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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Aggregate--The Decisiveelement in the Frost Resistance of Concrete
Author(s): G. V. Teodoru
Publication: Special Publication
Appears on pages(s): 1297-1310
Keywords: aggregates; compressive strength; concrete durability; freeze-thaw durability; tensile strength; General
Abstract:The frost resistance of concrete is considerably influenced by aggregate. The aggregate must meet the conditions that are required in different specifications in regard to their mineralogical composition, grading curve, limit of fine particles, resistance to degradation (method with sodium sulfate), etc. The existing laboratory methods for testing the frost resistance of aggregates can only show the relative frost resistance of these; they cannot predict the performance of concrete made from these aggregates. It is necessary to test the response of concrete made from these aggregates to cycles of freezing. Experimentation was done to determine the influence of mineralogical structure, physical-chemical properties of aggregate, and their granulometric composition (especially the fine fraction). The influence of cement type and content and of admixture on the resistance of concrete to freezing was included. Investigations were done using measurements of the logarithmic decrement from the resonance curve as well as from the decay curve of the free vibrations. For comparison, the dynamic modulus of elasticity variation and the variations of strength in compression and tensile of concrete were used. The value of the logarithmic decrement is given, above which value the concrete is not resistant to frost damage.
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