A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Fiber high-strength recycled concrete
The invention relates to fiber high-strength recycled concrete which comprises the following components in parts by weight: 300-400 parts of cement; 2-3 parts of a polycarboxylate superplasticizer; 40 to 50 parts of fly ash; 150 to 160 parts of water; 600 to 700 parts of sand; 30 to 100 parts of mineral powder; 1100 to 1200 parts of natural coarse aggregate; 1100 to 1200 parts of recycled coarse aggregate; and 30-120 parts of a fiber filler. The fiber filler is formed by mixing steel fibers, polyvinyl alcohol cellulose and polypropylene composite nano calcium carbonate splines. The polypropylene composite nano calcium carbonate is prepared by the following steps: adding dried nano calcium carbonate into a mixed solution of gamma-glycidoxypropyltrimethoxysilane (KH-560) and absolute ethyl alcohol, and reacting to obtain surface modified nano calcium carbonate. Polypropylene, an antioxidant, talcum powder and modified nano calcium carbonate are put into a double-screw extruder and subjected to injection molding, and the polypropylene composite nano calcium carbonate sample strip is obtained. The high-strength recycled concrete disclosed by the invention has the advantages of high compressive strength, high breaking strength, high elastic modulus and good anti-cracking performance.
本发明涉及一种纤维高强再生混凝土，它包括如下重量份数的组分：水泥300‑400份；聚羧酸减水剂2‑3份；粉煤灰40‑50份；水150‑160份；砂子600‑700份；矿粉30‑100份；天然粗骨料1100‑1200份；再生粗骨料1100‑1200份；纤维填料30‑120份。纤维填料由钢纤维、聚乙烯醇纤维素及聚丙烯复合纳米碳酸钙样条混合组成。聚丙烯复合纳米碳酸钙通过如下步骤制备获得：将干燥的纳米碳酸钙加入γ‑缩水甘油醚氧丙基三甲氧基硅烷（KH‑560）与无水乙醇的混合液反应得到表面改性处理的纳米碳酸钙。将聚丙烯、抗氧剂、滑石粉及改性纳米碳酸钙投入到双螺杆挤出机中并注塑成型得到聚丙烯复合纳米碳酸钙样条。本发明的高强再生混凝土具有抗压强度高、抗折强度高、弹性模量高及抗开裂性能良好的优点。
Fiber high-strength recycled concrete
The invention relates to fiber high-strength recycled concrete which comprises the following components in parts by weight: 300-400 parts of cement; 2-3 parts of a polycarboxylate superplasticizer; 40 to 50 parts of fly ash; 150 to 160 parts of water; 600 to 700 parts of sand; 30 to 100 parts of mineral powder; 1100 to 1200 parts of natural coarse aggregate; 1100 to 1200 parts of recycled coarse aggregate; and 30-120 parts of a fiber filler. The fiber filler is formed by mixing steel fibers, polyvinyl alcohol cellulose and polypropylene composite nano calcium carbonate splines. The polypropylene composite nano calcium carbonate is prepared by the following steps: adding dried nano calcium carbonate into a mixed solution of gamma-glycidoxypropyltrimethoxysilane (KH-560) and absolute ethyl alcohol, and reacting to obtain surface modified nano calcium carbonate. Polypropylene, an antioxidant, talcum powder and modified nano calcium carbonate are put into a double-screw extruder and subjected to injection molding, and the polypropylene composite nano calcium carbonate sample strip is obtained. The high-strength recycled concrete disclosed by the invention has the advantages of high compressive strength, high breaking strength, high elastic modulus and good anti-cracking performance.
本发明涉及一种纤维高强再生混凝土，它包括如下重量份数的组分：水泥300‑400份；聚羧酸减水剂2‑3份；粉煤灰40‑50份；水150‑160份；砂子600‑700份；矿粉30‑100份；天然粗骨料1100‑1200份；再生粗骨料1100‑1200份；纤维填料30‑120份。纤维填料由钢纤维、聚乙烯醇纤维素及聚丙烯复合纳米碳酸钙样条混合组成。聚丙烯复合纳米碳酸钙通过如下步骤制备获得：将干燥的纳米碳酸钙加入γ‑缩水甘油醚氧丙基三甲氧基硅烷（KH‑560）与无水乙醇的混合液反应得到表面改性处理的纳米碳酸钙。将聚丙烯、抗氧剂、滑石粉及改性纳米碳酸钙投入到双螺杆挤出机中并注塑成型得到聚丙烯复合纳米碳酸钙样条。本发明的高强再生混凝土具有抗压强度高、抗折强度高、弹性模量高及抗开裂性能良好的优点。
Fiber high-strength recycled concrete
一种纤维高强再生混凝土
FENG AIQUAN (author) / SHEN HONGWEI (author) / ZHONG QIKANG (author) / XU QIJIA (author)
2023-10-10
Patent
Electronic Resource
Chinese
High-strength fiber recycled concrete and preparation method thereof
| European Patent Office | 2024
| European Patent Office | 2024