At present, there is shortage of migrant workers in many cities of our country, and the labor cost of construction is getting higher and higher. Only by promoting mechanized construction can we improve construction efficiency and reduce labor cost. Therefore, the mechanization of mortar construction, is the inevitable trend of China's future development.
Comprehensive performance of machine sprayed mortar:
Compared with the traditional mortar mixed on the site, the biggest difference of machine shotcrete mortar lies in the introduction of a series of admixtures that can optimize the performance of mortar, so that the new mixed mortar has good workability, high water retention rate, and still has good working performance after long distance and large height pumping. Its biggest advantage lies in the construction efficiency is high, the quality of the formed mortar is good, because the mortar has a larger initial speed when spraying, so it can have a strong adhesion with the matrix, can effectively reduce the occurrence of empty drum cracking.
Common problems of machine sprayed mortar:
Mortar in the process of conveying, mechanical spraying, due to various reasons may appear some problems, such as: power supply problems, pipe plugging problems, construction safety problems, and so on, for the solution of the problem.
Questions about electricity:
Machine spray equipment belongs to the high-power electrical equipment, in the power connection, the first need to check whether there are defects leakage cable phenomenon, then need to pay attention to whether the ground wire is reasonable, whether the positive and negative rotation of the motor is normal, and finally should pay attention to the connection is firm, to avoid the lack of phase. If there is any abnormality, the power should be cut off in time for rectification and repair.
Questions about clogged pipes:
1) the sand and other aggregates are not screened according to the requirements of the equipment, and there are large particles in the mortar. The mortar is stuck at the nozzle of the screw pump or spray gun, so that the pipe is blocked;
2) there is no pre-lubricating pipe before starting up and using, so during the pumping process of mortar, the mortar consistency value becomes smaller and smaller due to the suction of part of the water from the inner wall of the pipe, resulting in the formation of blocked pipe;
3) the consistency value of mortar is too small, and the overload operation of rotor of screw pump causes the stator to get hot in dry grinding, which causes the mortar board to block the pipe;
4) I am not proficient in operation. For example, in the process of spraying, only the pumping valve is opened, but the air pressure valve is not opened, which leads to tube blockage.
5) the equipment was not cleaned thoroughly after the previous use, and residual mortar remained in the pipeline. In the operation, must strictly follow the rules of operation, each time after the use of timely cleaning equipment. In case of pipe blockage, it is necessary to dredge the pipe in time. It is strictly prohibited to use the mortar for a long time to set in the pipe.
Construction safety issues:
The responsibility for safety is greater than mount tai. Jet equipment belongs to small and medium-sized mechanical equipment, but because the pumping process needs a certain pressure, still has a certain risk. Especially in high-rise construction, special attention should be paid to the safety of construction personnel. Therefore, in the construction of the need to put the spraying equipment in a reasonable position, the operators to cooperate with the tacit understanding, strictly prohibited to use the airbrush at anyone, to prevent human factors caused by the physical injury or property loss.
The mechanical construction of mortar mortar industry development trend. But at present, the domestic people's degree of understanding of mechanized construction is not enough, most of the mortar plant on the performance and technical characteristics of mortar spraying machine is not very clear, and the market can be skilled operators spray equipment technical workers are not many. Therefore, the comprehensive promotion of mechanized construction also needs the strong support of the government and the joint efforts of the industry!
