Section 5.1.1 is part of the description of a flatjack, under the Apparatus Section of the Standard. The description states that a flatjack may be pressurized with hydraulic oil. Hydraulic oil is one of several hydraulic fluids can be used with hand pumps and flatjacks used in testing. However, other hydraulic fluids are also used in this application. In practice, the use of water or water-based hydraulic fluids with a stainless steel pump can be beneficial in flatjack testing since any spills or leaks of water are much less likely to stain or damage the masonry and surrounding materials than hydraulic oil. This ballot proposes to change the reference to hydraulic oil to the more general term hydraulic fluid in order to allow the use of water and other non-oil hydraulic fluids. Similarly, section 8.8 which describes part of the test procedure references filling the flatjack using hydraulic oil. As with section 5.5, this ballot proposes changing this reference to hydraulic fluid. A similar ballot item is proposed for the corresponding language in Section 5.1.1 and 8.8 of ASTM C1197, In Situ Measurement of Masonry Deformability Properties Using the Flatjack Method.
Keywordscompressive stress; flatjack; in situ; masonry; nondestructive evaluation; Compression testing--masonry/mortar; Flatjack method; Masonry units; Multi-whythe masonry; Nondestructive evaluation (NDE)--nonmetallic materials
Ballot Item Approved as C1196-2014 and Pending Publication