Zhao Xin has never been in contact with industry, whether it is study, or later social contact, it is close to history and liberal arts, I have always heard that industry, what standards, what system, feel that it is all routines, and even the workers of these factories themselves think that this is formalism.

To make such a set of hardness standards is also to test the hardness of some cement, but after it was really made, Zhao Xin understood that first-class enterprises play standards, not to make money, but to formulate a unified standard for the industry.

With this system, with this hardness index, you can use a very simple method to distinguish the difference between the same things, which is very important for an industrial system.

It seems that there are many things that he doesn't understand, so he must be humble and silently improve in actual production.

Fortunately, it's not too late now, everything is still just getting on the system.

This abbreviated, very simple standard in later generations, for this era, is a breakthrough, a magic weapon, how can it be considered good? It's the same with cement, it's hard to say that fifteen stones must be better than 10 stones, not necessarily.

Under this data system, at the very beginning, the reinforced concrete structure that has just been made, his hardness is about 4.5, don't underestimate this, the kind of blue brick city wall of the Northern Song Dynasty before, its hardness is not even 3, as for the previous earthen wall, it may only be 2, it is the huge city wall, so that they have a strong protective force, but the surface hardness is a hard injury, in principle, with a small knife with greater hardness, you can slowly dig him up.

The strength of the city wall, in addition to the hardness and pressure resistance, this, there is no data system, there is no way to test, but the greater hardness, on behalf of the greater strength, the volume of the city wall itself, this protection will be greatly expanded, which is also the source of the terrible fortress.

The cement itself is made according to certain specifications, and the surface hardness is large, even if the internal pressure resistance is similar, or the same, its overall performance is much higher.

Before the advent of weapons such as artillery, it was almost impossible for the fortress to be directly attacked by a single weapon, and even catapults and ballistae were difficult to make traces on them.

On the contrary, the ordinary earthen wall and the blue brick wall, the former, ordinary arrows, can penetrate deep into the city wall, and after a thousand holes, it will be breached, while the blue brick wall is slightly better, but the stronger crossbow arrows and catapults can also damage him.

The reinforced concrete structure, as in the demonstration, the standard of 4.5, represents the broken pebbles, even if it is the weaker of the stones, but it is also a hard stone.

The hardness of 4.5 has made cement have a strong root, this new material, on the basis of 4.5, has been upgraded to a grade, reaching 5.5, do not underestimate this promotion, in the hardness index, this is the hardness of glass, it looks inconspicuous, and the glass is also fragile, which is determined by the characteristics of the glass itself, not that the hardness is not high.

In nature, the vast majority of stones can not be painted glass, which is also an important method to identify general gemstones, that is, take this gem to depict on the glass, there are scratches, indicating that the hardness is higher than the glass, it must be a gemstone, if even the glass can not be scratched, but they are painted, except for a very small number of kinds, Tian Huangshi and the like, which are not known for their hardness, then it must be fake.

The appearance of a cement gave the Northern Song Dynasty such a terrible weapon as a fortress, Sun Ji and Xue Yu also experienced it personally, and they even used their actual combat experience to realize that such a thing as a fortress cannot be conquered by manpower, and at a certain time, I am afraid that it can only be used to besiege such a method.

No matter how cold-blooded a general is, it is impossible to endlessly expel soldiers to attack the city, or this kind of castle that is almost impossible to conquer with manpower.

Now, on this basis, a new kind of cement was born, how not to surprise them, they can be regarded as a long insight, the previous hardness, has been terrible to surprise them, and now on this basis, it has increased by 20%, so that the degree of cement in the rock is one step closer.

You must know that the superhard steel used to make saw blades and drill bits in later generations is only between 5.8 and 6.2, and only some powder-smelted high-speed steels can achieve a hardness of 7 or even 8.

This point, only Zhao Xin knows, and when he says it, he doesn't scare Sun Ji and others to death, they more or less, think that this is useless, isn't it a waste?

It's already very hard, why should it be hard, but Zhao Xin knows that the reinforced concrete with 4.5 hardness is nothing, and the later generations with the number 6.2 have come out, that is, the overall hardness is equivalent to the level of 6.2, which is not much different from the demonstration.

The reason for this is that artillery will appear quickly, his crossing, his accession, and the future of China, in terms of the application of thermal weapons, will exceed most of the period in history, and it is possible to surpass the Ming Dynasty.

