precast-tech

The residual amount of the original coarse ash sieve is relatively large, containing a lot of impurities and a large loss on ignition, so the actual effect cannot be well reflected.

In view of this, the concrete made from it does not have ideal fluidity, and its water retention and cohesion do not meet the requirements, which will have a great impact on the quality of fresh concrete; Due to excessive water demand, the actual water consumption per unit volume of concrete may exceed the expected water consumption, resulting in an increase in water cement ratio, a decrease in compressive strength grade, and a serious weakening of the durability of hardened concrete.

Edge Lift Anchor

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Concrete strength is the core safety indicator of building structures, and the precision of testing is of great significance for controlling engineering quality.

Rebound testing technology is easy to operate and non-destructive.

It is widely used in building engineering principles, mechanisms, practical operations, adaptation of different components, and error control.

Embedment Plate

Each link affects the reliability of testing results.

Exploring technical details, optimizing application strategies, analyzing and controlling errors can provide technical support for quality assessment of construction projects, and connect key theoretical and practical aspects.

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At present, in the construction process of major construction projects in China, there are different factors that affect the production of concrete test blocks.

The key issues include the size and external shape of the test blocks not meeting the requirements, excessive use of waste engine oil in the isolation agent, and excess concrete materials, which need to be highly valued by relevant work units.

Magnetic Thread Disc

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Are you afraid of freezing when pouring concrete in winter? The answer is affirmative.

Low temperature can cause water to freeze and expand in concrete, damaging its internal structure and reducing its strength and durability.

Steel Chamfer

At the same time, low temperature will slow down the hydration reaction of cement, and even stop the reaction, affecting the strength of concrete.

Do you know how to prevent concrete from freezing in low temperature environments?.

In the secondary pressing process, it is now common to manually press with a spatula, which not only has low efficiency but also lacks sufficient force.

Steel Rebar Chairs

When defects develop deeper from the surface to the inside, it will be difficult to eliminate them.

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Wang Chunlin, Zeng Bin Research progress on precast prestressed concrete structures [J].

Cast in Loop

Journal of Building Structures, 2025, 46 (08): 79-96.

In the 2026 “Friends of Time” New Year’s Eve speech, Luo Zhenyu gave a refreshing definition: concrete is actually “fresh”.

Erection Anchor

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Recently, the Jiangsu Provincial Department of Housing and Urban Rural Development issued a notice on strengthening the supervision of concrete quality in housing and municipal engineering, which will be implemented from the date of issuance.

Edge Lift Anchor

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Abstract: The performance of cement has a significant impact on the quality and properties of concrete.

This article studies the influence of cement on the performance of concrete and proposes some basic requirements for cement during concrete construction.

Precast Lifting Clutch

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When the concrete strength of columns and walls is two or more grades higher than that of beams and slabs during the construction process, separation measures should be taken in the boundary area.

Both the construction and supervision units recognize this situation, and the construction unit generally takes the following measures to intercept it.

Halfen Channel

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