The catch before dawn was more abundant, and at first there were still people counting how many crosses, and after waiting for a hundred, no one bothered about it, and there were always a few boats full. Pen, fun, pavilion www. biquge。 info

Back at the barracks, Sun Yi immediately arranged for people to scrape the scales and disembowel the fish, and quickly distributed them to the teams. The weather is too hot, and the fish is forked out of the wound, and if it is not eaten in time, it will rot quickly.

Yang Ritian hit his horse and galloped directly into the barracks, and when he got off the horse, he scolded his sergeants. He took over Yang Liulang on duty downstream last night, and received a report from the radio early in the morning that Lord Lidel and Yilong actually visited the thieves' den at night, and he was scared into a cold sweat.

Yang Ritian raised his horsewhip and pointed at the sergeant, "If there is a good one, which of you can bear it?" ”

Sun Yi stepped forward and persuaded, "Don't blame them. I, Lidel, agreed at the beginning, I can manage it if I want, and I can leave if I want to. ”

A dragon added fuel to the fire, "The sun is falling, with the means of the master, you soldiers will not be aware of it at all." ”

Yang Ritian was on fire, "A dragon!" You have taken your master to commit danger several times without permission, is there any military law in your eyes? ”

Yilong pouted, "Master is the leading uncle of our Wolf Mountain Hall, Master has spoken, and military law has to stand aside!" ”

"You ......", Yang Ritian was speechless for a while, although a dragon hung a deputy commander-in-chief, Wolf Mountain Hall was not under the control of the army.

Sun Yi hurriedly played a round, "Brother Pao is also helping, now that the raft is ready, it will be time for the army to take over." ”

Yang Ritian ignored Yilong at that time, "Master, you mean you can fight?" ”

Sun nodded, "If you don't fight these bandits, you should run away, you have to make a good total, how to dig up the bandits' lair after taking this stronghold." ”

Yang Ritian replied without thinking about it, "Catch a few live torturers!" ”

"It's a good idea, but it's better to have a backup plan." Sun Yiyi, "Let's go, I'll show you something good." ”

Sun Yi arrived at the site to clean up the catch and threw a few pieces of fish entrails to the big king in the corner. This Wang Ba has autism, and he doesn't eat or drink when he shrinks his head and legs.

Yang Ritian couldn't help but take a breath, "It's so big!" That's a lot of age! ”

Sun Yi disagreed, "No matter how old you are, you're still a king, and it's not this guy who is a good thing for you to see." ”

Sun Yi lifted the fish basket full of fish scales, took Yang Ritian and a dragon out of the camp gate, turned into the people's village, and entered a courtyard.

There were several cauldrons in the courtyard, and in the center of the courtyard was a grass-tied dummy, wearing an iron helmet and a pair of cotton armor. Several craftsmen were busy, Wang Erniu was pointing fingers, took Sun Yi's fish basket, glanced at it and hurriedly handed it to a craftsman.

Yang Ritian glanced at a dragon, "How many secrets are hidden in your Wolf Mountain Hall?" ”

A dragon spread his hands, "You blame me for this!" This is also my first time here! ”

Sun Yi said to Wang Erniu, "Erniu, you introduce to the two general soldiers, I'll go to see the craftsmen boiling glue." ”

Wang Erniu hesitated, "Master, to what extent?" ”

Sun said as he walked, "Just explain the reason clearly, and the specific recipe still needs to be kept secret." ”

Wang Erniu stretched out his hand to Yang Ritian and Yilong, "Two, please come here!" ”

When the three of them came to the middle of the courtyard, the cotton armor on the dummy was already full of holes, and Er Niu said: "This is the current helmet and armor of the border army." According to the experiments of the craftsmen, the cotton armor has a good effect on fireproof guns fifty steps away, and the cotton in the cotton armor can entangle the lead and form a ball, so the lead is stopped. The effect of cotton armor against bows and arrows is worse, and the arrows and arrow peaks of the bow and arrows can cut through the cotton wadding, but they can go deeper than lead. If it is a knife cut, the blade can easily cut through the cotton, and the cotton armor basically has no protective effect. ”

Yang Ritian nodded, cotton armor is indeed like this. The officers and soldiers of Yansui Town are equipped with a large number of cotton armor, which is cheap.

