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Underwater non-disjunction Characteristic concrete blendinging constituent and antifoamer null for concrete blendinging constituent
Underwater non-disjunction Characteristic concrete blendinging constituent and antifoamer null for concrete blendinging constituent
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机译:水下非析出特性混凝土配合剂和混凝土配合剂的消泡剂无效
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摘要
PURPOSE: To provide an underwater unseparable concrete blend composition for underwater execution hardly causing separation of materials in water, capable of readily controlling an air amount and using a defoaming agent having low handling cost and a defoaming agent for such concrete blend composition. ;CONSTITUTION: The concrete blend composition is obtained by adding one or two kinds of water-soluble cellulose ethers selected from a group consisting of hydroxyalkyl celluloses and hydroxyalkylalkyl celluloses and an acetylene glycol derivative as the defoaming agent to a concrete blend containing a cement binder, an aggregate and a water-reducing agent. As the acetylene glycol derivative, a nonionic surfactant obtained by adding ethylene oxide to 2,4,7,9-tetramethyl-5-decyne-4,7-diol and having 1-20 ethylene oxide-added mol number is preferably used.;COPYRIGHT: (C)1994,JPO&Japio
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