Month: August 2026

Notice on Holding the 7th Concrete Pipe Culvert Production Application Technology Innovation Forum (Second Round)

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In order to fully implement the overall requirements of the country on the upgrading and renovation of urban pipeline networks, urban renewal, and the construction of urban infrastructure lifeline safety projects, promote the intelligent, green, and integrated development of the manufacturing industry, assist in the construction of underground pipeline networks in cities during the 15th Five Year Plan period, and promote the deep integration of scientific and technological innovation and industrial innovation, the Cement Concrete Pipe Culvert Branch of the China Concrete and Cement Products Association and the Quality Innovation Working Committee of the Prestressed Steel Tube Concrete Pipe of the China Concrete and Cement Products Association will jointly hold the 7th Concrete Pipe Culvert Production and Application Technology Innovation Forum during the 2026 Concrete and Cement Products Industry Conference and the 2026 China International Concrete Expo.

Cast In Plate

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Reference sharing 206: Prediction of shear strength of fiber-reinforced concrete beam column joints based on machine learning

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This issue shares the paper “Machine learning based prediction of joint sheet strength for fiber reinforced concrete beam column connections” published in the international journal Composite Structures in 2026.

Spherical Head Anchor

A FRC beam column joint test database containing 220 specimens was constructed, and the predictive performance of 10 machine learning algorithms was systematically compared.

The SHAP method was used to analyze the parameter influence mechanism, and a visual GUI prediction tool was developed, providing a data-driven new method for seismic design of fiber-reinforced concrete structures.

This article is only for academic exchange, and the copyright belongs to the original author and publisher.

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Major engineering misconceptions! Foamed concrete impersonates lightweight aggregate concrete, and 90% of construction sites use it

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At present, there is a fatal chaos in the industry: drawings, changes, and lists clearly require the use of lightweight aggregate concrete, but foam concrete is secretly used as a substitute on site.

Construction workers, and even some technical management personnel, blindly replace materials based solely on the superficial perception that they are all lightweight, porous, and capable of weight reduction.

Little do they know that the raw materials, internal structure, strength grade, stress performance, and applicable standards of the two materials are completely different.

This behavior of material substitution is not simply a material deviation, but a typical example of engineering cutting corners and structural hidden danger construction.

PVC Chamfer

In the later stage, quality accidents such as floor cracking, overall settlement, waterproof layer tearing, and roof load failure are prone to occur, and the acceptance stage is judged as unqualified 100%.

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Study on the Influence of Mechanism Sand and Stone Powder Content and MB Value on Concrete Performance

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With the continuous expansion of infrastructure, the demand for raw materials for concrete is also increasing.

As one of the six major components of concrete, fine aggregate is in short supply.

However, in recent years, due to the scarcity of natural sand resources and environmental restrictions, its usage cost has become increasingly expensive.

Therefore, machine-made sand has been widely used, especially in Chongqing, where limestone resources are abundant.

Almost all commercial concrete mixing plants in the region are using machine-made sand for concrete production.

Mechanized sand is produced through mechanical crushing, with a controllable production process and minimal environmental pollution, while also protecting natural resources.

However, the quality of mechanism sand has many influencing factors on the production quality of concrete, such as fineness modulus, stone powder content, MB value, etc.

In the technical management process of commercial concrete mixing plants, it was found that the stone powder content and MB value fluctuated greatly, which had a significant impact on production quality control.

Magnetic Thread Disc

Therefore, it is necessary to study the influence of sand and gravel powder content and MB value on the performance of concrete.

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Standardized management measures for the entire process of concrete test blocks in high-speed rail projects

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In order to strengthen the management of the entire process of concrete test blocks in high-speed railway projects, ensure the authenticity, representativeness, and traceability of concrete test block strength testing data, and in accordance with the “Railway Concrete Strength Inspection and Evaluation Standards” (TB 10425-2019), “High speed Railway Concrete Engineering Construction Quality Acceptance Standards” (TB 10752), “Railway Engineering Concrete Solid Quality Testing Technical Regulations” (TB 10433-2023), and the “Railway Construction Project Test and Testing Management Measures” (Tiejian [2023] No.

Double Ended Ferrule

146) of China Railway Group, this management measure is formulated.

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Concrete crack prevention and control, full process control before, during, and after the event

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Concrete cracks are the most common quality problem and a major area of complaints from property owners.

Cracks not only affect aesthetics, but can also seriously affect structural safety and durability.

The treatment of cracks cannot be repaired afterwards, and efforts should be made throughout the entire process of pre control, in-process control, and post disposal.

Lifting Anchor

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