon dioxide filter-press sludge from silicon dioxide filter-press sludge, diluted hydrochloric acid and a nano alpha-Fe2O3 precursor, and then mixing the modified silicon dioxide filter-press sludge with triethanolamine, calcium nitrate, calcium hydroxide and a polycarboxylic acid high-performance water reducing agent to prepare the concrete admixture early-strength additive. After the nano alpha-Fe2O3 precursor is modified, the surface activity of silica compounds in the filter-pressed sludge is improved, the silica compounds are promoted to participate in cement hydration reaction, the early strength is improved, and further, the diversity of improvement of the early strength of the cement is increased through synthesis of early-strength calcium silicate; meanwhile, the early strength agent effect of sodium sulfate existing in the filter-press sludge is fully utilized, the three early strength effects are combined with one another, and the potential function that the filter-press sludge can generate the early strength effect is fully excavated.
本发明公开了一种混凝土超细粉掺合料早强型添加剂及其制备方法。本发明通过采用二氧化硅压滤淤泥、稀盐酸、纳米ɑ‑Fe2O3前驱体制备改性二氧化硅压滤淤泥，之后与三乙醇胺、硝酸钙、氢氧化钙及聚羧酸系高性能减水剂混合制备得到混凝土掺合料早强型添加剂。本发明通过纳米ɑ‑Fe2O3前驱体改性后，提高了压滤淤泥中硅氧化合物的表面活性，促进其能够参与水泥水化反应，提高早期强度，进一步通过早强型硅酸钙的合成，增加了水泥早期强度提升的多样性，同时充分利用了压滤淤泥本身存在的硫酸钠的早强剂作用，三种早强作用相互结合，充分挖掘了压滤淤泥能够产生早强作用的潜在功能性。
Early-strength additive for concrete superfine powder admixture and preparation method of early-strength additive
The invention discloses an early-strength additive for a concrete superfine powder admixture and a preparation method of the early-strength additive. The preparation method comprises the following steps: preparing modified silicon dioxide filter-press sludge from silicon dioxide filter-press sludge, diluted hydrochloric acid and a nano alpha-Fe2O3 precursor, and then mixing the modified silicon dioxide filter-press sludge with triethanolamine, calcium nitrate, calcium hydroxide and a polycarboxylic acid high-performance water reducing agent to prepare the concrete admixture early-strength additive. After the nano alpha-Fe2O3 precursor is modified, the surface activity of silica compounds in the filter-pressed sludge is improved, the silica compounds are promoted to participate in cement hydration reaction, the early strength is improved, and further, the diversity of improvement of the early strength of the cement is increased through synthesis of early-strength calcium silicate; meanwhile, the early strength agent effect of sodium sulfate existing in the filter-press sludge is fully utilized, the three early strength effects are combined with one another, and the potential function that the filter-press sludge can generate the early strength effect is fully excavated.
本发明公开了一种混凝土超细粉掺合料早强型添加剂及其制备方法。本发明通过采用二氧化硅压滤淤泥、稀盐酸、纳米ɑ‑Fe2O3前驱体制备改性二氧化硅压滤淤泥，之后与三乙醇胺、硝酸钙、氢氧化钙及聚羧酸系高性能减水剂混合制备得到混凝土掺合料早强型添加剂。本发明通过纳米ɑ‑Fe2O3前驱体改性后，提高了压滤淤泥中硅氧化合物的表面活性，促进其能够参与水泥水化反应，提高早期强度，进一步通过早强型硅酸钙的合成，增加了水泥早期强度提升的多样性，同时充分利用了压滤淤泥本身存在的硫酸钠的早强剂作用，三种早强作用相互结合，充分挖掘了压滤淤泥能够产生早强作用的潜在功能性。
Early-strength additive for concrete superfine powder admixture and preparation method of early-strength additive
一种混凝土超细粉掺合料早强型添加剂及其制备方法
SUN HAO (Autor:in) / LI LIANG (Autor:in) / YU LINYU (Autor:in) / LIU WANGANG (Autor:in) / WANG RENXIAO (Autor:in) / YAN JIAJIANG (Autor:in) / LU HAO (Autor:in)
22.09.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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