Month: May 2026

Concrete admixtures are the “technical soul” of modern concrete, and their adaptability to cementitious materials, aggregates, and mixing water not only determines the construction performance of concrete, but also directly affects its strength and durability.

Fixing Socket

On the front line of production and construction, through intuitive observation and comprehensive judgment of hand feel, various phenomena are interrelated and mutually confirmed, accurately identifying the good adaptability of additives.

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Concrete strength is the core indicator for measuring structural quality, and its development is closely related to curing conditions.

Standard curing and same condition curing are two commonly used methods in engineering, and the difference in strength of the obtained specimens directly affects the judgment of the actual bearing capacity of the structure.

Clarifying the patterns of these differences is not only the key to resolving disputes in strength assessment in engineering, but also provides direction for optimizing maintenance processes.

Previous studies have highlighted the impact of maintenance environment on strength.

Rebar Bolsters

Next, we will delve into the underlying mechanisms of strength changes under two maintenance methods and reveal the specific patterns of differences.

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Due to differences in desulfurization processes and coal quality among power plants, the composition of desulfurization ash is not fixed.

Therefore, using desulfurization ash may not necessarily slow down the setting of concrete.

Crown Foot Anchor

When the proportion of calcium sulfite in desulfurization ash is high, it will cause poor compatibility between cement and admixtures, decreased stability of concrete, increased drying shrinkage, and delayed setting of concrete, with a delay time exceeding 48 hours or even longer.

And the later strength of concrete may also decrease.

There is data indicating that when the content of calcium sulfite reaches 60%, desulfurization ash will reduce the 90 day strength of concrete by 10MPa.

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The author of this article is Wang Huaibei, published in “Construction Workers”.

During the construction process, there are safety hazards in the foundation engineering as long as it is not backfilled for a day.

Swift Lift Void Former

Both the construction unit and the supervision unit hope to complete the foundation engineering construction as soon as possible.

But we have found that many construction units start pouring concrete without completely draining the accumulated water in the foundation pit, especially when there is a concrete structure under the column pier.

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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.

Double Ended Ferrule

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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.

Lifting Socket

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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.

Cast In Plate

May I ask what is going on?.

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.

Pfeifer VS Box

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Lifting Anchor

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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.

Pfeifer VS Box

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