Construction Precast Development
Precast News From China
precast technology developments
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.
.
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.
.
·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).
.
1.
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.
.
On March 30th, the Wuhan Natural Resources and Urban Rural Development Bureau announced that after verification, 10 pre mixed concrete production enterprises had abnormal professional contracting qualifications and did not meet relevant qualification standards and management regulations.
.
Among the types of concrete cracks, structural cracks (such as penetrating settlement cracks, load cracks, and large volume hydration heat cracks) are the most dangerous, with a width often exceeding 0.
5 millimeters and a depth penetrating the component, directly threatening the structural bearing capacity and overall stability.
.
The common types of cracks in concrete pouring mainly include plastic shrinkage cracks, temperature cracks, drying shrinkage cracks, settlement cracks, hydration heat cracks, and stress concentration cracks, among which plastic shrinkage and temperature cracks are the most common in the early stages of construction.
.
In 2025, under the dual background of supply and demand structure adjustment and green transformation, the ready mixed concrete industry in Guizhou Province will focus on stabilizing growth, improving quality, and promoting transformation.
It will face core challenges such as overcapacity, low price competition, and financial pressure, steadily promote the standardized, green, and intelligent development of the industry, and provide solid building materials support for major infrastructure, urban renewal, rural revitalization, and livelihood projects in the province.
The report on the development of industries in the province in 2025, the effectiveness of work promotion, existing problems, and work suggestions for 2026 is as follows:.
The rebound instrument was invented by Swiss scientist Schmidt in 1950.
The rebound instrument has a relatively simple structure and is small in size and light in weight, which makes it convenient to carry and has a fast testing speed.
This equipment received attention from relevant personnel in China in the 1950s, and it was not until the 1980s that this method began to be widely used for testing the strengthening of concrete.
During the experimental process, relevant theories were continuously summarized and its related content was improved.
.
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:.