A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
LOW SHRINKAGE CONCRETE
PROBLEM TO BE SOLVED: To provide a low shrinkage concrete which can obtain sufficient compressive strength and freeze-thaw resistance performance, hardly causes dry shrinkage even when a limestone aggregate and a lime-based expansion material are not used, and can properly suppress occurrence of dry shrinkage cracks.SOLUTION: A low shrinkage concrete contains a steel slag coarse aggregate (A) having a modulus of static elasticity of 72 kN/mmor more, and preferably contains a steel slag coarse aggregate (A) having an actual performance rate of grain diameter decision of 62% or more. By increasing the modulus of static elasticity of the coarse aggregate itself, a physical resistance against the contraction of a concrete is improved. When increasing the actual performance rate of grain diameter decision of the steel slag coarse aggregate having high modulus of static elasticity, the concrete can resist dry shrinkage of a cement paste due to a crosslinking action between the aggregates and can easily obtain an effect of having a high modulus of static elasticity, and accordingly can more effectively suppress the dry shrinkage of the concrete.SELECTED DRAWING: Figure 2
【課題】十分な圧縮強度および凍結融解抵抗性能が得られるとともに、石灰石骨材や石灰系膨張材を使用しなくても乾燥収縮が生じにくく、乾燥収縮ひび割れの発生が適切に抑えられる低収縮コンクリートを提供する。【解決手段】静弾性係数が７２ｋＮ／ｍｍ２以上である鉄鋼スラグ粗骨材（A）、好ましくは、さらに粒形判定実績率が６２％以上である鉄鋼スラグ粗骨材（A）を含む。粗骨材自体の静弾性係数を高くすることで、コンクリートの収縮に対して物理的な抵抗力が向上する。さらに、静弾性係数が高い鉄鋼スラグ粗骨材の粒形判定実績率を高くすると、骨材どうしの架橋作用によりセメントペーストの乾燥収縮に抵抗でき、静弾性係数が高いことによる効果が得られやすくなるため、コンクリートの乾燥収縮をより効果的に抑制することができる。【選択図】図２
LOW SHRINKAGE CONCRETE
PROBLEM TO BE SOLVED: To provide a low shrinkage concrete which can obtain sufficient compressive strength and freeze-thaw resistance performance, hardly causes dry shrinkage even when a limestone aggregate and a lime-based expansion material are not used, and can properly suppress occurrence of dry shrinkage cracks.SOLUTION: A low shrinkage concrete contains a steel slag coarse aggregate (A) having a modulus of static elasticity of 72 kN/mmor more, and preferably contains a steel slag coarse aggregate (A) having an actual performance rate of grain diameter decision of 62% or more. By increasing the modulus of static elasticity of the coarse aggregate itself, a physical resistance against the contraction of a concrete is improved. When increasing the actual performance rate of grain diameter decision of the steel slag coarse aggregate having high modulus of static elasticity, the concrete can resist dry shrinkage of a cement paste due to a crosslinking action between the aggregates and can easily obtain an effect of having a high modulus of static elasticity, and accordingly can more effectively suppress the dry shrinkage of the concrete.SELECTED DRAWING: Figure 2
【課題】十分な圧縮強度および凍結融解抵抗性能が得られるとともに、石灰石骨材や石灰系膨張材を使用しなくても乾燥収縮が生じにくく、乾燥収縮ひび割れの発生が適切に抑えられる低収縮コンクリートを提供する。【解決手段】静弾性係数が７２ｋＮ／ｍｍ２以上である鉄鋼スラグ粗骨材（A）、好ましくは、さらに粒形判定実績率が６２％以上である鉄鋼スラグ粗骨材（A）を含む。粗骨材自体の静弾性係数を高くすることで、コンクリートの収縮に対して物理的な抵抗力が向上する。さらに、静弾性係数が高い鉄鋼スラグ粗骨材の粒形判定実績率を高くすると、骨材どうしの架橋作用によりセメントペーストの乾燥収縮に抵抗でき、静弾性係数が高いことによる効果が得られやすくなるため、コンクリートの乾燥収縮をより効果的に抑制することができる。【選択図】図２
LOW SHRINKAGE CONCRETE
低収縮コンクリート
NAKANISHI KATSUYOSHI (author) / WANG BEI (author) / HAYASHI MASAHIRO (author) / DEN KEITA (author)
2016-02-18
Patent
Electronic Resource
Japanese
IPC:
C04B
Kalk
,
LIME
| British Library Conference Proceedings | 2002