Shandong University

Qingdao University of Technology

China University of Petroleum

Chengdu Omax Petroleum Technology Co., Ltd

Wei Zhou

Jinsheng Sun

Junwei Liu

Chengwen Wang

Ruihe Wang

Jianqiang Chen

Yucheng Xue

Xiaoyu Bai

Enbo Fan

Yutian Wang

Xun Wang

Zhen Xu

Taiyan Liu

Beibei Ji

Qiuhong Cao

Changqiang Tang

Binbin Song

Yong Li

Dehua Li

Zhaoxin Li

Lingbo Meng

A fiber pre-dispersing device for fiber reinforced concrete, comprising: a dispersing chamber, a feed inlet is installed on the upper side of a dispersing chamber, a hopper is installed in the feed inlet, a first dispersing device is installed in the dispersing chamber, a discharge outlet is installed at the bottom of the dispersing chamber, and connected with a second dispersing device, grooves are arranged at both sides of dispersing chamber, supporting legs are installed in the grooves. According to the invention, the device has a first dispersing device and a second dispersing device, and the dispersing blocks in the first dispersing device cooperates with the dispersing gears of the roller to preliminarily disperse and stir the fiber raw materials, a second dispersing device; dispersing the preliminary dispersed fiber raw materials, in order to control the fineness of pre-dispersed fiber raw materials, oil cylinders arranged on both sides can push their respective grinding cylinders to adjust the dispersion, thus improving both fiber dispersion effect and using the effect in concrete works.

Fiber pre-dispersing device for fiber reinforced concrete

Terahertz spectrum measurement method and system based on an unequal optical path method is provided. By using a Femtosecond laser and a Terahertz time-domain spectroscopy system, samples to be measured and having different thicknesses are subjected to scanning by time-domain Terahertz signals to obtain transmission signals of the samples with two different thicknesses. The signal after passing through a sample with the thickness of dis a reference signal, and the signal after passing through a sample with the thickness of dis a sample signal. When Terahertz waves are normally incident to the samples and having different thicknesses, the signals emitted from the samples have an optical path difference therebetween. Phase-containing frequency spectra are obtained after time-domain signals are subjected to Fourier transform. The parameters, such as a refractive index, an extinction coefficient, and an absorption coefficient, can be calculated through the extracted phase-containing frequency spectrums.

Terahertz spectrum measurement method and system based on unequal optical path method

The present disclosure relates to a high-temperature retarder suitable for oil and gas well cementation, a preparation method thereof and a cementing slurry.

High-temperature retarder suitable for oil and gas well cementation, preparation method thereof and cementing slurry

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Qingdao, China

Wei Zhou