A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
METHOD FOR PRODUCING CEMENT HARDENED BODY
PROBLEM TO BE SOLVED: To provide a method for producing a cement hardened body, in which the cement hardened body is obtained by using a cement composition having 0.2 or smaller (water)/(a binding material) ratio and is capable of exhibiting high strength without generating a local strength variation due to deterioration of flow properties of the cement composition.SOLUTION: The method for producing the cement hardened body comprises: a step of mixing the cement composition, which contains cement, aggregate, silica fume and water and has 10-35 mass% of a ratio of the silica fume to the total binding material and 0.2 or smaller (water)/(the binding material) ratio, throwing an obtained mixture in a molding flask and hardening the thrown mixture to form a cement compact; a first aging step of steam-aging the obtained cement compact within a temperature range of 70-100°C for 2-72 hours; and a second aging step of heating the cement compact, which is aged at the first aging step, under a pressurized condition, the pressure of which exceeds normal pressure and is equal to or lower than 22 MPa, and within another temperature range of 100-400°C.SELECTED DRAWING: None
【課題】水／結合材比が０．２以下であるセメント組成物を用いた、セメント組成物の流動性の低下に起因する局所的な強度のばらつきを生じることなく、高い強度を発現しうるセメント硬化体の製造方法を提供する。【解決手段】セメントと、骨材と、シリカフュームと、水とを含み、シリカフュームの全結合材に対する含有量が１０質量％〜３５質量％であり、水／結合材比が０．２以下であるセメント組成物を混合して型枠に投入し、硬化させてセメント成形体を形成する工程と、得られたセメント成形体を、７０℃〜１００℃の温度範囲で２時間〜７２時間蒸気養生する第１の養生工程と、第１の養生工程を経た後のセメント成形体を、常圧を超え２２ＭＰａ以下の加圧条件下で、１００℃〜４００℃の温度範囲で２時間〜７２時間加熱する第２の養生工程と、をこの順に有するセメント硬化体の製造方法。【選択図】なし
METHOD FOR PRODUCING CEMENT HARDENED BODY
PROBLEM TO BE SOLVED: To provide a method for producing a cement hardened body, in which the cement hardened body is obtained by using a cement composition having 0.2 or smaller (water)/(a binding material) ratio and is capable of exhibiting high strength without generating a local strength variation due to deterioration of flow properties of the cement composition.SOLUTION: The method for producing the cement hardened body comprises: a step of mixing the cement composition, which contains cement, aggregate, silica fume and water and has 10-35 mass% of a ratio of the silica fume to the total binding material and 0.2 or smaller (water)/(the binding material) ratio, throwing an obtained mixture in a molding flask and hardening the thrown mixture to form a cement compact; a first aging step of steam-aging the obtained cement compact within a temperature range of 70-100°C for 2-72 hours; and a second aging step of heating the cement compact, which is aged at the first aging step, under a pressurized condition, the pressure of which exceeds normal pressure and is equal to or lower than 22 MPa, and within another temperature range of 100-400°C.SELECTED DRAWING: None
【課題】水／結合材比が０．２以下であるセメント組成物を用いた、セメント組成物の流動性の低下に起因する局所的な強度のばらつきを生じることなく、高い強度を発現しうるセメント硬化体の製造方法を提供する。【解決手段】セメントと、骨材と、シリカフュームと、水とを含み、シリカフュームの全結合材に対する含有量が１０質量％〜３５質量％であり、水／結合材比が０．２以下であるセメント組成物を混合して型枠に投入し、硬化させてセメント成形体を形成する工程と、得られたセメント成形体を、７０℃〜１００℃の温度範囲で２時間〜７２時間蒸気養生する第１の養生工程と、第１の養生工程を経た後のセメント成形体を、常圧を超え２２ＭＰａ以下の加圧条件下で、１００℃〜４００℃の温度範囲で２時間〜７２時間加熱する第２の養生工程と、をこの順に有するセメント硬化体の製造方法。【選択図】なし
METHOD FOR PRODUCING CEMENT HARDENED BODY
セメント硬化体の製造方法
KOJIMA MASAO (author) / MITSUI TATEO (author) / UGOSHI MOTOKI (author) / TSUJI DAIJIRO (author) / TAKAGI SHUNSUKE (author) / MATSUSHITA TETSURO (author) / HONMA DAISUKE (author)
2016-10-13
Patent
Electronic Resource
Japanese
| European Patent Office | 2024
CEMENT COMPOSITION, AND METHOD FOR PRODUCING CEMENT-HARDENED BODY
| European Patent Office | 2021