|
ИСТИНА |
Войти в систему Регистрация |
ИСТИНА ЦЭМИ РАН |
||
Investigation of the Penetrability of CEM II/B-M Based Microfine Cement Grouts in Composite Sands with Different Gradationстатья
- Автор: Christodoulou Dimitrios*
- Журнал: Research & Development in Material science
- Том: 16
- Номер: 4
- Год издания: 2022
- Первая страница: 1859
- Последняя страница: 1862
- Аннотация: Grouting is a common technical method with many applications, e.g. it is used for soil stabilization and strengthening, for reduction for water ingress to underground facilities or of the water loss through a dam foundation, etc. Grouts comprise several constituents, which are combined in many ways depending on the in-situ conditions and the outcome desired. The use of very fine cement grouts for injections into fine-to-medium sands has been proposed to circumvent problems associated with the permanence and toxicity of chemical grouts and the inability of ordinary cement grouts to permeate soil formations finer than coarse sand. A laboratory investigation was conducted in order to evaluate the penetrability of cement suspensions. Two gradations from CEM II/B-M (according to EN 197-1) type of cement were used having nominal maximum grain sizes of 100μm and 10μm. Suspension properties with water-tocement (W/C) ratio of 2:1 by weight, were determined in terms of apparent viscosity. The experimental results reported in the present paper suggest some trend in the effect of gradation on grout penetrability, however, rather the regulatory factor is the increase in the percentage of fine components in the final composition of the mixture
- Добавил в систему: Nguyen Thi Yen Hoa