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yuanlidi

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应助: 0 (幼儿园)
金币: 2291.7
散金: 15
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帖子: 400
在线: 133小时
虫号: 982629
注册: 2010-03-26
性别: GG
专业: 高分子合成化学

[交流] 【求助】请大虾帮忙翻译一段关于减水剂流动度测试的英文文献

A kitchen blender (Brown Multiquick 5550 M CA) was used for
mixing..All cement pastes were prepared by weighting 300 g of cement
into the mixing bowl and by adding 105 g of water or wateradmixture
solution (0.05%, 010%, 0.15%, and 0.20% of cement
weight). The mixing procedure was set to 60 s of mixing at stage
6, 30 s scraping the paste off the walls of the bowl by hand and
then again 60 s of mixing at the same stage. A Paar Physica MCR
300 rheometer with concentric cylindrical geometry was used for
these experiments. The rotating bob was serrated with 100 lm
deep vertical lines. The gap between the rotating bob and the cylindrical
beaker was 1.13 mm with a ratio between outer and inner
cylinder of 1.08. The temperature of the cement paste was controlled
by a water bath and kept at 20 C.
After blending, the cement paste was transferred into the measurement
beaker by a spoon. Then, the measuring system with a
rotating bob was lowered to measuring position and the beaker
was covered with a solvent trap to protect the sample from water
evaporation. The measurements were taken 5, 30, and 60 min after
blending performing 1 min pre-shearing at a shear rate of 100 s1
in order to break particle agglomerates. Afterwards, a flow curve
with shear rates between 100 and 0.1 s1 was recorded using a
ramp time of 5 s in the shear rate range of 100–1 s1 and of 10 s
for shear rates below 1 s1. Apparent yield stress and plastic viscosity
were calculated using the Bingham model

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