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pp. 12803-12809 | Article Number: ijese.2016.952
Published Online: October 19, 2016
Abstract
The paper presents the issues considering fuzzy logic application in the procedure of concrete thermal treatment using shuttering with heating elements, the schemes and methods of control. The fuzzy associations matrix made up of 25 rules was developed for this controlling system on the basis of general engineering judgments. The paper demonstrates the results of testing two types of regulators - with the proportional plus integral control law and with the fuzzy logic. The shields and the panels of shuttering with heating elements were determined to be carefully torn after the thermal treatment with the help of hand screws or cranes and specialized detachable device. After removing the termo shuttering the concrete is held under the coat, tarpaulin or inventory inclosure. Herewith it is necessary to avoid severe cooling, which may cause large thermal stress within the concrete and its alligatoring. It is simplicity and technological reliability that points out the method of concrete treatment in shuttering with heating elements. The shuttering can be used almost at any frosts. Moreover, it saves the metal when producing electrodes, the modes of shuttering are easily regulated and the concrete temperature may be automatically controlled through special settings. To conclude, it is necessary to point that the fuzzy control principle ensures the management sustainability at sudden changes in the dynamic parameters of the controlled object. The concrete thermal treatment by means of heating shields does not impose any specific requirements to the concrete structure and materials during its production. The concrete electro termo shuttering shall be applied both in winter and in summer in order to accelerate its hardening and acquiring necessary strength, which is of a great importance in cast-in-place construction, when the intensification of the hardening process imposes significantly the total construction time limit. Each covering is equipped with a cable entry with plug-in connector, designed for the maximum calculation value of the electric heaters current. The specific direct-current resistance of the applied carbon electric materials determines the ways of connecting electric heaters into one- or three-phase circuit and also the coatings linear dimensions.
Keywords: Fuzzy logic; concrete thermal treatment; automatic control; strategic management; formation dynamics; structure formation; enterprise informatization.
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