While epoxy mortar flooring is a feasible floor treatment solution for cleanrooms to meet cleanliness requirements, it must strictly adhere to relevant technical standards and construction specifications. Here are the key points:

I. Applicability of Epoxy Mortar Flooring

Cleanliness Matching

The epoxy mortar flooring system, with its three-layer structure of primer, intermediate mortar layer (a mixture of quartz sand and epoxy resin), and topcoat, can meet the dustproof and wear-resistant requirements of cleanrooms ranging from Class 100,000 to Class 10,000. Its surface flatness can be measured with a 2-meter straightedge, with a gap of ≤1 mm, meeting the flatness requirements of cleanroom floors.

Performance Requirements

Compressive Strength: The intermediate coating of quartz sand (1:3 ratio) enhances compressive strength, meeting the load requirements of a 3-5 ton forklift.

Corrosion Resistance: Must pass tests showing no change after wiping with 98% sulfuric acid solution and no bubbling after immersion in 5% sodium hydroxide solution for 72 hours.

Antistatic Properties: For antistatic workshops, the ground resistance must be controlled within the range of 1×10^6-1×10^9 Ω.

II. Key Construction Control Points

Base Treatment

The cement base layer strength must be ≥20MPa, moisture content ≤8%, and curing period ≥28 days. Expansion joints must be filled with elastic polyurethane sealant (depth ≥20mm), and internal and external corners must be rounded (radius ≥30mm).

Construction Working Environment: Temperature 18-28℃, humidity 45-65%, pressure gradient maintained above 5Pa. The intermediate coating must be completely dry before sanding. The topcoat uses solvent-free epoxy materials with a VOC content ≤50g/L.

III. Comparison with Other Solutions: Self-leveling flooring: Suitable for higher cleanliness levels (e.g., Class 100, Class 1000), thicker (0.6mm-0.8mm topcoat layer), but more expensive. Water-based epoxy flooring: More environmentally friendly, suitable for scenarios with strict VOC emission requirements.

IV. Maintenance Recommendations: Use neutral detergents daily; strong acids and alkalis are prohibited.

In summary, epoxy mortar flat coating flooring, under reasonable design and standardized construction, can meet the cleanliness requirements of most cleanrooms, but process parameters need to be adjusted according to the specific cleanliness level (e.g., Class 10,000 or Class 100,000).