Chapter 290 (1/2)

PS: no state today, only 2000, 3:30 Forgive me, gentlemen.

”Come on, put the ash in it.” Keller slowly leads a student to mix plant ash into lime.

Lime, a kind of East-West red leaf ridge, has been used all the time to keep the road clean and dry. The English islands are rainy and sunny all the year round. After frequent rain, the ground is muddy, which brings great trouble to the transportation industry.

But since lime was mixed into the sand and gravel, Camero's road began to be strong, and the hooves of horses and oxen were extremely comfortable to run on. However, Keller knew that this was not cement, but only the solidification caused by lime absorbing the moisture in the land. If the moisture content exceeded the amount that lime could absorb, it would overflow. Although this simple way made Camelot's road easy to walk, he knew that these roads would only be roads in the future, and roads with lime would not be allowed Can be turned into fields again.

But he needs better materials.

There is no better material than cement.

However, in terms of current technology, Keller lacks a chemical of inorganic cementitious materials. The development of this kind of thing is very difficult in terms of current technology, but quicklime is not necessarily.

Raw limestone made by adding plant ash and heating it with limestone.

Now it's the last step, stirring.

Keller first searched for limestone for a long time. Before that, all that was put in the land was lime powder, not real quicklime.

Before that, there was a classification of the processing of charcoal and charcoal, and recently Kailar just built a charcoal distillation plant, and the production of quicklime has been delayed until now.

In fact, the ancient Chinese had a method of making quicklime. After laying limestone and wood in layers and burning it for a week (uninterrupted), pure quicklime powder could be obtained. However, Keller came from modern times, and did not know such a strange knowledge, so he could only solve it with the stupid methods of modern people.

After the charcoal was made, it brought the internal combustion temperature of more than 700 degrees, but Kailar naturally had a way to make it burn more thoroughly, that is, the blast furnace and the bellows.

Blast furnace is to let charcoal combustion temperature polymerization, and the bellows is to transport oxygen to help charcoal combustion more fully.

In this way, the temperature in the furnace is close to the water in the big pot. The water starts to boil and evaporate in an instant. Because of Keller's explanation, no one dares to put his face in the steam, because the temperature of the steam alone reaches the point of scalding.

However, what is not afraid of is that there is a pump pump pump sealed with gum, which is constantly adding water under the tireless input of the two Kailar disciples.

To tell you the truth, this is just an experiment, whether the wet steam lime can succeed.

Two hours later, after drinking ten pots of black tea, Keller opened the lid and got the message - failed!

Well, isn't Keller disappointed.

With just another wave, a small mound of earth was raised.

This is a kiln. It can be used to burn charcoal or lime. Kailar's charcoal production technology is gradually mature, but Carboniferous is still an arduous mining work. Although there are a lot of coal now, most of them are charcoal, which is very valuable.