Wang Erniu picked up a square bird's nest-like thing and said, "Actually, the protection of the cotton armor against the fire gun is the same as this thing. ”

Yang Ritian took it, it felt very light, it looked like a mess of intertwined hemp, but it was hard to the touch.

Erniu explained: "This is made by mixing reed fiber, gypsum and glue. ”

A dragon frowned, "Reed fibers? ”

Wang Erniu said: "It is to find a way to make filaments from reed leaves and reeds." ”

A dragon suddenly realized that when he first entered the yard, a craftsman was brushing reed leaves with an iron brush, which turned out to be making "fibers".

Erniu picked up a small pebble and threw it at the "bird's nest", and the pebble was bounced back. Erniu said: "This is like the lead of a firebolt, which is stopped by tangled fibers. ”

Erniu picked up an iron skewer again, pierced it, and with a pop, the "bird's nest" was pierced, "This is like a bow and arrow."

Erniu picked up a kitchen knife and chopped it, and the "bird's nest" was chopped in half at once, "This is the effect of the knife." ”

Erniu took out another square piece of material, which looked smooth on one side and lay on a small piece of reed foil on the other. Er Niu said: "This thin stone surface, the protective effect is just the opposite, the lead of the fire gun will be shattered with a single blow, but the bow and arrow thirty steps away will not be able to shoot through, and the knife will only be cut but the blade will inevitably be rolled." What do you guess this stone face is made of? ”

A dragon took the "slate", rubbed it for a long time, and shook his head.

Erniu said a little sarcastically: "It's still plaster!"

Erniu said, "We all know that raw gypsum can fry mature gypsum, and cooked gypsum hardens with water and turns back into raw gypsum." The heat of the fried gypsum was too great, so the gypsum was burned to death, and it didn't stick when added with water. ”

The two nodded.

Erniu lowered his voice, "Master will burn the burned plaster again until the plaster is red, smells pungent, mix it with water and wipe it evenly, and when it dries, it will be this stone surface!" The master said that the plaster that came back from the dead is hard and wear-resistant, and they use it to make flooring, which is called floor plaster. ”

A dragon lowered its head and slashed at the "stone face" with its fingernails. Ordinary plaster will definitely leave scratches, but this stone surface has no traces at all.

Erniu smiled when he saw it, "This thin stone also adds lime powder, talcum powder and other condiments, which is harder than floor plaster." The craftsmen call this recipe the stone powder formula, and I don't even know it. ”

"But the stone made of stone powder is hard and hard, but it is a little crispy." , Erniu lifted the "stone slab" and smashed it on the ground, and the "stone slab" cracked into several pieces.

"So when I make stones, I add glue and a lot of fiber. Two people inside please! ”

The three of them turned into a large enclosure made of reeds. Inside, the craftsmen were bustling, Lidel Ye was squatting by a pot and watching the craftsmen stir, and more craftsmen were fiddling with piles of mud.

Wang Erniu pointed to a craftsman and said, "This is making a fibrous stone surface." ”

But the craftsman struggled to stir up a pile of white clay, which was mixed with a large amount of "hemp" as thin as a hair, just like a normal mason, using a brick trowel to paste "mud" on a wooden board.

Erniu introduced, "It turned out that this stone powder was mixed with cowhide gelatin, and later some craftsmen suggested that the best gelatin was fish gelatin, and the result was greatly improved." Now you know what the scales are for. ”

"Fish gelatin?" Yang Ritian asked.

Erniu nodded.

