![]() Although dry-stacked construction offers many benefits including speed of construction and minimal need for skilled labor, its use has been limited by lack of technical information. N2 - Dry-stacked masonry construction consists of individual units stacked directly without mortar at the bed and head joints. © 2016 American Society of Civil Engineers. Masonry units were donated by the Oldcastle Company. Testing was conducted at the National Brick Research Center of Clemson University in Anderson, South Carolina. They were assisted by technical stafffrom the Glenn Department of Civil Engineering, Danny Metz, Scott Black, and Sam Biemann. Glenn Department of Civil Engineering students Seth Adams, Luay Abo Alarab, Marcos Martinez, and Michael Stoner participated in specimen preparation and testing. The research was funded by the National Concrete Masonry Association (Project NCMA 2014.001). The authors acknowledge and thank the many organizations and individuals who contributed to the research presented in this paper. (2005) “Compressive Testing and Analysis of a Typical Straw Wall Plaster”, in Proceedings of Engineering Sustainability 2005 Conference, Pittsburgh, USA.T1 - Compressive strength of dry-stacked concrete masonry unit assemblies Ontario Straw Bale Building Coalition-OSBBC (2004) “Straw Bale Building: An Information Package for Building Officials in Ontario”, OSBBC, Spencerville, Ontario. (2003) “Structural Testing of Plasters for StrawBale Construction”, Ecological Building Network, accessed September 14, 2005. (2003) “In-Plane Cyclic Test of Plastered Straw Bale Wall Assemblies, Ecobuild Network”, accessed September 14, 2005.ĪSTM C 109 (1998) “Standard Test Method for Compressive Strength of Hydraulic Cement Mortars (Using 2-in of 50-mm Cube Specimens)”, Annual Book of ASTM Standards, Section 4-Construction, Volume 04.01-Cement lime Gypsum, West Conshohocken, PA.ĪSTM C 469 (2002) “Static Modulus of Elasticity and Poisson's Ratio of Concrete in Compression”, Annual Book of ASTM Standards, Section 4-Construction, Volume 04.02-Concrete and Aggregates, West Conshohocken, PA.ĪSTM D 422 (2002) “Standard Test Method for Particle-Size Analysis of Soils”, Annual Book of ASTMStandards, Section 4-Construction, Volume 04.08-Soil and Rock, West Conshohocken, PA.ĪSTM C 39 (2004) “Standard Test Method for Compressive Strength of Cylindrical Concrete Specimens”, Annual Book of ASTM Standards, Section 4-Construction, Volume 04.02-Concrete and Aggregates, West Conshohocken, PA. This process is experimental and the keywords may be updated as the learning algorithm improves.Īsh, C., Aschheim, M. ![]() These keywords were added by machine and not by the authors. Plaster made with soil was found to have greater strength than the plaster made with bagged clay or lime-cement plaster. As moisture content at the time of testing increased, both the strength and the stiffness decreased proportionally. As clay content increased, strength increased proportionally and stiffness was unaffected. As the drying time increased between 10 days and 18 days, strength was unaffected but modulus of elasticity increased proportionally. It was found that as initial moisture content increased, strength and modulus of elasticity was unaffected for the earthen plaster. Compressive testing was conducted on 50-mm plaster cubes and 100-mm by 200-mm plaster cylinders. Clayey silt soil, bagged ball clay and lime-cement are compared as plaster binders for straw-bale applications. This study investigated the importance of initial plaster moisture content, drying time, clay content and, moisture content at the time of testing. A better understanding of the parameters affecting earthen plaster strength is essential for safe and effective use of this building technique. Straw-bale construction is an emerging building method and many builders choose to plaster the straw bales with earthen plaster to reduce the embodied energy of the structure.
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