METHOD FOR PRECAST CONCRETE AND REINFORCED CONCRETE BUILDING STRUCTURE PRODUCTION AND FOR CAST-IN-PLACE CONCRETE AND REINFORCED CONCRETE BUILDING STRUCTURE ERECTION

FIELD: building, particularly for concreting cast-in-place and precast reinforced concrete structures along with concrete curing temperature regulation. ^ SUBSTANCE: method involves laying and compacting concrete mix under continuous concrete mix curing temperature control; heating central concrete...

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Hauptverfasser:	ANTONOV EVGENIJ ARISTARKHOVICH, PASSEK VADIM VASIL'EVICH, STEFANOV KIRILL ALEKSANDROVICH, VELICHKO VLADIMIR PAVLOVICH, ZAKOVENKO VLADIMIR VASIL'EVICH
Format:	Patent
Sprache:	eng ; rus
Schlagworte:	ARTIFICIAL STONE BUILDING BUILDING IMPLEMENTS OR OTHER BUILDING AIDS, OR THEIRUSE CEMENTS CERAMICS CHEMISTRY COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS CONCRETE FIXED CONSTRUCTIONS FORMS HANDLING BUILDING MATERIALS ON THE SITE LIME, MAGNESIA METALLURGY PERFORMING OPERATIONS REFRACTORIES REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTINGBUILDINGS SCAFFOLDING SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG, OR MIXTURESCONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER SHUTTERING SLAG TRANSPORTING TREATMENT OF NATURAL STONE WORKING CEMENT, CLAY, OR STONE
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Beschreibung
Zusammenfassung:	FIELD: building, particularly for concreting cast-in-place and precast reinforced concrete structures along with concrete curing temperature regulation. ^ SUBSTANCE: method involves laying and compacting concrete mix under continuous concrete mix curing temperature control; heating central concrete layers with heating reinforcement when outer concrete layers are in elasto-plastic state. Heating reinforcement is spaced a distance "a" from surface. The heating is carried out simultaneously with surface heat-shielding. Distance "a" is determined as a=deltaeq(tav-ts)/(ts-ta), m, where deltaeq - thickness of conditional equivalent concrete layer corresponding to surface thermal resistance, Rs, m; tav - time-average concrete temperature calculated by estimated time of heating directly in heating area, deg; ts - time-average temperature at concrete surface calculated by estimated heating time, deg; deltaeq is determined as deltaeq=Rs.lambda.F, m, where Rs is heat resistance of rigging with form Rr including thermal resistance Ra of heat transfer from rigging to ambient air, h.deg/kcal; Rs=Rr+Ra=(deltar/( lambdar.F))+(1/(alpha.F)), h.deg/kcal, where deltar is thickness of rigging, m; lambdar is rigging heat conductivity factor kcal/(m.h.deg), alpha is rigging surface heat-transfer coefficient kcal/(m2.h.deg), lambda is concrete(reinforced concrete) heat conductivity kcal/(m.h.deg); F=1m2 - rigging surface area for thermal resistance calculation, m2. Amount of heat Q used to heat part of member to be heated having length (height) of 1.0 m and cross-sectional width of 1.0 m is determined from Q=(tav-ts)(m+(tau.lambda.F/a), where m is constant equal to 60-180 kcal/deg and tau is calculated heating time, hours. The heating reinforcement is heating wires or pipes adapted for hot water circulation. ^ EFFECT: reduced temperature stresses and prevention of crack formation during structure concreting, as well as possibility to regulate curing temperature. ^ 4 cl, 1 ex, 4 dwg