Download Concrete in Highway Engineering by D. Raymond Sharp, J. L. Raikes and D. J. Silverleaf (Auth.) PDF

By D. Raymond Sharp, J. L. Raikes and D. J. Silverleaf (Auth.)

Show description

Read Online or Download Concrete in Highway Engineering PDF

Similar materials & material science books

Corrosion of Polymers and Elastomers (Corrosion Engineering Handbook, Second Edition)

Corrosion of Polymers and Elastomers presents a close exam of the corrosive results of thermoplastic polymers, thermoset polymers, and elastomeric fabrics. The e-book is ideally suited for experts drawn to the corrosion resistance and mechanisms of those fabrics. Following a common advent to the composition, homes, and purposes of polymers, the booklet specializes in the consequences of chemical corrosion because of alterations in temperature, moisture, and different corrodents.

Magnesium, Magnesium Alloys, and Magnesium Composites

This e-book is the 1st to supply readers perception into the technological know-how, features, and purposes of present and futuristic magnesium-based fabrics, with specific emphasis positioned upon the houses of magnesium-based composites and the consequences of other kinds (metallic, ceramic, interconnected and intermetallic) of reinforcements from micron size scale to nanometric size scale at the houses of the consequent composites.

Phase Transformations in Multicomponent Melts

Bringing jointly the concerted efforts of the multicomponent fabrics neighborhood in a single decisive reference paintings, this guide covers all of the vital facets from basics to functions: thermodynamics, microscopic tactics, solidification, simulation and modeling. As such, it offers an essential knowing of soften and solidification tactics, treating all simulation strategies for non-stop and discrete structures, similar to molecular dynamics, Monte Carlo, and finite parts calculations.

Extra info for Concrete in Highway Engineering

Sample text

Modern small weighbatching plant is now freely available, either built into concrete mixers or as a separate piece of equipment. The water/cement ratio by weight should not exceed 0-55 for plain concrete to ensure satisfactory durability, but up to this limit the amount of water to be added is determined by the criterion of correct workability. Higher water/cement ratios can be used with air entrained concrete, (5) but a maximum of 0-60 is probably desirable. The workability of the concrete must be high enough to ensure that a fully compacted material is obtained and to give a smooth surface 50 Concrete in Highway Engineering finish on the slab surface.

It is not always essential to compact the two layers of concrete separately but two-layer compaction is usually necessary in slabs 9 in. or more thick. Finishing should be carried out continuously over as long a length of concrete as possible. Mechanically driven vibrators can be used for finishing the surface as well as for compaction. The finishing pass should be made soon after the compacting operation and the beam should be tilted slightly so that the leading edge is about f in. higher than the trailing edge to facilitate the striking off of any small quantities of excess concrete.

1 3 . Lowering the water table level by installing drains. If the seepage zone is wide, it is generally possible to keep the seepage water about 4 ft below formation level by constructing intercepting drains. A high water table can also be lowered by the installation of a drainage system (Fig. 13). The actual spacing and depths of drains will depend on the soil conditions and width of the formation. For example, in the case of dual carriageways, drains may be necessary under the central reservation as well as under the edges of the formation.

Download PDF sample

Rated 4.77 of 5 – based on 3 votes