Get Precast concrete: materials, manufacture, properties, and PDF
By Maurice Levitt
This basic treatise on precast concrete displays Maurice Levitt’s vast adventure within the development and as a researcher and advisor. It provides unique assurance of the topic from the material's homes via its manufacture and quality controls, and directly to expert themes resembling speeded up curing and use in cold and warm climates. It then seems to be on the homes of precast concrete and its functionality in situ earlier than protecting criteria and checking out after which the problems of completing, fix and jointing.
A wide selection of execs in either the civil engineering and general development sectors may still locate this a useful reference for its assistance at the variety of functional questions they could count on to come across. it is going to even be helpful for college students at graduate level.
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Additional resources for Precast concrete: materials, manufacture, properties, and usage
Lime bloom masking black pigmented wet-cast blocks. (b) Carbon black pigments have been discussed earlier but one consideration is the appearance of the mix which takes on an oily, viscous, low workability character even though none of these characteristics actually obtains. No more water should be added to these concretes or mortars than is necessary for the required preassessed workability. (c) Autoclaving generally has a lightening effect on the colour and some colours are not suitable for use at autoclaving temperatures; the manufacturers will advise on this matter.
The most popular admixture is the same as the cellulose used for wallpapering. The common basic chemical is methyl ethyl cellulose used as a 0·5–1·0% w/v solution in the gauging liquid for the mortar. Such mortars are virtually unaffected by dry high suction surfaces and stay workable Copyright Applied Science Publishers Ltd 1982 for a period up to about two hours even at temperatures as high as 40°C and at relative humidities down to 10%. 1 Vibrated reinforced and unreinforced concretes (reinforced units only if permitted by regulations).
In effect, this means an interim W/C with improved workability. 5 illustrates this effect. 5 TYPICAL EFFECT OF PLASTICISING ADMIXTURE ON PROPERTIES OF A VIBRATED CONCRETE PRODUCT The dosage rates vary from 100 to 1000 ml/50 kg cement and each type should be dispensed at the same time as the mixing water. As far as Copyright Applied Science Publishers Ltd 1982 selection is concerned, much of this appears to be a function of the grading of the fine aggregate. The coarser sand mixes benefit more with the lignines, whereas the finer dune sands work better with the carboxylic derivatives.
Precast concrete: materials, manufacture, properties, and usage by Maurice Levitt