Performance characteristics of foam ceramic insulation board
Due to the formation of mullite phase structure in the aluminum residue extracted from fly ash in the raw materials at high temperatures, foamed ceramic insulation boards have high tensile strength. The high porosity of the material gives it lightweight characteristics, while also having a low thermal conductivity and good insulation performance. Its performance indicators usually include: dry density ≤ 280 kg/m ³, water absorption rate ≤ 8%, and combustion performance of Class A (non combustible). Foam ceramic insulation board has a long service life, can have the same service life as the main building, and is not easily aged or deformed, with strong weather resistance. In addition, products such as glazed foam ceramic insulation boards also have characteristics such as waterproof and fireproof, thermal insulation, acid and alkali resistance, sound insulation and noise reduction, moisture and pollution resistance.
Glazed foam ceramic insulation decorative panel is a material used for building exterior walls. This material is made from raw materials such as perlite and bentonite, using a production process that combines functional and decorative layers, and is sintered at high temperatures. Its product features include waterproofing, fireproofing, thermal insulation, acid and alkali resistance, etc.
The construction process of foam ceramic insulation board is basically the same as that of XPS insulation board, but full area bonding (full bonding method) must be carried out during bonding, and no cavities are allowed. Its advantages include A-level fire resistance, which can play a role in fire isolation in a fire; Long lifespan and resistance to aging and deformation, can have the same lifespan as the main building structure; And it has the characteristics of lightweight, high strength, and thermal insulation. Its disadvantage is that as a new product, the cost is higher than that of XPS insulation board, and the full adhesive construction method also increases the construction cost. This material has been applied in practical engineering, such as being used as an internal insulation measure for residential buildings in Zhenjiang Keyuan Huating Real Estate.
construction technology
1. Construction of adhesive insulation system
(1) Before construction, the surface of the base wall should be thoroughly cleaned of floating dust, oil stains, release agents, hollows, and weathered materials; The day before construction, the base wall should be thoroughly moistened with water; Confirm that there is no liquid water on the body before sticking; Remove floating dust, loose sand particles, etc. from the surface of the insulation board.
(2) Hang vertical reference control lines and horizontal control baselines at external door and window openings, expansion joints, decorative lines, external wall corners, etc., to control the verticality and flatness of the adhesive and ensure that the adhesive insulation board is horizontal and vertical.
(3) When installing a bracket, chemical anchor bolts or other installation steel brackets can be used to ensure that the bracket is level.
(4) During construction, priority should be given to using main specification insulation boards (usually 600mm * 600mm in size), and auxiliary specifications or irregular patterns should be cut on site.
(5) Prepare adhesive mortar according to the prescribed mix ratio, mix as needed, and pay attention to sun protection and shelter. The mortar should be stored for more than 2 hours.
(6) The bonding should be fully adhered. The compacted thickness of the bonding mortar is about 8mm, and the mortar on all four sides should be absolutely full. The side should not be coated with adhesive mortar.
(7) The pasting should be divided into sections and laid horizontally from top to bottom. Each layout should be staggered (vertical seam) by 1/2 of the board length, and the minimum local staggered seam should not be less than 100. Adjacent boards should be close to each other, aligned, with a board seam distance of ≤ 2mm; interlocking should be staggered at the corners of the wall.
(8) When pasting, the insulation board should be firmly compacted and gently tapped and rubbed with a rubber hammer to ensure that the cement slurry and interface agent are in full contact with the surface of the insulation board. Rub and adjust the height, flatness, and position of the board surface simultaneously. When sticking the second layer, cement mortar should be used to fill the first layer bonding joint, and the extruded mortar should be immediately scraped off.
(9) Non main specification boards can be cut to the required size using a handheld electric cutting machine, with a permissible deviation of ± 2mm. The cut insulation board should be dust-proof and stain resistant.
(10) During construction, timely construction and necessary shading protection should be carried out within 7 days to prevent rainwater erosion and direct sunlight exposure; Winter construction should adopt anti freezing measures according to relevant standards; Construction shall not be carried out when the outdoor ambient temperature is above 37 ℃ or below 0 ℃. The bonded insulation board should be temporarily supported or fixed, and can only be removed after 12 hours. After pasting, water and maintain regularly.
(1) Design a system with fixed components, using anchors and specialized pressure plates for fixation. The distance between the fixing point and the plate angle should be within the range of 120-150mm. The installation of fasteners should be carried out 7 days after the insulation board is glued, with impact drilling and anchoring to the base layer at a depth of not less than 70mm and drilling depth of not less than 80mm. After laying the steel wire mesh, the fasteners should be installed.
2. Foam ceramic insulation board system plastering
(1) The surface of the foam ceramic insulation board for plastering needs to be cleaned.
(2) The plastering mortar must be compacted, with a thickness not exceeding 20mm, and a single layer thickness not exceeding 12mm, without hollowing.
