Stone and concrete cover GFRC curtain wall panels in prefabricated buildings

The skills and product bottlenecks that are currently being challenged in domestic assembly-building (concrete and steel structures) are the stone or concrete coverings (ie, exterior wall panels) described in this article.

Assembling constructions (concrete and steel structures) that are being promoted in China

The exterior panels used today are nothing more than the following:

Concrete sandwich panels and concrete double skin panels. These two kinds of wallboards are only applicable to the so-called "same cast-in-place" "prefabricated construction", that is, the need to use a grouting sleeve at the construction site to fix concrete sandwich panels; or the need to put concrete sandwich panels at the construction site " After the reinforcing bar and the reinforcing bar on site are fixed together, the interior cavity of the concrete double skin wall plate is poured at the construction site.

Precast concrete curtain wall

Conceptually, the two types of pre-cast concrete plywood are the same for conventional reinforced concrete and prestressed concrete. However, the need to pay close attention to external decoration, mold planning, thermal insulation, fixed to the construction skeleton, and the construction of the skeleton must be satisfied The strength and rigidity are enough to support the work of the board.

Typical detail of a precast concrete curtain wall on a cast-in-place concrete skeleton. The board in this example is full height, each containing a fixed window. For the sake of clarity, the drawing of steel bars, contours of thermal insulation data, and interior decorations have been omitted from the board.

Made CorewallR cavity wall, specialized foam molding precast concrete sandwich panels. A ribbed roller is used to press out the outside of the panel, which involves inserting a layer of foam insulation between the concrete layers.

The concrete hanging board produced by the factory can use very high quality molds, as well as a variety of exterior decorations, from glass-like to rough surfaces, to expose aggregates. Terracotta, thin brick, or thin stone facings can be fixed to pre-cast concrete panels. Pre-cast concrete sandwich plates are sandwiched between the inner layers of the plates for thermal insulation. As a selection, the insulation data can be attached to the opposite side of the board, or non-structural walls can be built on site. It is necessary to plan general concrete or prestressed concrete slabs to resist the impact of wind, deadweight, and seismic forces, and to control the cracking of concrete. It is necessary for the attachment to transfer all these forces to the skeleton of the building and to allow for adjustment of the device and the relative displacement of the frame and the hanging plate.

Recent developments, such as carbon fiber reinforcement or ultra-high-performance concrete, promised to make boards thinner and lighter than those made with traditional materials.

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Glass fiber reinforced concrete curtain wall

Fiberglass-reinforced concrete (GFRC) is an appropriate novel hanging plate material, with several advantages over conventional pre-cast concrete slabs. It has been blended with short fiberglass, which provides a satisfying tensile strength without the need for rebar. The thickness and weight of the board is approximately 1/4 that of conventional pre-cast concrete panels, which saves shipping costs. The board is also simple to handle, and promises to use lighter device hardware. The light weight of the pegboard also allows the weight skeleton of the building to be lighter and cheaper. The ability to use three-dimensional molding of the mold, creating confusing details, and a wide range of color and texture of glass fiber reinforced concrete (GFRC).

Prefabricated fiberglass reinforced concrete GFRC curtain wall panels.

(a) Lay a layer of cement mortar with a special gun and use a 38mm long alkali-resistant glass fiber reinforcement. It is generally required to use three layers to form the full layer of the deck; each layer must be compacted with a small hand roller before laying the next layer. The total thickness is generally 13mm. (b) After the completion of the glass fiber reinforced concrete (GFRC) finish, the steel skeleton is placed on it, and the operator manually covers the wet glass fiber reinforced concrete (GFRC) mat to the anchor rod and the skeleton and glass Fiber-reinforced concrete (GFRC) surfaces are joined together.

It is necessary to use alkali-resistant glass to make fiberglass reinforced concrete (GFRC) fibers to prevent them from diffusing in concrete. GFRC ribs can be selected from stiffened plates, but the general habit is to add a welded frame made of a light standard steel column to the back of each fiberglass reinforced concrete (GFRC) face in the factory. Use a slightly tortuous method to fix, when the demand is slightly tortuous, promise a slight relative displacement between the surface layer and the skeleton. Figure 21 shows a typical method of fixing a metal frame reinforced concrete (GFRC) panel to a building. The margin of a fiberglass-reinforced concrete (GFRC) facing, as shown in Fig. 22, is generally only about 12.7 mm thick so that the foam strip and sealant can be inserted between the panels.