Regulator for improving workability of iron tailing sand concrete and preparation method of concrete

• Main Authors: DONG JIE, LV CHUANJUN, WANG ZHAOFENG, YANG PENGFEI, QU CHUANBO
• Format: Patent
• Language: Chinese; English
• Published: 07.04.2023
• 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 a modifier for improving workability of iron tailing sand concrete and a concrete preparation method, and belongs to the technical field of concrete.The modifier comprises, by mass, 60-80% of a sodium carboxymethyl cellulose aqueous solution, 10-20% of talcum powder, 3-8% of sodium polyacrylate, 3-8% of polyacrylamide and 0.5-4% of tapioca flour. The modifier is designed for adding a large amount of iron tailing sand, and in order to improve the workability of iron tailing sand concrete, the iron tailing sand can completely replace river sand fine aggregate and does not need to be blended with the river sand fine aggregate in proportion; the modified iron tailing mortar material effectively improves the uniformity and stability of a concrete structure, the compressive strength can reach 62 MPa or above, and good practicability is achieved. 一种改善铁尾矿砂混凝土和易性调节剂及混凝土制备方法，所属混凝土技术领域，调节剂组成质量百分比为：羧甲基纤维素钠水溶液60～80％、滑石粉10～20％、聚丙烯酸钠3～8％、聚丙烯酰胺3～8％和木薯粉0.5～4％。本发明调节剂是针对大量添加铁尾矿砂而设计的，为了改善铁尾矿砂混凝土和易性，使铁尾矿砂