硫酸溶液中におけるコンクリートの侵食に関する基礎的研究 (IV)

DOI Web Site

書誌事項

タイトル別名
  • Fundamental Studies on the Corrosion of Concrete in Sulfuric Acid Solution (IV)
  • リュウサン ヨウエキチュウ ニ オケル コンクリート ノ シンショク ニ カン
  • Differences among three cements
  • 各種セメント間の相違

この論文をさがす

抄録

For the last six years, experithents on the resistances of normal portland cement and high alumina cement concrete to 5% sulfuric acid solution have been carried out.In this paper, the resistance of portland blast-furnace cement concrete to 5% sulfuric acid solution is compared with the results previously obtained.<BR>Portland blast-furnace cement may be distinguished into A, B, C types with slag content. The long-term strength of this cement concrete is generally greater than that of normal portland cement concrete owing to the latent hydraulic property of the slag. Since portland blast-furnace cement concrete has good workability, a uniform and dense concrete can be made. Thus, portland blast-furnace cement accounts for 4 or 5% of the cement produced in Japan each year and is used for dams and coast structures frequently.<BR>Measurements were made for the following, each week over a 12 week period.<BR>a. Weight and volume<BR>b. Bending and compressive strength<BR>c. Dynamic modulus of elasticity<BR>d. pH value of 5% sulfuric acid solution<BR>e. Roughness on concrete surface<BR>In summary, the results obtained are as follows.<BR>1. Resistance of high alumina cement to sulfuric acid solution was best among the three cements tested.<BR>2. The rate of decrease in weight and volume for high alumina cement was smallest for these three cements.<BR>3. For the same weight of cement per unit volume, the strength of high alumina cement was greatest among these three cements.<BR>4. After five or six weeks, the strength of portland blast-furnace cement concrete was greater than that of normal portland cement concrete.<BR>5. It is assumed that the unit weight of portland blast-furnace cement concrete depends on consistency (slump) rather than the weight of cement per unit volume.

収録刊行物

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