Waterproof building materials after the construction of drums, bubble is what reason?
Reason 2: Construction, due to the construction of the membrane waterproof layer of paving is not true, so that part of the empty, remain in which to form a bubble.
Control measures: in the asphalt waterproofing membrane construction, the first surface of the coil clean. When laying the web, the mastic should be painted evenly and carefully compaction work to enhance the cohesive force between the web and the base, the web and the web. High polymer modified asphalt waterproofing membrane construction, the flame heating to be uniform, full, moderate. Paving to roll forward while hot, while rolling with a pressure roller to exclude the air below the coil.
Causes and prevention of drums:
Cause 1: If the membrane waterproof layer if the site is not solid, there is moisture, sunlight or artificial heat in the impact of the internal volume expansion, resulting in drums, the formation of the size of the bubble.
Preventive measures: leveling layer should be kept flat, clean, dry, grass-roots treatment agent should be brushing evenly, which is to prevent the drum from the main measures.
Raw materials in the transport and storage process, should pay attention to moisture and water. To avoid the rainy day, fog, big wind climate conditions under construction, to prevent grass-roots moisture.
When the roof base should not be dry, and anxious to paving the membrane, the use of exhaust roof approach (exposed single layer of waterproofing membrane should not be used).
Reason 3: synthetic polymer waterproofing membrane construction, if the adhesive is not fully dry on the eager to paving the membrane, resulting in a solvent residue in the coil inside, when it evaporates, it will form a bubble.
Control measures: the use of cold and cold method of paving, the brushing of the adhesive to be uniform, to be dry when the handle (refers to touch) is not bonded, before paving the membrane, while compaction. In particular, to prevent the accumulation of adhesive too thick, dry operation caused by the film from the drum.
