Effect of additive compounds on concrete used for the construction of hydraulic structures

Abstract

    This paper presents the effect of additive compounds on concrete used for the construction of hydraulic structures. The results showed that the use of fly ash replacing 10% of cement content has diminished both slump value and compressive strength of concrete. Yet, the application of superplasticizer with 0.8 liters per 100 kg cement and/or of waterproofing admixture with 0.4 liters per 100 kg have increased essentially both slump value and compressive strength. The binary additive compounds of fly ash and superplasticizer have improved either slump value or compressive strength, even though cement content was 10% less than conventional. In term of waterproof grade, the use of superplasticizer, waterproofing admixture, or fly ash and superplasticizer has resulted in the enhancement of waterproofing grade from W6 to W8. Moreover, the grade W10 has been attained in the concrete mix with superplasticizer and waterproofing admixture usage and in the mix with the trinary compounds of fly ash, superplasticizer and waterproofing admixture.