"This is……"
After Gu Changfeng and others saw clearly what was in the forklift bucket, they all cast inquiring glances at Lu Yu.
This off-white powdery substance is definitely not soot, but it just looks like it gives people a very dry feeling.
"What are you looking at? This is quicklime. Have you never seen it before?"
"Quicklime? What are you doing with this?"
Hearing Lu Yu's answer, Gu Changfeng and others became more and more confused.
This coal powder can also be used as fuel to burn down the creepers on the wall.
But what is the use of quicklime? Is it possible to mix it into the soil and change the acid-base balance of the soil?
"Since using fire doesn't work, then we will use water. Think about it, why did the burning of the coal pile stop before?"
Lu Yu had a proud look on his face and gave it a try.
"The reason why the burning of the coal pile stopped? Because there is no combustion accelerant. The ivy rattan will release flame-retardant gas during the burning process, which isolates the air around the flame."
Zhang Tiehua then said that when Xiaoran was explaining, he also listened very carefully.
"The answer is correct, but have you ever thought about the composition of the flame-retardant gas released by the ivy rattan?"
Lu Yu glanced at Zhang Tiehua with great admiration, just like a teacher seeing a smart student.
"What is the composition of the released flame-retardant gas? This..."
Zhang Tiehua was stunned for a moment when Lu Yu asked him this question.
Not only him, but also Gu Changfeng and Yu Libo hesitated for a moment.
They didn't think about this problem in detail. Since the fire couldn't burn, it seemed pointless to explore the composition of the flame-retardant gas.
"It's carbon dioxide! Right? Uncle Lu Yu!"
Xiao Ran raised his hand and rushed to answer.
"Yes, it must be carbon dioxide. Although I don't know the characteristics of these mutant plants, I think since they are mutant plants, they should retain some of their previous characteristics."
"Most plants use oxygen and carbon dioxide in the air to maintain the basic operations of life. After mutation, these two gases have also been used to a greater extent."
"Oxygen can help with combustion, so the flame-retardant gas released by the ivy must be carbon dioxide."
"But the flame-retardant gas is carbon dioxide. What does it have to do with the quicklime you got?"
Zhang Tiehua scratched his head, still not understanding what Lu Yu wanted to say.
"Quick lime, also called calcium oxide, is the most common desiccant in industrial production. When mixed with water, it will not only generate a lot of heat, but also generate a new substance - calcium hydroxide."
"Calcium hydroxide can absorb a large amount of carbon dioxide in the air and form calcium carbonate."
Having said this, Lu Yu raised his chin towards the residential building in the distance.
"As long as most of the flame-retardant gas released by the creepers can be absorbed by calcium hydroxide, the coal pile can be burned normally, and the plan to clean up the creepers can proceed smoothly."
"So this is what you had in mind..."
Gu Changfeng nodded, finally understanding what Lu Yu was thinking.
Soon, Lu Yu drove the forklift through the wall and poured a bucketful of quicklime onto the previous coal pile.
Then we got plastic water pipes from next to the coal yard, and used the siphon effect to get some water from the nearby reservoir into the bucket.
Repeat the previous action again and pour the water from the bucket onto the quicklime.
As soon as the water came into contact with the quicklime, a thin puff of smoke rose up.
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Lu Yu had no intention of starting a fire. He drove the forklift back to the wall and watched quietly.
The slaking reaction that occurs when quicklime is mixed with water can produce a high temperature of nearly 700 degrees Celsius.
At this temperature, even raw coal gangue can be ignited, let alone pulverized coal that has been processed into fine powder.
Soon, the carbon dioxide surrounding the coal pile was absorbed by the calcium hydroxide, and the pulverized coal was completely ignited during the slaking process of quicklime, burning brightly.
Although attached to the wall, the creeper tries to do it again, releasing carbon dioxide that prevents combustion.
But this carbon dioxide is not enough for the slaked lime to absorb.
It didn't take long for the high temperature to dry out the moisture in the rattan. Amidst bursts of crackling and popping sounds, the flames began to spread from bottom to top.
The ivy attached to the floor finally felt threatened and could no longer remain still.
The dense vines were like long green worms of uneven thickness, constantly beating the burning flames.
But plants are still plants after all, and even plants that have undergone mutation are still unable to compete with the blazing flames.
Lu Yu's calculations were very accurate. The amount of coal pile used would not set the entire building on fire.
After burning most of the ivy, the flames began to slowly weaken, leaving only the smoke-blackened wall and the half-dead ivy roasted by the high temperature on the wall.
Before the flames were completely extinguished, Lu Yu clapped his hands and said.
"It's done, let's get ready and go upstairs to find someone!"
"You're really good at it..."
