To build a fortress, the necessary items are bricks and cement, reinforced concrete structures, these two are irreplaceable, as for the steel bar, in the smelting process without effective improvement of the premise, can be replaced by bamboo chips. Pen "Fun" Pavilion www.biquge.info

Speaking of bamboo instead of steel bar, many people will think of the tofu slag project, many projects exposed in later generations, found bamboo chips, everyone shouted and beaten, but in a special period, in China's fifties and sixties, when there was an extreme shortage of steel and many large-scale projects needed to be supported, the ordinary construction of the whole China was actually vigorously promoted.

The toughness, stress and many other conditions of bamboo chips, the application in reinforced concrete, is still quite good, at least, when it has just been built, the strength is there, but the durability is not strong.

In a closed vacuum environment, it is easy to say that once exposed, it is easy to weathered and decay, forming problems, which is one of its biggest weaknesses, but when it was first built, the level of all aspects was quite good, and even between 10 years, it was unlikely that too many problems would occur.

One of the roles of bamboo, of course, Zhao Xin wants not long-term stability, he just wants to solve the current problem, the price of steel has not decreased, with bamboo is the best choice, at most pay attention to a little when choosing, consider the overall result, in some places that are prone to water or moisture, you can not use bamboo, you need to use steel instead.

The only weakness of the bamboo piece is the water, as long as the bamboo piece is concrete, damp or after the water, the bamboo piece will quickly decay, lose the ability to support the overall structure, which is also the key to the tofu slag project, in the fifties and sixties, China built a large number of bamboo buildings, as long as the span is not more than 3 meters, not too wet place, no water on it.

In the fifties and sixties to build these bamboo buildings, the design life is about 30 years, most of them in the early eighties of the city construction, was demolished and rebuilt, but a small number of overdue service, and finally reached 55 years, not nothing, but in the next 20 years, the potential safety hazards are gradually increasing.

It can be seen that bamboo tendons still have a certain role, at present, the entire Great Song Dynasty, hundreds of millions of people, the total amount of steel every year, that is, tens of thousands of tons, even if the Zhao credit card system is embodied, can not support the consumption of a large number of fortresses, bamboo is the best choice.

Bricks are the easiest, China has a history of burning bricks, Qin bricks and Han tiles, from the Qin Dynasty to use green bricks to build the Great Wall, to resist the invasion of nomads, not to mention the imprisoning effect of the Great Wall, purely defense, it is indeed an ancient strategic line of defense, as long as it is not too bad for the dynasty, the nomadic soldiers, rarely break through the Great Wall.

The Song Dynasty even lost the sixteen states of Youyun, not to mention the Great Wall, which was the weakest place of the Song Dynasty, the millions of cavalry of the Liao State, the murderous cavalry of the Western Xia, could be attacked from high to low, in most cases, the Northern Song Dynasty needed one to two, there was no easy to defend and difficult to attack, only a large number of cities could be built, a series of city defenses.

The construction of the city costs a lot, which is also an important reason why the military expenditure in the northwest has risen year after year, especially under the premise that the Western Xia has won three wars, Longxi is mainly on the defensive, after the good water river, a series of important ministers in the northwest, are holding the city to resist, a series of military towns to build down, this cost is very amazing, at the peak, the annual expenditure of 30 million guan.

Compared with red bricks, the manufacturing process is higher, the price is more expensive, the green bricks are strong and durable, in more than 100 years, or even longer, the green bricks are far stronger than the red bricks.

Zhao Xin didn't even choose the steel bar, directly chose the bamboo piece, the purpose is very simple, there is no need to build a hundred-year, or even a thousand-year project, what he asked for is fast, let alone 30 years, even if it is 3 years to be able to use normally.

The traverser plus the card system can't establish an advantage in three years, so it's not just a matter of finding a piece of tofu to kill you.

The advantages of red bricks over green bricks are revealed, and he almost inevitably chooses red bricks, which have simple functions, save a lot of processes of green bricks, and air cooling is cooler than water, and the yield is also high, but the consumption of heat is reduced.

Bricks are easy to solve, as for cement, more confident, the original cement, but is made of volcanic ash and limestone calcining, as early as the ancient Roman era, born in Europe, that is more than 2000 years from now.

The majestic Colosseum, as well as the majestic Greek palaces, these are completely different from ancient China, mainly brick and stone structures, not as beautiful as the large palaces in the Chinese feudal era, but sturdy and sturdy, and at the same time rarely affected by fire, the huge masonry structure, became a flame retardant of fire, not a wooden palace, once on fire, the majestic palace, will become a sea of fire.

China's large palace complex, where in the later generations, only retained a Forbidden City, the reason is that the wooden structure can not last, more than 500 years, has been considered terrible, in the feudal society, under the premise of a long time must be divided for a long time, often destroyed in the war, a fire, a huge cost, beautiful palace city, will disappear completely.

On the contrary, ancient Rome and ancient Greece, they used cement and masonry and other structures to build huge projects, in the long history of more than 3,000 years, has been preserved to the modern society, this is not a question of who is good and who is bad, these are two architectural concepts, and the difference in architectural style.

Zhao Xin needs several big workers, some of them are brick-burning masters, and the other part is pottery, the former, as long as the process of green bricks is changed from water-cooled to air-cooled, reducing the appearance of cyan iron and increasing the number of red iron, it can turn green bricks into red bricks, reduce difficulty, reduce steps, and reduce costs, which is the advantage of red bricks.

The latter is prepared for cement, the firing of ceramics requires a temperature of about 1100 degrees, and the low-grade cement is almost 900-1000 degrees, Zhao Xin is now impossible to make high-grade Portland cement, this thing is modern technology, he is very hard, and the strength is also very large, in the era when there is no artillery, or even large-scale siege engines, it is completely unnecessary to make so hard, so high-grade cement.

The standard is based on the times, in the low-grade era, more than 100 points, even if you are 1000 points, 10,000 points, it is overflowing, and the display is only 100 points, Zhao Xin does not have the luxury of making the most powerful in later generations, comparable to the high-grade of steel, high-bearing cement, he just needs to make ordinary low-grade cement.

In this way, as long as the cement reaches the temperature of the pottery, his raw materials are very simple, if there is volcanic ash, it is the best, it doesn't matter if there is not, a part of the clay and quicklime is fine, just adjust the formula, which is also the basis of Zhao Xin's confidence.

Among the first batch of materials purchased by Wang Song, there is some limestone, this limestone is used as a raw material, not to burn cement, these are more professional things, Zhao Xin does not know a lot about them, only wait until the master comes to the door.

Baozhou seems to have a place to burn bricks, in fact, all the border military states, there are a large number of brick-making mines, because the border military state, is the largest customer of bricks, from the middle of the high salary to hire a few brick-burning masters, there should not be too many problems, however, the pottery is less.

Firing pottery, the furthest can be traced back to the primitive society more than 10,000 years ago, however, with the rise of porcelain, there are many other firing processes, the north is gradually replaced by the south, many are in the south, Baozhou is not nearby, to go farther, even if it is the fastest, it takes 10 days.

At this point, Zhao Xin specifically asked Miao Yuan, he is a very confident person, this is also a matter of no way, professional things are left to professional people to do, otherwise, it will not be a time saver, but a waste of time.

Time is extremely important to Zhao Xin, even if the Baozhou Mutiny still appears according to history, it will be 6 months at most, and no time can be wasted.

Zhao Xin knows very well that he is a historian, maybe he knows a little bit about all things, but he is not professional, especially in these fields, he personally went out, maybe for a period of time, he can also figure out the process, but it takes longer, or do some simple things.