【摘 要】
：
In the field of concrete admixture, the polycarboxylate superplasticizer (PCE) is usually synthesized at 60-80℃.In this study, a PCE was successfully synthesized at room temperature by a polymerizatio
【机 构】
：
College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, Chin
【出 处】
：
The 14th International Congress on the Chemistry of Cement (
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In the field of concrete admixture, the polycarboxylate superplasticizer (PCE) is usually synthesized at 60-80℃.In this study, a PCE was successfully synthesized at room temperature by a polymerization reaction among acrylic acid (AA), maleic anhydride (MA) and isopentenyl polyethylene glycol (IPEG) to achieve the energy-saving on the basis of excellent application performance.The composition and amounts of initiating system, and the ratio of monomers were determined respectively.The results showed that the oxidation initiator:reduction initiator: IPEG was 0.015: 0.012: 1, and the IPEG: MA: AA: chain transfer agent was 1: 2.5: 1.25: 0.3.Moreover, the effect of polymerization temperature on PCEs fluidity performances was investigated, and the results showed that the cement pastes mixed with PCE synthesized at 10, 20℃, 30℃ respectivelv exhibited better fluidity performances than that mixed with common PCE synthesized at higher temperature.
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