With the strict control of overloading in various places, some urban highway sand and stone transportation has changed from 4-axle dump truck to semi-trailer dump truck with more axles. The total weight of 49 tons of 6-axle truck is significantly improved than that of 31 tons of 4-axle truck, which can not only legally overload, but also ensure that the transportation volume is not reduced too much.
Similar to dump trucks, the overload control of urban mixer trucks also has the form of stricter development. According to the regulations, the maximum mixing capacity of 4-axis mixer truck can only be installed with mixing drum of 8 m3, which has a great impact on the current 4-axis mixer truck with 18 cubic meters.
Based on this background, some manufacturers have also launched concrete mixing semi-trailer, hoping to replace the traditional mixing truck with more axles.
However, the ideal is very beautiful, the reality is very skinny, most card friends do not seem to pay for this, and the questions raised are also very realistic.
Poor trafficability of semi-trailer
The concrete mixing semi-trailer is a combination of trailer and tractor. The length of the whole vehicle is much longer than that of the 4-axle mixer truck. In real life, not every construction site has a spacious construction space. The long body flexibility is poor, and it is very inconvenient to get in and out of the construction site.
In addition, the unloading of the mixer truck needs to be aligned with the tail of the pump truck. After the transport vehicle arrives at the construction site, it is difficult to operate the semi-trailer when turning around and reversing, which is not conducive to accurate adjustment of position, and the requirements for the driver are very high.
Due to the increase of the number of axles, the concrete mixing semi-trailer still adopts a 6x4 driven tractor with only four driving wheels, the same as the 4-axle mixer. The more the number of axles, the greater the power loss. If a 4-axle vehicle can walk over the same road surface, a 6-axle semi-trailer may get stuck.
In short, the actual environment of the construction site will give a vivid social practice lesson to the concrete semi-trailer.
Of course, it is not ruled out that some construction sites have good construction environment, complete pavement and enough space. There is absolutely no problem using concrete mixing semi-trailer in this construction environment.
A2 driver labor costs increase
Ordinary 4-axle mixer drivers only need to hold B2 driving license to work, and the salary is lower than A2, and the driver is easier to find.
The volume of concrete mixing semi-trailer is larger, why is it not sold well?
As a tractor, the concrete mixing semi-trailer must have an A2 driver's license. Not only is the salary higher than that of B2 driver, but also the driver with A2 certificate is more difficult to find. If the enterprise changes the ordinary mixer truck to the semi-trailer mixer, the shortage of drivers is big enough.
From the perspective of transportation cost, the carrying capacity of concrete mixing semi-trailer is larger, which can reach about 14m? Which is much more than that of 8m? 4-axle mixer. After the increase of benefits, the extra money can make up for the wage cost of B2 and A2 drivers, but it still can not solve the problem of lack of A2 drivers.
Concrete mixer tells you the characteristics of the volume of concrete mixing semi-trailer, you must consider according to your own needs in the process of purchasing!