China s concrete technology can be explosion proof

For explosion-proof concrete, of course, it can be used for roofing. However, due to its relatively high cost, it is generally not used in this way.

The material requirements are Q235B, and the process requirements are also very strict, and the wire drawing rod itself is used for concrete wall explosion-proof, so the product quality is very important, I hope to help you, thank you.

The wire drawing rod is the most commonly used building material in the construction site, and its function is to maintain the spacing and shape of the inner and outer formwork when the concrete wall formwork is supported, so as to prevent the mold from bursting.

1. The selection of the wire drawing rod should be clear and neat. In this way, the pulling force of the wire drawing rod can be strong, and the nut can be operated smoothly. Reduce material waste and shorten man-hours.

Installation of the wire drawing rod: the drawing rod adopts 14 steel bars and the inner and outer side of the wall template connection to ensure the cross-sectional size and support strength of the wall body, the wire drawing rod exceeds the inner and outer side of the wall body 5cm, fixed with bowl bolts, first manually according to the technical disclosure with a drilling rig on the template to drill a round hole with a hole diameter of 15mm in the installation of the wire drawing rod, the horizontal spacing of the screw rod is 500mm, the longitudinal spacing is 500mm, and the bottom is 300 mm from the ground.

1. Different uses. The inner partition wall aerated concrete block wall is mainly to improve the seismic resistance of the building; Explosion-proof wall concrete solid brick wall is used to protect existing structures, highway traffic management, flood control, river channels, emergency flood control deployment, erosion control, retaining walls.

2. The building materials are different. The aerated concrete block wall of the inner partition wall is a new type of building material that is lightweight and porous, thermal insulation, good fire performance, nailable, sawable, planable and has a certain seismic ability; Explosion-proof wall concrete solid brick wall can be filled with sand, cement, stone, earth.

3. The attributes are different. The aerated concrete block wall of the inner partition wall belongs to the lightweight block wall; Explosion-proof wall concrete solid brick wall is a reinforced brick wall, the wall thickness is usually 30-40cm; The depth of the thickened wall foundation buried in the ground should be greater than 1m. The blast-proof wall should be able to withstand an impact pressure of 3MPa.

4. The load-bearing is different. The inner partition wall aerated concrete block wall can be used as a load-bearing wall; Explosion-proof walls, concrete solid brick walls should not be used as load-bearing walls.

The interior wall is generally made of autoclaved aerated concrete blocks, which is a key material for the manufacture of aerated concrete. The aluminium powder incorporated into the slurry creates a chemical reaction under alkaline conditions: the aluminium powder is extremely fine, and the resulting hydrogen gas forms many small bubbles, which remain in the concrete that solidifies very quickly.

This type of block is mainly used for infill walls and not as load-bearing walls.

Concrete solid brick walls for explosion-proof walls are made of concrete pouring to form prefabricated bricks, which can be used for load-bearing walls and firewalls.

The building materials are different. The aerated concrete block wall of the inner partition wall is a new type of building material that is lightweight and porous, thermal insulation, good fire performance, nailable, sawable, planable and has a certain seismic ability; The thickness of the concrete solid brick wall reinforced brick wall of the explosion-proof wall should be determined by the structural calculation, but it should not be less than 240mm, the strength of the bricks should not be lower, and the strength of the mortar should not be less than m5. Structural reinforcement:

Along the height of the wall, every 500mm configuration of 3 6-10 length horizontal steel bars, its two ends should be with the reinforced concrete frame or row frame column to be buried reinforcement binding or welding. When the length and height of the brick wall are greater than 6m, reinforced concrete intermediate columns and beams should be set up, and reinforcement should be arranged according to the structure. The concrete strength grade should not be lower than C15, and its end should be connected with the roof beams and frames and row frame columns; The thickness of the reinforced concrete explosion-proof wall should not be less than 180mm, the concrete strength grade should not be less than C20, and the cross-sectional area of the reinforcement should be determined by the structural calculation; Holes should not be opened in the explosion-proof wall.

When the process pipeline, cable, etc. must be passed, the hole should not be larger than 200mm, the hole should be equipped with reinforcing steel bars, and the hole should be filled and sealed.

There is no specific specification for the tension screw of the concrete wall in the basement, and it is not required to add PVC casing. It is a construction measure, and if the tie rod needs to be reused, it is necessary to have a PVC casing; For the exterior wall of the civil air defense war time zone, the waterproof requirements are high, and the waterproof tension screw must be used, and the PVC casing cannot be added if it cannot be reused.

OK. However, after demoulding, the hole should be sealed with explosion-proof cement.

The tooth marks should be pitied, and the small buckle firewood will not be opened for a long time.

Reinforced concrete explosion-proof wall construction, concrete pouring height of 6 meters, can it be poured at one time?

As long as the strength of the concrete can meet the construction intermittent regulations, it is OK. However, it is necessary to prepare pouring string barrels to prevent the concrete from exceeding the direct drop height allowed by the specification, and to enable the formwork to withstand the lateral pressure of the concrete.

I did a project in Beijing that can be watered at a time when it is 9 meters high.

If you want to do concealed installation, you must do pre-embedding before pouring, and the threading pipe and wire box should be placed inside in advance.

If the concrete has been poured, it is best to do the surface installation, or the construction is difficult, and it is difficult to chisel out the position of the line pipe.

35 days for seismic structural measures for masonry structural columns; 30d is enough for the partition wall of the frame structure 1, steel bar binding specification: the lap degree of compression steel bar binding should be taken as multiple of the lap degree of tension steel bar binding and 200mm

2. The degree of reinforcement of lap concrete structural components is enough to meet the requirements of the two steel bars superimposed on each other, and the basic form of steel bar connection is: lashing, lap, welding, mechanical connection, and several types of overlapping materials of the same type are called lap steel plate lap and fixed with rivets or bolts; Plank laps are nailed with nails; The steel pipe lap is tightened with a buckle; The wooden pole lap is wound with iron wire, the stiffened steel bar lap is overlapped, and the fixed binding is carried out by the concrete gripping force, so that the two steel bars are stressed synchronously.

It doesn't feel like there's any point in asking such questions.

It is recommended that you check the information yourself.

The explosion-proof room should be equipped with an explosion-venting wall, and the concrete explosion-proof wall with a thickness of 200mm is far from enough.