Physical Properties of Concrete and Concrete Constituents by Jean?Pierre Ollivier, Jean?Michel Torrenti, Myriam

By Jean?Pierre Ollivier, Jean?Michel Torrenti, Myriam Carcasses(auth.)

Understanding the rheological homes of unpolluted concrete, the hydration phenomenon of cement answerable for structuration, the connection among the features of the porous good bought and its mechanical performances or resistance to the competitive penetration calls for a posh wisdom of the physicochemistry of reactive porous fabrics. the advance of easy formula ideas for this reason calls for the assimilation of this information and a very good command of the homes of those materials.
The function of this ebook is to supply the combination clothier with beneficial wisdom on granular fabrics and porous fabrics, with the intention to allow the cutting edge layout of concrete. subject matters lined comprise the characterization of granular fabrics, the techniques of porosity and particular floor quarter, and the shipping homes (diffusion and permeation) of concrete. a few of these issues are already lined in different basic books devoted to granular or porous fabrics. the target here's to carry them jointly in a single booklet via adapting them to be used via concrete specialists.
Applications within the type of routines are provided on the finish of every bankruptcy to allow readers to assimilate the theoretical wisdom and to use such wisdom to concrete difficulties encountered in civil engineering.

Contents

1. Description of Granular fabrics, Definitions.
2. Granulometry.
3. particular floor sector of Materials.
4. Voids in Granular fabrics and the association of Grains.
5. Voids in Concrete.
6. the basics of Diffusion.
7. Permeability.

Content:
Chapter 1 Description of Granular fabrics, Definitions (pages 1–18):
Chapter 2 Granulometry (pages 19–54):
Chapter three particular floor zone of fabrics (pages 55–86):
Chapter four Voids in Granular fabrics and the association of Grains (pages 87–127):
Chapter five Voids in Concrete (pages 129–194):
Chapter 6 the basics of Diffusion (pages 195–277):
Chapter 7 Permeability (pages 279–332):

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Extra info for Physical Properties of Concrete and Concrete Constituents

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3). The results are very different from those expressed in percentages by weight. dn-1 . In a logarithmic scale, the distance between the two markers dn and dn-1 is proportional to Ln dn -Ln dn-1 = Ln r . This term is a constant and the openings of the sieves are therefore equidistant. 4. 5. 5. 3. Efficiency of sieving For a grain to pass through a mesh, it must be smaller than the opening but it must also present itself at the opening and this opening must be free (and therefore not a clogged sieve).

A tubular glass is immersed in the suspension with a calibrated inlet (3) and two platinum electrodes (1) are placed on either side of the chamber, which is powered by direct current. The suspension is sucked into the tube through the calibrated inlet. When a particle passes through the inlet, it displaces its own electrolyte volume, thus changing its electrical resistance through the inlet. This change in resistance is converted into a pulse whose amplitude depends on the volume of the particle.

By repeating the measurement at different times, granulometric analysis of the material can be carried out. 9. 4. - the densimeter (or hydrometer) is a device consisting of a glass tube on top of a tank that allows us to measure the density of a liquid relative to water. Immersed in water, the tube is submerged to a depth hwater. When it is immersed in a liquid, the depth of the immersion is hl. If Vr is the volume of the reservoir, P the weight of the densimeter and s the section of the glass tube, it can be written that: – case of water: P = ( hwater s + Vr )ρwater g ; and – case of liquid: P = ( hl s + Vr )ρl = ([ hwater + Δ h]s + Vr )ρl .

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