A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Recycled concrete and preparation method thereof
The invention relates to recycled concrete and a preparation method thereof, and belongs to the technical field of concrete. The recycled concrete comprises (by weight): 150-280 parts of cement, 90-130 parts of water, 800-950 parts of modified recycled coarse aggregate, 400-530 parts of fine aggregate, 40-85 parts of fly ash, 80-100 parts of mineral powder, 50-140 parts of zeolite powder, 30-60 parts of epoxy resin, 4-10 parts of a water reducing agent and 2-6 parts of an air entraining agent. The preparation method of the modified recycled coarse aggregate comprises the following steps: S1, crushing and screening waste concrete to obtain recycled coarse aggregate; S2, soaking the recycled coarse aggregate obtained in the step S1 in an acetic acid solution with the mass concentration of 2-7%, and airing; S3, stirring 80-110 parts of polyvinyl alcohol, 60-110 parts of silica fume, 40-80 parts of sodium silicate and 800-1,000 parts of water to obtain a modified liquid; and S4, soaking the recycled coarse aggregate obtained in the step S2 in the modified liquid obtained in the step S3, taking out the soaked recycled coarse aggregate, and baking the recycled coarse aggregate to obtainthe modified recycled coarse aggregate. The recycled concrete provided by the invention has a good compressive strength effect.
本发明涉及一种再生混凝土及其制备方法，属于混凝土技术领域。按重量份计，再生混凝土包含有水泥150‑280份，水90‑130份，改性再生粗骨料800‑950份，细骨料400‑530份，粉煤灰40‑85份，矿粉80‑100份，沸石粉50‑140份，环氧树脂30‑60份，减水剂4‑10份，引气剂2‑6份；改性再生粗骨料的制备方法包括如下步骤：S1：取废旧混凝土，破碎、筛分后得到再生粗骨料；S2：将步骤S1中的再生粗骨料浸入质量浓度为2‑7%的醋酸溶液中浸泡后，晾干；S3：将80‑110份聚乙烯醇、60‑110份硅灰、40‑80份硅酸钠和800‑1000份的水进行搅拌得改性液；S4：将步骤S2中得到的再生粗骨料浸泡至步骤S3中的改性液中浸泡后，取出烘烤，得到改性再生粗骨料。本发明的再生混凝土具有较好的抗压强度的效果。
Recycled concrete and preparation method thereof
The invention relates to recycled concrete and a preparation method thereof, and belongs to the technical field of concrete. The recycled concrete comprises (by weight): 150-280 parts of cement, 90-130 parts of water, 800-950 parts of modified recycled coarse aggregate, 400-530 parts of fine aggregate, 40-85 parts of fly ash, 80-100 parts of mineral powder, 50-140 parts of zeolite powder, 30-60 parts of epoxy resin, 4-10 parts of a water reducing agent and 2-6 parts of an air entraining agent. The preparation method of the modified recycled coarse aggregate comprises the following steps: S1, crushing and screening waste concrete to obtain recycled coarse aggregate; S2, soaking the recycled coarse aggregate obtained in the step S1 in an acetic acid solution with the mass concentration of 2-7%, and airing; S3, stirring 80-110 parts of polyvinyl alcohol, 60-110 parts of silica fume, 40-80 parts of sodium silicate and 800-1,000 parts of water to obtain a modified liquid; and S4, soaking the recycled coarse aggregate obtained in the step S2 in the modified liquid obtained in the step S3, taking out the soaked recycled coarse aggregate, and baking the recycled coarse aggregate to obtainthe modified recycled coarse aggregate. The recycled concrete provided by the invention has a good compressive strength effect.
本发明涉及一种再生混凝土及其制备方法，属于混凝土技术领域。按重量份计，再生混凝土包含有水泥150‑280份，水90‑130份，改性再生粗骨料800‑950份，细骨料400‑530份，粉煤灰40‑85份，矿粉80‑100份，沸石粉50‑140份，环氧树脂30‑60份，减水剂4‑10份，引气剂2‑6份；改性再生粗骨料的制备方法包括如下步骤：S1：取废旧混凝土，破碎、筛分后得到再生粗骨料；S2：将步骤S1中的再生粗骨料浸入质量浓度为2‑7%的醋酸溶液中浸泡后，晾干；S3：将80‑110份聚乙烯醇、60‑110份硅灰、40‑80份硅酸钠和800‑1000份的水进行搅拌得改性液；S4：将步骤S2中得到的再生粗骨料浸泡至步骤S3中的改性液中浸泡后，取出烘烤，得到改性再生粗骨料。本发明的再生混凝土具有较好的抗压强度的效果。
Recycled concrete and preparation method thereof
一种再生混凝土及其制备方法
LUO YANG (author) / DENG XIAOFEI (author) / ZHANG WEI (author)
2020-04-21
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
Recycled concrete, recycled concrete prefabricated part and preparation method thereof
| European Patent Office | 2021