Fiber cement board with high fixed carbon content and preparation method thereof

• Main Authors: XIE DAMING, HU SHUGUANG, LIU ZHICHAO, WANG FAZHOU
• Format: Patent
• Language: Chinese; English
• Published: 05.03.2024
• 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 discloses a fiber cement board with high fixed carbon content and a preparation method thereof. The preparation method comprises the following steps: mixing fibers, a gelling component, a filler and water to obtain slurry; the slurry is subjected to vacuum dehydration forming, and a plate blank is obtained; pre-curing the plate blank under the condition that the CO2 concentration is 20-30% VOL, and then carrying out carbonization curing under the condition that the CO2 concentration is 60-80% VOL, so as to obtain the fiber cement plate with high fixed carbon content. According to the method, low-concentration CO2 is adopted for pre-curing, a drying box is not used for drying treatment or static curing, the low-concentration CO2 can enable the fiber cement board to be subjected to a preliminary carbonization reaction, heat release is generated, a small amount of water is removed, and the fiber cement board can open a carbonization channel easily. And then high-concentration CO2 carbonization main