Environment-friendly early-strength alkali-free liquid accelerator, preparation method and sprayed concrete

• Main Authors: CHEN JINGJUN, WANG XINDONG, LI GUOLIANG, JIN BAOCHENG, DUO SHENGJUN, ZHANG JING, GUO LIMIN, CHEN SHAOHUA, CHEN HUASHUN, ZHANG PENG, XIANG LIANG, XU YU, ZHANG WEI, LIU LUTUO
• Format: Patent
• Language: Chinese; English
• Published: 03.06.2022
• 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 relates to an environment-friendly early-strength alkali-free liquid accelerator, a preparation method and sprayed concrete, the alkali-free liquid accelerator comprises aluminum sulfate, organic acid and organic amine, and the organic amine is selected from triisopropanolamine. According to the present invention, the organic acid and the organic amine are specifically selected to cooperate with the aluminum sulfate, such that the storage stability of the obtained accelerator is good, and the early strength and the later strength of the concrete can be improved by adding the accelerator provided by the present invention into the sprayed concrete. 本公开涉及一种环保早强型无碱液体速凝剂、制备方法和喷射混凝土，所述无碱液体速凝剂的组成成分包括硫酸铝、有机酸和有机胺，所述有机胺选自三异丙醇胺。在本公开中，通过特异性选择有机酸和有机胺与硫酸铝相互配合，能够使得得到的速凝剂的存储稳定性较好，同时在喷射混凝土中添加本公开提供的速凝剂，能够提高混凝土的早期强度同时增加后期强度。