Development of Ultra High Performance Concrete Using Statistical Approach and Particle Packing Approach

The water to binder ratio (W/B) and the superplasticizer to binder ratio (SP/B) have a significant impact on the UHPC design mix. A good design mix should exhibit a balance between fresh and hardened concrete properties. The normal concrete design mix is not pertinent to UHPC. The majority of the UHPC design mixtures available in the literature do not provide conclusive results. The large variation among the UHPC properties in literature points toward the UHPC material dependency. The present research investigated the strength and flowability of UHPC using Design of experiments (DOE), a well-known statistical method that ensures reliable results with little effort, time, and resources. The W/B ratio and SP/B ratio were chosen as variable factors in this research work. Based on variable parameters, a model with a strong correlation coefficient has been created. The compressive strength model exhibits curvature, while the workability model has a linear relationship, according to the statistical analysis of the experimental findings. The contour plots have been supplied to make the model easier to use. The compressive strength of the produced UHPC mixes ranges from 102 to 138 MPa, and the flow varies from 165 to 297 mm. As a result, UHPC with the requisite strength and workability may be created depending on the requirements for various applications in the Industry.