[1]徐安花,关博文,马 慧,等.氯氧镁水泥流变特性研究[J].长安大学学报(自然科学版),2017,37(03):47-52.
 XU An-hua,GUAN Bo-wen,MA Hui,et al.Research on rheological properties of magnesium oxychloride cement[J].Journal of Chang’an University (Natural Science Edition),2017,37(03):47-52.
点击复制

氯氧镁水泥流变特性研究()
分享到:

长安大学学报(自然科学版)[ISSN:1006-6977/CN:61-1281/TN]

卷:
第37卷
期数:
2017年03期
页码:
47-52
栏目:
道路工程
出版日期:
2017-05-31

文章信息/Info

Title:
Research on rheological properties of magnesium oxychloride cement
作者:
徐安花关博文马 慧夏 雨吴佳育陈华鑫
1. 长安大学 材料科学与工程学院,陕西 西安 710061; 2. 青海省交通科学研究院,青海 西宁 810001
Author(s):
XU An-hua GUAN Bo-wen MA Hui XIA Yu WU Jia-yu CHEN Hua-xin
1. School of Materials Science and Engineering, Chang’an University, Xi’an 710061, Shaanxi, China; 2. Qinghai Transportation Research Institute, Xining 810001, Qinghai, China
关键词:
道路工程氯氧镁水泥流变学剪切应力塑性黏度Power-law模型
Keywords:
road engineering magnesium oxychloride cement rheology shear stress plastic viscosity Power-law model
分类号:
U414.18; TQ172; TB321
文献标志码:
A
摘要:
 针对氯氧镁水泥早强快硬特性导致其制备的混凝土存在长距离运输时不易搅拌、难泵送等施工受限问题。通过旋转黏度试验测定了氯氧镁水泥浆体在不同剪切速率下的剪切应力及塑性黏度值,采用幂律(Power-law)流体模型拟合氯氧镁水泥流变曲线,并通过该模型分析氯氧镁水泥材料组成设计参数MgOMgCl2H2O的物质的量比对氯氧镁水泥浆体的剪切应力、塑性黏度及流变特性的影响。研究结果表明:Power-law模型适用于氯氧镁水泥浆体流变曲线拟合,其拟合判定系数均大于0.9,拟合度高,并且可以对稠度系数、流变指数等流变参数进行较好的描述;氯氧镁水泥浆体的剪切应力随剪切速率的增大而增大,而塑性黏度随剪切速率的增大先迅速降低后趋于平稳;剪切速率相同时,氯氧镁水泥浆体的剪切应力随MgOMgCl2物质的量比增大而增大,随H2OMgCl2物质的量比增大而减小;随着水泥水化的进行,浆体剪切应力和塑性黏度均增大,当MgOMgCl2H2O的物质的量比为7115时浆体最稳定。
Abstract:
 The early hard and fast characteristics of magnesium oxychloride cement lead to the construction problems of the concrete with long-distance transportation, is difficult to stir and difficult to pump and so on, which limits the popularization and application of magnesium oxychloride cement material. The shear stress and plastic viscosity of magnesium oxychloride cement paste at different shear rates were measured by the rotational viscosity test. The Power-law model was used to fit the rheological curves of magnesium oxychloride cement, and the influence of the design parameters on the rheological properties of magnesium oxychloride cement were analyzed by the model. The results show that the Power-law model can be used to fit the rheological curves of magnesium cement slurry, and the rheological parameters such as consistency coefficient and rheological index can be described. The shear stress of magnesium oxychloride cement paste increases with the increase of shear rate. The plastic viscosity decreases rapidly and then tends to be stable. When the shear rate is the same, the shear stress increases with the increase of the amount-of-substance ratio of MgO to MgCl2, and decreases with the increase of the amount-of-substance ratio of H2O and MgCl2. With the hydration of cement, the shear stress and plastic viscosity increase. When the amount-of-substance ratio of MgO, MgCl2 and H2O is 7115, the paste is the most stable.

相似文献/References:

[1]武建民,祝伟,马士让,等.应用加权密切值法评价基质沥青抗老化性能[J].长安大学学报(自然科学版),2012,32(01):0.
[2]张宜洛,袁中山.SMA混合料结构参数的影响因素[J].长安大学学报(自然科学版),2012,32(01):0.
[3]陈璟,袁万杰,郝培文,等.微观指标对沥青热稳定性能的影响[J].长安大学学报(自然科学版),2012,32(01):0.
[4]周兴业,刘小滔,王旭东,等.基于轴载谱的沥青路面累计当量轴次换算[J].长安大学学报(自然科学版),2012,32(01):0.
[5]李祖仲,王伯禹,陈拴发,等.轴载对复合式路面应力吸收层荷载应力的影响[J].长安大学学报(自然科学版),2012,32(01):0.
[6]关博文,刘开平,陈拴发,等.水镁石纤维路面混凝土路用性能[J].长安大学学报(自然科学版),2012,32(01):0.
[7]翁效林,王玮,张留俊,等.拓宽路基荷载下管桩复合地基沉降变形模式[J].长安大学学报(自然科学版),2012,32(01):0.
[8]穆柯,王选仓,柳志军,等.基于非饱和渗流原理的路基含水率预估[J].长安大学学报(自然科学版),2012,32(01):0.
[9]李振霞,陈渊召.不同类型半刚性基层材料性能的试验与分析[J].长安大学学报(自然科学版),2012,32(01):0.
[10]马 骉,马 晋,周宇鹏.沥青混合料降温收缩断裂特性[J].长安大学学报(自然科学版),2012,32(03):1.
 MA Biao,MA Jin,ZHOU Yu-peng.Cooling shrinkage fracture characteristic of asphalt mixture[J].Journal of Chang’an University (Natural Science Edition),2012,32(03):1.
[11]冯 超,关博文,张 奔,等.外加剂对氯氧镁水泥水化过程影响[J].长安大学学报(自然科学版),2019,39(05):1.
 FENG Chao,GUAN Bo wen,ZHANG Ben,et al.Influence of admixtures on hydration process of magnesium oxychloride cement[J].Journal of Chang’an University (Natural Science Edition),2019,39(03):1.

更新日期/Last Update: 2017-06-06