Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Internal curing concrete and preparation method thereof
The invention discloses internal curing concrete which is prepared from the following components in parts by weight: 290 to 360 parts of cement, 3 to 22 parts of bentonite, 20 to 40 parts of lime, 40 to 60 parts of fly ash, 600 to 800 parts of fine aggregate, 800 to 1000 parts of coarse aggregate, 0.2 to 0.6 part of multiwalled carbon nanotube, 8 to 14 parts of surfactant and 100 to 166 parts of water, the bentonite is prepared from the following components in percentage by mass: 63.12 percent of SiO, 21.45 percent of P2O5, 13.85 percent of Al2O3, 4.26 percent of Fe2O3 and 4.00 percent of SO3; the purity of the multi-walled carbon nanotube is greater than 95%, the outer diameter of the multi-walled carbon nanotube is 10-20 nm, the inner diameter of the multi-walled carbon nanotube is 5-10 nm, the length of the multi-walled carbon nanotube is 10-20 microns, and the specific surface area of the multi-walled carbon nanotube is greater than 220 m < 2 >/g. Bentonite is used as an internal curing material, water molecules can be released in the initial hydration stage of concrete, the self-drying property of the concrete is relieved, the bentonite releases water in the later stage, continuous hydration of unhydrated cement particles in a cement matrix is promoted, secondary hydration of a cementing material is promoted, pores of the matrix are refined, and the drying shrinkage rate is reduced.
本发明公开了一种内养护混凝土，包括按以下重量份数配比的组分：水泥290‑360份、膨润土3‑22份、石灰20‑40份、粉煤灰40‑60份、细骨料600‑800份、粗骨料800‑1000份、多壁碳纳米管0.2‑0.6份、表面活性剂8‑14份和水100‑166份；所述膨润土包括按以下质量百分数配比的组分：63.12％SiO、21.45％P2O5、13.85％Al2O3、4.26％Fe2O3和4.00％SO3；所述多壁碳纳米管的纯度大于95％，多壁碳纳米管的外径10‑20nm，多壁碳纳米管的内径5‑10nm，多壁碳纳米管的长度10‑20微米，多壁碳纳米管的比表面积＞220m2/g。本发明通过将膨润土作为内养护材料，在混凝土水化初期，水分子会被释放，减轻混凝土的自干性，后期膨润土通过释放水促进了水泥基体中未水化水泥颗粒继续水化以及促进胶凝材料的二次水化，细化了基体的孔隙，降低了干燥收缩率。
Internal curing concrete and preparation method thereof
The invention discloses internal curing concrete which is prepared from the following components in parts by weight: 290 to 360 parts of cement, 3 to 22 parts of bentonite, 20 to 40 parts of lime, 40 to 60 parts of fly ash, 600 to 800 parts of fine aggregate, 800 to 1000 parts of coarse aggregate, 0.2 to 0.6 part of multiwalled carbon nanotube, 8 to 14 parts of surfactant and 100 to 166 parts of water, the bentonite is prepared from the following components in percentage by mass: 63.12 percent of SiO, 21.45 percent of P2O5, 13.85 percent of Al2O3, 4.26 percent of Fe2O3 and 4.00 percent of SO3; the purity of the multi-walled carbon nanotube is greater than 95%, the outer diameter of the multi-walled carbon nanotube is 10-20 nm, the inner diameter of the multi-walled carbon nanotube is 5-10 nm, the length of the multi-walled carbon nanotube is 10-20 microns, and the specific surface area of the multi-walled carbon nanotube is greater than 220 m < 2 >/g. Bentonite is used as an internal curing material, water molecules can be released in the initial hydration stage of concrete, the self-drying property of the concrete is relieved, the bentonite releases water in the later stage, continuous hydration of unhydrated cement particles in a cement matrix is promoted, secondary hydration of a cementing material is promoted, pores of the matrix are refined, and the drying shrinkage rate is reduced.
本发明公开了一种内养护混凝土，包括按以下重量份数配比的组分：水泥290‑360份、膨润土3‑22份、石灰20‑40份、粉煤灰40‑60份、细骨料600‑800份、粗骨料800‑1000份、多壁碳纳米管0.2‑0.6份、表面活性剂8‑14份和水100‑166份；所述膨润土包括按以下质量百分数配比的组分：63.12％SiO、21.45％P2O5、13.85％Al2O3、4.26％Fe2O3和4.00％SO3；所述多壁碳纳米管的纯度大于95％，多壁碳纳米管的外径10‑20nm，多壁碳纳米管的内径5‑10nm，多壁碳纳米管的长度10‑20微米，多壁碳纳米管的比表面积＞220m2/g。本发明通过将膨润土作为内养护材料，在混凝土水化初期，水分子会被释放，减轻混凝土的自干性，后期膨润土通过释放水促进了水泥基体中未水化水泥颗粒继续水化以及促进胶凝材料的二次水化，细化了基体的孔隙，降低了干燥收缩率。
Internal curing concrete and preparation method thereof
一种内养护混凝土及其制备方法
QU WEI (Autor:in) / ZHANG YUQIAN (Autor:in) / WANG LI (Autor:in) / ZHU KUN (Autor:in) / ZHU MINTAO (Autor:in) / BIAN CHENGHUI (Autor:in) / GU WEIHONG (Autor:in)
10.09.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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