Construction of concrete cutting machine

Concrete can be said to be one of the most commonly used materials in construction. In order to make the ground smoother and more beautiful, many people also use a trowel, so you must understand some skills and matters before using it. The editor below will introduce to you the tips for using a concrete trowel. What are the tips for using concrete trowel The troweling machine can only be started by holding it steady by hand. In order to balance the machine body, adjust the screw. When starting work, be sure to hold it steady. If you are operating on the floor, adjust the direction to prevent the machine from losing control. Remember to first Grind coarsely, then finely grind later. When selecting, you must choose a suitable blade material based on the construction conditions. If it is too soft, it will deform during use, which may cause unevenness. You must choose a blade with high rigidity and strength. What are the precautions for operating the trowel machine? 1. Before use, you need to check the switch of the motor, check whether the cables and wiring are normal and comply with regulations, and check whether a leakage protector is installed. 2. Before use, you need to check whether there are any debris on the wiper plate to prevent the whole machine from jumping during use. 3. Start the trial operation after the power is turned on. The blades are generally in a clockwise direction and must not be reversed. 4. Operators must remember to wear insulating shoes and gloves. Assistant personnel must also wear these things to avoid damage to the insulation layer and electric shock accidents. 5. When a fault occurs, the power must be cut off before maintenance can be carried out. 6. The trowel should be placed in a dry place, free of corrosive gases and dirt, and its handle should also be placed in the specified position. When moving it, no rough handling can be carried out. Summary: This is the introduction to the tips for using concrete trowels. When choosing, you must first look at the material of the blade. If it is too soft, it will deform during use, which may cause unevenness. phenomenon, it is appropriate to choose a material with high rigidity and strength. If you want to know more related knowledge, you can follow us for consultation.

  The construction process of concrete pavement with double-layer steel mesh differs from that of single-layer steel mesh in the following aspects: – Single-layer steel mesh: – Steel bar processing mainly involves straightening, cutting, bending, etc. according to design requirements. After the processed steel bars are transported to the construction site, they are laid directly on the base. – Usually, the steel mesh is placed in the designated position by manual or small machinery, and fixed with iron wire or steel bar horse stool to ensure that there is a certain protective layer thickness between the steel mesh and the base, generally 3-5cm. – Double-layer steel mesh: – In addition to basic steel bar processing, for double-layer steel mesh, supporting steel bars or horse stool bars need to be set between the upper and lower steel meshes to ensure that the spacing between the two layers of steel mesh meets the design requirements, generally about 15-30cm. – First lay the lower steel mesh, and then install the upper steel mesh after fixing it. During the process, the position and spacing of the two layers of steel mesh must be strictly controlled to ensure that they do not shift during the concrete pouring process. – Single-layer steel mesh: – The installation of the formwork is mainly to ensure that its position is accurate and firm, and it can withstand the lateral pressure during concrete pouring. The height of the formwork is generally consistent with the design thickness of the concrete pavement. – Double-layer steel mesh: – Due to the existence of double-layer steel mesh, the installation of the formwork requires higher precision. When installing the formwork, it is necessary to consider the position of the steel mesh and the thickness of the protective layer to ensure that the spacing between the formwork and the steel mesh is uniform, and to prevent the formwork from squeezing the steel mesh and causing its position deviation. – Single-layer steel mesh: – When pouring concrete, the concrete can be directly poured into the formwork, and the inserted vibrator and the flat vibrator can be used to vibrate to make the concrete dense. During the vibration process, be careful to avoid the vibrator rod directly touching the steel mesh to avoid displacement of the steel mesh. – Double-layer steel mesh: – When pouring concrete, in order to avoid the upper steel mesh displacement caused by the impact of concrete falling, a more reasonable pouring method needs to be adopted, such as evenly spreading the concrete along one side of the formwork, allowing the concrete to slowly flow to the other side, or using a layered pouring method. – When vibrating, in addition to using an insert vibrator and a flat vibrator, for the concrete between the double-layer steel mesh, it may be necessary to use a small vibrating rod or vibrating sheet for auxiliary vibration to ensure that the concrete can be fully compacted between the two layers of steel mesh. At the same time, pay more attention to the operation of the vibrating rod to avoid touching the steel mesh and causing it to deform. – Single-layer steel mesh: – After the concrete is vibrated, use a scraper to flatten the surface, and then perform surface treatment procedures such as smoothing, and finally cover with a curing film or sprinkle water for maintenance to keep the concrete surface moist and prevent the surface from losing water and cracking. – Double-layer steel mesh: – During surface treatment, due to the restraining effect of the double-layer steel mesh on the concrete surface, more care should be taken during operations such as polishing to avoid uneven surfaces caused by the influence of the steel mesh. – During the curing process, it is necessary to ensure that the curing measures can fully cure both the interior and surface of the concrete, because the double-layer steel mesh will affect the migration and heat dissipation of the moisture inside the concrete to a certain extent, so the curing time may need to be appropriately extended, generally not less than 7 days.     CONCRETE LASER LEVELING MACHINE POWER TROWEL TRACKED MINI DUMPER AMOUR JOINT LIGHT TOWER STEEL FIBER  

