"Commander Yan, the concrete of this C60 box girder in our factory is different from others.

Unlike other ordinary concrete, there are some factors that have little effect on the performance of concrete below strength class C40.

However, it has a significant impact on the performance of C60 and above concrete.

Through a large number of tests, we determined that the water-glue ratio was 0.34 and the sand rate was 38%, and in order to ensure that some uncertain factors had an adverse effect on the workability and strength of concrete, we carried out more than ten repeated tests.

The average strength value should not be lower than the prepared strength value, and the stability of the concrete mixture's workability is observed.

A special person is arranged for each concrete test to carefully test the workability and strength of the concrete, and test the actual bulk density.

When the absolute value of the difference between the measured bulk density and the assumed bulk density of the concrete mixture is always controlled within 2%......"

The technical person in charge of Jinmen box girder factory, Yan Jiecheng and Lao Xie who inspected the work, seriously talked about their box girder production technology.

Under the leadership of the person in charge of the factory, Yan Jiecheng carefully observed all production links.

In the pouring workshop, Yan Jiecheng watched their entire operation process.

They first poured the bottom plate, which was poured in layers from low to high, and then the roof and ribs were poured.

Yan Jiecheng pointed to the workers who were working, and asked the technical person in charge on the side: "When pouring the box girder, how do you control the compactness of the concrete?" ”

Lin Gong, a 50-year-old technical person in charge on the side, said: "For the compactness problem of box girder concrete, we use plug-in vibrator and plate vibrator vibration to solve it.

The bottom plate is a plug-in vibrating rod, and some parts can be beaten with a wooden mallet.

The installation position of the plate vibrator is unified, and the power is the same, the vibration is turned on uniformly, and the vibration time is controlled at 15~25 seconds.

When using the vibrator for plug-in vibration, we insert the concrete between 50~100mm and not less than 50mm away from the formwork to prevent the formwork from being damaged.

The moving distance of the vibrating rod is 1.5 times the radius of the vibrating rod, that is, not more than 45~60cm. ”

After listening to this, Yan Jiecheng and his party couldn't help but nod.

The person in charge of the factory and the person in charge of technology saw Yan Jiecheng, and they just looked at it and didn't talk much.

In fact, they were very nervous, and the two of them knew in their hearts that the meaning of the existence of their factory and their leaders was to serve the Beijing-Tianjin passenger dedicated line.

If their products were killed by Yan Jiecheng, then their factory would have no value in existing.

Lin Gong, the technical person in charge of their factory, felt a lot of pressure to explain the technology and process of box girder production to Yan Jiecheng.

After all, everyone knows that Yan Jiecheng once studied with Mao Lao, and he can be said to be a leader in the industry for the construction of bridges.

In addition, every time Yan Jiecheng's questions are very standard. Also very professional. This made Mr. Lin's pressure even greater.

Yan Xie saw that the concrete box girder was poured and vibrate, and after the roof was brushed, these workers covered and moisturized in time.

Then he asked: "Lin Gong, how do you maintain the box girder after it is dismantled?" ”

Lin Gong hurriedly said: "Commander Yan, after the beam is dismantled, we will carry out uninterrupted spraying and moisturizing in time, and this process will not be less than seven days." ”

Yan Jiecheng nodded and said, "Well, Lin Gong, this is very important.

If the maintenance is not done well, the beam will crack, affecting the overall quality. ”

Then Yan Xie Chengjian saw that there were several workers next to him, carrying manual sprayers on their backs, to do maintenance work on the poured box girders.

Then he called one of them over: "Master, can I see your kettle?" ”

The worker walked over and didn't speak, but looked at the factory manager and the forester first.

Lin Gong said with a smile: "Lao Zhang, this is the commander-in-chief of our superior unit. ”

This worker, Lao Zhang, hurriedly took off the kettle. handed it to Yan Jiecheng and said, "Leader, take a look." ”

Yan Jiecheng took the kettle, opened it and went to see that the water inside was very clear.

Then I put my hand in and tested the water temperature, which is also a normal level.

He handed the kettle to Master Zhang.

Then, Yan Jiecheng said with a smile: "Okay, Master Zhang, you can get busy after I finish reading." ”

Everyone was a little unclear about Yan Jiecheng's actions, and only Lin Gong was thoughtful.

At this time, Lin Gong suddenly looked at Yan Jiecheng and said, "Commander-in-Chief Yan, could it be that this water will also affect the quality." ”

Yan Jiecheng nodded, and then said to everyone: "Everyone may not know.

