Trial Studies On The Structural Strength Of Pumping Concrete In Tangshan

From the concrete's naissance to now, it has become the most widespread buildingmaterial. Pumping concrete makes the concrete realizes the batch quantity production. Thepumping concrete's strength become to the important index sign of a building quantity.From the earliest also the most frank concrete reference anti-pressing strengthexperimenting to some kinds of newly non-destructive evaluation, the development ofconcrete strength examining can already accurately reflecting the strength of concrete.Also they can supervise and direct the concrete construction.For this reason, pumping concrete normal and winter examination produced bynormal building material of Tangshan have been designed to test the structural strength ofit. The examination results indicate that:Tangshan pumping concrete's strength increasing match the logarithm curve with ageand maturity in normal examination. Its equivalent age is near to the criterion's days. Theconcrete representative value coefficient of same condition specimens is 1.13, which is alittle bigger than the criterion's 1.10.In winter, antifreeze mixed in and adopted heat preservation conserve, the pumpingconcrete's strength increasing also match the logarithm curve. Its equivalent age is beyondthe criterion.In several concrete testing measures, the resilience method and the core-drillingmethod are more exactitude. The by ultrasonic method measuring strength is lower thanthe concrete's strength, and it needs to cooperate with other concrete examine measures.