②.
It should be inspected and accepted according to variety, strength, delivery date, production plant, etc.
, and stacked separately, first come, first use;.
precast-tech
precast technology developments
The bubbles on the surface of concrete are the most headache inducing problem
I have been working on construction sites for ten years and have led dozens of projects.
To be honest, the bubbles on the surface of concrete are the most headache inducing problem.
You followed the specifications for the mix proportion and did the vibration, but when you removed the mold, it was filled with numerous small holes – it couldn’t pass the inspection, the rectification was time-consuming and laborious, and it also affected the reputation of the project.
Many people’s first reaction is to blame the vibrator, but it’s actually not that simple.
Bubbles are never caused by a single factor, but rather by a combination of materials, proportions, processes, and management.
Today, I will explain the pitfalls I have stepped on and the experiences I have summarized over the past decade in one go.
I suggest that all engineers collect them.
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Forum Report Sharing – Overview of Precast Concrete Building Structure Technology (Tian Chunyu)
On March 21st, the 15th Precast Concrete Technology Forum kicked off at the Xicheng Campus of Beijing Jianzhu University.
The theme of the conference is “Green, Low Carbon, New Chapter of Digital Intelligence Spectrum”, aiming to review the 15 year development history of the precast concrete industry and jointly explore the innovative path of precast concrete technology.
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Concrete structure crack identification 1: crack detection method and description
The inspection and detection of cracks in concrete structural components generally include observation of the current status and propagation of cracks.
The current status of cracks should include the location, quantity, length, width, and depth of cracks, as well as the shape or direction of cracks; The expansion of cracks should include changes in the location, quantity, length, width, and depth of the cracks.
In addition, it also includes the time of crack occurrence and propagation; The exudate inside the crack, the dryness and humidity on the crack surface, and the weathering and peeling of materials around the crack.
The inspection and testing methods can be carried out according to the following regulations:.
What causes white frost on concrete?
On the outer surface of concrete, a white, soft substance resembling fluff is often produced, which is called alkali leaching.
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Three concrete companies have been filed for bankruptcy
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Any media, website, or individual who reposts or uses it must obtain written authorization from the account.
Violators will be held responsible by this website in accordance with the law.
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Cement and concrete usher in a new wave of price hikes!
The latest data shows that cement prices continued to rise in the first week of April, with a price increase range of 5-20 yuan/ton.
Salespeople have provided feedback that as we enter the second quarter, the domestic building materials industry chain is driven by cost and demand resonance, ushering in a comprehensive price increase cycle.
The high prices of coal and oil, as well as the rise in shipping costs, form rigid cost support.
Coupled with the concentrated resumption of construction projects in various regions, demand is recovering, and cement is the first to initiate a nationwide price increase.
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Did a concrete giant quietly make a lot of money last year?
In 2025, China’s cement production reached 1.
693 billion tons, a year-on-year decrease of 6.
9%.
Huaxin Building Materials achieved a sales volume of 61.
96 million tons of cement and clinker, a year-on-year increase of 2.
8%.
The gross profit margin of the cement business has significantly increased from 23.
75% in 2024 to 33.
57%, an increase of about 9.
82 percentage points, and has rebounded to the highest level since 2022.
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Global underwater concrete 3D printing technology breaks through multiple points, infrastructure enters a new stage of deep blue intelligent
Recently, research institutions and enterprises in countries such as the United States and Australia have successively released major achievements in underwater concrete 3D printing technology, covering deep-sea operation robots, non accelerating agent printing systems, and civilian scene landing projects.
The industry dynamics are exciting.
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Analysis of influencing factors and optimization strategies for concrete mix design
The principle of workability refers to the basic principle of uniform quality and compact formation of fresh concrete at each stage.
Its specific connotations include fluidity, cohesion, water retention, etc.
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