Some Effects of Aging on the Surface Area of Portland Cement Paste
Some Effects of Aging on the Surface Area of Portland Cement Paste
复制标题
老化对硅酸盐水泥浆体表面积的一些影响
DOI：
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发表时间：
1960
期刊：
影响因子：
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通讯作者：
R. Blaine
中科院分区：
文献类型：
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作者：
C. M. Hunt;L. Tomes;R. Blaine
本文研究了用真空干燥法除去部分可蒸发水后的室温硬化水泥浆体。表面积已显示出随时间减少，这取决于糊中剩余的可蒸发水的量。这种变化与水合过程中通常观察到的变化相反，可能代表了一些类似于在其他胶体凝胶中观察到的老化的胶体生长现象。水蒸气和氮气吸附测量已被用来显示在水泥净浆老化的影响。湿膏或干膏显示出比中间可蒸发水含量的膏经历更少的变化，使得如果将储存后的表面积绘制为可蒸发水含量的函数，则获得具有最小值的曲线。随着储存温度的升高，有一些迹象表明，这一最小值可能会向较低的含水量移动。老化是在水泥浆的初始干燥过程中发生的，因此即使水泥浆的初始表面积也取决于水泥浆干燥的方式。
A hardened cement paste cured at room temperature, from which part of the evaporable water has been removed by vacuum drying, has been studied. The surface area has been shown to decrease with time depending upon the amount of evaporable water left in the paste. This change is the opposite of that usually observed during hydration and probably represents some collodial growth phenomena analogous to aging observed in other collodial gels. Both water vapor and nitrogen adsorption measurements have been used to show the effects of aging in cement paste. Wet or dry paste is shown to undergo less change than paste of intermediate evaporable water content, so that if surface area after storage is plotted as a function of evaporable water content, a curve with a minimum is obtained. With increasing storage temperature there is some indication that this minimum might shift towards lower water content. Aging is shown to occur during the initial drying of a cement paste, so that even the initial surface area of a cement paste depends upon the manner in which the paste has been dried.