How can iron oxide pigments be applied to cement building materials?

Nowadays, there are many colors appearing on the surfaces of indoor and outdoor buildings, beautifying people's visual lives. So what pigments are used in building materials and how are they applied?

Due to the beautiful and durable color tone of iron oxide pigment, its resistance to strong sunlight exposure and climate change, as well as its resistance to alkali and mortar, it has no harmful effect on the properties of cement. Strong coloring power, suitable particle size and structure, and good dispersibility. So it is suitable for coloring various building structures and cement components, as well as various indoor and outdoor colored concrete surfaces and building surfaces, such as walls, floors, floor tiles, roof tiles, panels, sinks, blocks, towers, colored mortar, colored tiles, and ridge tiles. Terrazzo and mosaic tiles are used to decorate indoor and outdoor walls, floors, stairs, porch, passages, etc. Artificial stones such as artificial marble, artificial gray granite, etc. Asbestos cement is used for decorating wall panels, floor stone covers, roof tiles, window sills, and stairs.

Usage: The amount of iron oxide pigment used in concrete products is limited to 1-10%. Exceeding the high limit will cause a decrease in the mechanical strength of the product, generally around 5-8%. At the same time, iron oxide pigments do not contain lead and zinc oxides, which can affect the setting time and strength. Concrete products sometimes require a temperature of 200. For black and brown iron oxides that can be converted to iron red at 180 ℃, they must first undergo thermal stability treatment as they are cured by hot pressing above C. If used on terrazzo, the bottom layer is 2-3 centimeters thick and the surface layer is 15 centimeters thick.

Due to the excellent weather resistance, alkali resistance, and light resistance of iron oxide pigments such as iron oxide red, which cannot be combined with other inorganic or organic pigments, iron oxide pigments are used as coatings and coloring materials. Such as wall decoration, artificial marble, ground grinding stone, and coloring of silicate products. On airplane runways with colored cement or concrete pavement, the exterior walls of temples are decorated with iron oxide yellow, and the protective walls around the imperial palace are decorated with iron oxide red for surface decoration.