Concrete, properties

C = Faults giving disordered layers O = Physically adsorbed water X = Interlayer hydrate water 

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Akroyd, T. N. W. (1962), Concrete Properties and Manufacture, Pergamon, Oxford. 

Mix Type of Mixture proportions and Series concrete properties of fresh concrete... 

The ions must not interfere with or modify the hydration reaction so that the concrete properties are not adversely affected. 

Although the mix design of latex-modified mortar and concrete is done in much the same way as that of ordinary mortar and concrete, properties such as workability, strength, extendibihty, adhesion, watertightness and chemical resistance are controlled by the polymer-cement ratio rather... 

It is important to understand admixture-cement and also admixture- admixture interactions so that optimum use of these materials can be made, admixture-cement incompatibility can be prevented, better troubleshooting of field problems is enabled, and the prediction of concrete properties is made possible. In the following pages some examples of problems that arise from admixture-cement and admixture-admixture interactions are cited, and an outline of the physicochemical concepts involved in the interference with cement hydration and interparticle interactions that limit admixture performance, and cause incompatibility and field problems is presented. 

Abstract A fully coupled model of hygro-thermo-chemo-mechanical phenomena in concrete is presented. A mechanistic approach has been used to obtain the governing equations, by means of the hybrid mixture theory. The final equations are written in terms of the chosen primary and internal variables. The model takes into account coupling between hygral, thermal, chemical phenomena (hydration or dehydration), and material deformations, as well as changes of concrete properties, caused by these processes, e.g. porosity, permeability, stress-strain relation, etc. 

We have covered a great deal of territory. We discussed the nature of chemistry, the structure of atoms and chemical compounds, and the properties of elements as reflected in the periodic table. We explored fundamental classes of chemical reactions such as redox reactions, acid-base reactions, and displacement reactions. We laid out the theory that describes the nature of the chemical bond and the principles of chemical reactions. We discussed the practical considerations of intermolecular forces and concentration and considered the rarefied properties and reactions of gases. We contrasted the slippery properties of solutions with the concrete properties of solids. We delved into thermo-... 

RILEM Technical Recommendations for the Testing and Use of Construction Materials Autoclaved Aerated Concrete—Properties, Testing and Design... 

One of the basic ideas is the distinction of two directions with respect to what is modeled and how it is modeled (cf. Fig. 5.56). This results in different views concerning on one hand the static/djmamic (horizontal) and on the other hand the logical/concrete properties (vertical) dimension. 

FIGURE 1.3 Most common aggregate systems used in PC. (From V. Y. Garas and C. Vipulanandan, Review of Polyester Polymer Concrete Properties, http //www2.egr. uh.edu/ civebl/CIGMAT/03 poster/ll.pdf.)... 

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