  The construction plan of the laser leveling machine is as follows Requirements for the base surface: The base surface must be firm, compacted, without settlement, cracking, no oil stains, no plastic film, no other paint, latex paint, bubble gum and other residues on the ground, and the base surface must be flat without large ups and downs, no bumps, honeycombs, or cement lumps. 1. Rolling of the bare soil, requiring compaction and flatness error of 2~3cm∕2m. 2. Pad construction: Use C15 fine stone concrete to cast a 6 cm thick pad layer, vibrate with a vibration pump, and the surface does not need to be smoothed. The flatness is maintained at 2cm∕2m. (This item is optional) 1. Ground treatment After the general contractor and the relevant construction parties have cleared away the large building materials and garbage in the construction area where the 6 cm cushion layer has been laid and handed it over to us, we will first clean up the dust in this area. If there is paint or other foreign matter that is not easy to combine with concrete on the ground, we must do everything we can to remove it. Then rinse the ground with water, and there must be no floating dust. If the base layer is higher in special places, it should be chiseled off with an electric pick or air compressor. 2. Preliminary measurement of elevation According to the basic elevation points given by the general contractor or Party A, the elevation of representative locations in the entire area is initially measured with a level to see how much the thickness of the concrete differs from the thickness required by the owner. (This measurement should be as many points as possible, otherwise it is not representative). In most cases, since the flatness of the base layer is not well controlled, once the elevation is measured, it can be seen how thick and thin the thick and thin parts and the thickness of most concrete are. If the thickness of most concrete exceeds the contract thickness, or is much lower than the contract thickness, the situation should be reported to the superior truthfully and a solution should be requested before the next step of construction can be carried out. 3. Rebar binding For the thicker 20cm thick floor poured in this project, according to the design requirements, double-layer bidirectional reinforcement is generally required. The reinforcement arrangement requires Φ12@150*150, and the upper and lower layers are connected by horse stools. The distance between horse stools is 1 meter. The surface layer reinforcement is 3~4 cm away from the floor elevation. In order to prevent the floor from settling, it is recommended to set up an integral continuous steel mesh. Or pour in separate compartments, but use force transfer rods to connect the plates. The force transfer rods can be Φ20@1000 round steel bars, with a spacing of 400. 4. Formwork 1.) According to the elevation confirmed by Party A, the template position is determined according to the floor drain position and water collection well position listed in the drawings and the slope requirements. This project is in an underground garage, and there may be a slope requirement, so the template can use angle irons of different specifications from Ф6.5*6.5*5 to Ф3*3*2 as the template. Use large specifications for thick concrete and small specifications for thin concrete. According to the designed slope, the compartment casting method is adopted. 2.) The leveling of this project needs to be leveled by a laser leveler. The uniform high-frequency vibration of the laser leveler makes the concrete floor dense and avoids the stress concentration caused by deformation and cracking of the floor. When using a laser leveler for leveling, you only need to make the frame template of each piece. When supporting the formwork, first use an ink fountain to pop up the template control line on the base ground. The line is appropriately wider than the edge of the future compartment seam by 1~2 cm, so that after the formwork is removed, the side seam is not straight due to local damage, and it can also be trimmed. If it can be guaranteed that the side seam after each demolding is a straight line, the template can also be directly supported on the natural seam of the future axis. 3.) On the control line, drill holes on the ground with an electric hammer every one meter or so. Generally, a 12×200 drill bit is used, and the penetration depth is about 14 cm. 4.) Nail the steel bars with a diameter of 12 mm cut into 14 cm each section into the drilled holes. It is required to be firmly driven until it can hardly be driven down. 5.) Place the angle iron near the firmly driven steel bars along the line direction. First, use wood or bricks to pad the two ends of the angle iron. The approximate height is about the same as the elevation. Then one person looks at the level, one person holds the tower ruler, and another person uses a wooden wedge to fine-tune the height of the angle iron at any time according to the elevation. After reaching the same elevation, the electric welder spot welds the angle iron to the top of the steel bar. Then weld the other end of the angle iron in the same way. After both ends are welded, weld the middle part of the angle iron. After welding, check the elevation of one side again. 6) Brush the template oil (waste engine oil) on the supported template to facilitate demoulding. 7) After the compartment formwork is supported, the angle irons are welded around the water collection well. The upper end of the angle iron should be consistent with the floor slope of the compartment, and ensure that water is concentrated to the water collection well from multiple directions. 8) The construction method of the angle irons at the edge of the water collection well for the first floor with only floor drains but no water collection well and car ramp is the same as in Article 7.