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- W569852833 abstract "PISTON, PNEUMATIC, AND SQUEEZE-PRESSURE TYPE PUMPS FOR TRANSPORTING AND PLACING STRUCTURAL CONCRETE ARE DESCRIBED. RIGID AND FLEXIBLE PIPELINES ARE DISCUSSED, COUPLINGS AND OTHER ACCESSORIES DESCRIBED, AND DELIVERY CAPACITY FOR VARIOUS SIZES OF LINES REPORTED. 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 PRESOAKING OF LIGHTWEIGHT AGGREGATES IS STRESSED. SUGGESTIONS ARE GIVEN FOR LAYOUT OF LINES; FOR MAINTAINING UNIFORM DELIVERY RATE AS WELL AS UNIFORM QUALITY OF CONCRETE AT THE END OF THE LINE; AND FOR CLEANING OUT PIPELINES. SHOTCRETING OR PUMPING OF NONSTRUCTURAL INSULATING OR CELLULAR TYPES OF CONCRETE IS NOT COVERED HERE. /AUTHOR/" @default.
- W569852833 created "2016-06-24" @default.
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- W569852833 date "1971-05-01" @default.
- W569852833 modified "2023-09-27" @default.
- W569852833 title "PLACING CONCRETE BY PUMPING METHODS" @default.
- W569852833 hasPublicationYear "1971" @default.
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