This burned loess is also called earth cement. The main raw material is loess. There are also 10% or 20% of slurry lime, and less than half a slurry gypsum.

Yellow mud is easy to deal with. They are everywhere here. Cure lime is also ripe lime. You can get it by adding quicklime to water. Only 100 kilograms of soil cement only require 100 kilograms of slurry lime, and the dosage is not particularly large.

As for semi-water gypsum, you can also buy natural gypsum to process. This is simple. Control the heat slightly and burn the solid gypsum into powder.

Since they started making paper here, the amount of lime is increasing. Recently, people often come to them to sell lime. There are carts carrying loads. If Luo Yong looks at the right one, he will buy some.

Lime is not produced in Xipo Village, but it is not a rare thing. If some villagers in some villages can find greystone on the hills near their homes, they can pick up the stones and pile them up, burn them into powder on fire, and then they can be carried out and sold for money. If a load of lime can be sold for seven or eight cents, even if it is quite good, recently, more and more people sell limes, and the price is getting lower and lower.

I bought some to make paper earlier, but the amount was not too large. A load of lime was not expensive, no matter whether it was five or six or seven or eight, Luo Yong didn't think it was expensive. Now it was used to burn soil cement, so the price was not cheap.

In addition, gypsum from this era is only available in pharmacies, and Luo Yong is also worried that the price will be higher.

Before dawn that day, Luo Yong set out early with the Dinghu people who came to the city to deliver goods.

It rained two days ago, and there were many puddles on the dirt road entering the city. Luo Yong was fine. After all, there was a donkey cart. Those who were determined to walk on both legs and stepped on the mud in a short while.

Luo Yong was thinking about the feasibility of paving roads with soil cement. The soil cement is mainly made of yellow mud, which is lower in strength than ordinary cement. It is okay to use it to build ditches to prevent seepage and leakage. If it is used to build roads, it is afraid it will be impossible to eat or drink.

Maybe they could pave a trail with earth cement on one side of this road for walking and bicycle access?

When the soil cement is burned out, Luo Yong first needs to build several fermentation tanks for the production of Eucommia ulmoide, and then start building a ditch.

Next is probably the road construction matter. Luo Yong cannot do this by himself. He has to see what others mean. After all, the lime and plaster are things that require money to buy. Luo Yong still owe a lot of debts and can't afford that money.

Thinking about things in my mind, the itinerary for a morning was not so long. After entering the city, Luo Yong went directly to the pharmacy for those who were delivered by those who were Dinghu and those who were selling goods.

There are only two medicine shops in total, one big and one small, from Shi County. Entering from the main road at the gate of the city, there is a small medicine shop in an alley not far ahead. The medicine shop has a good reputation. When Luo Yong was walking in the county town, he had heard people mention it, so this time he went there first.

"Why is Sanlang coming today?" The owner of this pharmacy shop is also a doctor in the restaurant. He is a thin man in his early forties.

"I'll buy some plaster." Luo Yong said with a smile.

"What's the point of buying plaster? But to clear the fire?" The shop said and went to the counter, holding a small scale in his hand, and then he wanted to open a wooden cabinet lattice with plaster.

"I bought it for other purposes, so I need to buy more. How much does this gypsum cost?" Luo Yong asked.

"How much do you want?" the other party turned around.

"If the price is not too expensive, I will have to pay half a load first." Luo Yong replied.

"That's what?" the other party was surprised.

In this era, gypsum has not been developed for any other purpose except as medicine. The owner of this store really couldn't think of what to do if Tongluoyeng bought so much gypsum.

But he didn't ask too much, just said: "I have more than one dou of good Anyi gypsum in Curry, but if you don't use it as medicine, ordinary gypsum should be fine. I have two and a half dou of gypsum produced in Pingyi County. If you want it, just take eight cents."

"?" Luo Yong was surprised. Two and a half dou of plaster cost only eight cents, which was cheaper than he thought.

