Materials for Rural Mobile Toilet Renovation
Common materials for rural mobile toilet renovation include brick-concrete materials, precast concrete components, fiberglass reinforced plastic (FRP), plastic materials, and ceramic-PE composite materials. The choice should be made based on local climate, soil conditions, budget, and other factors.
Brick-concrete materials are a traditional choice for rural dry toilets, using red bricks, cement, and sand as the foundation, combined with cement mortar masonry and surface plastering for waterproofing. Their advantages include easy access to red bricks, low entry threshold for construction teams, controllable costs, and the ability to adjust toilet size and space plasticity after wall construction. However, they have shortcomings such as high porosity in red bricks leading to easy water seepage, heavy weight requiring high foundation requirements, susceptibility to freeze-cracking in northern winters, and long construction periods. Pure brick-concrete solutions are more commonly used in on-site renovation and expansion projects.
Precast concrete components are prefabricated in factories, including septic tanks, toilet wall panels, and floor slabs, which are then transported to the site for assembly. Made of reinforced concrete, they offer high overall strength and good pressure resistance, with better sealing performance than ordinary brick-concrete when properly waterproofed. Production in factories ensures stable quality, reduces on-site work, speeds up construction, and integrated prefabricated septic tanks offer even better sealing. However, they are heavy, requiring corresponding equipment for transportation and lifting, and can be difficult to handle in remote rural areas. Component surfaces are prone to capillary pores, necessitating internal and external waterproof coatings, and long-term outdoor use requires attention to surface weathering.
Fiberglass reinforced plastic (FRP) is a mainstream lightweight material for dry toilet tanks, molded from resin and glass fiber composites. It is formed in one piece without joints, offering outstanding waterproofing, corrosion resistance, and long-term resistance to fecal erosion. The product is lightweight, easy to handle, has strong acid-alkali resistance, is rust-resistant, and has a considerable service life under normal use. In low-temperature environments, properly selected models offer good freeze resistance. However, there is a significant quality gap in the market, with raw material ratios and wall thickness affecting durability. When purchasing, actual workmanship should be inspected to avoid thin-walled products deforming under pressure.
Plastic materials commonly include PE plastic integrated septic tanks, mostly molded using rotational molding technology. They have good toughness, are lightweight, easy to transport and install, have good sealing performance, are not prone to leakage, are molded in one piece without seams, are corrosion-resistant, and do not require large machinery for installation.
In ceramic-PE composite materials, the main body of household toilets is made of ceramic, which is smooth and highly corrosion-resistant. Some key components use PE (polyethylene) injection molding to manufacture three-chamber septic tank connectors, sewage pipes, and other structures. PE material has impact resistance and low-temperature resistance, maintaining toughness at -25℃ to prevent leakage caused by freeze-cracking. Injection molding allows precise shaping of complex forms, ensuring a sealed connection between the sewage outlet and septic tank.
