Fine aggregate concrete and ordinary concrete, literally speaking, are easily misled by the word “fine aggregate”, but in fact, this concept is exactly the opposite.
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precast-tech
precast technology developments
The TOP magazine in Zone 1 has exploded! Concrete materials break through the century old bottleneck! The research on engineering durability
With the rapid development of artificial intelligence technology, machine learning is gradually becoming an important tool for concrete material design and performance prediction.
Traditional concrete research mainly relies on empirical formulas, experimental mixing, and engineering experience.
However, concrete is a typical multi-component, multi-scale, strongly nonlinear material, and its performance is influenced by various factors such as cement, fly ash, slag, water, aggregates, additives, age, curing conditions, and fiber or nanomaterial content.
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Why are the “test” and “bounce” results different for the same concrete?
Question: For C55 concrete, all test block inspection reports are qualified, but for the structure inspection with a rebound tester, we took 12 sets of data and found that the strength is only around C45.
Moreover, the carbonation depth is calculated as zero.
The concrete pouring has been completed for more than two months.
May I ask what is going on?.
How to adjust concrete in summer?
Generally, for every 10 ℃ increase in concrete temperature, the water consumption of concrete increases by 3% to 5%, the air content decreases by 20% to 30%, the setting time is shortened by 1 to 3 hours, and the strength decreases by 2 MPa.
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The maximum registered capital is 50 million yuan! 10 concrete companies established
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Experience in the Application and Quality Control of Pre mixed Concrete Raw Materials
Everyone knows that the mix proportion of ready mixed concrete is the primary issue in concrete quality control.
In addition to being a key link in delivering products that meet customer requirements, it is also the basic basis for determining whether the product is economically reasonable.
To ensure the production quality of ready mixed concrete, reasonable and economical concrete mix design is based on the foundation of raw materials.
So concrete raw materials are the foundation for achieving product quality and reflecting economic benefits, and controlling concrete raw materials is particularly important.
But we believe that it is more important to understand the essence of concrete raw materials, as the vicious competition between pre mixed concrete companies and concrete material suppliers has led to a mixed market of concrete raw materials.
Therefore, recognizing the essence of raw materials and the “material based construction method” is of utmost importance for concrete quality control.
Based on my years of experience in the concrete industry, I would like to briefly discuss and share my insights and responses to the application of concrete raw materials with my peers.
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Mechanism and prevention technology of frost heave disease on concrete pavement
Frost heave is an important form of damage to cement concrete pavements in cold regions of airports, which deteriorates performance, shortens service life, and poses a serious threat to flight safety.
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What are the main reasons for poor pumping performance of concrete
Poor pumpability usually refers to poor fluidity and high resistance of concrete during pumping, which can easily lead to problems such as pipe blockage and segregation.
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Summary of Concrete Industry Standards and Specifications – Aggregate Section Free Download
The commonly used technical standard system in concrete enterprises covers the entire process of raw materials, mix design, production control, construction application, and quality acceptance, and is the core basis for ensuring product quality and engineering safety.
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How to construct lightweight aggregate concrete?
The construction process of lightweight aggregate concrete is basically the same as that of ordinary concrete.
However, due to the low bulk density, porous structure, and high water absorption rate of lightweight aggregates, the formulated lightweight aggregate concrete also has certain characteristics.
Only by paying sufficient attention during the construction process can the construction quality of the project be ensured.
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