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A platform for research: civil engineering, architecture and urbanism
Elastic and tough cement-based composite material for rapidly repairing bridge expansion joint anchoring concrete
The invention discloses an elastic and tough cement-based composite material for rapidly repairing bridge expansion joint anchoring concrete, which comprises the following components in parts by weight: 350-450 parts of road Portland cement, 20-50 parts of rapid hardening sulphoaluminate cement, 25-40 parts of a concrete expansive agent, 10-25 parts of silica fume, 20-50 parts of fly ash, 450-550 parts of quartz sand, 5-15 parts of rubber powder, 10-30 parts of styrene-acrylic rubber powder and 0.5-1.2 parts of a retarder. The concrete is prepared from the following components in parts by weight: 0.5-1.0 part of a hardening accelerator, 1.5-3.5 parts of a water reducing agent, 0.15-0.30 part of a plastic expanding agent, 0.4-0.8 part of a defoaming agent and 4-8 parts of composite functional fibers. According to the repairing material, the special Portland cement and quick-hardening sulphoaluminate cement composite cementing material for the road is adopted as a main body, the silicon powder, the fly ash and other additives are combined for modification, and then the vulcanized rubber powder, the styrene-acrylic polymer rubber powder, the composite functional fibers and other auxiliaries are added, so that the repairing material has good repairing performance under the condition of relatively high early-stage and later-stage strength; meanwhile, the concrete has better impact resistance, elasticity and toughness, wear resistance and durability, and can meet the requirements of rapid repair and long service life of bridge expansion joint anchoring concrete.
本发明公开了桥梁伸缩缝锚固混凝土快速修复用弹韧性水泥基复合材料，包括如下重量份数组分：道路硅酸盐水泥350‑450份，快硬硫铝酸盐水泥20‑50份，混凝土膨胀剂25‑40份，硅灰10‑25份，粉煤灰20‑50份，石英砂450‑550份，橡胶粉5‑15份，苯丙胶粉10‑30份，缓凝剂0.5‑1.2份，促硬剂0.5‑1.0份，减水剂1.5‑3.5份，塑性膨胀剂0.15‑0.30份，消泡剂0.4‑0.8份，复合功能纤维4‑8份。本发明采用道路专用硅酸盐水泥和快硬硫铝酸盐水泥复合胶凝材料作为主体，结合硅粉、粉煤灰等外加剂进行改性，再通过加入硫化橡胶粉、苯丙聚合物胶粉、复合功能纤维及其他助剂，使修补材料在具有较强的早期及后期强度条件下，同时拥有较优的抗冲击性、弹韧性、耐磨性、耐久性，能满足桥梁伸缩缝锚固混凝土快速修补及长期服役寿命要求。
Elastic and tough cement-based composite material for rapidly repairing bridge expansion joint anchoring concrete
The invention discloses an elastic and tough cement-based composite material for rapidly repairing bridge expansion joint anchoring concrete, which comprises the following components in parts by weight: 350-450 parts of road Portland cement, 20-50 parts of rapid hardening sulphoaluminate cement, 25-40 parts of a concrete expansive agent, 10-25 parts of silica fume, 20-50 parts of fly ash, 450-550 parts of quartz sand, 5-15 parts of rubber powder, 10-30 parts of styrene-acrylic rubber powder and 0.5-1.2 parts of a retarder. The concrete is prepared from the following components in parts by weight: 0.5-1.0 part of a hardening accelerator, 1.5-3.5 parts of a water reducing agent, 0.15-0.30 part of a plastic expanding agent, 0.4-0.8 part of a defoaming agent and 4-8 parts of composite functional fibers. According to the repairing material, the special Portland cement and quick-hardening sulphoaluminate cement composite cementing material for the road is adopted as a main body, the silicon powder, the fly ash and other additives are combined for modification, and then the vulcanized rubber powder, the styrene-acrylic polymer rubber powder, the composite functional fibers and other auxiliaries are added, so that the repairing material has good repairing performance under the condition of relatively high early-stage and later-stage strength; meanwhile, the concrete has better impact resistance, elasticity and toughness, wear resistance and durability, and can meet the requirements of rapid repair and long service life of bridge expansion joint anchoring concrete.
本发明公开了桥梁伸缩缝锚固混凝土快速修复用弹韧性水泥基复合材料，包括如下重量份数组分：道路硅酸盐水泥350‑450份，快硬硫铝酸盐水泥20‑50份，混凝土膨胀剂25‑40份，硅灰10‑25份，粉煤灰20‑50份，石英砂450‑550份，橡胶粉5‑15份，苯丙胶粉10‑30份，缓凝剂0.5‑1.2份，促硬剂0.5‑1.0份，减水剂1.5‑3.5份，塑性膨胀剂0.15‑0.30份，消泡剂0.4‑0.8份，复合功能纤维4‑8份。本发明采用道路专用硅酸盐水泥和快硬硫铝酸盐水泥复合胶凝材料作为主体，结合硅粉、粉煤灰等外加剂进行改性，再通过加入硫化橡胶粉、苯丙聚合物胶粉、复合功能纤维及其他助剂，使修补材料在具有较强的早期及后期强度条件下，同时拥有较优的抗冲击性、弹韧性、耐磨性、耐久性，能满足桥梁伸缩缝锚固混凝土快速修补及长期服役寿命要求。
Elastic and tough cement-based composite material for rapidly repairing bridge expansion joint anchoring concrete
桥梁伸缩缝锚固混凝土快速修复用弹韧性水泥基复合材料
SUN KUN (author) / LIANG YONG (author) / JING KE (author) / HU ANQING (author) / DENG CHANGJUN (author) / REN DONGHUA (author) / CAO WEN (author) / SUN TAO (author) / ZHAO JIONG (author)
2024-04-19
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
Road concrete bridge expansion joint transition area repairing structure
| European Patent Office | 2023