EXPAN 25
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CONCRETE LINE Anti-shrinkage expansion agent Non-metallic expansion agent to compensate for concrete and mortar shrinkage Technical Data Physical state: powder EXPAN 25 is a special calcium oxide-enriched additive with a specific grinding fineness. EXPAN 25 ingredients enable you to properly regulate the reaction rate with water and resulting calcium oxide to calcium hydroxide conversion. Colour: grey EXPAN 25 is used to compensate for concrete shrinkage and more specifically for: - reinforced and prestressed concrete structures - industrial flooring; - sports facility flooring: skating, cycling, track, tennis; - cold storage flooring; - shoring and underpinnings; - underground structures beneath the water table, cellars, bunkers; - elongated and fully two-dimensional structures; - redundant structures; - prestressed concrete beams; - annular girders and reticular beams; - bridge deck slabs; - raw concrete roof slabs; - thin concrete structures; - tunnel enclosures; - box profile and dome roofs; - filling in hollow structures. Hydraulic works - Pipes, conduits, sewers, culverts; - tanks, reservoirs, pools. Structures exposed to seawater, such as: - piers, quays, sea works slabs; - water purification plants; - tanks and receptacles for liquid or gaseous substances; - standard and prestressed concrete cylindrical structures; - liquid injection sealing. Structural restoration - Additional reinforcement and buttressing elements for existing structures; - column and support pile restoration; - floor slabs and flooring inserts; - rock and stone wall reinforcement. Prefabrication - Thin prefabricated panels; - electrical transmission towers and conduits; - long-span beams; - railroad ties and slabs. EXPAN 25 should not be used in unreinforced or unconfined concrete with crushproof buttresses. HOW EXPAN 25 WORKS 20-kg bags Volume contraction occurs to a varying degree in all types of cement-based mixes (except slab castings) and is known as "concrete shrinkage." Just after casting concrete, the rate of such contraction manifests with mix DRACO Italiana S.p.A. - Via Montegrappa 11 D/E - I-20067 Tribiano, Milan, Italy Tel. +39 0290632917 - Fax +39 0290631976 - info@draco-edilizia.it

CONCRETE LINE Anti-shrinkage expansion agent EXPAN 25 water evaporation. Any structure will limit free deformation, therefore, shrinkage translates into tensile stress, which, when exceeding the concrete's resistance, will cause it to crack. This phenomenon carries negative consequences, both from the aesthetics and durability perspectives. EXPAN 25 should be used in proportions calculated on the basis of various parameters because it causes the concrete volume to increase so as to compensate for shrinkage. One of the most important factors to consider in shrinkage compensation is the W/C...

CONCRETE LINE EXPAN 25 should be put into the concrete mixer along with the cement and mixed for at least 5 minutes at high-speed rotation until all ingredients have been added. PACKAGING & STORAGE EXPAN 25 comes packaged in 20 kg bags. Stored properly in a dry location indoors, EXPAN 25 ingredients will remain intact for one year. SPECIFICATION ITEM © Copyright 2010 - All rights reserved - The following specifications provide reliable details about our current best knowledge and know-how. Changes may take place according to the accuracy of the application steps we shall not be held...