precast-tech

The main processes include: measurement and setting out, steel bar correction, hoisting of the next floor staircase, construction of vertical precast components, sealing construction, grouting construction, binding of internal shear wall steel bars, installation of internal wall formwork, binding of external wall connection node steel bars, installation of external wall formwork, installation or lifting of protective frames, installation of horizontal formwork and supports, hoisting of horizontal composite (beam) slabs, hoisting of balconies and air conditioning panels, installation of water and electricity pipelines, binding of horizontal steel bars, and concrete pouring.

The key construction processes of precast shear wall structures include: surveying and setting out, vertical precast component construction, sealing construction, grouting construction, installation of exterior wall formwork, installation of horizontal formwork and supports, lifting of horizontal composite (beam) slabs, binding of horizontal steel bars, and pouring of concrete.

The construction plan for the precast standard layer is detailed in Attachment 1.

The specific project schedule and process arrangement need to be adjusted based on the type and quantity of precast components.

Spread Anchor

The logical relationship between the 17 main sub processes is as follows:.

Float slurry is the result of mortar floating and coarse aggregate significantly sinking during the pouring process of concrete, leading to segregation and often accompanied by bleeding.

The presence of float slurry can to some extent reduce the surface strength, appearance quality, and durability of concrete, which urgently needs attention and attention in engineering.

Shuttering Magnet

.

The author created this official account to share the collected specifications with everyone.

Swift Lift Void Former

In order to facilitate everyone to find the resources they want more quickly in their daily study and work, all materials are for learning purposes only, not for commercial purposes.

If there is any infringement issue, please contact me for deletion.

.

A certain project is a construction general contracting project, with B1 and B2 towers on the 27th to 30th floors.

The design adopts a cantilevered cast-in-place concrete structure belt, with a maximum cantilever length of 6m.

Lifting Anchor

There are also 20 standard floors above it.

Due to the fact that the cantilever concrete structure must be constructed together with the corresponding floor cast-in-place structure, the climbing frame needs to stop climbing when the structure is constructed to this point.

The cantilever frame is erected at high altitude for the structural construction of the cantilever part.

After the construction is completed, a second assembly and installation of the climbing frame are required for the upper structure construction.

The process is complex and has a great impact on the construction period.

Moreover, the installation and dismantling of the formwork system at high altitude is difficult and poses extremely high safety risks.

The construction period and labor costs are high.

Therefore, based on factors such as project duration, safety, and cost, changes must be implemented.

.

The “2025 Development Report on China’s Concrete and Cement Products Industry (White Paper)” has been compiled and printed.

This report is led by the China Concrete and Cement Products Association, jointly compiled by nearly 20 association branches and key leading enterprises.

Ferrule Loop Insert

It is the first systematic white paper in China’s concrete and cement products industry that focuses on the entire industry chain.

.

The widespread use of concrete chemical additives and mineral admixtures has supported the rapid development of modern concrete production and construction technology.

In the past 20 years, various new types of concrete such as high flow concrete, high-strength and high-performance concrete above C80, self compacting vibration free concrete, fiber reinforced concrete, underwater non dispersing concrete and other special concrete have been successfully developed and applied in many engineering constructions.

Lifting Anchor

.

Can core sampling be used for correction or strength measurement when the thickness of concrete components is less than 70? The article describes the method of using small aspect ratio core samples to test the compressive strength of thin-walled concrete components.

This method is a local standard and has recently been abolished.

Cast in Loop

So, what method should be used to test the compressive strength of concrete for thin-walled plate components?.

The phenomenon of cement concrete pavement being frozen usually occurs on roads with average frost resistance and poor frost resistance.

Once these roads encounter sudden cooling, snowfall, and freezing weather, they are prone to frost damage on the road surface.

Magnetic Thread Disc

But if we take effective anti freezing maintenance measures for these road surfaces with poor anti freezing ability in a timely manner, it can effectively improve the anti freezing ability of the road surface.

.

Concrete is the backbone of global infrastructure, but its traditional formula is no longer able to meet modern engineering needs in terms of durability, sustainability, and adaptability.

Lifting Socket

According to statistics, the construction industry contributes about 38% of global carbon dioxide emissions, with cement production accounting for 8%.

In this context, new concrete materials such as high-performance concrete (HPC), ultra-high performance concrete (UHPC), self compacting concrete (SCC), fiber-reinforced concrete (FRC), geopolymer concrete (GPC), and 3D printed concrete have emerged.

.

Due to the gradual depletion of river sand resources and the obvious cost advantage of mechanism sand, the application of mechanism sand in high-speed rail, highway and other projects is becoming increasingly widespread.

Edge Lift Anchor

Mechanized sand is made by crushing rocks through sand making machines and related equipment, usually containing a certain amount of clay.

In the industry, the methylene blue value (MB value) is commonly used to evaluate the clay content in sand.

Higher MB values often have adverse effects on the workability of concrete, not only damaging the internal bonding performance of concrete, but also leading to an increase in water or admixture usage.

To reduce the MB value, water washing treatment is often used, but this method can easily lead to water resource waste and environmental issues.

.