What is BS 1881-211 - Petrographic examination of hardened concrete about?
BS 1881-211 is a British standard on concrete production and testing that gives a method for the petrographic examination of hardened concrete.
BS 1881-211 is the 211th part of the BS 1881 series of documents that describes procedures and terminology for the examination of hardened concrete and mortar. The procedures are intended to be performed by an appropriately qualified or experienced concrete petrographer.
The principal application of the method described requires the use of a polarizing petrological microscope for the examination of concretes containing Portland and other cement.
Note 1: The petrographic procedures outlined are applicable to the examination of samples of all types of hardened hydraulic cement-based materials, including concrete, mortar, grout, cement and gypsum-based plaster, render, terrazzo, and similar materials.
Note 2: In BS 1881-211, the material for examination is designated as “concrete”, even though the commentary is also applicable to the other mixtures unless the reference specifically excludes a material other than concrete.
Who is BS 1881-211 - Petrographic examination of hardened concrete for?
BS 1881-211 on concrete testing is useful for:
- Builders
- Architects and interior designers
- Manufacturers of concrete
- Concrete petrographer
- Manufacturers of gypsum-based products
Why should you use BS 1881-211 - Petrographic examination of hardened concrete?
A petrographical examination is important to highlight features within the concrete that might already, or might later, influence the behaviour of the material under service conditions.
BS 1881-211 navigates you through the apparatus requirements for the petrographic examination of concrete samples.
Sampling and preparation of test specimens are mentioned in BS 1881-211 for deterioration investigations.
BS 1881-211 specifies the preparation procedure of thin and polished thin sections of the specimen of concrete.
Preliminary examination and microscopic examination of the specimen is determined by BS 1881-211 which is recorded using photographs and drawings to appropriate scales.
BS 1881-211 provides the methods and petrographic assessment for the estimation of the original water to cement ratio of concrete.
BS 1881-211 gives the details on the petrographic estimation of mix proportions used to measure the composition of concrete containing coarse aggregate.
BS 1881-211 can be used to determine the report preparation of the petrographical examination on the concrete specimen.
Overall, BS 1881-211 guides you through the petrographic analysis of concrete to evaluate the integrity of concrete and understand the mineralogy of materials.
In this manner, a petrographic exam of the aggregate in hardened concrete will identify the aggregate type, size, shape, and amount to determine if it is within the design specifications.