Conclusions
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1.
Pumping of cement grouts through pipes of different diameters showed a ubiquitous decrease of pressure Losses along the length (and accordingly a considerable improvement of pumpability) for dispersed grouts compared with undispersed.
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2.
The main rheological parameters of ordinary and dispersed cement grouts were established as a result of the bench investigations. After dispersing grouts (up to three passes through the disperser) the indices of the dynamic shear stress and non-Newtonian viscosity of these grouts decrease.
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3.
It is completely permissible to use the SPV-5 instrument under field (construction) conditions for prompt comparative measurements of the relative viscosity of ordinary and dispersed cement grouts.
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4.
Dispersion of grouts with up to three passes through the disperser does not affect the strength indices of the hardened cement.
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5.
The data of the present bench tests confirmed the recommendations published earlier by Gidrospetsproekt concerning the use of dispersed cement grouts with a degree of dispersion of two-three passes through the disperser.
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Literature cited
V. A. Ashikhmen and V. I. Dolotkazin, “Tests of a hydrodynamic cement grout disperser,” Informénergo, Ser. SGÉS, Moscow, No. 6 (1981).
E. S. Argal, V. A. Ashikhmen, and E. S. Baranos, Sealing Concrete Dams by Grouting Joints [in Russian], Informénergo, Moscow (1970).
V. P. Detkov, Cementing Directional Walls [in Russian], Nedra, Moscow (1978).
Additional information
Translated from Gidrotekhnicheskoe Stroitel'stvo, No. 10, pp. 34–38, October, 1986.
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Ashikhmen, V.A., Pronina, L.É. Rheological properties of dispersed cement grouts. Hydrotechnical Construction 20, 598–603 (1986). https://doi.org/10.1007/BF01427249
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DOI: https://doi.org/10.1007/BF01427249