Construction Precast Development
Precast News From China
The internal exchange journal materials on local engineering cost, judicial appraisal, engineering law, and engineering audit in Yunnan Province are mainly written by technical personnel with many years of frontline work experience.
They are all summaries of practical work experience, and most of the attached cases are actual engineering cases that have occurred locally, which have good reference value.
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We warmly welcome you.
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Beijing Fengzhu Engineering Technology Research Institute Co.
, Ltd.
(hereinafter referred to as “Fengzhu Research Institute”) was established in 2017 and is a technology enterprise specializing in research and practice of civil engineering and earthquake prevention and disaster reduction technology.
The core team of Fengzhu Research Institute is led by Comrade Yao Panfeng, with members possessing rich engineering practice experience and research foundation.
They have participated in the construction of major projects such as Tianjin 117 Building and China Zun (Director of Structural Design), creating comprehensive benefits of over 800 million yuan and leading the world in some fields, with 6 world or domestic records.
As of 2025, the company (including Comrade Yao Panfeng’s patent) has obtained over a hundred patent authorizations, including more than 40 invention patents.
Fengzhu Research Institute has established cooperative relationships with several top domestic research, design, and construction units, and has strong influence in this field (see Introduction of Beijing Fengzhu Engineering Technology Research Institute Co.
, Ltd.
).
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(2) Test personnel should strictly comply with national, industry, and local testing standards, as well as relevant specifications, regulations, technical documents, etc.
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The study prepared HC samples with different mix ratios (1:3:6, 1:2:4, 1:1.
5:3), water cement ratios (0.
4-0.
6), and CRM substitution rates (0%, 15%, 25%) using 162 cylindrical specimens (diameter 150mm, height 300mm).
Horizontal and vertical cutting surface images were collected, and statistical features were extracted to train SVM, BRE, and GPR models.
The overall process is shown in Figure 1.
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More and more people are building houses in rural areas, and with them, there are not too many knowledgeable people.
So the problem is, how can those who don’t understand learn? As we all know, concrete is the most common building material.
However, in rural housing construction, due to the relatively small amount of construction, most of it is self mixed concrete, which can be mixed as much as needed and used on-site without waste.
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Today, we will systematically review common concrete defects and provide you with a practical “Diagnosis and Prevention Manual” from three dimensions: causes, detection, and prevention.
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Today, Swordsman will share with you an electronic PDF version of the “Test Method Standard for Long term Performance and Durability of Concrete” (GBT50082-2024).
For us designers, electronic tools are very convenient and fast.
Let’s take a look together~.
Concrete cracks are physical structural changes caused by internal and external factors in concrete structures, and cracks are the main reason for the decrease in the load-bearing capacity, durability, and waterproofing of concrete structures.
Only by correctly identifying the causes of concrete cracks, taking corresponding measures, and eliminating hidden dangers can we ensure structural safety and normal use.
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Hardened slag concrete may exhibit mottled green or blue-green areas on the surface in the first few days after pouring.
This brief appearance is commonly referred to as the “blue-green hue” of concrete.
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1) The steel-concrete composite structure has a large number of internal steel bars with large specifications, and the bolts on the steel frame are dense.
The processing of stirrups and hooks is complex, and the binding is inconvenient;.