Dongguan Cement Prefabricated House
Dongguan cement prefabricated houses are prefabricated buildings formed by integral pouring of reinforced concrete, enjoying policy support, performance advantages, and cost-effectiveness, but with limitations in earthquake resistance, sound insulation, and heat insulation.
Policy and Implementation Background
Since promoting the development of prefabricated buildings, Dongguan City has implemented 561 projects with a total area of 35.211 million square meters. According to the Notice on Further Clarifying the Implementation Standards and Scope of Prefabricated Buildings in Dongguan City and Other Related Work Requirements, starting from January 1, 2023, social investment projects with a floor area exceeding 50,000 square meters (excluding factory buildings under 60 meters) and fiscal investment projects exceeding 5,000 square meters must implement prefabricated buildings in accordance with Guangdong Province or national standards, with the application ratio of horizontal prefabricated components reaching 80%. This policy provides a clear basis for the promotion of cement prefabricated houses.
Enterprise Production and Technical Characteristics
Taking Huacheng Cement House Factory as an example, its products are formed by integral pouring of high-standard reinforced concrete in one go, resulting in a dense and sturdy structure with mature technology. The houses offer multiple performance advantages:
- Stability and Durability: They exhibit strong overall stability, excellent load-bearing capacity, and a designed service life of over 70 years. They support overall relocation or secondary disassembly and reassembly, enabling cost savings through recycling.
- Environmental Adaptability: They are earthquake-resistant, pressure-resistant, fire-resistant, heat-insulating, wind-resistant, moisture-proof, corrosion-resistant, and weather-resistant, suitable for year-round construction without seasonal or weather limitations.
- Wide Application Scenarios: They can be used to construct office buildings, dormitories, garages, storage warehouses, etc., covering various needs such as rural dilapidated house renovation, rural self-built houses, and temporary housing on construction sites.
Advantages and Disadvantages Analysis
Advantages:
- High Cost-effectiveness: The unit price is approximately 300 yuan per square meter, and the cost of a two-story small building is about 100,000 yuan, saving 50% compared to traditional brick houses.
- Efficient Construction: The main body assembly takes only 4 hours, and the overall occupancy cycle is shortened to two or three days, suitable for urgent housing needs.
Disadvantages:
- Insufficient Earthquake Resistance: They have low applicability in earthquake-prone areas, posing safety risks.
- Poor Comfort: They have weak sound insulation and heat insulation effects, being hot in summer and cold in winter. The joints are prone to water leakage, and long-term use may lead to steel bar corrosion, affecting the service life.
- Functional Limitations: They are difficult to meet the needs of smart home installation or personalized requirements such as garages, and the actual service life depends on construction quality.
Suitable Scenario Recommendations
Cement prefabricated houses are suitable for projects that are sensitive to cost, have urgent construction deadlines, and are not in earthquake-prone areas, such as rural renovation, temporary housing, or storage facilities. For long-term residence or pursuit of comfort, they need to be combined with traditional buildings or additional renovation measures.
