Foam concrete roof insulation is an effective method for building thermal insulation. The mix ratio of foam concrete should be determined based on design requirements and actual conditions. The general mix ratio is cement: lime: foaming agent: fiber: water = 1:1:0.5:0.05:0.5, but the specific mix ratio should be determined through experiments and comply with relevant specifications.

Construction Process:

Surface Treatment: Clean the base layer of the roof, ensuring the surface is dry, flat, and free of debris.

Measurement and Layout: Measure and set the roof elevation lines according to design requirements, to determine the thickness and location of the foam concrete.

Mixed Foam Concrete: Mix cement, lime, foaming agent, fiber, and water according to the specified proportions, ensuring thorough mixing for a duration of at least 2 minutes.

Pouring foamed concrete: Pour the mixed foamed concrete onto the sub-base of the roof and level the surface. Control the thickness and uniformity during pouring to prevent the formation of bubbles and hollows. The ambient temperature for pouring should generally be between 5℃ to 35℃, and the height from the pouring outlet to the sub-base should not exceed 1m. The foamed concrete should be poured in layers, with each layer not exceeding 200mm in thickness.

Curing: After the foam concrete pouring is completed, curing is required, with a duration of not less than 7 days. During the curing period, avoid foot traffic and heavy loads to prevent damage to the bubble structure, which could affect the insulation effect and the quality of the work.

Inspection: After the maintenance period, inspect the foam concrete roof for acceptance. During inspection, check surface flatness, thickness, drainage slope, and other indicators, and keep detailed records.