By Rochelle C. Jaffe
Rochelle Jaffe is an authorized architect and a certified structural engineer. She can be qualified as a building specifier (by the development Specification Institute) and as a distinct inspector of structural masonry (by the foreign convention of creating Officials). As a Senior venture advisor with NTH specialists, Ltd., in Farmington Hills, Michigan, Ms. Jaffe focuses on research, overview, and rehabilitation of current, deteriorated, and broken masonry buildings, and has over two decades' event during this field.Ms. Jaffe is a member of the yankee Concrete Institute (ACI) and the yank Society of Civil Engineers (ASCE). As an lively member of The Masonry Society (TMS), she is a former member of the Board of administrators and a former editor of the magazine, serves at the layout Practices Committee, and is present chairperson of the Architectural Practices Committee. Her lively participation within the ACI/ASCE/TMS Masonry criteria Joint Committee, the gang that authors the construction Code specifications for Masonry constructions (ACI 530/ASCE 5/TMS 402) and the Specification for Masonry buildings (ACI 530.1/ASCE 6/TMS 602), comprises serving as a former chair of the Stone Cladding Subcommittee.Ms. Jaffe has authored or co-authored journal articles and texts, in addition to various technical experiences relating to investigations of masonry buildings with fabric and architectural or structural deficiencies. She has spoken at numerous seminars and different technical features.
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B Abrasion index is calculated from the cold absorption in percent and the compressive strength in psi as abrasion index = (100)(absorption)/compressive strength. c Volume abrasion loss is determined from a modified version of ASTM C 418 Test Method for Abrasion Resistance of Concrete by Sandblasting. (Extracted, with permission, from ASTM C 902 Standard Specification for Pedestrian and Light Traffic Paving Brick, copyright ASTM International, 100 Barr Harbor Drive, West Conshohocken, PA 19428.
25 inches. Like compressive testing, five test specimens are required for each condition of testing. 25 inches thick, and at least six specimens must be tested. 25 inches thick. 5 inches. At least five test specimens are required for each condition of test. This flexural testing consists of applying two lines of load, each at the quarter point of the span. Evaluation of weather resistance of slate is performed in accordance with ASTM C 217. Three test specimens, each 2 inches by 4 inches, are required.
The saturation coefficient requirement is waived if the average water absorption is less than 6% after 24-hr submersion in room-temperature water. b (Extracted, with permission, from ASTM C 902 Standard Specification for Pedestrian and Light Traffic Paving Brick, copyright ASTM International, 100 Barr Harbor Drive, West Conshohocken, PA 19428. org). those for pavers set in rigid paving, the physical requirements for Type F pavers are more stringent. 15. 12 Abrasion Resistance Requirements for ASTM C 902 Pedestrian and Light Traffic Paving Bricka Abrasion Unit Type Type I Type II Type III Maximum Abrasion Max.