Foam concrete is a kind of concrete with lightweight and has ideal strength. Because of the hollow structure in foam concrete, it has the function of absorbing heat and isolating sound.
The density of foamed concrete is 300-1200 kg/m3, and the thermal conductivity is between 0.08-0.3W/ (m ·K).
Foam concrete is widely used in CLC blocks, lightweight partition panels, roof insulation, floor cushion construction, floor heating backfilling, and other occasions.
At the same time, foam concrete is also a good sound absorption material, which can be used in highway sound insulation boards, sound absorption boards, and other fields.
Generally speaking, foam concrete is a kind of building material with multi-function, environmental protection, and economy, which has a wide application prospect.
The naphthalene-based high-efficiency water-reducing agent SNF is a concrete admixture, which is one of the most widely used and widely used varieties among concrete admixtures. It is produced from industrial naphthalene through processes such as sulfonation, hydrolysis, neutralization, and condensation. Pure naphthalene-based high-efficiency water-reducing agent is a white powder, easily soluble in water, insensitive to hard water, non-air entraining, resistant to changes in cement variety, with a water reduction rate of over 25%. It can significantly improve the fluidity, impermeability, pumpability, and durability of concrete.
With the continuous advancement of global infrastructure construction, the market demand for naphthalene based high-efficiency water reducing agent SNF continues to grow. Especially in large-scale engineering projects such as bridges, tunnels, and highways, the application of SNF is becoming increasingly widespread, and its market size is expected to continue to maintain a growth trend.
At the same time, with the country's emphasis on environmental protection and sustainable development, the development of naphthalene based high-efficiency water reducing agent SNF also faces higher environmental requirements. Enterprises need to actively respond to national policies, increase investment in environmental protection, and promote the development of the industry towards a more environmentally friendly and sustainable direction.
Significantly improving concrete performance: SNF can significantly enhance the strength of concrete, especially in the early stages, which can significantly accelerate the construction progress of bridges. At the same time, it can also improve the wear resistance, permeability resistance, and corrosion resistance of concrete, which is crucial for the long-term stability of bridges in complex environments.
Optimizing the workability of concrete: SNF has excellent dispersion performance, which can significantly improve the fluidity of concrete, making it easier to pump, pour, and compact. Thus, it greatly improves the construction efficiency of bridge buildings.
Saving material costs: By reducing the water-cement ratio of concrete, SNF can reduce the amount of cement used while ensuring concrete performance, thereby reducing material costs. For large-scale bridge projects, this can save a lot of construction funds.
Enhancing Concrete Durability: SNF can improve the freeze-thaw resistance, impermeability, and durability of concrete, allowing bridges to maintain stable performance in extreme weather and harsh environments and extending their service life.
Strong adaptability: SNF has good adaptability to various types of cement and can be used in combination with various concrete admixtures, making it widely applicable in complex construction environments of bridge construction.
TRUNNANO is a supplier of Naphthalene-based high-efficiency water reducing agent SNF over 12 years experience in nano-building energy conservation and nanotechnology development. It accepts payment via Credit Card, T/T, West Union and Paypal. Trunnano will ship the goods to customers overseas through FedEx, DHL, by air, or by sea. If you are looking for high quality Naphthalene-based high-efficiency water reducing agent SNF, please feel free to contact us and send an inquiry. (sales@cabr-concrete.com).
inquiry: sales@graphite-corp.com
Polycarboxylate superplasticizer, also known as polycarboxylate superplasticizer or superplasticizer, is a high-performance concrete admixture. It belongs to the category of anionic surfactants and has a comb-shaped molecular structure. The main chain is a polycarboxylate polymer, while the side chains contain hydrophilic active groups such as carboxyl, sulfonic acid, and polyether groups.
The main function of polycarboxylate superplasticizers is to improve the workability of concrete through mechanisms such as adsorption, dispersion, wetting, and lubrication. Specifically, it can increase the fluidity of concrete, improve its strength, and reduce the water-cement ratio of concrete, thereby reducing the amount of cement and water used. In addition, polycarboxylate water-reducing agents can effectively control the slump loss of concrete and improve the durability and volume stability of concrete.
Compared with traditional water-reducing agents, polycarboxylate water-reducing agents have advantages such as low dosage, high water reduction rate, significant enhancement effect, and no environmental pollution. This has made them widely used in modern concrete engineering, especially in high-rise buildings, bridges, tunnels, highways, and other engineering fields.
On March 10, 2024, the first prefabricated T-beam of the G5012 Enshi Guangyuan National Expressway from Wanzhou to Kaijiang section (from now on referred to as "Wankaida Expressway"), constructed by China Railway 25th Bureau, was successfully poured and construction entered a new stage. It is reported that the T-beam production plant is located in Kaizhou District, Chongqing, with a total area of 55.4 acres, and plans to produce 914 T-beams. The first prefabricated T-beam completed this time is 30 meters long and 2 meters high, with a T-beam wing plate width of 1.8 meters. The smooth pouring of the first prefabricated T-beam has created conditions for the large-scale standardized construction and procedural management of the beam fabrication site.
