Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Ultrahigh-strength concrete and preparation method thereof
The invention discloses ultrahigh-strength concrete and a preparation method thereof. The ultrahigh-strength concrete is prepared from the following components in percentage by mass: 30 to 45 percent of cement, 15 to 25 percent of composite admixture, 27 to 35 percent of fine aggregate, 3 to 9 percent of fine steel fiber, 2 to 5 percent of polycarboxylic acid water reducing agent, 5 to 8 percent of water and 0.01 percent of active connecting agent, the cement is 42.5 # ordinary Portland cement; the compound admixture mainly comprises active SiO2 and trace elements in a component ratio of 3: 7; the fine aggregate is fine quartz sand with the particle size range of 0-1.25 mm, and the content of coarse sand is 690-810 kg/m < 3 >, the content of medium sand is 300-370 kg/m < 3 >, and the content of fine sand is 105-210 kg/m < 3 > according to the thickness degree; the fine steel fibers are fine round steel fibers with copper-plated surfaces, the diameter of each fine steel fiber is 0.18-0.22 mm, and the length of each fine steel fiber is 12-14 mm. The compressive strength of the ultrahigh-strength concrete is 2-4 times that of high-strength concrete, and meanwhile, the ultrahigh-strength concrete has very high deformability; the breaking strength is 4-6 times that of high-strength concrete, and the tension-compression ratio can reach about 1/6 after fibers are doped; the internal structure of the material is compact, defects are few, the anti-permeability grade of the material is larger than P50, the anti-freezing grade of the material is larger than F600, the electric flux is smaller than 50 coulomb, and the material has extremely high durability.
本发明所公开的超高强混凝土及其制备方法，按各组分的质量百分比计：水泥30％～45％、复合掺和料15％～25％、细骨料27％～35％、细钢纤维3％～9％、聚羧酸系减水剂2％～5％、水5％～8％与活性连接剂0.01％；水泥采用42.5#普通硅酸盐水泥；复合掺和料主要为活性SiO2与微量元素，组分配比为3:7；细骨料为粒径范围为0～1.25mm的细石英砂，按粗细程度计算含量粗砂690～810kg/m3、中砂300～370kg/m3、与细砂105～210kg/m3；细钢纤维为细圆形表面镀铜钢纤维，直径为0.18～0.22mm，长度12～14mm。该超高强混凝土抗压强度是高强混凝土的2～4倍，同时具有很高的变形能力；抗折强度是高强混凝土的4‑6倍，掺入纤维后拉压比可达1/6左右；材料内部结构致密、缺陷少，其抗渗等级大于P50、抗冻等级大于F600、电通量小于50库仑，具有极高的耐久性。
Ultrahigh-strength concrete and preparation method thereof
The invention discloses ultrahigh-strength concrete and a preparation method thereof. The ultrahigh-strength concrete is prepared from the following components in percentage by mass: 30 to 45 percent of cement, 15 to 25 percent of composite admixture, 27 to 35 percent of fine aggregate, 3 to 9 percent of fine steel fiber, 2 to 5 percent of polycarboxylic acid water reducing agent, 5 to 8 percent of water and 0.01 percent of active connecting agent, the cement is 42.5 # ordinary Portland cement; the compound admixture mainly comprises active SiO2 and trace elements in a component ratio of 3: 7; the fine aggregate is fine quartz sand with the particle size range of 0-1.25 mm, and the content of coarse sand is 690-810 kg/m < 3 >, the content of medium sand is 300-370 kg/m < 3 >, and the content of fine sand is 105-210 kg/m < 3 > according to the thickness degree; the fine steel fibers are fine round steel fibers with copper-plated surfaces, the diameter of each fine steel fiber is 0.18-0.22 mm, and the length of each fine steel fiber is 12-14 mm. The compressive strength of the ultrahigh-strength concrete is 2-4 times that of high-strength concrete, and meanwhile, the ultrahigh-strength concrete has very high deformability; the breaking strength is 4-6 times that of high-strength concrete, and the tension-compression ratio can reach about 1/6 after fibers are doped; the internal structure of the material is compact, defects are few, the anti-permeability grade of the material is larger than P50, the anti-freezing grade of the material is larger than F600, the electric flux is smaller than 50 coulomb, and the material has extremely high durability.
本发明所公开的超高强混凝土及其制备方法，按各组分的质量百分比计：水泥30％～45％、复合掺和料15％～25％、细骨料27％～35％、细钢纤维3％～9％、聚羧酸系减水剂2％～5％、水5％～8％与活性连接剂0.01％；水泥采用42.5#普通硅酸盐水泥；复合掺和料主要为活性SiO2与微量元素，组分配比为3:7；细骨料为粒径范围为0～1.25mm的细石英砂，按粗细程度计算含量粗砂690～810kg/m3、中砂300～370kg/m3、与细砂105～210kg/m3；细钢纤维为细圆形表面镀铜钢纤维，直径为0.18～0.22mm，长度12～14mm。该超高强混凝土抗压强度是高强混凝土的2～4倍，同时具有很高的变形能力；抗折强度是高强混凝土的4‑6倍，掺入纤维后拉压比可达1/6左右；材料内部结构致密、缺陷少，其抗渗等级大于P50、抗冻等级大于F600、电通量小于50库仑，具有极高的耐久性。
Ultrahigh-strength concrete and preparation method thereof
超高强混凝土及其制备方法
WANG WEIMIN (Autor:in) / LEE JEONG-EUN (Autor:in) / LIAO JIANZHOU (Autor:in) / CHEN FENG (Autor:in) / LI SHAOFU (Autor:in) / JIANG JUN (Autor:in) / WANG LEI (Autor:in) / CHEN ZHUO (Autor:in) / GUO CHAO (Autor:in) / CHEN SONG (Autor:in)
17.11.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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