Concrete is manufactured from various things in the factory or on the site Components: cement, water and different granular materials such as sand, gravel and various mineral additions. It can also bean admixture intended to modify its properties from its fresh state (e.g., delayed or accelerated admixtures, super plastics), or its cured state (e.g., properties introduced in the air chain). The materials are varied.
They are concerned both through their abilities and in their fresh state
It is transported and poured in a form that is more or less fluid, as well as in its hardened state. Properties include performance, e.g. mechanical resistance, resistance to aggressive environments, and acoustic or thermalinsulation. The formulation of concrete consists in finding the components and their proportions to meet certain requirements, but this can be very different.
All this should be done in mind that concrete is a widely used material, the cost of which should be limited, prepared and carried out on site in various environmental conditions.
Understanding the rheological properties of fresh concrete, the hydration phenomena of cement responsible for structuring, and the relationship between the properties of the resulting porous solid and its mechanical performance or resistance to aggressive penetration requires complex knowledge of the physical chemistry of reactive porous materials.
Therefore, the development of simple formulation rules requires the assimilation of this knowledge and a good command of the properties of these materials.
The purpose of this book is to provide “mix designers” with useful knowledge of granular and porous materials that enable innovative design of concrete. Topics covered include characterization of granular materials, concepts of porosity and specific surface area, and transport properties of concrete (diffusion and transmission). Some of these topics are already covered in other popular books dedicated to granular or porous materials. The aim here is to put them together in one book by adapting them for use by specific professionals.
At the end of each chapter, simulations are provided in the form of exercises so that you can absorb theoretical knowledge and apply that knowledge to specific problems encountered in civil engineering.