2 selecting proportions for normal-density and high-density concrete—guide (aci prc-211.1-22) increased resistance to alkali-aggregate reaction and sulfate attack (ACI 225R and ACI 233R), reduced heat of hydra-

trusion of aggressive solutions (See ACI 225R and ACI 226.1R). 2.2. The selection of concrete proportions involves a balance between economy and requirements for placeability, strength, durability, density, and appearance. The required characteristics are governed by the use to which the concrete will be put and by conditions expected to be ...

This guide to concrete proportioning provides background information on, and a procedure for, selecting and adjusting concrete mixture proportions. It applies to normal-density concrete, both with and without chemical admixtures, supplementary cementitious materials, or both.

Most structural lightweight aggregate concrete mixture propor-tions are reported in the oven-dry condition. However, in the field they are not SSD, but in a damp or wet condition. This condition is usually achieved by sprinkling, soaking, ther-mal quenching, or vacuum saturation.

Standard Practice for Selecting Proportions for Normal Heavyweight, and Mass Concrete (ACI 211.1-91) Reapproved 1997 Reported by ACI Committee 211 Alexandrina Aragón Describes, with examples, two methods for selecting and adjusting proportions for normal weight concrete, both with and without chemical admixtures poz-zolanic, and slag materials.

Order information: ACI documents are available in print, by download, on CD-ROM, through electronic subscription, or reprint and may be obtained by contacting ACI. Most ACI standards and committee reports are gathered together in the annually revised ACI Manual of Concrete Practice (MCP). American Concrete Institute 38800 Country Club Drive

1991年1月1日 · Standard Practice for Selecting Proportions for Normal, Heavyweight, and Mass Concrete. This Standard Practice describes methods for selecting proportions for hydraulic cement concrete made with and without other cementitious materials and chemical admixtures.