For the maintenance of concrete castings, this water is very important.

First of all, we all know that the water for the maintenance of concrete castings must not be alkaline.

However, one thing that is easy for all of us to overlook is the water temperature.

Imagine what would happen if a piece of red-hot iron was suddenly thrown into cold water.

Or, a frozen hard piece of meat, suddenly scalded with boiling water.

Both of these alter the properties of the substance itself.

Therefore, the temperature difference between the water temperature and the concrete surface of the box girder shall not be greater than 15 °C.

Now this season, it's not a big problem. But in winter and summer, be careful.

After all, what we are doing here is a box girder, which is different from other concrete casts.

The requirements for its strength and tensile strength are very high.

All aspects of the work must be done well, and the quality must not decline because of the sloppiness of one of them. ”

Everyone listened to Yan Jiecheng's words. After thinking about it for a while, I think it does make sense.

They didn't expect that in the production of box girders, even the maintenance of the water temperature would have such high requirements.

Yan Jiecheng glanced at the director and forestry workers of the factory.

said: "We factory, there is no big problem with the production process and process. Later, the quality inspection department will conduct a quality inspection on all your box girders. If qualified, then we can leave the factory. ”

The two hurriedly said to Yan Jiecheng: "Thank you, Commander-in-Chief Yan, for your recognition of our work with the headquarters. ”

Yan Jiecheng waved his hand and said, "Thank me for what to do?" It's all the result of your efforts.

If the box girder you produce is unqualified, then no one dares to let the box girder with these problems leave the factory, do you say this is the truth? ”

When they heard this, they all laughed.

They are not afraid of the inspection of the quality inspection department at all. After all, these box girders have been inspected by their own factory.

Unqualified products, they have already smashed them off.

After reading the finished product, Yan Jiecheng and the others went to see the raw materials again. Especially for the steel bar, Yan Jiecheng looked at it very carefully and carefully.

For several box girder steel bar keels on the production line, Yan Jiecheng took the vernier caliper and carefully checked the steel bars in each place.

During the inspection, he found that the steel bars used in the beam factory were in line with the design requirements. There are no other defects such as rust in the steel bar.

The welding of the reinforcement cage is also very standardized. For the length of the reinforcing bars, they are all within the design specifications.

Therefore, Yan Jiecheng was quite satisfied with the overall inspection of the box girder field.

Of course, there are some other downsides. For example, the yield is low, the production efficiency is not high, and especially the product quality control is unstable.

There are also these problems, and they are basically common to all factories in this era.

According to Yan Jiecheng's inquiry, their defective rate actually reached 10%.

But in the face of this situation, Yan Jiecheng had no other good way.

After all, the older workers are now retired, and the younger workers have not yet grown up.

Today, the backbone of the production force in each unit is actually the workers trained in those ten years.

The technical level of these workers is uneven, and the professional quality is also very different from that of the retired group.

Coming out of the box girder factory, Yan Jiecheng and his party turned left into the concrete sleeper factory next door.

Director Hu of the sleeper factory also waited from noon to afternoon today. Yan Jiecheng also followed them in front and visited the box girder factory.

At this time, when he arrived at his territory, Yan Jiecheng said with a smile: "Director Hu, this is your territory, you have to give us a good introduction to the situation of your factory." ”

When Director Hu heard Yan Jiecheng's joke, he also smiled and said: "Commander-in-Chief Yan said that he was joking, our factory is not the headquarters after all." We are all your soldiers, and this is not your territory. ”

When Yan Jiecheng heard Director Hu's words, he smiled and said to Lao Xie: "Deputy Commander Xie, listen, our Director Hu will say good things." ”

Then, Yan Jiecheng turned his head to Director Hu and said, "You, if the work is not done properly, there is a problem with the quality of the sleeper." I won't stop fighting with the board of the command because of two good words. ”

When Director Hu heard Yan Jiecheng say this, he was also embarrassed.

That's what he is.

When I see the leader, I always like to pat myself on the back. I always feel that I don't want to hit a smiling person. Anyway, put your posture a little lower, and the leader will look pleasing to the eye, so he won't be too embarrassed for him.

He's been doing this all these years, and every time he's been invincible.

Unexpectedly, this time he was deflated here by Yan Jiecheng. Yan Jiecheng ignored him at all, and teased him in public.

Therefore, Director Hu hurriedly put his mentality right.

