The Construction Technique Of Mass Concrete Research On SZCEC

Shenzhen Convention & Exhibition Center (SZCEC) is a super-large public building which meets international standard. It covers an area of 220,000 square meters and owns a floor area of 250,000 square meters, with a planned project investment about 2.8 billion yuans. SZCEC will become a landmark in Shenzhen Central District after completed.Based on researches of the mechanism and factors of causing cracks in a mass concrete foundation, its temperature stress is calculated, the method of preventing mass concrete from cracking is analyzed. This found the theoretical basis for the construction of the foundation. Several problems relating to monitoring and construction is discussed. Has designed SZCEC mass concrete foundation construction organization of general interest, and temperature control scheme in advance.Concrete cement is hardened in 3-5 initial days ( say definitely in the day of 3th) will reach highest temperature in, concrete body, begin soon afterwards cool down , calculate forecast value and actual condition accord with this rule. Calculate forecast value and actual condition coincide better, have explained the mass concrete crack control of general interest feasibility. A mass concrete foundation or structure for general interest, pass make every construction preparation scientifically, organize construction meticulously, strict control construction program, can decrease completely even avoid structural appearance crack.This article introduces in detail the construction technology of mass concrete about basement slab, and emphasizes the description of the choosing of raw materials, the optimization of the design of the mixture ratio, the computation of thermal stresses (before and after concrete casting), and the organization, supervision, surveying and monitoring of the works.The basement slab construction process utilized the above technologies with great success in solving the common construction problem of the cracking of mass concrete. As a result great economic and social benefits were reaped.