After the prosperous Tang Dynasty

The so-called cement is actually an adhesive. From this definition, isinglass and glue are also included in the category of cement, but what Xiao Yansui wants to tinker with must be in the lives of future generations. The most commonly used portland cement.

Many building materials have their own advantages and disadvantages. As for cement, it can be said that it is the easiest to obtain in the Tang Dynasty without sufficient industrial foundation.

After arriving at the Xiao family's old house, Xiao Yansui separated from his grandfather Xiao Song, and went straight back to his own yard to change his clothes first, then looked at the sky, thinking that the fresh fish soup in the kitchen should be almost stewed, so he restrained himself He took out a pen and paper and began to sort out the simple method of making cement. After drying his hair, he went to have dinner with his grandfather.

When Xiao Yansui appeared, Xiao Song was sitting by the desk and looking at the fish soup on the table with great interest. Hearing the sound, he raised his head and greeted him with a smile: "Come on, Liu Niang, this fish is fresh. The soup tastes good too.”

"Well, I caught it for the first time!" Xiao Yansui was more or less excited. Although the fish itself is not rare, the fact that I caught it with my own hands gave it a different meaning. .

At the dinner table, even if there were only two grandparents and grandchildren, they chatted, but they were still enthusiastic.

After Xiao Song became an official, he no longer had to worry about the political affairs of the court and China every day. He seemed to be much more relaxed. In addition, he had returned to his hometown where he was born and raised, listening to the local accent he had been away for a long time. Satisfied and happy.

As for Xiao Yansui, when she was drinking fish soup, she was still thinking about the ratio of cement in her mind. These days, she has been thinking about various interesting things. What's more, as a relatively pure science student, In terms of empathy and expressing feelings, it is indeed not as fine as those ancient literary giants, who blended in with each other, and expressed all kinds of emotions...

However, no matter how calm Xiao Yansui is, thinking about construction every day, Xiao Song always misses his granddaughter.

In Xiao Song's eyes, Xiao Yansui is naturally still a child who has not grown up. A child is very curious. After returning to his hometown, his excitement has not subsided. After a while, everything around me is almost done, and it is inevitable that I will start to miss home...

After a little deliberation, before Xiao Yansui showed homesickness, Xiao Song directly smiled with a gentle and concerned voice: "Did Liu Niang feel homesick these days?"

"Ah?" Xiao Yansui, who was still trying to think about several common ways to increase the strength of cement, came back to his senses, blinked his eyes, and hesitated uncertainly: "Well, it's okay! Come back later tonight room, I will write a letter to Aye, Niang and the others."

Xiao Song also blinked, still holding chopsticks in his hand, seeing Xiao Yansui who was obviously thinking about something just now, asked with interest: "What was Liu Niang thinking just now?"

"Building a house!" Xiao Yansui suddenly became interested, "Isn't there a yard in the back that I plan to renovate? I happened to read some uses of limestone after calcining in a book on alchemy by Taoists a few days ago. I think it can be used. At least, I will experiment twice first, and when it is almost autumn and the sky is clear, it is just right to start building at that time!"

In fact, at this moment, people in towns and villages generally choose to build houses around Qingming and before spring plowing and farming. In the three seasons, the moisture in the mud embryo on the wall of the house has almost dried up, and it is possible to live in it when it is cold in winter.

However, these things that farmers need to consider are in Xiao's house, so there is no need to worry too much. Besides, cement has a quick-drying method, and the weather in autumn is dry and rainless, which just meets Xiao Yansui's requirements. As for this summer, she I just have time to tinker with the different ratios of cement first, and then do a simple experiment to record more suitable data.

Xiao Song: "..."

Xiao Song:? ? ?

Did he really understand? As Xiao Yansui talked about excitement, the speed of his speech became faster and faster, and the old man became more and more confused.

While talking, Xiao Yansui picked up the spoon, took a sip of the delicious fish soup, licked his lower lip, and continued to talk to Xiao Song: "By the way, Aunt, when the old courtyard is being rebuilt, I plan to put it on the floor. Bury some tunnels underneath, "It's actually the heated kang in the north, but Xiao Yansui couldn't help but want to turn this thing into a floor warmer. After all, the average temperature in Shanhai Town is no better than that in the north. It's really good to make a heated kang and sleep on it." It is quite easy to catch fire on it, and laying it on the ground is just one way to ensure that the ground is dry and comfortable. Second, sleeping on a wooden bed in a warm room is definitely better than sleeping on a heated kang The upper body is comfortable, isn't it?

