Finally, there was the mixing of several ingredients, but she couldn't quite remember the exact proportions.
However, what we generally know is that the slag ash should be added the most, followed by the amount of lime, and finally the gypsum used to adjust the setting and hardening time, which should be added in the smallest amount.
In short, if you don't know, then give it a try.
She mixed several samples in different proportions at once, and to save time, she placed them directly next to the stove to heat them up and speed up the solidification process.
She tested each sample, examining its hardness, solidification speed, and stability, ultimately finding the optimal ratio.
She then found river sand to mix with cement mortar. Generally speaking, the most common ratio of cement to water to sand is 1:0.6:3.
However, her homemade cement probably doesn't have the same strong bonding properties as traditional cement, so the proportions need to be adjusted according to the actual situation.
She went outside and picked up a few stones. The ordinary stones were mostly irregularly shaped, looking as if they had been arbitrarily arranged.
Zheng Quchi squatted down, picked up two stones, and glued their barely flat sides together with cement mortar version 1.0.
Because the blacksmith shop had many furnaces and the temperature was high enough, it only took about half an hour for her to let go and find that they had stuck together.
Under normal circumstances, Zheng Quchi estimated that it would take at least a day for the mixture to solidify.
She took a blunt knife from the shelf and chopped it down hard at the spot where the stones were stuck together.
Click!
There was no notch, but cracks were left, which indicates that the hardness needs to be improved further.
Perhaps the ratio of cement to sand was incorrect, or perhaps she forced the water to evaporate too quickly using high furnace temperatures, or perhaps the cement mortar lacked stability...
Let's try one of them first. She used all the remaining cement mortar, some of which was remixed and some of which was still mixed in the original proportion, to plaster the stones.
This time, she plans to wait for it to dry completely on its own before seeing how it goes.
These past two days, because the construction site has to deal with the assassination of Yuan Sui and Yin Xiao, the craftsmen have basically stayed in the shantytown during the day without doing any work. However, because of the "special treatment" given by Wei Yao, she can sneak in and out freely. Whenever she has free time, she sneaks back to Fuxian to check on the progress.
She nervously examined the stones after they had dried naturally and found that they were mostly firmly attached.
In particular, there was one set that was very difficult to separate no matter how she threw or smashed it.
"It's done! As expected of me!"
Just as Zheng Quchi was feeling elated, a hand reached out from behind and took the stone from her hand.
"Sang Xuanqing, is this what you had Wei Yao do under the guise of official business to vouch for you and get into the military workshop to make?"
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