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Maybe you haven’t given much thought to the growth of interlaminar cracks, or cracks in between layers, in laminated composite materials. Perhaps you should though, because such materials are everywhere and interlaminar cracks can cause serious damage to many types of structures and products, from sports equipment to spacecraft. This is why a new ASTM standard, D7905/D7905M , Test Method for…, Technical Contact:, Barry D. Davidson, Ph.D. Syracuse University, Syracuse, N.Y., tel +1.315.443.4201; bddavids@syr.edu, ASTM Staff Contact:, Ashley Wiand, tel +1.610.832.9551; awiand@astm.org, ASTM PR Contact:, Barbara Schindler, tel +1.610.832.9603; bschindl@astm.org Release #9724
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A new ASTM International standard fills an industry need for damage resistance testing of sandwich constructions, a common composite structural configuration. ASTM D7766/D7766M , Practice for Damage Resistance Testing of Sandwich Constructions, was developed by Subcommittee D30.09 on Sandwich Construction , part of ASTM International Committee D30 on Composite Materials . “ASTM D7766/D7766M will…, Technical Contact:, Adam J. Sawicki, Boeing Co., Philadelphia, Pa., Phone: 610-591-2807; adam.j.sawicki@boeing.com, ASTM Staff Contact:, Ashley Wiand, Phone: 610-832-9551; awiand@astm.org, ASTM PR Contact:, Barbara Schindler, Phone: 610-832-9603; bschindl@astm.org R elease #9195
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Current members of ASTM International Committees C01 on Cement and C09 on Concrete and Concrete Aggregates , and other interested parties, are invited to join a new C01 subcommittee, C01.98 on Sustainability Assessment. The scope of C01.98 is to support the development and maintenance of standards related to methodologies and metrics for assessing sustainability in the manufacture and use of…
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A new ASTM International practice provides a standard for preparing a mixture of cement paste that will simulate the shearing experienced by the cement paste in concrete. The new standard, ASTM C1738 , Practice for High-Shear Mixing of Hydraulic Cement Pastes, was developed by Subcommittee C01.22 on Workability , part of ASTM International Committee C01 on Cement . According to Chiara Ferraris,…
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A new ASTM International standard will answer industry’s need for determination of fatigue properties of open-hole composite laminates. ASTM D7615/D7615M , Practice for Open-Hole Fatigue Response of Polymer Matrix Composite Laminates, was developed by Subcommittee D30.05 on Structural Test Methods , part of ASTM International Committee D30 on Composite Materials . The purpose of ASTM D7615/D7615M…, ASTM Committee D30 Next Meeting:, Oct. 17-19, 2011, in conjunction with the Society for the Advancement of Material and Process Engineering, Fort Worth, Texas, Technical Contact:, Mark Chris, Bell Helicopter Textron, Inc., Dallas, Texas, Phone: 817-280-872; mchris@bellhelicopter.textron.com, ASTM Staff Contact:, Ashley Wiand, Phone: 610-832-9551; awiand@astm.org, ASTM PR Contact:, Barbara Schindler, Phone: 610-832-9603; bschindl@astm.org Release #8914
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ASTM International Committee D30 on Composite Materials is currently developing a proposed new standard, ASTM WK30231 , Practice for Damage Resistance Testing of Sandwich Constructions, which will be the first industry standard to cover this topic. “Committee D30 has published standards for damage resistance testing of composite laminates, namely ASTM D6264 and ASTM D7136, but does not have…, ASTM Committee D30 Next Meeting:, March 2-4, 2011, in conjunction with CMH17, Kansas City, Mo., Technical Contac, t: Adam Sawicki, Boeing Co., Philadelphia, Pa., Phone: 610-591-2807; adam.j.sawicki@boeing.com, ASTM Staff Contact:, Ashley Wiand, Phone: 610-832-9551; awiand@astm.org, ASTM PR Contact:, Barbara Schindler, Phone: 610-832-9603; bschindl@astm.org Release #8775
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Subcommittee D30.05 on Structural Test Methods has been developing a series of standards addressing polymer reinforced composite materials used in the repair and reinforcement of concrete buildings and other civil structures. The latest approved standard in this series addresses the tension testing of materials that are externally bonded to concrete and other structural materials for repair,…
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ASTM International Committee D30 on Composite Materials is co-sponsoring the 25 th Annual Technical Conference of the American Society for Composites, to be held Sept. 20-22, 2010, at the Dayton Marriot in Dayton, Ohio. Sponsored by the University of Dayton, the event will be held in conjunction with the 14 th U.S.-Japan Conference on Composite Materials. Papers for the conference are invited on…, ASTM Committee D30 Next Meeting:, April 21-22, 2010, St. Louis, Mo., Technical Contact:, Ronald Krueger, National Institute of Aerospace, Hampton, Va., Phone: 757-864-3482; rkrueger@nianet.org, ASTM Staff Contact:, Jennifer Rodgers , Phone: 610-832-9694; jrodgers@astm.org, ASTM PR Contact:, Barbara Schindler, Phone: 610-832-9603; bschindl@astm.org Release #8420/Nov2009
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Rapid hardening hydraulic cements are used in a variety of applications in which reduced cementitious contents are desired or early service is needed. Included among these applications are paving, construction, stucco, mortar and block. A newly approved ASTM International standard covering these cements, ASTM C1600/C1600M , Specification for Rapid Hardening Hydraulic Cement, has been developed by…, Type URH, —ultra rapid hardening, for use where ultra high early strength is desired;, Type VRH, —very rapid hardening, for use where very high early strength is desired;, Type MRH, —medium rapid hardening, for use where mid-range rapid hardening, high early strength is desired; and, Type GRH, —general rapid hardening, for use when the higher strength properties of Type VRH or a Type MRH cement is not required. “ASTM C1600 lists minimum requirements for compressive strength, setting time, shrinkage and soundness (autoclave expansion),” says Hicks. “Optional specifications for sulfate expansion, alkali silicate reactions with aggregates, heat of hydration and expansion in water are also…
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Polymer matrix composites are widely used in a variety of civil engineering projects, including highway construction and concrete pavements. ASTM Subcommittees D30.05 on Structural Test Methods and D30.06 on Interlaminar Properties are both working on proposed new standards that involve fiber reinforced polymer matrix composites. The subcommittees are under the jurisdiction of ASTM International…