Excellent water-reducing effect: Polycarboxylic acid is an excellent water-reducing agent that can effectively reduce the cement dosage in concrete. This means that in highway construction, the use of cement can be reduced while meeting design requirements, thereby reducing costs and contributing to environmental protection.
Improving concrete performance: By reducing the amount of cement used, polycarboxylate water-reducing agents can significantly improve the fluidity and plasticity of concrete and its workability. At the same time, they can effectively delay the initial setting time of concrete, reduce shrinkage cracks and water permeability, and improve the impermeability and durability of concrete.
Improving construction efficiency: Polycarboxylate water-reducing agents improve the fluidity of concrete, making it easier to pump and pour, thereby improving construction efficiency. In addition, they can also extend the setting and solidification time of concrete, providing more operating time for construction and facilitating the control of construction progress.
Strong adaptability: Polycarboxylic acid water-reducing agents are well-suited to various types of cement and can be widely used in different types of highway construction. Whether on highways, urban roads, or rural roads, polycarboxylate water-reducing agents can improve the performance of concrete.
Outstanding environmental performance: The use of polycarboxylate water-reducing agents can reduce the amount of cement used in concrete, thereby reducing greenhouse gas emissions such as carbon dioxide generated during cement production. Meanwhile, due to its excellent water reduction effect, it can also reduce water consumption and further reduce wastewater discharge, which is beneficial for environmental protection and sustainable development.
In summary, polycarboxylate water-reducing agents have many advantages in highway construction. They can effectively improve the performance and construction efficiency of concrete, reduce costs, and contribute to environmental protection and sustainable development. Therefore, it is necessary to widely apply polycarboxylate water-reducing agents in highway construction.
TRUNNANO is a supplier of Polycarboxylate Superplasticizer over 12 years experience in nano-building energy conservation and nanotechnology development. It accepts payment via Credit Card, T/T, West Union and Paypal. Trunnano will ship the goods to customers overseas through FedEx, DHL, by air, or by sea. If you are looking for high quality Polycarboxylate Superplasticizer PCE Powder, please feel free to contact us and send an inquiry. (sales@cabr-concrete.com).
Concrete has been the most widely used building material since the new construction revolution. The development of materials science has continuously changed into countless forms.
Among these forms, the editor feels that the one that best reflects concrete itself is the concrete architecture of the brutal era. The rough and brutal texture and the exaggerated shape that can accommodate almost any imagination give people unparalleled visual shock and spiritual impact.
Today, I would like to introduce you to St. Mary's Cathedral in Germany, which is, in my mind, the pinnacle of brutal concrete architecture.
Architectural design: Gottfried Bohm
Year built: 1968
Project Location: Nerwigs, Germany
St. Mary's Cathedral rises like a mountain among the trees, its jagged concrete volumes soaring into the sky.
The church was built at a popular pilgrimage site in western Germany, attracting countless visitors and pilgrims worldwide for centuries. Yet unlike its medieval and baroque predecessors, the unabashedly modernist pilgrimage church reflected a significant shift in its creator's perspective: a new way of thinking about the postwar German people and the wider Catholic Church.
Pilgrims have been traveling to Nevergues since the late 18th century. The site was too popular for the existing Baroque monastery, leading to constructing an auxiliary structure in the early 20th century, even with this purpose-built structure, the surge in pilgrim numbers after the Second World War caused the Nervigus Church to exceed its modest capacity greatly. In 1960, it was decided to build a new pilgrim church to cope with the large influx of tourists.
With this goal in mind, the Archdiocese of Cologne organized an architectural competition in 1963-1964. The competition called for a church with a seating capacity of 900 people, plus standing room for more than 3,000 people; other required elements included two chapels, a confessional chapel, a sacristy, a bell tower and other ancillary spaces. The jury and Archbishop of Cologne Josef Frings unanimously decided that the plan of German architect Gottfried Bohm was the winner.
Despite being located in a small, relatively remote community, the Pilgrimage Church is monumental. Bohm was a famous German Expressionist who believed that sacred architecture—contemporary or otherwise—should evoke emotions in the viewer. Whether by rail, road or on foot, a mountain-like concrete spire can be seen from a distance. The path leading to the church is bordered by a wall on one side and offices and cloisters on the other, creating a formal sense of procession where pilgrims complete the final leg of their journey.
If it weren't for the metal cross adorning the tallest spire, it would be impossible to tell that this imposing concrete building is a church. According to Boehm, the building consists of a series of concrete cubes and pyramids, jagged, amorphous volumes designed to reflect the area's mountainous topography.
Once visitors enter the church, the towering structure is briefly obscured in a relatively low-ceiling foyer, providing a moment of visual suspense before entering the hollow volume of the main worship space. Like the exterior, the interior is constructed from irregular geometric shapes of concrete on a cathedral-like scale, with the junctions of the sloping roof planes above punctuated by louvers that allow natural light to enter the space.
The interior space is dominated by the altar, which, although not exactly on the same axis as the main entrance, was placed in the center of the space according to the Archbishop's preference.
