Construction Precast Development

Concrete is a relatively special commodity with strong timeliness, which also limits its service radius.

Concrete sales are the source of quality control for concrete companies.

Ferrule Loop Insert

When signing a sales contract, in addition to specifying quality acceptance clauses such as unit price, quantity, payment method, engineering characteristics, and whether there are special quality requirements, it is also necessary to specify in detail the sampling method and curing system of the specimens, the operating procedures for concrete pouring, the curing method and curing period of the entity, etc.

Due to the limitation of the length of the concrete sales contract, the provisions of many quality terms are not very detailed, but it should be noted that the construction technology disclosure and maintenance plan requirements provided by the technical department of the concrete company (after being signed and confirmed by the construction technicians) have the same legal effect as this contract.

In addition, when encountering special requirements or special engineering parts, timely communication should be made with the technical department to fully assess quality risks.

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Cast in Loop

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Undoubtedly, admixtures have become a core component of concrete, and the iterative upgrading of their technology is a key driving force for the overall development of concrete technology.

In recent years, the additive industry has developed rapidly, and the product system has already broken through the traditional category boundaries, presenting a pattern of rich varieties and significant performance differentiation.

Rebar Wheel Spacers

Although the “Terminology for Admixtures” GB/T 8015-2017 has expanded the categories and definitions of admixtures, it is still difficult to keep up with the pace of market development and technological innovation.

Special admixtures such as reducing agents, enhancing agents, mortar, precast concrete, permeable concrete, and plant-based concrete are emerging one after another, accompanied by confusion in category naming and market chaos.

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In general, the size of cracks is measured based on their width.

Swift Lift Clutches

According to relevant standards and engineering practices such as the “Code for Design of Concrete Structures” (GB 50010), cracks can usually be classified into the following categories:.

In order to eliminate problems such as shrinkage and cracking of concrete during the solidification process, ultra long structures are generally equipped with expansion and contraction pouring strips.

However, seamless construction is adopted during the construction process for the convenience of construction or to meet the requirements of the project schedule.

Spread Anchor

The method of using expansion reinforcement tape is the most commonly adopted method for seamless construction.

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The difficulty in the construction of this project is the wind tunnel body engineering.

In order to achieve the finishing effect of plain concrete on the surface of the tunnel body, the bottom plate, side walls, and top plate of the wind tunnel need to be constructed by cast-in-place plain concrete.

The quality control level of fair faced concrete should not be lower than the requirements of “decorative fair faced concrete” in the “Technical Specification for Application of Fair faced Concrete” (JGJ169-2009).

Appearance quality requirements for plain concrete: no exposed reinforcement, honeycomb, voids, slag inclusion, or looseness are allowed; Uniform and smooth color; No rough surface, peeling or sanding, contamination, bubble diameter not exceeding 1mm; no repair marks, no flow or erosion marks.

Halfen Channel

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(1) Cement: Helin P · O42.

5 cement, with a 28 day cement strength of 49.

Rebar Bolsters

3MPa;.

As a commonly used material in construction engineering, concrete is one of them.

Early crack problems always pose challenges to construction quality and structural safety.

Precast Lifting Clutch

The formation of cracks is often closely related to factors such as hydration heat and shrinkage.

The introduction of admixtures has opened up an effective technical path for concrete crack control.

By reasonably screening and optimizing the types and ratios of admixtures, the crack resistance and durability of concrete can be significantly improved.

This article will study the role of admixtures in early crack control and their optimization schemes, analyze the effects of different types of admixtures on concrete performance, and then propose corresponding technical means.

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The quality of concrete construction will lead to quality defects or cracks in concrete engineering.

Analysis suggests that this is because the deformation of concrete raw materials (including cement stone and coarse and fine aggregates) is constrained, resulting in internal stresses greater than the tensile strength of the materials.

The quality of freshly mixed concrete mainly includes its setting time and workability.

Precast Round Ferrule

When analyzing the impact of concrete raw materials on concrete quality, several aspects can be explored, including aggregates, cementitious materials, additives, and mixing water.

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The composite antifreeze pumping agent currently used by concrete companies is generally composed of antifreeze, early strength, water reducing, and air entraining components.

Among them: (1) Antifreeze mainly lowers the freezing point of liquid phase in concrete; (2) The dosage of early strength agent increases the early strength of concrete, enabling it to reach or exceed the critical frost resistance strength of concrete as soon as possible.

Embedment Plate

(3) Water reducing agents can reduce the water consumption of concrete and minimize concrete frost damage.

(4) Air entraining agents can alleviate the stress damage caused by ice frost heave and improve the early frost damage resistance of concrete.

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