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- W580373156 abstract "Optimum compaction of concrete must be achieved if the concrete is going to achieve its strength and durability requirements. This article discusses the compaction process, tracing the early techniques and reporting on todays's equipment. The historical background is briefly reviewed, together with the relationship between vibration and compaction. Characteristics of fresh concrete such as compactability, mobility and stability are outlined and a discussion of vibration mechanisms is presented. Aspects of vibration and vibrators are discussed under the following headings: types of vibrators, internal vibrators, flexible shaft poker vibrators, pneumatic poker vibrators, external vibrators, vibrating screeds, table vibration, internal vibrators, poker sizes and applications (tabulated data), length of head, using a poker vibrator (detailed guidelines), length of time required for full compaction, revibration and care and maintenance of poker vibrators. External or clamp-on vibrators are dealt with in rather less detail. It is pointed out that though modern day methods of mechanical vibration provide the economic means of compacting concrete in most construction situations, they cannot make up for human deficiencies in the handling of equipment which usually relates to having insufficient manpower and equipment available to match the speed of concrete placing that can be achieved. (TRRL)" @default.
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- W580373156 date "1982-07-01" @default.
- W580373156 modified "2023-09-27" @default.
- W580373156 title "VIBRATION OF CONCRETE" @default.
- W580373156 hasPublicationYear "1982" @default.
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