A study of annular slurry jet for abrasive waterjet cutting
A Study of Annular Slurry Jet for Abrasive Waterjet Cutting
FUNDAMENTALS OF WET ABRASIVE BLASTING
Ways must be found to reduce or eliminate dust generated during surface preparation and wet abrasive blasting, as an alternative to dry blasting, can be an answer to the problem. The equipment available for wet abrasive blasting is reviewed, comparing various types as to their convenience, productivity, abrasive suitability and consumption, inhibitor mixing, and water pressure and volume required.
Experimental study on bond behavior between high-strength grout and deformed steel bars
Abstract Engineers use high-strength grout to connect precast concrete members for its low shrinkage and good fluidity. This paper designed 87 central pull-out specimens using the control variable method to investigate the influence of factors on the rebar-grout bond property such as compressive strength, steel grade, bar diameter, transverse stirrups, and bond length. The test result showed that improving grout compressive strength (85.8 MPa–122.7 MPa) cannot improve the bond strength, which was different from the previous conclusions of concrete pull-out tests. Simplified formulas were presented for calculating the characteristic values of bond strength, residual strength, peak slip, and relative slip of load-holding platform based on parameter analysis. Then, a constitutive model was proposed to predict the full-range bond stress-slip curve of high-strength grout and steel bar specimens from bearing to failure. Finally, FEA models were established to evaluate the applicability and accuracy of the constitutive model.