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This Q&A focuses on comparison of a level straightedge used when performing ASTM E1155 or ASTM E1486 testing versus a manual straightedge used in the manual straightedge method described in ACI 117-10(15). Additional information on requirements related to performing the manual straightedge method is also provided.
Available in the following language(s): Spanish
When used properly, product samples can inspire and motivate an owner or decision-maker to choose a construction team and its products. Effective samples can tell the story of the substrate being addressed, the systems as they will be installed, and the anticipated finished outcome of the proposed project. They can also demonstrate the team’s craftsmanship and attention to detail.
Available in the following language(s): Spanish
Currently, about 50% of all ready mixed concrete in the United States is produced using Type IL cement. However, in comparison to mixtures with Type I/II cement, there is a lack of information concerning constructability with such mixtures. To create a knowledge base, with a grant from the ACI Foundation, the American Society of Concrete Contractors and Giatec Scientific Inc. are collecting design characteristics of well-performing mixtures with Type IL cement for interior, non-air-entrained concrete floor slabs.
Available in the following language(s): Spanish
A significant effect of warming due to global climate change that goes unnoticed is the increased rate of deterioration of concrete structures. In this study, experimental trends and theoretical models were used to estimate the impact of changes in service temperatures and precipitation on aging behavior of concrete and resulting lifetime of infrastructure throughout the United States.
Available in the following language(s): Spanish
Efforts to optimize current materials and processes, and to develop new cementitious materials and technologies that can meet specific reduction criteria are underway in industry, government, and academia. Validating claims of reduced embodied carbon relies on demonstrating, quantitatively and accurately with known uncertainty, that a material or process meets these criteria.
Available in the following language(s): Spanish