Wang Erniu pointed to the second craftsman, who was holding wisps of fiber, dipping them in powder and pasting them on the "velope stone surface". Erniu said: "This second layer is to overcome rigidity with softness like cotton armor." ”

The three of them walked slowly past the craftsman, and Er Niu continued, "This is the third layer, the fourth layer, and the fifth layer, and the recipe of each layer is different. In general, it is necessary to separate the soft and hard, and the yin and yang help each other. As a result of the experiment, a composite nail like a mille-feuille cake is much better than a mono-material one. ”

In the end, Wang Erniu lifted a half-human-high "mille-feuille cake" and handed it to Yang Ritian, "The biggest benefit of this composite fiber armor is that it is light!" ”

Yang Ritian took it and found that two cowhide handles stretched out directly from the inside behind the first card. Yang Ritian put it into his arm, grabbed a piece of cowhide, and waved it left and right a few times. Sure enough, it is light and flexible, not at all like a heavy iron shield, and it will have to be replaced after a long time.

Erniu said: "The current A card can be 30 steps away from the arrow, 40 steps away from the gun." As for melee, it's better to throw it away, it's cheap anyway, come back and get a new one. ”

Yang Ritian tried to control not to laugh, "Enough!" Enough! Even the iron armor in melee combat can't withstand the three-eyed round smash twice! How much can this deck produce in a day? ”

Erniu sighed slightly, "Gypsum Ha Lao has a lot of fortune, there are in the limestone river beach, and there are even more reeds than they can be used up." Now the efficiency of grinding lime into powder is too low, and only ten catties a day are beaten with stone grinders, and the outermost layer can only be made thin. How much you can produce in a day is the highest secret, although I know, it is better for you to ask the master directly. Two, come this way. ”

Yang Ritian didn't expect that there was still something to visit, but he was reluctant to put down the first card in his hand anymore, so he simply sandwiched it under his armpit.

The three of them stepped into another enclosure. This girth is slightly smaller. Several craftsmen appear to be pasting the lanterns with mud.

Erniu explained: "This is making composite fiber helmets. First weave a shelf with reeds, and then paste a few layers inside and outside, the reason is the same. The master said that after waiting for more wire, he would use the wire directly as a shelf. ”

Yang Ritian looked closely, it wasn't a helmet! It's just that it doesn't look like the spiky eight-petal of the border army, but it is round and bulging.

Yang Ritian didn't say a word, grabbed one and buckled it on his head, nothing else, just light! Be careful when turning your head with an iron helmet, this fiber helmet is like not wearing it. Two cowhide ropes were pulled down from the fiber helmet, and Yang Ritian skillfully tied them to his chin.

Erniu said: "The protection of this helmet is far worse than that of the iron helmet, and it has to be improved slowly." ”

Yang Ritian shook his head, "Yes is better than nothing!" A few strands of hay fell down the helmet.

Wang Erniu said embarrassedly: "According to the master's design, the innermost layer of this helmet is felt, but we don't have felt, so we have to replace it with hay, and the border army brothers will be wronged first." ”

……

In later generations, all glues were chemical glues. Therefore, Sun Yi has no knowledge of bio-glue, and is watching the craftsmen boil fish glue with great interest.

The craftsmen washed the scales four or five times, poured half of them into a pot and boiled them, and found a clean stone to dry the other half.

The craftsman said that you can put away the fish scales by drying them in the sun, and then boil them when you need to use them. Moreover, fish gelatin is the best gelatin, and sticky bamboo and wood furniture is much better than cowhide and horse skin.

Sun Yi remembered that Dong'e Ejiao is the glue boiled in donkey skin.

The water kept evaporating, and the liquid in the pot began to thicken, and the craftsman said that when it was thick to a certain extent, it was glue.

Sun Yi didn't expect it to be so simple, put some salt and sprinkle chopped green onions, isn't this just fish scale jelly!

In 2016, my mother often boiled fish scales jelly for Sun Yi, that is, fresh fish scales were boiled with water and seasonings to thicken, and then cooled to form a freeze. When eating, it can be served cold or made into soup.

