Physical and chemical studies on cement containing sugarcane molasses
Physical and chemical studies on cement containing sugarcane molasses
复制标题
甘蔗糖蜜水泥的理化研究
DOI：
10.1007/s10973-014-3947-4
复制
发表时间：
2014-07
影响因子：
4.4
通讯作者：
Xiaodong Shen
中科院分区：
文献类型：
--
作者：
Weifeng;Suhua Ma;Shengbiao Zhang;Xiaodong Shen
糖蜜通常用作水泥中的助磨剂和混凝土中的减水剂和缓凝剂。在中国，产量主要包括甘蔗糖蜜。本文研究了甘蔗糖蜜对常规波特兰水泥物理性能和水化化学的影响。分别按GB/T 1346、GB/T 17671和GB/T 2419标准测定了水泥净浆的凝结时间、标准稠度、抗压强度和流动度。利用量热仪研究了糖蜜对水泥水化动力学的影响。采用X射线粉末衍射仪、差示扫描量热仪和压汞仪对水泥浆体的水化产物和孔径分布进行了分析。结果表明，少量甘蔗糖蜜能延缓水泥净浆的凝结硬化，增加水泥砂浆的流动性，过量甘蔗糖蜜则能加速水泥的凝结硬化。糖蜜的加入降低了试样的孔隙率，显著提高了试样的3d抗压强度。1.0%糖蜜的加入促进了钙矾石的形成，阻止了铝酸盐相的二次水化，延缓了C3 S的水化。
Molasses is generally used as a grinding aid in cement and as a water reducer and retarder in concrete. In China, the output primarily consists of sugarcane molasses. In this paper, the effects of sugarcane molasses on the physical performance and hydration chemistry of conventional Portland cement were investigated. The setting times, the normal consistency of cement pastes, the compressive strengths and fluidities of the mortars were respectively determined according to Chinese Standard GB/T 1346, GB/T17671 and GB/T 2419. The effect of molasses on the hydration kinetics of cement was investigated using a calorimeter. The hydration products and pore size distribution of the cement pastes were analysed by X-ray powder diffraction, differential scanning calorimetry and a mercury injection apparatus. The results show that a small amount of sugarcane molasses retards the setting and hardening of cement paste and increases the fluidity of cement mortar, while excess molasses accelerates the setting and hardening. Molasses improves significantly the compressive strength at 3d due to the decrease of porosity. The addition of 1.0 % molasses accelerates the formation of ettringite, prevents the second hydration of aluminate phase and delays the hydration of C3S.
登录
查看更多内容
DOI：
10.1016/s1065-7355(98)00005-4
发表时间：
1998-07
期刊：
Advanced Cement Based Materials
影响因子：
--
作者：
C. Neubauer;Ming Yang;Hamlin M. Jennings
通讯作者：
C. Neubauer;Ming Yang;Hamlin M. Jennings
影响因子：
11.4
作者：
M. Juenger;H. Jennings
通讯作者：
M. Juenger;H. Jennings
DOI：
--
发表时间：
1979
期刊：
Concrete international
影响因子：
--
作者：
L. Meyer;W. Perenchio
通讯作者：
L. Meyer;W. Perenchio
DOI：
10.1680/iicep.1965.9477
发表时间：
1965-06
期刊：
--
影响因子：
--
作者：
R. Ashworth
通讯作者：
R. Ashworth
影响因子：
11.4
作者：
Bullard, Jeffrey W.;Jennings, Hamlin M.;Thomas, Jeffrey J.
通讯作者：
Thomas, Jeffrey J.