Precast News From China
All steel pipe columns in this project have an outer diameter between 1200mm and 1800mm, which is a prerequisite for manual vibration.
Taking the 1200mm diameter as an example, the specific internal situation of the steel pipe is described as follows:.
2025 is an extraordinary year, as the impact of external environmental changes deepens and the contradiction between strong domestic supply and weak demand becomes prominent.
The country vigorously promotes the development of new quality productive forces according to local conditions, strengthens scientific and technological innovation, cultivates and strengthens emerging industries, and transforms and enhances traditional industries, achieving positive results.
The ready mixed concrete industry is constrained by the downward trend of fixed assets investment in traditional infrastructure, real estate and construction industries.
In 2025, fixed assets investment will decline by 3.
8% year on year, of which, the investment in infrastructure will decline year on year, and the decline in real estate investment will intensify; By 2025, the cumulative production of ready mixed concrete in China will be 2.
288 billion cubic meters, a year-on-year decrease of 8.
7%.
The production of ready mixed concrete has been declining year-on-year for four consecutive years, further clarifying the trend of industry demand shifting from the platform period to the downward period.
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Crack repair agent is a new type of inorganic solvent material that can undergo chemical reactions with cement powder and mineral powder (quartz sand).
Then it forms a material with excellent adhesion and elasticity, mainly used for repairing cracks and improving surface quality.
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The quality control of concrete raw materials is the cornerstone of ensuring the performance and durability of concrete structures, among which the quality control of sand and gravel materials is particularly critical and also the key and difficult point in practical engineering.
The reason is that:.
SR-3 pre mixed concrete segregation regulator is an upgraded product of pre mixed concrete segregation regulator and concrete anti segregation agent.
Compared with the previous generation product, it has the following characteristics:.
The application of commercial concrete has been basically popularized in China, and the use of admixtures has also promoted and accelerated the development of concrete technology.
Admixtures have also solved various technical problems in the application of concrete, such as long-distance and ultra-high transportation of concrete, self compacting of concrete, and crack control of super large concrete structures.
Admixtures have been widely used in ultra-high strength and underwater non dispersing concrete.
Due to the uneven distribution of concrete material resources in our country and the limitation of green environmental protection, some regions are facing a shortage of sand and gravel aggregate resources.
As a result, many areas have to switch to using ultra-fine sand, machine-made sand, and discontinuous graded aggregates, which leads to the failure of commercial concrete to achieve the expected technical effects after the use of additives and a decrease in concrete quality.
In addition, some technical personnel in concrete production enterprises have certain misconceptions about concrete admixtures, and their improper application leads to frequent problems and even engineering accidents after using admixtures.
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According to the consensus reached at the work meeting of the regional alliance leader units in the ready mixed concrete industry in 2026, a reminder letter on further strengthening industry self-discipline to curb the current chaos in the concrete industry is now issued.
All units are requested to carefully organize learning and implement it in combination with their actual situation.
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When it comes to concrete, our inherent impression is always “hard, cold, and brittle” – it is an unshakable hard block in the wall, a broken curb on the roadside, and an irreparable building hazard once cracks appear.
As the “pillar” of the construction industry, it can withstand thousands of tons of pressure, but cannot withstand even a slight bending and stretching.
The brittleness of “breaking at the first crack” has always been the fatal weakness of traditional concrete.
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·Policy: Starting from January 1, 2026, general taxpayers selling self-produced concrete will be exempt from 3% simple taxation and will be uniformly taxed at 13% general taxation (Caishui Announcement No.
10, 2026).
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1 The problem of residual flocculants in water washed mechanism sand leads to significant loss of slump over time and high dosage of water reducing agents in mechanism sand concrete.
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