1.

論文

論文
鳥居, 和之 ; 川村, 満紀
出版情報: 材料=Journal of the Society of Materials Science, Japan.  40  pp.1518-1524,  1991-12-15.  日本材料学会
URL: http://hdl.handle.net/2297/12307
概要: 金沢大学理工研究域環境デザイン学系<br />Recently, basic oxygen furnace slag produced by a new steel-making process is supplied as powdere d particles containing a high content of free lime. When this slag is used as a material for the base course of road, its unfavorable self-deterious property may become an important problem. It is considered that the addition of granulated blastfurnace slag, which is a porous and stable material, to the powdered basic oxygen furnace slag can improve both the strength and durability of compacted mixtures. This paper deals with the effective utilization of powdered basic oxygen furnace slag and granulated blastfurnace slag in road construction. The suitability of compacted mixtures of two slags was investigated utilizing such characteristics as resistance to immersion in water, compressive strength and CBR value. Reaction products and microstructural features of the compacted slag mixtures were also elucidated by DSC-TG analysis, X-ray diffraction analysis and SEM observations. From the results, it was made clear that the addition of granulated blastfurnace slag increased the strength and reduced the expansion in immersion in water, and that the compacted slag mixtures fully satisfied the requirements of strength and durability for the base course of road. 続きを見る
2.

論文

論文
川村, 満紀 ; 鳥居, 和之 ; 五十嵐, 心一 ; 藤井, 剛
出版情報: 材料=Journal of the Society of Materials Science, Japan.  38  pp.953-958,  1989-08-15.  日本材料学会
URL: http://hdl.handle.net/2297/12302
概要: 金沢大学理工研究域環境デザイン学系<br />Chloride permeability of concrete is one of the mjor factors that influence the corrosion of stee l reinforcement in concrete. It has been confirmed that the chloride pereability of cement paste and mortar varies widely depending on the water: cement ratio, type of cement, curing condition and so on. However, there are only a few reports concerning the chloride permeability of concrete. This study aims at revealing the effect of curing condition on the chloride permeability of concrete in which Portland cement was replaced in various amounts by flyash and blastfurnace slag. The chloride permeability of concrete was determined by the accelerate chloride permeability test using a diffusion cell similar to that described in Federal Highway Administration report (FHWA/RD-81/119). In order to relate the porosity or pore size distribution of concrete to it chloride permeability, the mercury intrusion porosimetry measurements were alo conducted. The experimental results showed that the chloride permeability of concrete containing flyash and blastfurnace slag was high when the concrete was exposed to a low humidity at the early stage of curing. It was also found that the chloride permeability of concrete increased proportionally with increasing volume of pores larger than 0.1μm in diameter. 続きを見る
3.

論文

論文
鳥居, 和之 ; 川村, 満紀
出版情報: 材料=Journal of the Society of Materials Science, Japan.  37  pp.1254-1259,  1981-11-15.  日本材料学会
URL: http://hdl.handle.net/2297/12303
概要: 金沢大学理工研究域環境デザイン学系<br />Recently, chemical soil stabilization using the deep mixing method has been actively adopted for the improvement of soft ground in the offshore regions. The objective of this study is to reveal the mechanism of strength development in the uncompacted stabilized soils made by the deep mixing method. The mechanical properties such as strength, modulus of deformation and pulse velocity of the soils stabilized by cement or lime-blast furnace slag were comparatively investigated. Furthermore, the reaction process and microstructure in them were elucidated by X-ray diffraction, SEM observation and the measurement of pore size distributions. From these results, the relationship between strength development and change in microstructure in the uncompacted stabilized soils was discussed. 続きを見る