Precast News From China
This atlas is applicable to the design and construction of concrete floors in industrial and public buildings with requirements for wear resistance, dust prevention, and corrosion prevention.
It can also be used for the renovation of old concrete floors and the sealing and curing treatment and decoration of outdoor concrete floors.
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The concrete protective layer can significantly delay the tensile performance degradation of GFRP reinforcement at high temperatures, but it will lose its protective effect above 400 ℃; This article proposes a residual strength prediction model based on heat absorption parameters, providing a theoretical basis for the fire protection design of GFRP reinforced concrete structures.
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High performance concrete is widely used in key infrastructure projects due to its advantages such as low water cement ratio, high strength, and high density.
However, low water cement ratio systems are prone to significant self drying effects during the hydration process, leading to self shrinkage and early microcracks, reducing structural durability and limiting their engineering applications.
Super absorbent resin (SAP) is a three-dimensional network cross-linked polymer additive with strong water absorption, retention, and slow-release capabilities.
It can form a “micro reservoir” inside concrete and continuously replenish water and inhibit shrinkage through internal curing.
It is a new functional material that improves the crack resistance and durability of high-performance concrete.
This article summarizes the material properties, modification mechanism, impact on concrete performance, and future research directions of SAP based on domestic and foreign research results.
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The second phase of the National Commercial Concrete Enterprise Sales Special Practical Skills Training Course for June is currently recruiting students .
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The laboratory is not only the main department for controlling the quality of concrete, but also the core of technological development and development.
At the same time, it is also the window for the external image of the enterprise and the top priority for concrete enterprises.
Therefore, high-quality inspection tools can enable experimenters to obtain real data, have a clear understanding, save energy and reduce consumption for enterprises, and safeguard quality.
The standard test block obtained through standard trial molding is the only prerequisite for obtaining real and standard data.
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A certain project said, “The slump of freshly mixed concrete was lost in 10 minutes, causing dozens of cubic meters of concrete to be unable to be constructed.
Your admixture manufacturer should come and adjust it quickly, and you will be responsible for the economic losses caused!” After the accident, we immediately set off and arrived at the site to replace the raw materials of the concrete one by one using the elimination method, observe the working performance of the concrete, and ultimately lock the cause on the washed sand.
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If you also have these questions, this article will explain them to you in the simplest words.
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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.
Compared with the previous generation product, it has the following characteristics:.
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For columns, beams, walls, and slabs of the same concrete strength grade, the minimum number of extracted components should comply with the provisions in the table below and be evenly distributed;.
Try to avoid adding admixtures and water twice, which can cause significant differences in the bleeding rate of concrete in the same truck; Avoid water accumulation on the inner wall of the template, which can cause obvious water marks and color differences; Avoid excessive vibration, which can cause the slurry to float, bleed, and secrete.
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