"If you want it again in the future, I will tell you and the porter on Pingyi's side, and let someone take the plaster directly to Xipo Village. I would like to give you a load of twelve and three cents." The other party said again.

"Then I'll bother sir." Luo Yong thanked quickly. Although he didn't understand the market, it took two days to go from Pingyi County to Xipo Village. If he came from a farther place, the journey would be even longer. A load of plaster costs twelve to three cents, which would not be expensive.

"What's that? Those gypsums are born with natural growth, and those with different quality are not easy to use as medicine. If you can use them there, you can make a living for those porters." Being a porter is definitely not as profitable as selling gypsum by yourself. Besides, if you sell it to Xipo Village, you can still sell it with a little tofu or something on the way back, and you can also earn some money and food.

After buying plaster, Luo went out of the alley in a donkey cart. Outside was the most spacious and straight street in Shixian County. It was noon, and the streets were also a bit lively.

On the other side, several porters carrying loads walked by. Luo Yong looked over and saw the weight-bearing shoulder pole on their shoulders, sweat on their faces and body, and tattered straw sandals on their rough soles.

Such hardship is very common in such an era.

But this time, Luo Sanlang no longer lowered his eyelids, and then walked past them with a little complicated mood. He just sat quietly in the donkey cart and watched these people. When the people approached, he smiled and greeted them.

"What are you carrying? Where are you carrying?" Luo Yong asked with a smile.

"This is the salt from Anyi, and I have to carry it to the Ma family's store." The porter who led the head put down the load, took off the hat and fanned it, and asked with a smile: "It's Luo Sanlang."

"How do you know I am Luo Sanlang?" Luo Yong had no impression of the people in front of him.

"Du said that Luo Sanlang is gentle and handsome, and has a very arrogant big donkey. I just looked from afar, and I guess you are Luo Sanlang." This man was tanned by the sun all year round. When he smiled, his big white teeth looked particularly white.

"I heard that the gypsum in Anyi is also excellent." This is what Luo Yong just heard from the medicine shop. At this time, Anyi, which was later Yuncheng, had a Yuncheng salt pond.

"The gypsum-producing one is Pinglu, not too far from our Anyi, but they are in Duji Road, Shanzhou, and not in the east of our Hehe Road." The other party explained Luo Yong's confusion.

"So that's the case, but I'm wrong." Luo Yong silently remembered this matter in his heart. Today, there is no Internet like later generations. If you don't understand anything, you can check it online at any time, so memory and accumulation are particularly important.

"Why don't you push it with a car?" Luo Yong asked again.

"I originally used a car to push it. It rained two days ago and it was difficult to drive on the mountain roads. The car could not pass through Luliang Mountain, so I had to use a shoulder pole to carry it." The other party replied.

"Thank you for your hard work," Luo Yong said.

"What's that? In the past, the most feared thing about those who picked salt was rainy days. At that time, oil paper was expensive, and I didn't know how much salt I had to pick to buy one. If I didn't buy oil paper and it was raining, it would be really a waste of time. Now, the price of oil paper has been reduced, and we can afford it. No one who picked salt did not know Luo Sanlang..."

Luo Sanlang drove a donkey cart in Lishi County, greeting people from time to time, smiling, and looking like a young man, but on his shoulders, he had already loaded up weight.

Whether in the seventh century or the twenty-first century, Luo Yong's life had a very inconspicuous childhood. Such ordinary and inconspicuousness were always engraved in his bones, making him believe from his bones that he was just an inconspicuous little person and was powerless to do many things in this world.

So when facing other people's suffering, Luo Yong in the past often chose to avoid it because he was powerless. Seeing too much and thinking too much is nothing more than just increasing his worries.

But in this world, who has that ability?

That's right, if there were no miscellaneous things in that space and the memories of two lives, Ta Luo Yong was just an ordinary little person, but who was born extraordinary?

Perhaps what he really lacks is not ability, but courage and courage.
Chapter completed!