What are the wearing parts of concrete power trowel?

  Appropriately increase the number of trowel passes of the trowel machine, so that the blade squeezes and presses the concrete surface multiple times, which helps to further squeeze out the bubbles inside the concrete and make the concrete surface more compact and smooth. However, attention should be paid to the time interval between each trowel. It is not advisable to perform the next trowel before the concrete reaches a certain strength, so as not to damage the concrete structure. Generally speaking, it is more appropriate to perform 2-3 trowels after the initial setting of the concrete and before the final setting.   The pressure of the trowel machine on the concrete surface can be appropriately reduced. If the pressure of the trowel machine is too high, a harder "shell" will form on the concrete surface, which is not conducive to the discharge of bubbles, but may seal the bubbles inside the concrete. By adjusting the counterweight or hydraulic system of the trowel machine, the trowel machine can apply a more appropriate pressure to the concrete surface during operation, so that bubbles can escape the surface more easily. The specific pressure adjustment value needs to be tested and explored according to the state of the concrete and the situation of bubbles.   In the process of adjusting the operating parameters of the trowel machine, it is necessary to closely observe the changes on the concrete surface and make fine adjustments to the parameters in time according to the actual effect to achieve the best trowel effect and eliminate bubbles on the concrete surface. At the same time, it is also possible to combine measures such as optimizing the concrete mix ratio and improving the pouring process to fundamentally reduce the generation of bubbles on the concrete surface.  

Concrete pressure strength detection method 1. Rebounder or Schmitt Hammer (ASTM C805) Method: The hammer is activated by a spring release mechanism, which presses the plunger and presses it into the concrete surface. The rebound distance from the hammer to the concrete surface is in the range of 10 to 100. The measurement results are then associated with the strength of the concrete. Pros: Relatively easy to use and can be done directly in the field. Cons: To ensure accurate measurementresults, pre-calibrated concrete samples are required. Different states of the surface and the presence of rebar under large aggregates or test sites can affect the test results. 2. Penetration test (ASTM C803) Methods: When carrying out a penetration test, a pin or probe is drilled into the concrete surface with a special device. The strength and depth of drilling required to drill into a concrete surface are related to the strength of the poured concrete. Pros: Relatively easy to use and can be done directly in the field. Cons : The data are greatly influenced by conditions such as surface state, template type, and aggregate used. Accurate strength measurements require multiple sampling of concrete samples for early calibration. 3. Ultrasonic pulsation detection (ASTM C597) Method: This method is used to judge the velocity of the vibration energy pulsation in the ground floor. The ease with which this energy penetrates the floor plate reflects the results of the concrete's ability to elastic, resist deformation or stress, and density. The data is then associated with the strength of the concrete slab. Pros: This is a non-destructive testing method and can also be used to detect defects such as cracking or honeycomb holes inside concrete. Cons: The method is seriously affected by the enhancement method, the moisture in the aggregate and the concrete material. Multiple samples and calibrations are also required to obtain accurate test results. 4. Pull-up test (ASTM C900) Method: The main principle of this method is to pull the metal rod, which is poured inside or installed afterwards, out of the concrete. The cone after pulling out and the amount of force required to pull out from the concrete are related to the strength of the pressure. Pros: Easy to use, can be done in both old and new building structures. Cons: This detection can cause the concrete to break or damage. To obtain accurate test results, a large number of test samples need to be selected at different locations on the floor plate. 5. Drill core method (ASTM C42) Method: The drill core method is used to extract solidified concrete sample blocks from the floor plate. These samples are then compressed in the machine to monitor the strength of their concrete. Pros: These samples are more accurate than field solidification samples because the concrete of strength is tested by actual heat and solidified on site. Cons: This is a destructive detection method that requires the destruction of the structural integrity of the concrete slab. The position of the core needs to be patched after the fact. The strength data must be obtained by the lab. 6. Poured concrete cylinder detection method (ASTM C873) Method: The cylindrical mold is placed in the position of the pouring area. Fresh concrete is discharged directly into these molds, which are retained in the floor board. After the floor plate solidifies, remove the specimens and pressurize them to detect their strength. Pros: This method is considered to be more accurate than on-site cured specimens because the concrete undergoes the same solidification process and conditions as the site floor plate; Cons: This is a destructive detection method that requires the destruction of the structural integrity of the concrete slab. The hole position left after the specimen is removed needs to be repaired afterwards. The strength data must be obtained by the lab. 7. Wireless Maturity Sensor (ASTM C1074) Methods: The principle of this method is based on the direct relation of concrete strength and its hydration temperature history. Before starting pouring, the wireless sensor is placed in a concrete template and secured on the rebar. The sensor receives temperature data and uploads it to any smart device APP with a wireless connection. According to the maturity calculation formula of the setting number in the APP, the collected information is used to calculate the pressure strength of the concrete element at the current position. Pros: Anti-pressure strength data is fed back in real time and updated every 15 minutes. At the same time, because the sensor is embedded inside the template, the data accuracy and reliability are also ideal, i.e. the curing data collected is consistent with the in situ concrete element. This also means that you don't have to spend time waiting for a third-party lab to provide the test results. Cons: Each batch of mating concrete needs to create a maturity curve using a test method of a collapse dwelling barrel and complete a one-time calibration.

1, rack The main role is to make horizontal cutting vehicles in the orbit for horizontal movement and cross-cutting mechanism in its orbit for vertical movements. 2, cross-cutting mechanism By the cross-frame, transmission and across the device, guide wheel, swing device, cutting wire and other components. The drive and the spanning device drive the cross section to cut the blanks vertically and cut the wires simultaneously for both directions. 3, the level of cutting cars By the frame, scraper device, trimming device, transmission device, hanging column, wheel group, Ping group and other components. Horizontal cutting car on both sides were equipped with two sets of sheaves and two sets of flat wheels, driven by the horizontal cutting machine in the spikes and flat track on the walk back and forth, to achieve horizontal cutting and "bread head" cutting. 4, flip table By the flip frame, carts, cars, flip the main cylinder and walking cylinder and other components, its role is to use the horizontal placed in the flip table on the body of the body turned 90 ° forward and moved to the cutting position, the horizontal, vertical cutting And six-sided cutting, complete cutting and then flip back to the starting position. 5, hydraulic system By the petrol station, motor, pump, all kinds of valves, pipe joints and other components. The main role is to flip the table smooth and accurate flip 90 °, cart, car synchronized to move to the appropriate location. [1] 6, electrical control system Follow the instructions to achieve manual and automatic control of all actions.