Construction Precast Development
Precast News From China
Ruida Heng Research Institute focuses on industry research reports in the engineering field, as well as research and interpretation of real-time industry trends and national industrial policies, providing professional third-party perspectives and accurate market analysis for engineering industry clients.
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According to the Notice on the Revision of the Shaanxi Province Engineering Cost Information Material Information Price Catalog issued by the Shaanxi Provincial Construction Engineering Cost Service Center, starting from February 2025, the information price of ready mixed concrete will be re included in the Shaanxi Engineering Cost Information and published in the form of a special report.
The information price released in this issue is for ordinary concrete, without considering factors such as special requirements for cement, sand and gravel, and other additives in special and key projects; The prices released have experienced significant fluctuations due to changes in the collection channels, calculation methods, etc.
, indicating that the fluctuation in the price of ready mixed concrete information in this period is not caused by market changes.
All concrete supply and demand enterprises are requested to be aware of the situation and negotiate and communicate price matters.
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Concrete, in our impression, is incredibly strong, but it may be quietly gnawed on by microorganisms that are invisible to the naked eye.
This process begins in a sewage environment: at the bottom of the oxygen deficient pipeline, sulfate reducing bacteria convert sulfides into hydrogen sulfide gas with a foul egg odor.
When these gases enter the aerobic space at the top of the pipeline, sulfur oxidizing bacteria begin to work, oxidizing hydrogen sulfide into highly corrosive bio sulfuric acid.
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Since entering the fourth quarter, the company has been striving to be the first, and each station has achieved breakthroughs in the field of special concrete applications.
Recently, the C30 steel fiber reinforced concrete at Hanxin Station was successfully pumped over long distances; The self compacting concrete technology for stone stacking at Hengkun Station has been successfully implemented in major water conservancy projects, and both achievements have won the trust of customers with excellent performance, injecting strong power into the construction of core projects and laying a solid technical foundation for the company to strive for annual goals and tasks.
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Today I studied the ‘Technical Specification for Concrete Structures of High rise Buildings’ and shared several knowledge points with everyone.
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In response to the national requirements for NOx emissions, China’s coal-fired power plants have basically completed denitrification transformation.
At present, coal-fired power plants usually choose three combination technologies for denitrification: low nitrogen combustion+selective catalytic reduction (SCR), low nitrogen combustion+selective non catalytic reduction (SNCR), and low nitrogen combustion+SCR+SNCR.
After combustion, denitrification is mainly achieved by reducing NOx in the flue gas to N2 to achieve emission control.
SCR denitrification occupies an absolute proportion in the denitrification market of thermal power plants, with the largest market share and a much higher market share than other denitrification technologies.
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Modern concrete is a multi aggregate composed of cement, mineral admixtures, sand, stone, air, water, and additives, and can meet the basic requirements of “high workability, high early strength enhancement, and high durability”.
Modern concrete should include high-performance concrete, high-strength concrete, fluid concrete, pumped concrete, self leveling and self compacting concrete, anti-seepage and crack resistant concrete, underwater pouring concrete, and commercial concrete.
The traditional concrete mix design method based on strength cannot meet the requirements of modern concrete mix design.
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Against the backdrop of accelerated urbanization and booming infrastructure construction, concrete has become the undisputed “cornerstone material” in the field of architecture due to its excellent performance.
As a key component of concrete, sand and gravel aggregates account for up to 60% to 80% of the concrete, deeply participating in the shaping process of various properties of concrete.
They play an irreplaceable role in enhancing concrete strength, improving durability, and adjusting workability.
However, with the rapid development of the construction industry, the supply of sand and gravel aggregates is facing severe challenges.
Natural sand resources are gradually depleted due to long-term exploitation, and reserves are decreasing day by day; Although machine-made sand has become an important substitute, its production is affected by various factors such as raw material quality, processing equipment, and process parameters.
The quality of machine-made sand varies significantly from different origins and batches, making it difficult to ensure the stability of aggregate quality.
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