Early-strength environment-friendly alkali-free accelerator and preparation method thereof

• Main Authors: LI ZHIQING, YAO LONG, WEI XIAO, ZHAO FUWEI, FU QIAN, SUN JIANPENG, HU CHAOLONG, CHEN ZHIGANG, YANG DAFU, WEI RUI, LI BO, XU FENG
• Format: Patent
• Language: Chinese; English
• Published: 04.06.2024
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; LIME, MAGNESIA; METALLURGY; REFRACTORIES; SLAG; TREATMENT OF NATURAL STONE

The invention provides an early-strength environment-friendly alkali-free accelerator and a preparation method thereof. The method comprises the following steps: compounding aluminum sulfate, aluminum hydroxide and volcanic ash into a polymeric aluminide; and uniformly suspending the modified calcium silicate crystals in the polymeric aluminide to obtain the early-strength environment-friendly alkali-free accelerator. The volcanic ash comprises silicon dioxide and aluminum oxide; the modified calcium silicate crystal comprises the following raw materials: a surface modifier, glycerol, ethylene glycol, hydrated magnesium silicate, sodium silicate nonahydrate, sodium metaaluminate, calcium nitrate and water. According to the present invention, the problems of high viscosity and large mixing amount of the iron standard alkali-free accelerator at the present stage can be solved. 本发明提供了一种早强型环保无碱速凝剂及制备方法，其方法为采用硫酸铝、氢氧化铝和火山灰复合成聚合铝化物；将改性硅酸钙晶体均匀悬浮于聚合铝化物中，即得到早强型环保无碱速凝剂；所述火山灰包括二氧化硅和氧化铝；所述改性硅酸钙晶体的原料包括表面改性剂、甘油、乙二醇、水合硅酸镁、九水