Strength and durability assessment of high performance concrete

High performance concrete is a complex system of materials that can survive in a severe environment for the entire life of the structure. In order to achieve durable concrete that would last over a period of 75 to 100 years, the research carry out the assessment of the strength and durability performance of HPC, based on measurable concrete properties and environmental exposure conditions, that ensures concrete durability and long-term performance.; After extensive review of most relevant studies related to development, strength and durability of high performance concrete, raw materials were evaluated and two HPC-Mixes were developed; strength assessment and durability assessment were carried out. The fresh concrete properties of both concrete mixes (Mix #1 and Mix #2) were excellent in terms of workability, slump, air content and unit weight.; A total of fourteen concrete mixes were cast at two precast and four ready-mix concrete plants. These mixes were tested for compressive strength, modulus of elasticity, flexural strength, petrographic examination, shrinkage, coulomb permeability, chloride ion penetration (titration, direct ion test, and RCT). The purpose of testing was to evaluate HPC mixes performance, properties, and durability. Summarized and comparison results of this testing program are represented in tables, graphs, and charts.; In order to achieve higher strength at early age it becomes necessary to use steam or heat curing. The concrete samples were subjected to heat curing (precast concrete segments) and moist curing (cast-in-place concrete) the effect of curing on the strength and durability of high performance concrete were studied. Mathematical prediction model used to predict and quantify the deterioration of concrete are covered. The models that are included cover predictions of reinforcement corrosion (initiation of corrosion in terms of chloride ingress corrosion process). The state-of-the-art in predicting service life with a time-to-corrosion model based on Fick's Second Law of Diffusion are described, and outlines further work that needs to be accomplished before such a model can be applied effectively.