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Content DescriptionThis guide describes adjustments that can be made to existing proportions for normal-density concrete with and without chemical admixtures, pozzolans, and slag. These adjustments are based on the performance of the concrete mixture as used in construction. The adjustments consider evaluation for placeability, consistency, strength, and durability. The procedures used in making these adjustments can be found in ACI 211.1. Adjustments to concrete mixture proportions or sources may require resubmittal to the design professional as detailed in ACI 301. This guide also provides information regarding jobsite conditions and testing practices that should be evaluated before adjustments are made to the mixture. Keywords: admixtures; aggregates; cementitious materials; durability; fine aggregates; fly ash; metakaolin; mixture proportioning; pozzolans; quality; silica fume; slag; slag cement; slump tests; water-cementitious material ratio.
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Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development and distribution of consensus-based standards, technical resources, educational & training programs, certification programs, and proven expertise for individuals and organizations involved in concrete design, construction, and materials, who share a commitment to pursuing the best use of concrete. ACI has over 95 chapters, 110 student chapters, and nearly 20,000 members spanning over 120 countries.
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