Huang Daqing said that he was going to elope with Yan Linlin, but in fact he ran away alone!
He didn't want to be responsible for the absurdity of that time, and of course he couldn't stay in Gaofei Concrete Company, so he chose to leave voluntarily, and he didn't even want half a month's salary.
Yan Linlin didn't expect that Huang Daqing was such an irresponsible person, she had it in her stomach, and of course it was impossible to continue working here.
She also said goodbye, and it is said that she returned to her hometown to give birth to her child.
Her titular boyfriend, of course, is gone.
The Goofy Concrete Company lost three people at once, and as for what happened, many people still don't know it!
However, these have not had any impact on Gaofei Concrete, and the busy time is coming again, and this year will be the heaviest year for the construction of the entire shipbuilding base.
Li Fusheng would go to Zhonghai every weekend to participate in the first concrete technician training course of Zhonghai Concrete Industry Association.
This training course is indeed a high-standard class, the teachers are the top experts in the industry, and even the professors of Shuimu University have come to teach, of course, Tongzhou University in China Shipping is the teaching location, and it is a first-class university in the field of architecture in China, so of course, the professors of Tongzhou University are indispensable for teaching.
In addition, experts from the Zhonghai Concrete Industry Association also joined the ranks of the instructors.
Li Fusheng felt that he was so lucky to participate in this training course for concrete craftsmen, and he had also heard a little about Huang Daqing.
He also thought of what happened to him that time, and he was also a little afraid, if he encountered the same thing as Huang Daqing, what should he do?
In March, spring is coming, everything is recovering, the construction site of dozens of square kilometers of the entire Jiangnan Changxing shipbuilding base is also in full swing, all kinds of large construction machinery, tens of thousands of construction workers, on the construction site day and night for the world's largest shipbuilding base.
Of course, Goofy Concrete Co., Ltd. also ushered in the heaviest time of the task, and the planned production volume of concrete every day was more than 5,000 square meters.
Despite this, the quality management can not be relaxed, Duan Yongfu chief engineer organized a full staff concrete technology quality training, and as an internal training teacher, it is Li Fusheng.
This is also Duan Yongfu hopes that Li Fusheng will share the knowledge he has learned from the concrete craftsman training class with the company's employees, and improve the quality and skills of the company's employees, so he has engaged in such a training.
The training is divided into three times, the company's production front-line employees, and now it is three shifts, so the employees who are resting also have time to participate in the training.
This is Li Fusheng's first time as a teacher, how can he not be nervous?
But fortunately, the students are very positive and enthusiastic, which makes him slowly let go.
After the first class, Li Fusheng smiled and said: "If you have any questions, you can also ask me, as long as I know, I will share them with you without reservation!"
” As soon as the words fell, Chen Xiaojiu, the operator of the mixing building, stood up and asked: "Mr.
Li, I want to ask, is the sand and stone used in our concrete, what is the impact on the quality of concrete?"
I don't understand this very well. ” Li Fusheng nodded and said, "Okay, you sit down!"
When it comes to the five major raw materials of concrete, the largest amount is aggregate!
Of course, the quality of aggregate has a very large impact on the quality of concrete, and it can be said that sometimes it is still decisive. ” "For example, in the preparation of high-strength concrete, if the strength of the aggregate is insufficient, then no matter how much cement is used and how much high-quality active admixture is added, it cannot be prepared."
"Therefore, aggregate has a very big impact on the quality and performance of concrete.
For example, the workability of concrete, as well as strength, durability and so on.
Of course, it's also about cost. ” "For example, if the aggregate of concrete, whether it is sand or stone, if the gradation is not good, it will affect the workability of the concrete, and more cementitious materials are needed to fill the voids, and the cost will rise."
"If the mud content of the aggregate is too high, it will not only affect the working performance of the concrete, but also affect the strength and durability of the concrete, so for our Jiangnan Changxing shipbuilding base, the requirements for concrete quality are very strict, because we are a century-old project, and it is also an offshore project, which has higher requirements for the durability of concrete."
"Therefore, our technical quality department, as well as the material department, should pay special attention to the quality of our sand and gravel, although the current quality of sand and gravel in the building materials market is relatively good, but it cannot be ruled out that some bad suppliers, shoddy situation."
Li Fusheng's explanation is still very clear and in place, after Chen Xiaojiu listened to it, he smiled and said: "Teacher Li, it's really good, I understand, I didn't expect it to be really content!"
” At this time, the mechanic Du Quanyou stood up and asked: "I heard Mr.
Li talk about high-performance concrete just now, I want to ask again, what is the specific thing about high-performance concrete?"
” Li Fusheng said with a smile: "Adu, that's a good question!"
I just mentioned it a little bit, and you noticed.
The so-called high-performance concrete is the most mentioned by the academic community in recent years, and it is an important direction for the development of concrete materials.
Our domestic experts' definition of high-performance concrete is that it is easy to pour and compact, but does not affect strength; Good long-term mechanical properties; High strength and good toughness in the early stage; Good volumetric stability; Good long-term performance in harsh environments. ” "Therefore, the requirements for raw materials for high-performance concrete are particularly high.
For example, sand, high-performance concrete must be selected hard, clean, well-graded natural sand, C50 ~ C80 concrete sand should be selected with fineness modulus greater than 2.3, for C80 ~ C100 concrete sand should be selected fineness modulus greater than 2.6 medium sand. ” "Stone is of course also very important, and high-performance concrete must be made of crushed stone with high strength, low water absorption and good gradation.
Generally, the strength of the parent rock should be 1.5 to 2 times of the strength of the concrete or the control crushing index value should be less than 8%.
The maximum particle size should not be greater than 25mm, and 10mm~20mm is better, because the probability of internal defects is reduced for stones with smaller particle sizes, the bonding area with the mortar increases, and the interface stress is more uniform. ” "In addition, high-performance concrete should also be mixed with high-quality active admixtures, the best fly ash and mineral powder, and even silica fume.
Of course, high-performance concrete is also inseparable from high-performance concrete admixtures, which is the key, at present, high-performance concrete began to be applied to the third generation of high-performance superplasticizer, it is a superplasticizer called polycarboxylic acid, which has the characteristics of higher water reduction rate, which can greatly reduce the unit water consumption of concrete and improve the physical properties of concrete. ”