Today new applications of admixtures have been brought into the market for the production of high strength and flowing concretes, in this research, the chemical admixture used in sulfate resistance concrete is a superplasticizer. Superplasticizers (SP) is commonly known as High Range Water Reducers because it permits a low water-cement ratio, as well as workability, is also affected. In this study, sulfate resisting Portland cement (SRC) and one family of superplasticizers have been used which is sulfonated naphthalene formaldehyde (SNF) condensate and their effect on properties of fresh and hardened concrete has been studied and the properties of concrete inspected are slump test, setting time and compressive strength and slump test.
In this experimental works, we are comparing the properties of superplasticizer-based concrete with that of without SP added to concrete, which is used at amounts 700ml/100kg, 1000ml/100kg, 1500ml/100 kg, 2000ml/100kg, and 2500ml/100kg of cement were prepared at constant water to cement (w/c) ratio of 0.54% and a variable of w/c ratio the study the effect of the SP on the properties of concrete and to determine the optimum dosage of SP in concrete to improve the properties of concrete.
The results revealed that the effect of admixture on properties of concrete is dependent upon its dosage which, workability, setting time, and compressive strength were increased by adding SP compared with concrete without SP.