Studying Properties of Concrete Used in Making Cast-In-Place Piles
The present work deals with the studying of the concrete properties used in making boring piles subjected in the process of shaping and the following use to the effect of the aggressive water-and-salt ground environment. The study considers a complex modification of the concreting process in making boring piles in water-saturated grounds. The first stage is the activation of the binder by the modifier polymethylpenten by means of mixing at high shear stresses in jet units. The second stage is the introduction in the concrete mixture of plasticized suspension polyvinylchloride with particle size less than 150...200 mkm. The third stage is the treatment of the bore-hole surface with the product of processing the wastes of coke-and-chemical production. The additive to the concrete mixture including a soapstock of vegetable oils -2,0...8,0 ％, triethanolamine - 0,1...0,3 ％, super-plasticizer - 4,0...8,0 ％ and water, is characterized by that it additionally contains a hardening accelerator, i.e. polymethylpenten -0,1...0,3 ％ and a plasticizer, i.e. the product of processing coke-and-chemical production - 4,0...12,0 ％. The concrete modifier type was selected depending on micro- and macropores sizes formed in the process of forming the concrete structure in hardening. The calculated data showed that when introducing 3...5 mass particles of polymethylpenten there are achieved the optimal strength properties of the cement stone.
Abdrakhmanova K.A Zhakulin A.S Seidmarova T.Zh.
Karaganda State Technical University, Karaganda, Kazakhstan The L.N.Gumilyov Eurasian National University, Astana, Kazakhstan
国际会议
哈尔滨
英文
294-297
2009-07-22（万方平台首次上网日期，不代表论文的发表时间）