P Domone

Construction materials : their nature and behaviour

Part 1 Fundamentals: states of matter energy and equilibrium atomic structure and interatomic bonding elasticity and plasticity surfaces fracture and fatigue electrical and thermal conductivity. Part 2 Metals and alloys: physical metallurgy mechanical properties of metals forming of metals oxidation and corrosion metals, their differences and uses. Part 3 Concrete: introduction portland cements admixtures cement replacement materials aggregates for concrete properties of fresh concrete early age properties of concrete deformation of concrete strength and failure of concrete concrete mix design non-destructive testing of hardened concrete durability of concrete high performance concrete. Part 4 Bituminous materials: introduction structure of bituminous materials viscosity and deformation of bituminous materials strength and failure of bituminous materials durability of bituminous materials practice and processing of bituminous materials. Part 5 Brickwork and blockwork: introduction materials and components for brickwork and blockwork masonry construction and forms structural behaviour and movement of masonry durability and non-structural properties of masonry. Part 6 Polymers: introduction polymers - types, properties and applications. Part 7 Fibre composites: introduction polymer composites introduction fibres for polymer composites analysis of the behaviour of polymer composites manufacturing techniques for polymer composites uses of polymer composites fibre reinforced cements and concrete properties of fibre and matrices structure and post-cracking composite theory fibre reinforced cements fibre reinforced concrete. Part 8 Timber: introduction structure of timber and the presence of moisture deformation in timber strength and failure in timber durability of timber processing of timber.

Testing of binders for high performance concrete

Powders for binders for high performance concrete have been investigated using a simple flow spread test. Test on pastes made with individual powders at increasing water content give two parameters; the retained water ratio and the deformation coefficient. Values of these for powder mixtures can be obtained by a simple law of mixtures. Values of yield stress and plastic viscosity from concentric cylinder tests are shown to be related to the flow spread test results, which gives confidence for their use in selection of the constituents and materials for high performance concrete.

The slump flow test for high-workability concrete

Despite their inherent limitations, single-point workability tests continue to be used for the specification and quality control of concrete. The development of stable, high-workability mixes with a collapsed slump has led to the use of the flow test, more popular in Europe, and the slump flow test, used extensively in Asia. Results are given from a laboratory programme in which these two tests, and slump, were used on a range of concrete mixes. A good correlation between the flow and slump flow values was obtained. It is argued that the tests are therefore of equal value in assessing concrete properties, and hence the simpler and more convenient slump flow test is to be preferred.

The properties of low strength silicate/portland cement grouts

Abstract Sodium silicate - sea water - Portland cement grouts at high water/cement ratios (between 2 and 3) have been used for a number of years for void filling in the foundations of offshore concrete gravity platforms. Some of the initial development work on the grouts is briefly reviewed, and the results of an investigation into their long term properties are presented. It is shown that the grouts obey similar strength vs water/cement ratio laws to conventional structural grouts and concretes, but that unconfined swelling may lead to some long term degradation. An examination of the swelling mechanism may be of use in the study of alkali - silica reaction in concrete.