Effect of coarse aggregate on elastic modulus and compressive strength of high performance concrete

A set of high performance concrete mixes, of low water cement ratio and fixed mortar composition, containing six different types of aggregates of constant volume fraction, has been used to check moduli of elasticity at 7, 28 and 91 days. The results have shown that, apart from the aggregates of very...

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Bibliographic Details
Published in:Cement and concrete research 1995, Vol.25 (1), p.177-186
Main Authors: Zhou, F.P., Lydon, F.D., Barr, B.I.G.
Format: Article
Language:English
Subjects:
Aggregates and other concrete constituents
Applied sciences
Buildings. Public works
Cement concrete constituents
Exact sciences and technology
Materials
Natural aggregates
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Summary:A set of high performance concrete mixes, of low water cement ratio and fixed mortar composition, containing six different types of aggregates of constant volume fraction, has been used to check moduli of elasticity at 7, 28 and 91 days. The results have shown that, apart from the aggregates of very low and very high modulus, concrete modulus at 28 days can be predicted quite well by well-known models. Increase in modulus thereafter is slight. Cube strength (about 90 N/mm 2 at 28 days with normal aggregates) is drastically reduced, as expected, by the weaker aggregates and is also reduced (by about 9%) by the stiffer (steel) aggregates.
ISSN:0008-8846
1873-3948
DOI:10.1016/0008-8846(94)00125-I