The Rise of the European Emperor

In fact, the so-called cement slab roads are also very popular in later generations, and many squares have also used this kind of road surface. Of course, that's the low-end square. For high-end squares, either use marble slabs to pave the ground. Or, use tile. Only those with a small investment budget will use cement boards to pave the road.

Because the strength of the cement board is not high, unless it is a reinforced concrete cement board. Ordinary cement slabs are not as strong as slate slabs. Moreover, the aesthetics are also poor. After all, everyone knows what cement looks like, it's gray and looks bad.

Therefore, many pedestrian street plazas directly lay tiles on the pavement, which looks very eye-catching. But to be honest, tiles are so thin and not as strong as cement boards. When encountering a heavy truck, it is definitely over. Only the pedestrian plaza will be paved with this stuff.

The appearance of cement board is much worse than that of ceramic tile. But practicality is stronger. At least, it's not a problem to bear the carriage or something, even if it is a loaded carriage.

In addition, the pavement paved with cement board is also convenient for maintenance and replacement. Which cement board is crushed, just pry it up and replace it with a new one...

Because it is so convenient to pave the road, Marin has now given up his original plan to promote cement roads, and instead promotes cement slab roads. Especially in the streets of the city, laying cement boards is quick and easy, and the effect is also very good. At least, it is no worse than the previous stone road and cobblestone road.

But the most important point is that Marin can sell cement boards to other countries!

Before, Marin had been reluctant to help other countries build cement roads. Because of the special properties of cement, when it is used and mixed, it will definitely arouse the strong interest of other countries, and it is easy to attract thieves.

But selling cement slabs is different. Ma Lin can falsely claim that the cement slabs are inferior slates. The price can be a little lower than the authentic slate, even half the price is very profitable.

That is to say, from now on, Beihai will have a new exportable commodity-pavement cement board!

This kind of square cement board, which is about as thick as a brick but with a side length of 24 cm, is very convenient for paving. As long as the roadbed is tamped and the road surface is leveled, it can be directly laid on the roadbed with moist clay (as an adhesive).

This is much easier than making cement roads. A construction worker can lay dozens of cement slabs in a short time, and a long road can be laid in one day. As long as the clay mud used as a binder dries, the pavement is ready to use.

As for the roadbed, the roadbed mixed with lime and sand, which was very popular in the European Roman Empire, was used. This kind of roadbed is not bad for water running, and both Eastern and Western civilizations like to use it.

Of course, the domestic cement slab roads in Beihai are definitely different from those abroad. The difference lies in the adhesive...

In general countries, clay mud must be used as the adhesive between cement slabs and bricks. Usually there is no problem, but if it is soaked in water during the rainy season, the mud will definitely soften, causing some looseness on the road surface. Over time, some problems will appear on the road surface and need to be repaired.

As for the cement slab roads paved in Beihai, cement is directly used as the adhesive. Cement and cement board bricks are the same substance, and they are not afraid of water after they are hardened. In this way, the quality of the local cement slab roads in Beihai, which uses cement as the adhesive for the gaps between cement slabs and bricks, is definitely better than that of foreign countries.

But then again, even if mud is used as a binder in foreign countries, the quality of the road surface must be much better than dirt roads and gravel roads. Therefore, cement tiles will certainly not worry about selling in the future.

But first, Marin must make a model so that everyone can see the benefits. In this way, customers will come to order cement tiles.

As a result, helping the cities and towns in the Netherlands that do not rely on the sea and rivers to lay cement slab roads has become a top priority.

It just so happens that the engineering troops formed by Marin are currently idle because there is no war. Therefore, Marin plans to send engineering troops to the Netherlands to help build cement slab roads, which will serve as a demonstration.

Of course, it is already the beginning of September, and the autumn harvest is about to begin. Marin plans to send engineering troops to the Netherlands to help lay cement slab roads after the autumn harvest.

At present, the total number of Beihai National Engineering Corps has reached a huge scale of 5,000 people. Their main task is to build bridges and build roads in order to clear the way for the army. Of course, there is also the important task of building a military fortress.

