How to Select the Construction Plant?

construction plant

Selection of the Construction Plant The selection of plant is usually straightforward but the following points are relevant.  1- Cost a- Hire rate Take all factors into account if you are offered alternatives. What are the extras to the basic rate? For operated plant, these can include overtime, bonus and subsistence. Are fuel and lubricants included …

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Concrete in Compression (ACI 318)

Concrete in Compression It is generally accepted that the behavior of a reinforced concrete member under load depends on the stress–strain relationship of the materials, as well as the type of stress to which it is subjected. With concrete used principally in compression, the compressive stress–strain curve is of primary interest. The compressive strength of concrete …

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Concrete in Tension: Tensile Strength of Concrete

Concrete in Tension: Tensile Strength of Concrete The tensile and compressive strengths of concrete are not proportional, and an increase in compressive strength is accompanied by an appreciably smaller percentage increase in tensile strength. According to the ACI Code Commentary, the tensile strength of normal-weight concrete in flexure is about 10% to 15% of the …

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Structural Design and Limit States

limit state design

Structural Design and Limit States Aims and methods of design Codes state that the aim of design is the achievement of an acceptable probability that the structure will perform satisfactorily during its life. It must carry the loads safely, not deform excessively and have adequate durability and resistance to effects of misuse and fire. Codes recognize …

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Compacting Factor Test

Compacting Factor Test

There is no generally accepted method of directly measuring the amount of work necessary to achieve full compaction, which is a definition of workability. Probably the best test yet available uses the inverse approach: the degree of compaction achieved by a standard amount of work is determined. The work applied includes perforce the work done …

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Flow Table Test

Flow table test

Flow Table Test This test was covered by BS 1881 : 105 : 1984. The test is appropriate for concrete of high and very high workability, including flowing concrete which would exhibit a collapse slump. The apparatus consists essentially of a wooden board covered by a steel plate with a total mass of 16 kg. …

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Cement Manufacturing Process

cement manufacture process

Cement Manufacturing Process History of Cement: Cement is a material which is highly compatible to the earth’s eco-system and most adaptable to sustainable development. Cement is a fine powder which sets after a few hours when mixed with water, and then hardens into a solid, strong material. Cement is mainly used to bind fine sand …

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