In the first season, we explored the vast potential of foam concrete blocks as a new type of wall material in construction, analyzing it from the perspective of national policy, technological characteristics, and development trends. Foam concrete blocks are lightweight, high-strength, moisture-resistant, sound-insulating, and heat-insulating, making them an ideal energy-saving building material. They align with national policies on wall reform and enjoy government support, including VAT exemptions and reduced fees for wall renovation. These benefits lower construction costs and encourage adoption by construction companies. Additionally, they use abundant raw materials at low cost, have a simple production process, require low investment, offer fast production, high profit margins, and are environmentally friendly.
There are two main production technologies for domestic foam concrete: steam-free foam concrete block equipment and autoclaved aerated concrete block equipment. This has led to confusion among investors, making it essential to compare the advantages and disadvantages of both systems to help those interested in the building materials industry make informed decisions.
**1. Differences and Characteristics Between Steam-Free Blocks and Autoclaved Aerated Blocks**
Autoclaved aerated concrete blocks contain cement, lime, fly ash, and other ingredients, and are formed through steam heating and curing—hence the term "aerated blocks." In contrast, steam-free foam concrete blocks are made using natural curing without steam, and do not add air during the process. Despite differences in production methods, their strength and density are similar to that of aerated blocks. These blocks are widely used in urban high-rise construction, solving issues related to lightweight insulating walls in framework structures, and offering significant market potential.
**From the Source of Raw Materials:**
- **Steam-free foam concrete blocks:** Combine cement with industrial waste such as coal ash, slag, coal gangue, ceramsite, tailings sand, volcanic ash, steel slag, and others, along with high-tech foaming agents.
- **Steam-cured blocks:** Use cement blended with similar materials and foaming agents.
**From the Production Process:**
- **Steam-free blocks:** Mix cement with waste materials, add foaming agents, pour into molds, cure, and cut into desired sizes.
- **Steam-cured blocks:** Grind materials into slurry, mix with lime, cement, gypsum, and foaming agents, then cure, cut, and press in an autoclave under high pressure and temperature.
**From Production Process and Cost Comparison:**
- **Steam-free blocks:** The process is simpler, eliminating the need for high-temperature steaming, reducing labor, resources, and time, thus lowering costs significantly. It is also eco-friendly, saving energy and avoiding pollution.
- **Steam-cured blocks:** Require a large initial investment (over 1 million RMB), complex processes, and face challenges in environmental approvals. Their reliance on fly ash and aluminum powder makes them less flexible, and the high energy consumption and pollution raise concerns about long-term viability.
In practice, steam-cured blocks often face issues like joint cracking, plaster layer cracking, hollowing, leakage, and reduced sound insulation.
Overall, steam-free foam concrete blocks offer more advantages, being low-carbon, eco-friendly, lightweight, strong, and shock-absorbing. Their equipment is simple, cost-effective, and suitable for small and medium investors, making them ideal for widespread adoption.
While steam-cured blocks are environmentally friendly and perform well, their high investment and slow return make them less attractive for many.
**Second, Development of Domestic Foam Concrete Block Equipment**
According to statistics from the National Development and Reform Commission, China aims to complete 1 billion square meters of new green buildings during the “Twelfth Five-Year Plan†period. By 2015, 20% of new urban projects should meet green building standards. Energy-saving renovations in northern heating areas will cover over 400 million square meters, and 50 million square meters in hot summer and cold winter regions. By 2020, the energy-saving renovation of urban residential buildings in the north will be largely completed, creating a huge market for energy-efficient building materials.
With national support for new wall materials like foam concrete, many enterprises have entered the industry, leading to market chaos. Most domestic foam concrete equipment is semi-automatic, but some companies exaggerate their automation capabilities, causing investor losses. For example, some machines require multiple molds, take hours to demold, and increase labor costs. Others produce dust, damage blocks, and lack recyclability.
Only a few companies in China offer fully automatic equipment, which operates efficiently, reduces labor, and increases output. These systems include storage, metering, mixing, curing, cutting, and packaging, achieving high productivity with minimal workforce.
**Third, Guangzhou Oufu's Exclusive Technology for Small and Medium Investors**
Guangzhou Oufu’s steam-free foam concrete block equipment offers intelligent, fully automated operation. Its unique pre-curing kiln ensures optimal temperature and humidity for cement setting, reducing cracks and improving quality. It allows demolding in just 8–10 minutes, a first in China.
After demolding, a wet cutting process minimizes waste, which can be recycled. The product is then placed in an autothermal maintenance kiln, where mist and heat improve durability and reduce manual maintenance. This system is mobile and adaptable to different site needs.
Investors must carefully evaluate partners based on integrity, strength, and service. Choosing a reliable manufacturer ensures long-term success. Guangzhou Oufu provides quality equipment, strong production capabilities, and comprehensive after-sales support, making it a trusted choice.
Investing in foam concrete block production with Guangzhou Oufu’s steam-free technology is a smart decision. As the future of new wall materials, it offers sustainable growth and profitability.
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Xuzhou Xinghe New Building Materials Co., Ltd. , https://www.successleo.com