Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
High-strength corrosion-resistant marine mass concrete and preparation method thereof
The invention discloses high-strength corrosion-resistant marine mass concrete which comprises 0.5-50kg/m < 3 > of temperature shrinkage induced anti-crack fibers and 50-800kg/m < 3 > of pre-wetting internal curing aggregates, wherein the temperature shrinkage induced anti-crack fibers are mixed with the pre-wetting internal curing aggregates; the shrinkage rate of the temperature shrinkage induction type anti-cracking fiber is larger than or equal to 0.5%, the thermal excitation shrinkage temperature is 30-100 DEG C, and the temperature shrinkage induction type anti-cracking fiber comprises a thermal shrinkage composite fiber composed of a thermal shrinkage core material and an outer-layer thermal shrinkage skin material and a water-soluble modified polyvinyl alcohol layer further wrapping the surface of the thermal shrinkage composite fiber. Wherein the water-soluble modified polyvinyl alcohol layer contains polyvinyl alcohol and an expansion component. According to the invention, the temperature shrinkage induced anti-crack fiber with a shrinkage compensation function and the internal curing aggregate with a high-fine communicating pore structure are simultaneously introduced into the high-strength marine mass concrete with the strength of C50 or more, so that the microstructure of the concrete is cooperatively regulated, and the mechanical property, the anti-crack property and the chlorine salt erosion resistance of the concrete are improved; the technical problems of crack control, chlorine salt erosion resistance and the like of the high-strength marine mass concrete are effectively solved.
本发明公开了高强耐蚀海工大体积混凝土，它包括掺量为0.5～50kg/m3的温缩诱导型抗裂纤维和50～800kg/m3的预湿内养护集料；所述温缩诱导型抗裂纤维的收缩率≥0.5％，热激发收缩温度为30～100℃，它包括由热收缩芯材和外层热收缩皮材组成的热收缩复合纤维，以及进一步包覆在其表面的水溶性改性聚乙烯醇层；其中水溶性改性聚乙烯醇层中包含聚乙烯醇和膨胀组分。本发明将具有补偿收缩功能的温缩诱导型抗裂纤维和具有高微细连通孔结构的内养护集料同时引入C50以上高强海工大体积混凝土中，协同调控其微结构并提升其力学性能、抗裂性能和抗氯盐侵蚀性能，有效解决高强海工大体积混凝土控裂和抗氯盐侵蚀等技术难题。
High-strength corrosion-resistant marine mass concrete and preparation method thereof
The invention discloses high-strength corrosion-resistant marine mass concrete which comprises 0.5-50kg/m < 3 > of temperature shrinkage induced anti-crack fibers and 50-800kg/m < 3 > of pre-wetting internal curing aggregates, wherein the temperature shrinkage induced anti-crack fibers are mixed with the pre-wetting internal curing aggregates; the shrinkage rate of the temperature shrinkage induction type anti-cracking fiber is larger than or equal to 0.5%, the thermal excitation shrinkage temperature is 30-100 DEG C, and the temperature shrinkage induction type anti-cracking fiber comprises a thermal shrinkage composite fiber composed of a thermal shrinkage core material and an outer-layer thermal shrinkage skin material and a water-soluble modified polyvinyl alcohol layer further wrapping the surface of the thermal shrinkage composite fiber. Wherein the water-soluble modified polyvinyl alcohol layer contains polyvinyl alcohol and an expansion component. According to the invention, the temperature shrinkage induced anti-crack fiber with a shrinkage compensation function and the internal curing aggregate with a high-fine communicating pore structure are simultaneously introduced into the high-strength marine mass concrete with the strength of C50 or more, so that the microstructure of the concrete is cooperatively regulated, and the mechanical property, the anti-crack property and the chlorine salt erosion resistance of the concrete are improved; the technical problems of crack control, chlorine salt erosion resistance and the like of the high-strength marine mass concrete are effectively solved.
本发明公开了高强耐蚀海工大体积混凝土，它包括掺量为0.5～50kg/m3的温缩诱导型抗裂纤维和50～800kg/m3的预湿内养护集料；所述温缩诱导型抗裂纤维的收缩率≥0.5％，热激发收缩温度为30～100℃，它包括由热收缩芯材和外层热收缩皮材组成的热收缩复合纤维，以及进一步包覆在其表面的水溶性改性聚乙烯醇层；其中水溶性改性聚乙烯醇层中包含聚乙烯醇和膨胀组分。本发明将具有补偿收缩功能的温缩诱导型抗裂纤维和具有高微细连通孔结构的内养护集料同时引入C50以上高强海工大体积混凝土中，协同调控其微结构并提升其力学性能、抗裂性能和抗氯盐侵蚀性能，有效解决高强海工大体积混凝土控裂和抗氯盐侵蚀等技术难题。
High-strength corrosion-resistant marine mass concrete and preparation method thereof
一种高强耐蚀海工大体积混凝土及其制备方法
LI JINHUI (Autor:in) / HE TAO (Autor:in) / FU HAOBING (Autor:in) / DING QINGJUN (Autor:in) / WU JING (Autor:in) / YIN SHI (Autor:in) / XU WEI (Autor:in) / WANG LUOXIN (Autor:in) / WANG HUA (Autor:in) / YU ZI (Autor:in)
19.09.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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