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泡沫轻质土流变参数研究

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配制不同密度等级泡沫轻质土,采用布氏粘度计法测试净浆及泡沫轻质土流变参数,研究泡沫对浆体流变行为影响规律.结果表明:泡沫轻质土流变行为同样符合宾汉姆流体特征.泡沫的引入主要影响浆体在低速剪切阶段表观粘度.随着泡沫掺量的增加,浆体的屈服应力明显增大,而塑性粘度先明显减小而后趋势放缓.其中塑性粘度与泡沫轻质土流动度关联性较大,可用于新拌泡沫轻质土工作性评估.
Rheological Parameters of Foamed Lightweight Soil
The rheological parameters of foamed lightweight soil with different density grades were measured by Brinell viscometer,and the effect of foamed lightweight soil on rheological behavior was studied.The results show that the rheological behavior of foamed lightweight soil is also consistent with Bingham fluid characteristics.The introduc-tion of foam mainly affects the apparent viscosity of slurry at low shear speed.With the increase of foam content,the yield stress of slurry increases obviously,while the plastic viscosity decreases at first and then slows down.The plastic viscosity is closely related to the fluidity of the foamed lightweight soil,which can be used to evaluate the workability of the newly mixed foamed lightweight soil.

foamed lightweight soilworkabilityplastic viscosityyield stress

王少华、潘良胜、朱启洋、刘林林、朱富万、张千一

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江苏现代路桥有限责任公司,南京 210018

泡沫轻质土 工作性 塑性粘度 屈服应力

2024

建材世界
武汉理工大学

建材世界

影响因子:0.869
ISSN:1674-6066
年,卷(期):2024.45(5)