Gu Changfeng, who remained on the sidelines, spoke now, his eyes full of admiration.
To be honest, he actually thought that Lu Yu's setting fire to the ivy was a bit of a fuss at first. After all, he had never seen mutated plants after the apocalypse, so he didn't know how powerful they were.
But when he saw the creepers with dense wounds on the wall twisting and twitching like long worms, he knew how outrageous his previous thoughts were.
Do you want to ignore the creeper and just walk into the building?
Those quiet rattans were afraid that they would wrap around him and strangle him on the spot.
"Nonsense, learn math, physics and chemistry well and you won't be afraid of traveling all over the world. Officer Gu, lead the way!"
Facing Gu Changfeng's praise, Lu Yu showed no humility. He held the stick in his left hand and the shield in the right, and urged him in an old-fashioned way.
Just when Gu Changfeng was about to take out his pistol and walk in front, Yu Libo from behind walked out of the team.
He had no other weapons in his hand, just a police shield.
"Let me lead the way... After all, I am looking for my parents..."
Yu Libo's voice was very soft when he spoke, and there was an undeniable air of sadness and despair.
It should be said that when he first entered the thermal power plant, he did still have hope in his heart that his parents were not dead.
But after experiencing the series of events just now, Yu Libo's hope has been shattered.
Now he just wants to see the bodies of his parents and find a place to bury them properly.
After hearing Yu Libo's words, no one spoke.
Even the venomous Lu Yu didn't speak, and silently made way for Yu Libo.
The residential building in front of me is a bit old and is not equipped with an elevator.
There is only one staircase to go up and down, and each floor is divided equally between two households.
All the way up, the walls and floor are covered with dark brown roots and vines.
These rattans do not move freely like the exterior walls, but are quietly adsorbed on the surface, just like decoration.
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The narrow corridor was silent, with only the slight footsteps of Lu Yu and others echoing.
Yu Libo led the way and soon reached the fifth floor.
Compared with the floors below, there are obviously fewer ivy roots here, but the greenery on the exterior wall is thick, and there are still many ivy vines that can move freely.
As if sensing the movement in the corridor, many ivy vines poked their way in from the window.
Like thin green snakes, winding forward.
"This ghost is not dead yet..."
Zhang Tiehua saw several canes crawling into the window, and he uttered a curse word.
At the same time, he turned the roller in his hand, and it seemed that he was preparing to poke these moving rattans with the other end.
"No, don't move in a hurry yet."
Gu Changfeng saw Zhang Tiehua making tentative moves and quickly stopped him.
Although the vines had climbed into the corridor from the window, this did not mean that their whereabouts had been exposed.
If he rashly tests and disturbs those creepers, they will have to be distracted to deal with it.
"Officer Xiao Gu is right, Huazi, don't be too curious..."
Lu Yu also added, his eyes fixed on the rattan climbing in from the window.
"Okay...I'll listen to you..."
Zhang Tiehua was not an unreasonable person. Knowing that what Gu Changfeng and Lu Yu said was correct, he gave up the idea of testing.
Yu Libo stood in front of the door and knocked the door gently.
"Dong dong dong..."
As everyone expected, there was no sound of footsteps answering the door.
Everyone said nothing and turned their attention to Yu Libo.
But Yu Libo lowered his head, unwilling to accept reality, and knocked on the door again.
"Dong dong dong..."
There was still no sound from the door, but the knock on the door attracted the rattan climbing in from the window.
The mutant ivy seemed to be able to hear the sound and began to slowly spread towards the location of everyone.
"Damn, the ivy is coming!"
Zhang Tiehua has always been paying attention to the ivy outside, and he was also the first person to discover it at this moment.
"Libo, don't you have a key? Can't you just open the door and go in?"
After hearing Zhang Tiehua's warning, Gu Changfeng became a little anxious and asked.
But Yu Libo remained unmoved and continued to knock on the door for the third time.
"Dong dong dong."
Just when everyone thought there would be no response from the door, a rustling sound suddenly came from inside.
It was like someone was dragging a pair of tattered slippers on the wooden floor.
This movement shocked everyone outside the door. Could it be that Yu Libo's parents are really still alive and survived in this residential building full of ivy?
Yu Libo was a little dazed after hearing the sound from the door, and didn't react for a while.
"Libo, there is a noise at the door! Your parents may still be alive!"
Gu Changfeng's face became obviously happy, and he patted Yu Libo's shoulder excitedly.
Although it was not his parents inside the door, at this moment, the feeling of rekindled hope made Gu Changfeng feel very excited.
"My parents...are still alive..."
Like a walking corpse reborn, Yu Libo's lips wriggled and he murmured to himself...
(End of chapter)
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