In keeping with Bohm's unique style, the otherwise featureless gray concrete is punctuated by brightly colored stained glass windows. Mainly colored red, blue and green, Bohm designed the windows and abstractly depict some typical Saint Mary-related themes, including a large red rose.
Classic design works often have a unique charm. They reflect the design philosophy, shape control, and detail processing of the master architects involved in the design project. They are worth learning.
TRUNNANO is a supplier of concrete defomer over 12 years experience in nano-building energy conservation and nanotechnology development. It accepts payment via Credit Card, T/T, West Union and Paypal. Trunnano will ship the goods to customers overseas through FedEx, DHL, by air, or by sea. If you are looking for high quality concrete crack reducing admixture, please feel free to contact us and send an inquiry. (sales@cabr-concrete.com).
Concrete admixtures are materials added to concrete before or during the mixing process, in addition to cementitious materials, aggregates, water, and fiber components. It is mainly used to improve fresh and hardened concrete performance and has no harmful effects on human, biological, or environmental safety.
Just weeks after a 900-unit apartment block was found to be in danger of collapsing, developers of yet another apartment block have been told to address a series of issues urgently.
The five-storey building at 11-15 Mitchell Ave in Jannali, in Sydney's south, which consists of 31 apartments, had 47 defects found during an inspection in 2023, developer of the new-build apartment development Mitchell Avenue Development said this week. Four received a building works rectification order from the NSW Building Commission.
The report said there were problems with the building's concrete and waterproofing, and fire safety did not comply with regulations. Mitchell Avenue Development has 120 days, by May 31, to complete work to fix the defects.
Cracks were found in the concrete of apartment balconies and the building's fire stairways, and foreign objects were found in materials in various areas of the underground car park. The fire stairway on the fourth floor of the building had cracked concrete and exposed steel bars, causing rust. Concrete in other sections was found to need to be properly vibrated or compacted.
Waterproofing issues accounted for 16 defects, as inspectors found numerous instances of water penetrating properties and damaging apartments. A further 17 defects were found to be related to fire safety, one of which included a gap found in a fire door. All cabinet doors on the residential floors were also found to be without fire-resistant, non-combustible coverings or smoke seals. The report said Mitchell Avenue Development was committed to fixing the defects, but they questioned why builder Truland Development was not held accountable.
NSW Acting Building Commissioner Elizabeth Stewart wrote in the report that the extensive work to fix the defects could be expensive but must comply with industry standards. Greenland Australia, the developer of 23 Halifax St in Macquarie Park, was issued another building works improvement order a few weeks ago.
Concrete slabs were severely damaged and deteriorating at the joints between the basement and first floor and on the 6th, 11th, 17th, 22nd, and 31st floors. The horizontal floor surfaces of the basement and roof were also deemed not to have sufficient slope to the drain openings, causing excess water to accumulate in the area. Artistry defects reportedly caused the problems and could cause the entire 900-apartment building or part of it to collapse. Planning records show the development, which has 31 apartments, was approved by Sutherland Shire Council in 2018.
Air-entraining agent: Air-entraining agent can introduce an appropriate amount of stable bubbles during the concrete mixing process, thereby improving the durability of the concrete. It is mainly used in projects with anti-mixing and anti-freezing requirements.
Retarder: Retarder can extend the hardening time and hydration time of the cement contained in concrete, reduce the hydration heat generated in the early stage of concrete, avoid concrete cracking, and prevent construction joints in concrete due to continuous pouring. In addition, it can also maintain good workability of concrete constructed at high temperatures and extend the release time of hydration heat to avoid surface cracks.
Early strength agent: Early strength agent can shorten the setting time of cement contained in concrete. It suits steam curing, prefabricated components, and concrete projects with low temperature and early strength requirements. It can improve the early strength of concrete, speed up construction progress, and shorten the time of concrete Construction and maintenance time.
Water-reducing agent: Water-reducing agent can reduce the amount of cement contained in concrete, has a relatively high water-reducing rate, can effectively reduce the loss of concrete slump, increase the filling and pumpability of concrete, and reduce equipment and Operational effects to maintain the stability of concrete.
In addition, other types of concrete admixtures, such as composite expansion agents, waterproofing agents, and rust inhibitors, are used for different purposes, such as improving the early strength and impermeability of concrete and preventing corrosion of steel bars.
When selecting concrete admixtures, the correct choice should be made based on the actual construction environment, construction needs, etc., to ensure the best improvement in concrete performance. At the same time, when using concrete admixtures, they need to be evenly mixed with the concrete in the correct proportion to ensure that the admixture can fully exert its effect.
TRUNNANO is a supplier of waterproof agent(which is one of concrete additives) with over 12 years experience in nano-building energy conservation and nanotechnology development. It accepts payment via Credit Card, T/T, West Union and Paypal. Trunnano will ship the goods to customers overseas through FedEx, DHL, by air, or by sea. If you are looking for high quality concrete additives, please feel free to contact us and send an inquiry. (sales@cabr-concrete.com).
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