【摘 要】
：
Polycarboxylate ether/ester (PCE) superplasticizer has gotten wide spread application in ready mixed concrete so far.But the use of PCE in pre-stressed high
【机 构】
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College of Materials Sci.&Eng., Beijing University of Technology, Beijing 100124
【出 处】
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The 14th International Congress on the Chemistry of Cement (
论文部分内容阅读
Polycarboxylate ether/ester (PCE) superplasticizer has gotten wide spread application in ready mixed concrete so far.But the use of PCE in pre-stressed high strength concrete tubular pile (PHSCTP) has not substantially started yet for its particular fabrication process.In this paper the factors influencing the centrifugal water separation property of concrete were tested and discussed, according to the requirements of tubular pile manufacture process.The dewatering property of cement pastes with different structural PCEs and poly naphthalene sulfonate (PNS) condensate was investigated.The effect of molecular structure of PCE on the hydration process was monitored and analyzed.The demoulding strength of concrete with PCE and PNS superplasticizers at 1 day after steam curing was compared.The results showed that the demoulding strength of concrete for C80 PHSCTP could reach as high as 75MPa ~ 80MPa in the case of using PCE, and the autoclave curing process could be saved with the help of strong dispersing ability and high early strength property of PCE.PCE has a good application prospect in the field of PHSCTP for its high water reducing effect, low shrinkage and minor detrimental substance content.
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