Improvement Mechanisms on Fluidity and Strength Development of Mortal by Addition of Polymer
By Zhixiang Lin
Concrete Research and Technology
Vol.17, No.1, Jan 2006 (Issue 40)
- Synopsis:
- In this study, the improvement mechanisms of fluidity and strength development of the steam cured polymer-modified mortal (PMM) with low water cement ratio were investigate. The fluidity was estimated from the rheological property, the flocclation formation structure of the flresh PMM and the rate of hydration reaction. The strength development was estimated from the hydration reaction of cement, the hydration products, and the composition and structure of hardened PMM. The results obtained are as follows: The rheological property of PMM for high self-compactablility was optimized by adjusting of polymer and superplaticizer contents. The transition zone was not observed and the uniformly dense hydration structure was formed in PMM because of its low water to cement ratio. The polymer in PMM filled pore space by mesh structre. PMM with high early stregth Portland cement accelerates the hydration reaction and forms more dense structure compare to that with ordinary Portlamd cement.
- Keywords:
- Polymer-modified mortal, Fluidity, Strength development, Mechanism, Steam curing
