Month: January 2026

When pouring concrete for side walls and columns, the concrete should be layered, and the thickness of each layer should not exceed 400mm.

The concrete for beams and slabs should be poured simultaneously, starting from one end and advancing forward.

Pfeifer VS Box

The area should be minimized as much as possible during concrete pouring.

Attention should be paid to compacting the bottom and sides of the beam, and the vibrator should not directly touch the steel bars or embedded parts.

The virtual laying thickness of the concrete slab should be slightly greater than the thickness of the slab.

After vibration, it should be smoothed with a wooden trowel and then covered with plastic film.

The insulation layer should be promptly laid on top of it.

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Entering the harsh winter, many projects are facing the challenge of low temperatures.

Concrete, as the “flesh and blood” of architecture, particularly requires scientific care during winter construction.

Today, we will unveil the key points of winter concrete construction.

Precast Lifting Clutch

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When a structure is subjected to dynamic loads (such as vibration, impact, earthquake), due to the fast speed of the load, the structure will generate inertial forces, resulting in internal forces, deformations, and other responses greater than the effect of static loads of the same magnitude.

The dynamic coefficient is a factor that amplifies the static load when converting the dynamic load value into an equivalent static load value for calculation.

It reflects the ratio of the response of the structure under dynamic action to the response under static action.

Spherical Head Anchor

Article 5.

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1 of the Load Code for the Design of Building Structures GB50009-2012: For the dynamic calculation of building structure design, when there is sufficient basis, the self weight of heavy objects or equipment can be multiplied by the dynamic coefficient and designed according to the static calculation method.

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Concrete test blocks are a key physical carrier and quantitative basis for controlling quality, verifying performance, and evaluating safety during the construction process.

Their standardized retention, curing, and inspection constitute a technical closed loop for quality control throughout the entire chain from raw materials, mixtures, to physical structures.

In order to eliminate misjudgments and risks caused by improper management of test blocks and ensure that various testing data can truly and reliably reflect the quality of engineering entities, the mandatory requirements and core principles in national standards are extracted and integrated, and this standardized implementation guide is formulated.

Spread Anchor

Through systematic diagrams and key points, this guide aims to provide a clear, accurate, and quickly accessible on-site operation basis for project technical, quality, and construction management personnel, so as to effectively transform the normative provisions into ensuring the safety and reliability of engineering structures.

Effective practice of durability.

Core tip: The early shrinkage and drying shrinkage of concrete gradually decrease with the increase of fly ash content, and the inhibitory effect of fly ash on early shrinkage is better than that of drying shrinkage; With the increase of mineral powder content, the early shrinkage of concrete increases while the drying shrinkage decreases; The addition of silica fume increases the early shrinkage and drying shrinkage of concrete, and this effect becomes more pronounced with the increase of silica fume content.

Double Ended Ferrule

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The setting time is divided into initial setting time and final setting time.

The initial setting time is the time required from the mixing of cement and water until the cement slurry begins to lose its plasticity.

The final setting time is the time required from the mixing of cement and water until the cement slurry completely loses its plasticity and begins to develop strength.

The setting time of cement is of great significance in construction.

The initial setting time should not be too short, and the final setting time should not be too long.

Crown Foot Anchor

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With the development of society, high-strength and large volume concrete is widely used in the foundation slabs and bridge structures of super high-rise buildings.

High strength and large volume concrete not only needs to meet strength standards, but also needs to consider controlling the temperature difference between the inside and outside of the concrete, reducing hydration heat, and preventing concrete cracking caused by excessive temperature differences.

Magnetic Thread Disc

High strength and large volume concrete, especially concrete with a strength exceeding C50, has a high frequency of cracking problems.

Therefore, solving the problem of concrete cracking is currently the focus of crack resistance research.

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With the development of urban construction, commercial concrete has gradually replaced on-site self mixed concrete in construction projects.

The application of commercial concrete in engineering greatly improves the quality assurance rate of engineering entities, but at the same time, it also gives rise to some problems.

Due to the requirements of urban planning and the limitations of raw material transportation conditions, concrete mixing plants are basically distributed in suburban areas far away from urban areas.

Commercial concrete is transported from the mixing plant to the construction site, and the transportation distance is generally long.

In addition, some accidental factors such as urban traffic conditions, concrete site waiting, and mechanical failures often require several hours for concrete to be mixed with water and poured.

Metal Rebar Caps

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In addition to the specific provisions of the regulations, the winter construction period is divided into three stages to facilitate the management of concrete engineering construction from November 15th to March 15th each year.

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Different technical adjustment plans are formulated according to different temperatures.

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