Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Low-self-shrinkage ultra-high performance concrete and preparation method thereof
The invention discloses low-self-shrinkage ultra-high performance concrete and a preparation method thereof, relates to ultra-high performance concrete and a preparation method thereof, and aims to solve the problem of high early-stage self-shrinkage of existing UHPC (Ultra High Performance Concrete). The low-self-shrinkage ultra-high performance concrete is prepared from sisal fiber powder, P.O 42.5 ordinary Portland cement, silica fume, coarse quartz sand, fine quartz sand, steel fibers, a polycarboxylate superplasticizer and water. Wherein the adding amount of the sisal fiber powder is 1%-3% of the volume of the concrete. The preparation method comprises the following steps: firstly pretreating the sisal fiber powder, then performing dry mixing with the cement, the silica fume, the fine sand and the coarse sand, then adding the polycarboxylate superplasticizer and the water, stirring, and finally adding the steel fibers, and uniformly stirring to obtain the low-self-shrinkage ultra-high performance concrete. The 28-day compressive strength of the concrete is 102-120 MPa, the bending strength of the concrete is 20-24 MPa, the toughness of the concrete is 12-14 kNmm, the 7-day self-shrinkage of the concrete is 644-350 mu epsilon, and the concrete can be applied to the field of buildings.
一种低自收缩超高性能混凝土及其制备方法，它涉及超高性能混凝土及其制备方法，它是要解决现有的UHPC早期自收缩大的问题。本发明的低自收缩超高性能混凝土包括：剑麻纤维粉、P·O 42.5普通硅酸盐水泥、硅灰、粗石英砂、细石英砂、钢纤维、聚羧酸高效减水剂和水；其中剑麻纤维粉的加入量按混凝土体积的1%~3%。制法：先将剑麻纤维粉预处理，然后与水泥、硅灰、细砂和粗砂干拌，再加入聚羧酸高效减水剂和水搅拌，最后加入钢纤维搅拌均匀，得到低自收缩超高性能混凝土。该混凝土28天抗压强度102~120 MPa，弯曲强度20~24 MPa，韧性12~14 kN•mm，7天自收缩为644~350με，可用于建筑领域。
Low-self-shrinkage ultra-high performance concrete and preparation method thereof
The invention discloses low-self-shrinkage ultra-high performance concrete and a preparation method thereof, relates to ultra-high performance concrete and a preparation method thereof, and aims to solve the problem of high early-stage self-shrinkage of existing UHPC (Ultra High Performance Concrete). The low-self-shrinkage ultra-high performance concrete is prepared from sisal fiber powder, P.O 42.5 ordinary Portland cement, silica fume, coarse quartz sand, fine quartz sand, steel fibers, a polycarboxylate superplasticizer and water. Wherein the adding amount of the sisal fiber powder is 1%-3% of the volume of the concrete. The preparation method comprises the following steps: firstly pretreating the sisal fiber powder, then performing dry mixing with the cement, the silica fume, the fine sand and the coarse sand, then adding the polycarboxylate superplasticizer and the water, stirring, and finally adding the steel fibers, and uniformly stirring to obtain the low-self-shrinkage ultra-high performance concrete. The 28-day compressive strength of the concrete is 102-120 MPa, the bending strength of the concrete is 20-24 MPa, the toughness of the concrete is 12-14 kNmm, the 7-day self-shrinkage of the concrete is 644-350 mu epsilon, and the concrete can be applied to the field of buildings.
一种低自收缩超高性能混凝土及其制备方法，它涉及超高性能混凝土及其制备方法，它是要解决现有的UHPC早期自收缩大的问题。本发明的低自收缩超高性能混凝土包括：剑麻纤维粉、P·O 42.5普通硅酸盐水泥、硅灰、粗石英砂、细石英砂、钢纤维、聚羧酸高效减水剂和水；其中剑麻纤维粉的加入量按混凝土体积的1%~3%。制法：先将剑麻纤维粉预处理，然后与水泥、硅灰、细砂和粗砂干拌，再加入聚羧酸高效减水剂和水搅拌，最后加入钢纤维搅拌均匀，得到低自收缩超高性能混凝土。该混凝土28天抗压强度102~120 MPa，弯曲强度20~24 MPa，韧性12~14 kN•mm，7天自收缩为644~350με，可用于建筑领域。
Low-self-shrinkage ultra-high performance concrete and preparation method thereof
一种低自收缩超高性能混凝土及其制备方法
GAO XIAOJIAN (Autor:in) / REN GUOSHENG (Autor:in) / CHEN TIEFENG (Autor:in)
24.11.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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