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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Pumping of Lightweight Concrete Using Non-Presoaked Lightweigh tAggregate
Author(s): T. Yonezawa, Y. Yoshioka, T. Iwashimizu, K. Nanjo, S. Yoneda, K. Sakaue, and T. Nakase
Publication: Special Publication
Appears on pages(s): 625-654
Keywords: absorption; air entraining agents; freeze-thaw durability; lightweight aggregate concretes; lightweight aggregates; pumped concrete; strength; water; water-reducing agents; Materials Research
Abstract:Focus is the study of basic properties of the low water-absorption lightweight aggregate and the water-absorption reducing agent that were developed to make the pumping of lightweight concrete using non-presoaked lightweight aggregate possible. The water absorption of the low water-absorption aggregate was extremely small. The compressive strength and modulus of elasticity of the concrete were found to be considerably higher than those of the concrete using ordinary calcined expanded shale aggregate. The water-absorption reducing agent reduced water absorption under pressure considerably. The compressive strength and modulus of elasticity of the concrete using the aggregate that was treated with the agent were not significantly influenced by the agent. The concrete using the dry low water-absorption aggregate without presoaking that was treated with the agent was pumped through a pipeline with an equivalent horizontal length of 160 m. However, as the aggregate absorbed water, it showed a drop in slump, an increase in compressive strength, and a particular internal pressure distribution along the pipeline.
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