Hainan Chengmai Cement Prefabricated Houses
Hainan Chengmai cement prefabricated houses are characterized by low-carbon environmental protection, efficient construction, policy support, and technology that adapts to Hainan's climate, but they also face challenges such as an incomplete industrial chain and relatively high initial costs.
Significant Low-Carbon Environmental Advantages: Cement prefabricated components are produced in factories, which can reduce carbon emissions by about 30% compared to traditional cast-in-place buildings. Hainan's hot and humid climate makes traditional construction prone to dust and wastewater pollution, while prefabricated components, through standardized production, only require assembly on-site, greatly reducing the environmental load.
Substantial Increase in Construction Efficiency: Taking a public housing project in Hainan as an example, the construction period of prefabricated houses has been shortened from the traditional 18 months to 8 months, and labor costs have been reduced by 40%. This is particularly important for Hainan, which is frequently hit by typhoons, as it enables rapid post-disaster reconstruction and reduces the impact of disasters on residents' lives.
Strong Policy Support: The "Green Building Development Regulations" issued by Hainan Province in 2023 clearly require that the prefabrication rate of newly built public buildings should be no less than 35%, and provide a subsidy of 150 yuan per square meter, effectively promoting the standardization of the industry.
Technology Adapts to Hainan's Climate: Prefabricated walls are reinforced with steel bar trusses to withstand typhoons of up to Category 12; some projects adopt hollow concrete structures, which not only reduce self-weight but also enhance wind resistance. The wall sandwich is filled with aerogel materials, improving thermal insulation efficiency by 60% compared to traditional materials; the surface of foundation prefabricated parts is coated with nano waterproof coatings, effectively solving the problem of moisture return caused by Hainan's average annual humidity of 85%. The roof prefabricated panels are reserved with photovoltaic bracket interfaces, adapting to Hainan's advantage of 2,000 hours of annual sunshine and enabling 70% self-sufficiency in building energy consumption.
Coexistence of Industry Status and Challenges: Hainan's prefabricated houses face the problem of an incomplete local industrial chain, with 70% of components currently requiring procurement from outside the province, resulting in initial costs that are 10 - 15% higher than those of traditional buildings. However, Chengmai County has relevant cement product prefabricated component production bases, such as the "Cement Product Prefabricated Component Production Base of Hainan Yonggui United Cement Products Co., Ltd. under Hainan Dazheng Industrial Co., Ltd.", which provides certain support for the development of the industry.
