precast-tech

Concrete, as one of the most widely used materials in construction engineering, its durability directly determines the service life and safety performance of buildings.

Precast Lifting Clutch

Among the many factors that affect the durability of concrete, Alkali Aggregate Reaction (AAR) is a highly concealed and harmful internal destructive effect, known as the “cancer” of concrete in the industry.

A deep understanding of its reaction principle and its impact on durability is the key to preventing and controlling such diseases.

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As a hydraulic construction technician, do you also feel a headache about controlling the concrete protective layer? If the protective layer is left too large, it may cause the concrete to have no reinforcement and be prone to cracks.

Magnetic Thread Disc

If the protective layer is too small, it may cause the steel bars to develop and even expose, seriously affecting the appearance quality of the concrete.

In severe cases, it may even need to be dismantled and rebuilt, resulting in heavy losses.

The author summarizes some control measures for tunnel lining protection layer for your reference.

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SR-3 pre mixed concrete segregation regulator is an upgraded product of pre mixed concrete segregation regulator and concrete anti segregation agent.

Halfen Channel

Compared with the previous generation product, it has the following characteristics:.

Concrete structures often suffer from various diseases in the early stages of use due to factors such as materials, construction, and environment.

If not treated in a timely manner, it will accelerate structural aging and shorten the service life.

Metal Rebar Caps

The specific manifestations and core features are as follows:.

Foaming agent is the core raw material for the preparation of foam concrete, and its performance directly determines the quantity, structure and final quality of foam concrete.

Magnetic Thread Disc

According to the source of raw materials and preparation process, the commonly used foaming agents for foam concrete can be divided into three categories: rosin gum foam agent, waste animal hair foam agent and other types of foam agent.

There are significant differences in the chemical composition, performance characteristics and application scenarios of various foaming agents.

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In construction engineering, the quality of pre mixed concrete is directly related to structural safety and engineering durability.

Fixing Socket

As an engineering manager, have you established a complete quality control system? This article will provide you with a complete checklist for quality control of ready mixed concrete, helping you identify and fill in any gaps.

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Chemical grouting for leak sealing is generally used for areas with severe water leakage.

The cracks in these areas are usually continuous and difficult to seal.

Therefore, chemical grouting is required for leak sealing.

When sealing, the location of the leaking cracks should be determined, and the treatment methods should be studied before determining the leak sealing plan.

Double Ended Ferrule

The treatment methods for this type of crack leakage are as follows:.

In the pursuit of high-strength and long-life concrete, scientists have found that cement alone is not enough.

Cast In Plate

So, fly ash and mineral powder, two types of “industrial waste”, transformed into “concrete reinforcement agents”.

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Contact information: North Building, China Academy of Building Materials Science, No.

Plastic Nail Plate

1 Guanzhuang Dongli Jia, Chaoyang District, Beijing.

Abstract: Based on the finite difference method, the temperature field of large volume concrete in a raft foundation project of a nuclear power plant was calculated; And based on this, crack resistance calculation was carried out for the large volume concrete of this project through temperature stress calculation; Finally, preliminary discussions were conducted on temperature control measures for large volume concrete in conjunction with this project.

Swift Lift Clutches

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