What is Fabric formed concrete ?

Mold bags are a material widely used in engineering construction. The following is a detailed introduction to mold bags:

1. Definition and classification
Definition: Mold bags are flexible containers made of high-strength synthetic fiber materials, usually used for slope protection, bottom protection, bank slope protection, etc. in civil engineering. It has the characteristics of light weight, high strength, wear resistance, and anti-aging, and can effectively protect soil and rocks and prevent soil erosion.
Classification:
According to different materials: it can be divided into polypropylene (PP) mold bags, polyester (PET) mold bags, nylon (NY) mold bags and other types.
According to different processing techniques: it can be divided into two types: woven mold bags produced by factories and simple mold bags sewn by hand.
According to different filling materials: it can be divided into mortar type and concrete type.
According to the different slope protection functions and structures of mold bags: mortar type mold bags can be divided into anti-filtration drainage point type, non-anti-filtration drainage point type, hinge block type and frame type; concrete mold bags are usually non-drainage point type.
2. Common forms of mold bags
Rectangular mold bags: The fabric has no filtering points on the surface, and can be filled with concrete or mortar. After filling and forming, the shape is high and low, and the shape is beautiful. The filter-free mold bag is a four-layer double-layer fabric. The second and third layers in the middle of the fabric form climbing bars that cross up and down. The filling and forming is the designed thickness. It has the characteristics of high compressive strength of the hardened body and beautiful shape. This product is currently a widely used mold bag, generally suitable for revetment, slope protection, embankment, bottom protection and other projects such as reservoirs, water diversion channels, rivers, and reservoirs.
Ring mold bag: It is suitable for projects with a small thickness of concrete filling, such as slope protection and beach protection in inland waterways.
Hinged mold bag: The filling material in the bag is mainly mortar, and concrete can also be filled in an appropriate amount under special circumstances. Ropes of different strengths are used to penetrate the middle of the block in the vertical and horizontal directions. The blocks are fixed and pulled tightly to each other, which can not only drain water, but also freely sink or shift downward after washing or foundation sinking. This product is suitable for riverbeds, slope feet, and river bends for anti-scouring protection.
Grass-planting mold bags: The filling material in the bag is generally mortar. The product is woven into two types: Pin-shaped and non-pin-shaped. The former has a complex structure, and its frame size is generally between 22 and 30 cm. The thickness of the frame is less than 15 cm around the frame. The cross-section is an elliptical mortar hardened body. Trees, flowers, and grass can be planted in the frame. It is a novel material for beautifying hillsides and residential areas.
3. Function and application
Function:
Resist soil erosion: The bag-like structure of the mold bag can effectively stabilize the soil, prevent soil loss, and protect the landform environment.
Prevent soil landslides: The mold bag can increase the shear strength and friction coefficient of the soil, effectively prevent soil landslides or collapses, and improve engineering safety.
Improve soil environment: By filling the mold bag with materials such as stone segments and gravel, an artificial ecosystem can be formed to improve land utilization.
Strengthen wind resistance: In areas such as deserts or coastlines, by burying the mold bags underground, it is possible to effectively stabilize sand dunes, prevent desertification, and enhance the wind resistance of the land.
Application:
Road construction: mold bags can be used for slope protection, embankment protection, sidewalk reinforcement, etc., to improve the stability and safety of roads.
Environmental governance: mold bags can be used for flood control embankment reinforcement, soil and water conservation, river channel burial stone reinforcement, etc., to improve environmental governance effects and ecological benefits.
Water conservancy projects: mold bags can be used for reservoir dam stability, river regulation, coastal embankment reinforcement, spillway slope protection, etc., to improve the safety and benefits of water conservancy projects.
Mining projects: mold bags can be used for coal mine goaf sealing and mine environmental governance, to improve the safety and environmental benefits of mine production.
4. Construction characteristics
Mold bag construction usually adopts one-time spraying molding, which is simple and fast.
Mold bags can adapt to various complex terrains, especially in deep water revetment and bottom protection, which do not require cofferdams, can be directly constructed underwater, and have a high degree of mechanization. The slope protection surface is large, the integrity is strong, the stability is good, and the service life is long.
The mold bag has a certain water permeability. After the concrete or cement mortar is poured, the excess water seeps out through the gaps in the fabric, which can quickly reduce the water-cement ratio, accelerate the solidification speed of the concrete, and increase the compressive strength of the concrete.
In summary, as a new type of building material and engineering protection material, the mold bag plays an important role in many fields. With the continuous advancement of technology and the continuous expansion of applications, the future development prospects of the mold bag will be broader.

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