FINELY DISPERSED COMPOSITE BINDER FOR REINFORCING SOILS BY INJECTION METHOD
| Autor: | Kharchenko Igor Yakovlevich, Grishin Andrey Nikolaevich, Panchenko Igor Yakovlevich, Bazhenov Marat Il’darovich |
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| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Physics micro-cement finely dispersed binder Analytical chemistry lcsh:HD9715-9717.5 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences composite binder carbide sludge active mineral admixture injection lcsh:Construction industry 0103 physical sciences suspension lime lcsh:Architecture 0210 nano-technology lcsh:NA1-9428 |
| Zdroj: | Vestnik MGSU, Iss 11, Pp 1289-1298 (2017) |
| ISSN: | 2304-6600 1997-0935 |
| Popis: | Subject: we consider the problem of supplying the construction industry, in particular underground construction, with mineral binder for diluted aqueous suspensions that meet the requirements for reinforcement of low-strength sand and clastic soils by injections into the reinforced soil mass. Research objectives: substantiating possibility of using amorphous biosilica in combination with carbide sludge, whose particles size does not exceed 10 mm on average, as a binder for aqueous suspensions being injected. Materials and methods: as raw materials we used: common construction hydrated lime from “Stroimaterialy” JSC, Belgorod, hydrated lime in the form of carbide sludge from the dumps of Protvino plant (carbide sludge, hereafter), active mineral admixture biosilica from the group of companies “DIAMIX” and a plasticizer Sika viscocrete 5 new. Test methods are in accordance with applicable standards. To obtain samples of impregnated soils, a specially developed technique was used in the form of a unidirectional model. Results: properties of the composite binder prepared with different compositions are presented. The optimal component ratios are determined. The following properties of aqueous suspensions are studied: conditional viscosity, sedimentation and penetrating ability. Conditional viscosity is no more than 40 sec on average. Sedimentation does not exceed 1.2 %. Soil-concrete obtained by injection of a dilute aqueous suspension based on this composite binder has a compressive strength in the range from 4.44 to 12.5 MPa. Conclusions: utilization of finely dispersed composite mineral binder, which is based on interaction of amorphous silica with calcium hydroxide, as a binder for high penetration aqueous suspensions has been substantiated. This binder is not inferior to foreign analogues in terms of its strength and technological parameters and can be used for reinforcement of loose and low-strength soils. In case of using carbide sludge, the ecological and environment protection problems are being solved since it is a waste product in production of acetylene. |
| Databáze: | OpenAIRE |
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