A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Premixing process of concrete
The invention discloses a concrete pre-mixing process, which comprises the following steps: compounding 45 parts by weight of hyperbranched polyethyleneimine, 35 parts by weight of a quaternary ammonium salt and 5 parts by weight of guar gum to prepare a concrete anti-flocculating agent; cleaning gravel with water, separating the gravel from muddy water for cleaning the gravel, carrying out sedimentation and filter pressing on the muddy water on an assembly line through a polymeric flocculant aqueous solution, and separating water; and pouring the cleaned gravel and a cementing material into a stirring pot according to the mixing proportion, and starting a stirrer for stirring; if the gravel is cleaned with water, directly adding water according to the mixing ratio, finally adding 1.0-2.0% of a polycarboxylic acid water reducing agent into the stirring pot, continuously stirring for 60-90 seconds, and stopping stirring; and if the gravel is cleaned by separated water, preparing a concrete anti-flocculating agent aqueous solution with the concentration of 1% according to a mixing ratio, pouring into the stirring pot, adding water according to a mixing ratio, stirring for 30 seconds, adding 1.0-2.0% of a polycarboxylate superplasticizer into the stirring pot, continuously stirring for 60-90 seconds, and stopping stirring.
本发明公开了一种混凝土的预拌工艺，按重量份计，将45份的超支化聚乙烯亚胺、35份的季铵盐和5份的瓜尔胶复配制得混凝土抗絮凝剂，先用水对砂石进行清洗，将砂石与清洗砂石的泥水分离，泥水用高分子絮凝剂水溶液在流水线上进行沉降和压滤，并分离出水，将清洗后的砂石和胶凝材料按配合比投放于搅拌锅内，开启搅拌器进行搅拌；如果砂石是用水清洗的，直接投加配合比的水，最后向搅拌锅内投加1.0～2.0％的聚羧酸减水剂继续搅拌60～90s后停止搅拌即可；如果是用分离水清洗的砂石，取配合比的混凝土抗絮凝剂，并将其配置成1％浓度的水溶液投加于搅拌锅内，再投加配合比的水搅拌30s后，向搅拌锅内投加1.0～2.0％的聚羧酸减水剂继续搅拌60～90s后停止搅拌即可。
Premixing process of concrete
The invention discloses a concrete pre-mixing process, which comprises the following steps: compounding 45 parts by weight of hyperbranched polyethyleneimine, 35 parts by weight of a quaternary ammonium salt and 5 parts by weight of guar gum to prepare a concrete anti-flocculating agent; cleaning gravel with water, separating the gravel from muddy water for cleaning the gravel, carrying out sedimentation and filter pressing on the muddy water on an assembly line through a polymeric flocculant aqueous solution, and separating water; and pouring the cleaned gravel and a cementing material into a stirring pot according to the mixing proportion, and starting a stirrer for stirring; if the gravel is cleaned with water, directly adding water according to the mixing ratio, finally adding 1.0-2.0% of a polycarboxylic acid water reducing agent into the stirring pot, continuously stirring for 60-90 seconds, and stopping stirring; and if the gravel is cleaned by separated water, preparing a concrete anti-flocculating agent aqueous solution with the concentration of 1% according to a mixing ratio, pouring into the stirring pot, adding water according to a mixing ratio, stirring for 30 seconds, adding 1.0-2.0% of a polycarboxylate superplasticizer into the stirring pot, continuously stirring for 60-90 seconds, and stopping stirring.
本发明公开了一种混凝土的预拌工艺，按重量份计，将45份的超支化聚乙烯亚胺、35份的季铵盐和5份的瓜尔胶复配制得混凝土抗絮凝剂，先用水对砂石进行清洗，将砂石与清洗砂石的泥水分离，泥水用高分子絮凝剂水溶液在流水线上进行沉降和压滤，并分离出水，将清洗后的砂石和胶凝材料按配合比投放于搅拌锅内，开启搅拌器进行搅拌；如果砂石是用水清洗的，直接投加配合比的水，最后向搅拌锅内投加1.0～2.0％的聚羧酸减水剂继续搅拌60～90s后停止搅拌即可；如果是用分离水清洗的砂石，取配合比的混凝土抗絮凝剂，并将其配置成1％浓度的水溶液投加于搅拌锅内，再投加配合比的水搅拌30s后，向搅拌锅内投加1.0～2.0％的聚羧酸减水剂继续搅拌60～90s后停止搅拌即可。
Premixing process of concrete
一种混凝土的预拌工艺
A GUANGQIANG (author) / SU YULING (author) / LI JINMEI (author) / TANG KAI (author) / HE PENG (author) / CHEN ZHIXIANG (author) / XU XING'AI (author)
2021-07-13
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
Importance of cement paste premixing in practice of concrete mixing
| Engineering Index Backfile | 1960