Effect of Magnetic water on Engineering Properties of Cement Mortar with Pozzolanic Materials

• Main Authors: Shu-Wei Liao, 廖書緯
• Other Authors: Nan Su
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/12737467066565223218

碩士 === 國立雲林科技大學 === 營建工程系碩士班 === 95 === This research is after the water through the magnetic field transforms the magnetic water, the magnetic water is mixed with waste catalyst, fly ash and slag to the cement mortar. The objects of this paper are to discussion chemical reaction, fresh mixing strategy, fresh properties, mechanics properties and micro structure. Because the water reconfigures to the regular water molecule after magnetizing, increases electricity attraction between water molecule, and more easily permeate into the cement particle, and make the hydraulic reaction proceeding more adequately. The waste catalyst is little particle, rich porous and pozzolanic reaction activity, and makes promoting the strength of the cement mortar. Because the fly ash has the roller bearing effect and pozzolanic activity, it can raise the cement mortar workability and terminal compressive strength. The slag has the filling effect of fine granulation, so it can improve the cement mortar terminal strength and durability too. The research method mainly uses the general water (0T) and the magnetic water through magnetization (0.2T, 0.4T, 0.6T and 0.8T), the waste catalyst replace cement (0%, 5%, 10% and 15%) , the waste catalyst replace cement (15%) with fly ash and slag, water to binder ratio and age are number of variables, make cement mortar and test analysis, here are the tests：(1)fresh character－flowability and setting tests；(2) mechanics character－the compressive strength for 3 days, 7 days, 28 days, 56 days and 90 days；(3) Micro structure analysis－scanning electron microscopy (SEM) and X-rays diffraction analysis. The result of the research shows that the magnetic water can raise the workability of the cement mortar and accelerate hydraulic reaction and shorten the setting time. The compressive strength raise apparently at 0.4T magnetization and each replacing amount higher than none magnetizing 4% to 16%. The terminal compressive strength because the pozzolanic reaction totally higher than pure cement 6% to 11% when low water to binder ratio 0.5 waste catalyst replacing cement 5% (F5), the F10 strength is better about 4% to 11% raise when water to binder ratio is 0.55. The terminal compressive strength raises 5% to 13% when the waste catalyst replacing cement 5% with slag 10%；We can clearly observe the waste catalyst proceeds to the condition of the pozzolanic reaction in the cement mortar, and the mixing magnetic water can accelerate hydraulic reaction and make hydration products advancement by SEM. And we explain the pozzolanic materials and magnetic water consume the CH and proceed to the condition of the pozzolanic reaction in the cement mortar by the X-rays diffraction analysis experiments.