Sun Yi doesn't like to eat, but his mother always insists, saying that fish scales contain egg scales, which can enhance memory and delay cell aging; Contains high collagen, can be used for beauty and calcium supplementation; Contains unsaturated fatty acids, can prevent high cholesterol, arteriosclerosis, high blood pressure and heart disease, etc., etc., you have to watch your son finish eating.

"Alas! I don't know when I'll see my mom again, what she's doing now. In the past, every time I was in the wild, my mother always told me to eat and sleep well, and it was a good idea to hygienic and not to catch a cold at night...... "Sun Yi's heart was sour.

"There's too much smoke here, I'll go out and breathe!" Sun Yi ran out under the pretext that tears had already fallen.

Just in time for Yilong and Yang Ritian to come out of the helmet workshop, Sun Yi hurriedly turned his back and picked up a few reed foil slabs used for experiments, "The communication soldiers can now send flags and read them, but they can't write. These scraps are taken back and used as whiteboard exercises. ”

A dragon hurriedly stepped forward, "Master, I'll take it for you." ”

Sun Yi secretly wiped his tears and pointed to the already tattered cotton armor, "And that, take it back and bounce the cotton again, and make me a bed quilt!" ”

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References (not related to the plot, skip for uninterested readers)

Types and uses of gypsum for construction

The most commonly used variety of gypsum in construction is architectural plaster, followed by model plaster, in addition, there are high-strength gypsum, anhydrous gypsum cement, and floor plaster.

The raw material for the production of gypsum is mainly natural gypsum dihydrate, also known as soft gypsum or raw gypsum, which is calcium sulfate containing two crystalline waters. Natural gypsum dihydrate can be used to make gypsum of various properties.

The main processes in the production of gypsum are heating and grinding. Due to the different heating temperatures and methods, gypsum with different properties can be produced.

(l) Construction plaster

Building gypsum is a white powder made by calcining natural gypsum dihydrate and other raw materials at a temperature of 107 °C ~ 170 °C, and then grinding it finely. Its main ingredient is type B hemihydrate gypsum.

After hardening, building gypsum has good thermal insulation and sound absorption performance and good fire resistance and moisture absorption performance; The color is white, which can be used for indoor stucco construction, especially suitable for making all kinds. White, smooth and delicate floral decoration, such as adding pigments can make the product have a variety of colors.

Building gypsum should not be used for outdoor projects and high-temperature projects above 65 °C.

(2) Model plaster

The cooked gypsum produced by calcining gypsum dihydrate, if the impurity content is small, the powder is finer, and it is called model gypsum. It sets faster than building gypsum and has high strength. It is mainly used to make models, sculptures, decorative floral decorations, etc.

(3) High-strength gypsum

The gypsum is placed in the pressure steamer and steamed at l.3 atmosphere (124 °C) to produce type A semi-aqueous gypsum, which is high-strength gypsum after grinding. This gypsum has high compactness and strength after hardening. High-strength gypsum is suitable for plastering works, decorative products and gypsum board with high strength requirements. When incorporated with a waterproofing agent, the product can be used in an environment with high humidity. It can also be added to organic solution to prepare binders.

(4) Anhydrous gypsum cement

When the natural gypsum dihydrate is heated to 400 °C ~ 750 °C, the gypsum will completely lose its moisture and become insoluble anhydrite, which is mixed with an appropriate amount of stimulant and ground to become anhydrous gypsum cement. Anhydrous gypsum cement is suitable for indoor use, mainly used to make gypsum board or other products, and can also be used as indoor plastering.

(5) Floor plaster

If the natural gypsum dihydrate is calcined above 800 °C, part of the calcium sulfate is decomposed into calcium oxide, and the finely ground product is called high-temperature calcined gypsum, also known as floor gypsum. After hardening, the floor gypsum has high strength and wear resistance, and the water resistance is also good, so it is mainly used as a gypsum floor for indoor floor decoration.