Abstract
This article presents the influence of dry hot climate on properties of concrete mix and concrete generally during its production and delivery to construction site. Dry hot climate causes significant water evaporation (i.e. dehydration) of concrete during its setting which can lead to formation of cracks and other deformations of concrete [1÷5]. This experimental research investigating impact of additives on saving workability of concrete mix and on strength of hardened concrete can help in preventing such problems. It was experimentally proved that concrete without additives has significantly lower consistency. A variety of air-entraining additives, superplasticizers, and hyperplasticizers used for preventing loss of mixing water was checked for influence on consistency of concrete mix at high temperature. MC-Techniflow 70 taken as efficient additive is applied in amount of 1,2 % from cement mass, it helps to save workability of concrete mix longer and provides high strength both in 14 days – 29,2 MPa and in brand age of hardening – 35,0 MPa.
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