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Erschienen in:
2019 | OriginalPaper | Buchkapitel
6. Incorrect Selection of Constituent Materials
verfasst von : Akhtar Surahyo
Erschienen in: Concrete Construction
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Abstract
The properties of concrete depend on the quantities and qualities of its constituent materials. Constituent materials used should satisfy structural performance and durability of the finished structure. Constituent materials used to produce a concrete mix should be selected to meet the environmental or soil conditions, where the concrete is to be placed. Selecting appropriate materials of suitable composition and processing them correctly are therefore essential to achieve concrete resistance to deleterious effects of water, aggressive solutions, reactive aggregates, extremes of weather conditions, etc.
For different requirements, such as hot and cold weather concrete, fire-resistant concrete, lightweight concrete, and concrete exposed to sulphates, chlorides, etc. different types of constituent materials are to be used. This chapter describes how to select the type of cement, aggregate, and admixture including mixing and curing water properly so as to obtain appropriate and economical concrete with required properties. The effects of some of the impurities in water on the properties of concrete are also discussed in this chapter.