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(2) A certain project used shaft kiln cement from a certain cement plant and high-efficiency composite water reducer from a certain admixture plant, which initially had good effects.

Later, a batch of concrete mixed with the same admixture experienced rapid setting, resulting in a loose concrete structure.

Finally, all 800m3 of concrete that had already been poured had to be smashed off.

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Upon investigation, it was found that the cement passed the cement standard inspection and the water reducing agent also passed the inspection.

However, the concrete produced by combining the two had serious quality issues.

In order to investigate the cause, researchers conducted experiments using the cement and water reducing agent involved in the accident, and found that there was indeed a rapid setting phenomenon.

However, by adding 0.

5% to 1.

0% (dihydrate gypsum) to the cement, concrete with good workability and strength was obtained.

This proves that the cement is incompatible with the water reducing agent due to insufficient gypsum content (but meets the cement standard performance).

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As the core material of modern construction engineering, the quality of concrete directly affects the safety and durability of the engineering structure.

With the continuous development of the construction industry, concrete quality control is facing new challenges and opportunities.

Fixing Socket

This article combines the latest industry data in 2025 with regulatory practices in various regions to analyze the current problems in concrete quality control and propose systematic solutions.

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When racking one’s brain but still unable to establish more independent equations, can one change their mindset and adopt a step-by-step approach to solve or improve by reducing the number of unknowns? Based on our over ten years of usage experience, it is completely feasible.

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Article 8.

1.

4 of the “Code for Construction of Concrete Structures” (GB 50666-2011) states that adding water during transportation, conveying, and pouring of concrete can seriously affect its quality.

Shuttering Magnet

This article attempts to analyze the issues of water addition and control during the concrete pouring process, and discuss and learn from peers and experts.

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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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(1) When the pile leaves the factory, the manufacturer should provide a product quality certificate, and its specifications, batch number, and production date should comply with the corresponding acceptance batch number content.

Plastic Nail Plate

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In construction and road and bridge construction, there are various types of concrete, and there are three common types based on their use, performance, and raw materials: 1.

Cement concrete: mixed with cement, sand, stones, and water, which is the most commonly used in road and bridge construction; 2.

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Asphalt concrete: using asphalt instead of cement, with good flexibility, mainly used for paving roads, such as bridge decks and highway surface layers; 3.

Polymer concrete: This type of concrete is made by adding polymer materials, which have high strength and corrosion resistance, and is used in special projects such as chemical plants or repair projects.

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The supervisor needs to control the entry and acceptance of concrete raw materials from six aspects.

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The loss of concrete slump is inevitable, and it is important to minimize the loss value and speed to facilitate smooth construction.

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In the field of concrete repair and high-performance materials, we have been searching for solutions that can break conventions and fundamentally solve problems.

Crown Foot Anchor

After ammonium persulfate, its “sibling” – sodium persulfate, is becoming a highly anticipated new star in this field due to its unique solubility and oxidation efficiency.

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