In the construction of concrete pump, the weight of friction between mechanical metal and concrete is closely related to the speed of pumping, concrete label, and some specific formulations of concrete. For example, concrete contains more aggregates, and the ratio of sand to cement is relatively high. If it is less, then the friction force of the concrete pump will increase....

Select according to the project volume and construction period requirements. When the amount of concrete construction is large and the construction period is long, medium or large fixed concrete mixers or mixing stations should be selected. If the amount of concrete work is small and the construction period is short, small and medium-sized mobile mixers should be used....

During the use of the road roller, the diesel engine of the road roller often stalls due to the lack of diesel in the fuel tank. After the diesel engine is turned off, although diesel is added to the fuel tank, air has entered the diesel pipeline at this time, and the fuel supply cannot be restored by using the hand pump. Only by removing the air in the diesel pipeline can the roller start smoothly. So we take the following method: first find a small basin and hold a certain amount of diesel oil, and place it at a position slightly higher than the diesel pump; then, remove the diesel pipe connecting the fuel tank to the hand pump, and put it into a small tank containing diesel. After that, pump the diesel oil with the hand oil pump to remove the air in the low-pressure oil circuit; reassemble the diesel pipe connecting the oil tank to the hand oil pump and try to start it, then the diesel engine of the road roller can be started normally....

1.Check whether the transmission clutch of the concrete pump is relatively sensitive，whether the wire rope is relatively intact, and whether the pulley is normal every day. A careful inspection can avoid the failure of the concrete pump during construction, and can also serve as maintenance parts. The effect of prolonging the service life of concrete pumps....

As a common machine for small and medium construction, small road roller is widely used in earthwork construction of roads, railways, buildings, ports, mines and other construction projects. The characteristic advantage of small road roller is that they are small. This small size not only reflects the volume and structure, but also in some small road projects, which can solve some difficult engineering problems. When the large machinery cannot be driven in to complete the work task, the small road roller can complete the construction well....

Before the road roller works, release the parking brake and put the gear lever in the middle position. Check the braking and steering functions of the road roller, which shall be sensitive and reliable. The mud scraper of the road roller shall be flat and excellent. Before starting, there should be no stagnant and irrelevant personnel around the road roller. When the road roller needs to change the front and rear driving direction, first turn off the vibration switch, and then carry out the direction conversion operation after the road roller stops. It is forbidden to use the reversing clutch for braking. In case of emergency, the rear wheel brake of the road roller can be used as the emergency brake. When the road roller rolls on the new road, it shall roll from the center to both sides. The rolling shall not be too close to the edge of the subgrade, and the distance from the edge of the subgrade shall not be less than 0.5m to prevent collapse....

Concrete pump is a special model that is used by many construction parties at present. In the south, it is mostly used for the construction of floors, and in the north, it is generally used for the construction of heating projects. To ensure the longevity of concrete pump,daily maintenance is very important....

The main advantage of mini excavator is their ease of transportation between construction sites. Mine excavator do not need large and medium-sized trucks or heavy trucks to carry out transportation, and small and medium-sized vehicles can transport them. In this way, the transportation is not only convenient, but also the transportation cost of the equipment can be greatly reduced, and the investment rate of return is high....

Road roller also need a suitable temperature environment when working. If the road roller is used in an environment exceeding the working temperature, it will bring great damage to the road roller itself....