304.2R-91: Placing Concrete by Pumping Methods

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Title: 304.2R-91: Placing Concrete by Pumping Methods

Author(s):

Publication: Technical Documents

Volume:

Issue:

Appears on pages(s): 19

Keywords:

Date: 1/1/1991

Abstract:

Note: 304.2R-91 is Out of Print. However, a newer version of this document exists. This document was replaced by 304.2R-96.

Describes pumps for transporting and placing structural concrete. Rigid and flexible pipelines are discussed, couplings and other accessories described. Recommendations for proportioning pumpable concrete suggest optimum gradation of aggregates; outline water, cement, and admixture requirements; and emphasize the need for field testing of trial mixes for pumpability. Importance of saturating light-weight aggregates is stressed. Suggestions are given for layout of lines; for maintaining uniformed delivery rate as well as uniform quality of concrete at the end of the line; and or cleaning out pipelines. This report does not cover shotcreting or pumping of nonstructural insulating or cellular types of concrete.