Practicality issues. Asphalt roads are not suitable for large household machinery commonly used in rural areas. Especially those cultivators, harvesters, etc., some are similar to chains walking on the ground, and some are directly on iron wheels walking on the ground. If the road surface is built into asphalt pavement, it is obvious that the asphalt pavement is prone to potholes under the pressure of this machine and household machinery, and when the rain is soaked for a long time and the collision and squeeze of the car passing by, the small pit is easy to become a large pit, and the road is scrapped in less than two years.
First intuitively speaking, once it rains, you will find that the cement road is all a watery pool, and the asphalt road has no water, it is flowing away, relatively flat, and then from the feeling of driving past, driving a car is better, since my family bought an electric tricycle, I am deeply affected by it, walking on the cement road is always bumpy, the electric three-wheel shock absorption is not good, directly spread to people, drive faster, not evil are about to jump up, and the asphalt road will not appear in this situation, the cement road can not be used to level the road roller after repairing, The asphalt road can be, and the cost of the cement road is lower than the cost of the asphalt road, and the cement road can only be better than the previous dirt road after the cement road is repaired
In fact, this is mainly due to cost, many roads in rural areas are built by villagers themselves, so the road construction is also carried out in accordance with the simplest and most provincial measures.
The cement road is that after the subgrade is sorted out, the corresponding thickness of concrete is directly marked in accordance with the design requirements, and it can be opened to traffic after complete solidification, and the construction is simple and convenient. The asphalt road is one more process, that is, the first step is to straighten the roadbed, the second step is to pour concrete to harden the road surface, and the third step is to lay asphalt.
Let's start with the highway. So far, the total length of China's highways has exceeded 140,000 kilometers, ranking first in the world. So how many of these long highways are cemented? When China first started to build expressways, many sections of the road were cement paved, such as the "Hanyi Expressway" from Wuhan to Yichang, the "North-South Expressway" from Nanning to Beihai, the "Boundary Expressway" from Hefei to Jieshi, and so on.
The main reason for the construction of cement roads in the countryside is that the maintenance cost is relatively low, to know that before June 18, the rural roads are jointly funded by the state and farmers, usually the state subsidies are 70%, and the farmers raise 30%, so that the cost raised by a family is about 500 yuan, and there are more roads in the village, if all are repaired, it will require farmers to contribute thousands of yuan.
Therefore, in the countryside, the money for road construction is not too much, only the choice of cement roads, if you choose the asphalt road, then the farmers can raise more funds, it is not realistic at all.
When asphalt paving, it is generally necessary for the transport truck and paver and roller to work together. The paving temperature is between 130-140 degrees, and the boundary place needs to be manually processed in time to avoid waste. For places where the road width is less than the width of the paver, manual paving is required. However, in the rural village streets and laneways, most of the road width is narrower, and there are more turns, large machinery is difficult to enter, if all manual paving, it is also time-consuming and laborious, and the asphalt oil paving has certain requirements for temperature, once it is too late to pave, the temperature of asphalt oil is lower than the specified temperature, it will condense into a block, and it will all be wasted. In general, the width of the road surface is less than 2 meters, and it is more convenient and practical to do cement pavement.
Asphalt roadbed requirements are stricter, rural repair asphalt paving asphalt road there are roads when the road is wide and narrow roadbed is soft and other unfavorable factors, the tonnage of the road roller is rare to be compacted, just imagine, rolled to the edge of the road, the roadbed on the side of the roadbed collapsed by heavy pressure Soil and rock fell into the drainage ditch creek on the side of the road Is not blocked inconvenient crop irrigation will also make the pastoral scenery inferior a lot. The construction of cement roads can be narrow and narrow, which is also convenient for farmers to dry grain and reduce the cost of road construction.