As for the Qing Dynasty after that, even the flintlock pistols and even the flintlock pistols of the Ming Dynasty were not inherited, and the strong bows and crossbows were turned into pieces of paper, which were pressed and beaten by Britain thousands of miles away.

Even if the soldiers of the Northern Song Dynasty in this era faced Britain at that time, they might not be able to hold the harbor, because the British in 1840 could be said to be very terrible on the battleships, and it was far from being able to confront the Great Song army in this era.

But on land, it's different, although they also have artillery and guns, but their range does not exceed 150 meters, or the era of platoon guns, compared with the popular crossbows of the Great Song Dynasty, it is also different, and it is impossible to appear in the Opium War during the wave.

Enter the inland, immediately make them look good, even some slave countries in Africa, semi-feudal countries can fight the colonial army, the Qing Dynasty is really rotten to the bone.

Even if it is a primary artillery, a shell propelled by chemical energy such as gunpowder is already quite powerful, and the 4.5 hardness cannot stop even a primary artillery, and there may not be a cannon that will be blown down, but after a long time, the collapse is certain.

The research on cement is still going on, and Zhao Xin also knows that it is unlikely to make a breakthrough in this area, in fact, the cement of this formula is already very lucky, similar to this basic type of research, there is a breakthrough is already worth celebrating, how long has it been.

In addition, in addition to this cement, steamed buns do not need to continue, the use of soda ash is already the biggest breakthrough, write down the taste problem, is a matter of benevolence and wisdom, soap, before the research of spices has not made a breakthrough, it is not suitable for large-scale new products.

Because he has not yet waited for the news, thinking about it, at the speed of the feudal era, it may take a few months, Zhao Xin could not waste time, in the case of cement, a basic project in a short time, it is unlikely that there will be more breakthroughs, he naturally turned to steel.

As I said before, the situation in Miaojiazhuang is not suitable for large-scale iron smelting, and even Zhao Xin can't change this.

Any large-scale ironmaking requires a large amount of equipment, and after these equipment are fixed here, it is difficult to move, in this case, Zhao Xin is ready to leave Miaojiazhuang, and it is impossible to put the equipment here, so what Zhao Xin took was a small-scale experiment.

The territory of Miaojiazhuang is too small, and there is no large-scale iron ore around, but Hebei itself is a place to produce iron, as well as coal, with some blacksmiths, small-scale production can also be, mainly for high-end demand, the level of magic weapons.

Zhao Xin did not adopt the form of a boiler, which is equivalent to a step to the sky, he knows some steps of earth-based steelmaking, but the demand is too high, not suitable for the time being, fortunately, his hobbies are very wide, in addition to bows and crossbows, he also knows cold weapons and cold weapons.

The cold weapons of later generations, in this era, are basically the level of divine weapons, the sharpness of weapons, is not the only measure of weapons, sharpness is not sharp, as long as it is ground well, even if it is an ordinary material, for those with lower hardness than him, you can also blow hair and break hair, cut iron like mud, but if you want to use it for a long time, and become a real magic weapon, hardness is a must.

Zhao Xin's identity as a doctor of Peking University and a historian allowed him to enter some ethnic minority areas that still maintained the habit of cold weapons, and his identity also made it impossible for him to peep into the other party's secrets, but he saw a lot of the production process of cold weapons throughout the whole process.

The quenching of the last step, many nationalities have retained, this is also the most secret place of cold weapons, the creation is the same, with a certain proportion of wrought iron with pig iron, fold strike, under the hammering, let the wrought iron and pig iron mix with each other, under the temperature and pressure, gradually form an alloy body, so that the performance has a huge improvement.

However, the stress generated under temperature and pressure is the fundamental constraint of the weapon, and the final quenching process is quite critical.

How developed modern science and technology is, the key is the previous steps, quenching according to the different quality of steel, there are a lot of possibilities on the Internet, these, Zhao Xin is no problem.

Before, Zhao Xin really didn't think about getting this, this is just a hobby, after all, even if the efficiency is a little higher than before, the performance will be a little better, but the efficiency is low.

In the 21st century, handicraft is always synonymous with high prices, but in terms of quality and quality, it may not be comparable to industrial production, which is only to meet the individuality, and there are some unique historical backgrounds, it will develop.

However, Sun Ji mentioned that Zhao Xin promised the ultimate product of the Falling Moon Bow, when it will be done, let his eyes shine, in this era, the magic weapon is very expensive, and when it comes to large-scale combat, one or two magic weapons can't change the overall situation at all, and it is also a business to make some appropriately.