Said solemnly: "Commander-in-Chief Yan, don't worry. Our factory is produced in strict accordance with the design requirements and the technical documents issued by the headquarters. We have always strictly controlled the quality of the sleepers. ”

Yan Xie Cheng smiled and said, "Okay, Director Hu is confident, now let's go to the production line and take a look." ”

When he arrived at the production line, Yan Jiecheng saw that everyone was working in an orderly manner, and he didn't pay too much attention to the people who were inspecting them.

Yan Jiecheng couldn't help but nodded, and couldn't help but look up to this Director Hu a little higher.

I didn't expect this person, although he looks a bit of a juniper on the surface, but he also has some real skills.

In addition to the strength requirements, there is also a key technical problem with the concrete sleeper. That is, there are certain requirements for the anchored bolts and the level of uplift.

So Yan Jiecheng specially observed them and the whole process of anchoring bolts.

I saw a worker, mixing sulfur, asphalt, and mortar in a certain proportion. After stirring well, it is the special anchoring agent.

The anchoring agent is poured into the anchoring hole reserved for the sleeper and the bolt is placed vertically. Later, a small stick is used to tamp the anchoring agent.

Seeing this, Yan Jiecheng said to Director Hu: "Director Hu, your factory must strictly manage sulfur.

Don't be careless, after all. But the raw materials for the production of gunpowder are really wrong, and you and I can't afford to take this responsibility. ”

Yan Jiecheng's words were not a joke.

In these years, all the workers are, I regard the factory as my home, and the factory is my family.

Bringing a little bit of corners and corners from the factory is common. Some people even steal the production materials in the factory.

Something else, at best, is the loss of state property. But this sulfur is different, if someone really steals it, makes their own black powder, or takes it out and sells it, it will pose a huge threat to society.

Therefore, Yan Xie Chengcai specially reminded Director Hu.

When Director Hu heard Yan Jiecheng's reminder, he said solemnly: "Commander-in-Chief Yan, don't worry. For sulfur, our factory is strictly managed. We have made strict calculations on the amount of each anchor hole.

If the number of applications per worker per day does not match the number of anchors, we will conduct a strict review.

Workers are also screened daily by the Gatekeepers. ”

Yan Jiecheng nodded after hearing this, and said, "Well, you just know the severity of this matter.

However, the anchoring agent is deployed on site, the proportion is not easy to control, and the anchoring quality is uneven.

There will also be certain loopholes in the management of sulfur.

Therefore, I suggest that you can research and develop the anchoring agent of the finished product by yourself or in conjunction with other units.

Besides, all of you must have a market economy mindset.

I estimate that if this kind of finished product is successfully developed, you can not only use it yourself, but also sell it to other units.

Now, we must not wait, we must not rely on it.

We must learn to develop new products, new processes, and new markets by ourselves, and take the initiative to seek opportunities.

Otherwise, after the completion of the construction of our Beijing-Tianjin passenger dedicated line, what will you do with these factories? Is it going to close down, or is it that the state spends money to support everyone in vain? ”

Not only the director of the concrete sleeper factory, Mr. Hu, was a little stunned when he heard Yan Jiecheng's words. Other factory directors who followed the exchange and learning were also deeply shocked by Yan Jiecheng's words.

These are questions that they never think about. After all, they are all state cadres, and it is impossible for anyone's salary to be missing them.

The factory has always been assigned production tasks and production funds to them from above.

It's the first time I've heard of it by myself.

Therefore, some people scoffed at Yan Jiecheng's statement in their hearts.

If it weren't for Yan Jiecheng being in charge of his own leadership, they might have refuted it a long time ago.

Yan Jiecheng looked at everyone's faces, and he also knew what they thought. Knowing that it won't be able to change their thinking for a while.

I won't say too much about this issue. After all, to reverse their concepts, it is not a sentence or two that can be changed.

They can only be forced to change by the environment, or they will be eliminated by the environment.

Change or eliminate, this is not really a choice question for them.

It's a fateful ending.

Some people are born with the courage to try, dare to challenge, and have a high ability to accept new things.

Some people are cautious all their lives, conformist, afraid to try, and reject new things.

Yan Jiecheng knew this situation. He also knows that the development of the times must be a process of breaking one shackle after another.

If you can't untie the shackles on yourself in time, you will eventually be eliminated by society.

I'm sorry, but I missed three paragraphs when I revised it. has been modified.

(End of chapter)