ACI 211.2-98 (R2004) PDF Download
Standard EN Sample
Standard Practice for Selecting Proportions for Structural Lightweight Concrete
Also Known As:
ACI 211.2-98 (R2004) is a standard practice that provides methods and guidelines for selecting proportions for structural lightweight concrete. The standard focuses on concrete containing lightweight aggregates and offers two methods for proportioning and adjusting the proportions of the concrete.
The first method, called the weight method, uses a specific gravity factor determined by a displacement pycnometer test on the aggregates. This method calculates the weight per yard of the fresh cement using the specific gravity factor. The weight method is useful for estimating the weight of the concrete.
The second method, known as the samp, loose volume method, utilizes the cement content-strength relationship for designing lightweight and sand lightweight concretes. This method involves systematic calculation of batch weights, effective displaced volumes, and adjustments to compensate for changes in aggregate moisture content, aggregate proportions, cement content, slump, or air content.
The standard provides examples and explanations to aid in the understanding and application of the methods outlined. These examples showcase the systematic calculation process and demonstrate how to adjust proportions based on various factors.
| Descriptors | absorption; adsorption; air content; air entrainment; cement content; coarse aggregate; fine aggregate; fineness modulus; grading; lightweight aggregate; mixture proportioning; moisture; slump test; specific gravity factor |
| Language(s) | English |
| File Size | 542.7 KB |
