Concrete and Concrete Aggregates Standard addresses bleed stability.
Press Release Summary:
Proposed standard ASTM WK28156, Test Method for Bleed Stability of Cementitious Grout Under Static Pressure, is under jurisdiction of ASTM International Subcommittee C09.41 on Hydraulic Cement Grouts. According to Fred Goodwin, fellow scientist, BASF Construction Chemicals, and incoming chair of C09.41, this standard "uses less material, produces quantitative comparative results, is much faster than existing methods and is usable in both laboratory and field conditions."
Original Press Release:
ASTM Concrete Committee Developing Proposed Standard to Address Bleed Stability
W. CONSHOHOCKEN, Pa.-ASTM International Committee C09 on Concrete and Concrete Aggregates is currently developing a proposed standard that addresses bleed stability. ASTM WK28156, Test Method for Bleed Stability of Cementitious Grout Under Static Pressure, is under the jurisdiction of ASTM International Subcommittee C09.41 on Hydraulic Cement Grouts.
When cementitious grouts bleed, mixing water separates from the binder, causing a number of problems. Bleed water will allow corrosion to occur in stressed steel strand, which is what holds a building together. Sufficient corrosion can result in catastrophic failure. In addition, trapped bleed water can cause spalling of the encasement concrete for the P-T duct and can result in misalignment of base plates and costly bearing and equipment failure.
"The proposed ASTM standard uses less material, produces quantitative comparative results, is much faster than existing methods and is usable in both laboratory and field conditions," says Fred Goodwin, fellow scientist, BASF Construction Chemicals, and the incoming chair of C09.41. Specifiers, grouting contractors, material suppliers and testing laboratories will be the most likely users of ASTM WK28156 once it has been approved, according to Goodwin.
All interested parties are welcome to participate in the ongoing development of ASTM WK28156, particularly in the realm of interlaboratory testing for the proposed standard.
ASTM International welcomes and encourages participation in the development of its standards. For more information on becoming an ASTM member, visit http://www.astm.org/JOIN.
ASTM International is one of the largest international standards development and delivery systems in the world. ASTM International meets the World Trade Organization (WTO) principles for the development of international standards: coherence, consensus, development dimension, effectiveness, impartiality, openness, relevance and transparency. ASTM standards are accepted and used in research and development, product testing, quality systems and commercial transactions.
ASTM Committee C09 Next Meeting: Dec. 6-8, December Committee Week, New Orleans, La.
Technical Contact: Fred Goodwin, BASF Construction Chemicals, Cleveland, Ohio, Phone: 216-839-7009; fred.goodwin@basf.com
