The Construction Technology Of CRFG Office Buildint Raft Board Mass Concrete Temoerature Contraction Crack Control

This article take a iron game of CRFG office block raft board mass concrete temperature contraction crack control as object of study, concrete has the crack primary cause in view of the raft board great volume is the temperature stress and thermal distortion this characteristic, the key research raft board mass concrete interior maximum temperature and the surface temperature theoretical calculation result and the actual temperature measurement result difference, the discussion prevented the raft board mass concrete appears the temperature contraction crack the construction technology, provides the practical and feasible experience.First, this article take the existing theory as a foundation, roughly accumulates four reasons in view of the raft board which the coagulation local product seams, from the proportioning of concrete design, internal temperature rise and the temperature stress three aspects carries on the computation analysis, key carries on the detailed elaboration to the raft board mass concrete temperature contraction cleavage resistance checking calculation.Next, according to the raft board mass concrete mixture ratio design, internal temperature rise and the temperature stress computed result, designs the raft board mass concrete construction plan, proposed this project for prevented the mass concrete temperature contraction crack adopts nine technical measures.Third, carries on the raft board great volume concrete actual temperature measurement result same theoretical calculation result the contrast analysis, has drawn this article conclusion, for similar project reference.Finally, this article take a iron game of CRFG office block raft board mass concrete construction as an example, from the proportioning of concrete determination, the temperature stress and the thermal insulation material thickness computation, the concrete construction, the concrete internal actual temperature monitor and the later period maintained and so on the aspects the raft board mass concrete construction plan which elaborated to this article to carry on the concrete implementation. The project practice indicated, in this construction plan adopts prevented the raft board mass concrete temperature crack nine technical measure is effective.