In fact, when Xiao Yansui was thinking about it, she also considered the problem of running water through the pipes in the house. However, Tang Chao does not have a water pump at the moment. It's not easy, unless she just wants to improve the ancient water wheel...

In addition, Xiao Yansui did not specialize in this after all. Although the manual DIY ability of the emperor of science and technology often has magical operations that break through the sky, most of those models are small-scale models that are really used when building a house at home. Playing with new ideas and new designs, Xiao Yansui is also afraid that he will accidentally take it off, and when unexpected troubles arise later, there are omissions in the model, just dismantle it casually, and the newly rebuilt house cannot be said to be dismantled Just dismantle it?

However, in the process of renovating the house this time, she plans to keep more drawings. When she renovates other yards next time, with experience, she will naturally dare to continue elsewhere...

Speaking of excitement, Xiao Yansui had long since neglected to eat. In fact, Xiao Song, who was sitting next to her, just held his chopsticks in a daze, and didn't move for a long time.

Although Xiao Song couldn't understand many words and sentences, so it was inevitable that his expression was a little dazed, but he still listened carefully and wrote down his granddaughter's words, and then, Xiao Song suddenly discovered that Xiao Yansui She has already arranged her various schedules for the spring of the coming year, and seeing her granddaughter's unfinished appearance, Xiao Song has no doubts that when Xiao Yansui gets acquainted here, she will have a better understanding of the specific situation in Shanhai Town After that, she must have more jaw-dropping plans to implement.

As for what I was worried about at the beginning, Xiao Yansui's initial excitement and freshness had passed, and the little girl would definitely be homesick, it didn't exist...

After all, Xu Guogong's mansion is on the main street of Chang'an City, and there are many relatives of the emperor and officials in the court. No matter how much Xiao Yansui's family dominates, she will definitely not be able to demolish her own house. In contrast, when she arrived at the Xiao family's old house where the emperor was far away, wouldn't she be able to spread her hands and feet and toss with all her strength?

"..." Thinking of this, Xiao Song couldn't help being a little dumbfounded.

Just like when he was in the Hexi Festival, among the soldiers under his command, some were full of ambition and wanted to go to battle to kill the enemy, and then make meritorious deeds and return home. Naturally, there were also people who were full of nostalgia and just wanted to leave the battlefield safely and return home as soon as possible. ...

As for Xiao Yansui, before, everyone thought that the little girl's mind would be more delicate, and it must be the latter, but now, Xiao Song suddenly realized that Xiao Yansui was actually the former, and there was actually nothing in her granddaughter's mind. Those sentimental feelings, in her bones, are actually the same as herself, with a kind of indifference and ease...

·

After the meal, the important point is that he happened to report to his grandfather Xiao Song about his many plans in detail, which means that these plans have passed the bright road. The satisfied Xiao Yansui strolled back to the room, taking advantage of the After the night came up and the weather was cool after the rain, he took the three dogs and wandered around the Xiao family's old house for a while, taking a walk to digest food while continuing to think about cement.

After going around in a circle and returning to his own yard, Xiao Yansui untied the leashes from the three dogs, handed them to the maidservant who was next to him, and went straight into the study.

She pinned a large stack of books spread out on the table and closed them with bookmarks, then took out a few sheets of paper, took out a self-made dip pen, and began to sort out the questions about cement production one by one.

First of all, the main raw material of cement is limestone.The limestone used to make limestone, because it is widely distributed in various regions and easy to mine, was actually a material with a relatively high utilization rate even in ancient times.

Then, the secondary component of cement is a small amount of clay, which accounts for about one tenth of the proportion; and a smaller amount of iron ore powder, which is about one or two percent.

As for the exact method, it is almost to mix limestone raw materials, clay raw materials and a small amount of metal ore powder in proportion, and then grind them into finer materials. Although there were no industrial machinery in ancient times, this initial raw material preparation work, directly You can use the common millstones in the village and fields.

Then, put the mixed material into the kiln for firing. After a relatively complicated chemical reaction, the limestone finally forms tricalcium silicate, which is precipitated in a very small crystal state. The precipitated product is the clinker of cement. .

This kind of cement clinker can basically be regarded as finished cement. Of course, because of the different content and types of clay and metal minerals, the cement will also show different characteristics. However, for Xiao Yansui, she just wants to When building a house in my hometown, the slight difference in the period can actually be ignored...

Finally, after adding water to the cement clinker to form a slurry, after a period of time, the cement will condense into a hard block, which is basically considered done!

As for the cement, in addition to what she thought of at the beginning, besides being used to build a house, in fact, it can also be used appropriately for the edge sealing of the heated kang on the ground. After that, if you want to dismantle it in the future, you will have to spend more effort...