Each of them has basically received training in masonry skills, bridge erection skills, and knows how to build blockhouses. Laying cement slab roads is just a very low-end job for the engineers. It is very simple and will not cause any problems.

Moreover, in order to facilitate their work, Marin also helped them "design" (copy) labor protection gloves for work and iron helmets (there is no high-strength plastic). In addition, there is a tilting dump trolley for easy dumping for transporting bricks. This trolley with a tipping bucket that can dump lime and silt is of great help to engineering construction. Unlike ordinary cars (including wheelbarrows), it is inconvenient to dump and can only be unloaded manually, which is troublesome and laborious.

...

In addition to these common construction equipment in later generations, Marin also innovated in terms of roadbed compaction and rolling...

People in later generations know that when building roads, road rollers are needed to compact the base layer of the road. In order to achieve the purpose of compacting the road surface, the wheels of the road roller are often steel rollers weighing several tons or even more than ten tons.

However, in this era, it is difficult to manufacture such a heavy grinding wheel. It's not that it can't be made, but it's made and can't be pulled. After all, even the strongest Sharma can pull a maximum of five tons. Moreover, it is the result of the application of low-drag bearings.

If there is no such thing as ball bearings to reduce resistance, it is estimated that Sharma can pull two or three tons of cargo.

In the same way, it is difficult for ordinary animals to pull heavy rollers. In order to achieve this goal, Marin used the method of pulling several cows together.

But the biggest problem is not that the oxen and horses can pull multiple rollers, but the transportation of the heavy rollers!

If it is a stone roller weighing several hundred kilograms, the transportation is simple, just a few people can just lift it onto the carriage. The current artillery in Europe is like this. The three-pound gun weighs 300 catties, and it can be easily carried on a carriage and transported away, and can be used for long-distance marches.

However, the rollers used for road rolling must weigh at least two tons, or even several tons. Otherwise, the effect of tamping the roadbed will not be achieved.

But the problem is—a roller weighing several tons is actually easy to make, but it is difficult to transport it to the construction site...

If the construction area is close to the sea and the river, boats can also be used with moving pulleys and levers to transport several tons of rollers to the construction area. But if it is in the inland area... it will be difficult to transport it in, especially in the mountainous area, it is almost impossible to transport it...

These days, there is no heavy construction machinery, and trying to transport several tons of rollers to areas with inconvenient transportation can kill people. Therefore, even the largest caliber infantry artillery produced by the Beihai country generally weighs at most one or two tons. This is still on the premise that the Beihai country has cage-mounted ball bearings. If other countries, it is difficult to transport a one-ton infantry gun.

How to do it? No gravity of several tons can't meet the requirements of compacting the roadbed...

Finally, Marin found inspiration when he saw Robert, a brat, kicking a glass bottle half filled with water...

Yeah, the empty bottle is not heavy, but it gets a lot heavier when filled with water. What if a hollow steel drum is used...

Therefore, Marin designed a huge hollow steel drum. The steel drum itself is less than a ton, but when filled with water, the total weight reaches as much as 5 tons. It is definitely enough to press the road!

When transporting the roller, as long as the water is drained from this hollow steel drum, it becomes an empty drum weighing less than one ton. Coupled with the use of ball bearings with caged balls, it is very convenient to be pulled by horses. Or, it is very convenient to build a springboard slope to roll the hollow steel barrel onto the special wide-body carriage.

Then, the road construction industry in Beihai State developed greatly. With this kind of hollow steel drum roller, Beihai can conveniently transport this kind of roller to all parts of the country, arrive at the construction site conveniently and quickly, tamp the roadbed, and build a more durable road. It is even possible to build roads in mountainous areas. Anyway, as long as it doesn't contain water, although this kind of hollow steel drum is not light, it can still be loaded on a horse-drawn cart and transported into the mountains. After all, things with a total weight of no more than 1 ton are completely within the carrying range of the carriage. If it doesn't work, you can use two or three horses to pull the cart together, and you can always transport the roller to the construction area...

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