An acidic environment commonly found in peat soils or factory wastes will have an impact on the water contained in the soil. Acidic water brings a negative impact on the road pavement quality. In Indonesia, many roads use the rigid pavement in consideration to the length of plan, traffic load and minimization of damage to the cross road due to vehicle braking. As a concrete provider, chemical admixture as a mixed materials today is widely used with the reasons of workability, initial strength, as well as saving of material use. This research aims to determine the mixture and characteristics of new concrete from mixing using Sika-NN and Plastocrete and to figure out the optimization of rigid pavement durability. It used the laboratory experimental method and the concrete sample used was in the form of a 15x15x15-cm cube with the planned concrete quality of K-400 (33.2 MPa). A total of 18 concrete samples were immersed by means of normal pH water and H2SO4 acid solution at pH 1 ± 1 with 3 samples on each. They were then tested at the age of 3, 7, 14, 28, 60, and 90 days using the duplo method. However, prior to conduct the test, the samples would be left drying at an atmospheric temperature within 24 hours. In this research, the concrete durability was carried out using a resistivity meter to determine the resistivity (endurance of type), Ultrasonic Pulse Velocity Test (UPVT) to test the density, and a static compressive test. The results of the mixed design showed a reduction in the number of the coarse aggregate and cement uses at approximately 24% and 18% respectively purposely to increase the use of fine aggregate by 16.49% with an average setting time value of approximately 112 minutes. The test on concrete resistivity in the acid water marinade for 90 days produced a greater value than that of normal water. Both samples were included in the "good" criterion for the test on density, whereas, the concrete samples soaked in acid water decreased by almost 16% in the static compressive test.