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Fragmentation of concrete with hydraulic jets.

Authors
Frank-JN; Chester-JW
Source
NTIS: PB 205 499 1971; :1-32
Link
NIOSHTIC No.
10001724
Abstract
A factorially designed, hydraulic fragmentation experiment using a high-pressure water jet was conducted on concrete blocks. Three levels of pressure, standoff distance, and impact angle and two levels of traverse time and surface condition were used. Three variables were measured: depth of penetration, volume of material removed, and width of slot. Three stepwise linear regression equations were developed from the jet parameters and the physical properties of the concrete. The three basic equations, describing the significant jet parameters and physical properties, were developed into 15 predictor equations, five for each variable investigated. Direct regression equations were also developed for each variable investigated to show the result of increasing or decreasing each significant variable. Energy efficiencies were developed for the experiment and for each significant factorial variable.
Keywords
Mining-industry
Publication Date
19710101
Document Type
IH; Report of Investigations
Fiscal Year
1971
NTIS Accession No.
PB-205499
NTIS Price
A04
Identifying No.
RI 7572
NIOSH Division
TCRC
Source Name
NTIS: PB 205 499
State
MN
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