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A platform for research: civil engineering, architecture and urbanism
Air entraining agent and application thereof in preparation of modified cassava starch-polycarboxylic acid composite water reducing agent
The invention discloses an air entraining agent and application of the air entraining agent in preparation of a modified cassava starch-polycarboxylic acid composite water reducing agent, and belongsto the field of building materials. The air entraining agent is prepared from the following components in parts by weight: 48 to 60 parts of rosin powder, 38 to 55 parts of p-toluenesulfonic acid, 25to 37 parts of sodium hydroxide, 18 to 22 parts of pentaerythritol, 7 to 14 parts of tall oil and 5 to 9 parts of petroleum sulfonate. The cassava starch is subjected to oxidation, acidification, etherification, grafting, neutralization and other reaction processes to prepare the starch-containing composite water reducing agent. By adopting the air entraining agent disclosed by the invention, bubbles in concrete can be proper and stable in size, and meanwhile, the compressive strength of the concrete is remarkably improved. The content of the modified cassava starch in the composite water reducing agent reaches 20% or above, and when the mixing amount of the water reducing agent is 0.3%, the coagulation time is longer than 24 h, and the requirement of the super retarder is met.
本发明公开了一种引气剂及其在制备改性木薯淀粉‑聚羧酸复合减水剂中的应用，属于建筑材料领域。所述引气剂以重量份为单位，包括以下组分：松香粉48‑60份、对甲苯磺酸38‑55份、氢氧化钠25‑37份、季戊四醇18‑22份、妥尔油7‑14份和石油磺酸盐5‑9份。木薯淀粉通过氧化、酸化、醚化、接枝、中和等反应工序制成含淀粉复合减水剂。采用本发明的引气剂，可以使混泥土内气泡大小合适、稳定，同时显著提高混泥土的抗压强度。改性木薯淀粉在复合减水剂中的含量达20%以上，当减水剂掺量为0.3％时，凝结时间已超过24h，达到超缓凝剂的要求。
Air entraining agent and application thereof in preparation of modified cassava starch-polycarboxylic acid composite water reducing agent
The invention discloses an air entraining agent and application of the air entraining agent in preparation of a modified cassava starch-polycarboxylic acid composite water reducing agent, and belongsto the field of building materials. The air entraining agent is prepared from the following components in parts by weight: 48 to 60 parts of rosin powder, 38 to 55 parts of p-toluenesulfonic acid, 25to 37 parts of sodium hydroxide, 18 to 22 parts of pentaerythritol, 7 to 14 parts of tall oil and 5 to 9 parts of petroleum sulfonate. The cassava starch is subjected to oxidation, acidification, etherification, grafting, neutralization and other reaction processes to prepare the starch-containing composite water reducing agent. By adopting the air entraining agent disclosed by the invention, bubbles in concrete can be proper and stable in size, and meanwhile, the compressive strength of the concrete is remarkably improved. The content of the modified cassava starch in the composite water reducing agent reaches 20% or above, and when the mixing amount of the water reducing agent is 0.3%, the coagulation time is longer than 24 h, and the requirement of the super retarder is met.
本发明公开了一种引气剂及其在制备改性木薯淀粉‑聚羧酸复合减水剂中的应用，属于建筑材料领域。所述引气剂以重量份为单位，包括以下组分：松香粉48‑60份、对甲苯磺酸38‑55份、氢氧化钠25‑37份、季戊四醇18‑22份、妥尔油7‑14份和石油磺酸盐5‑9份。木薯淀粉通过氧化、酸化、醚化、接枝、中和等反应工序制成含淀粉复合减水剂。采用本发明的引气剂，可以使混泥土内气泡大小合适、稳定，同时显著提高混泥土的抗压强度。改性木薯淀粉在复合减水剂中的含量达20%以上，当减水剂掺量为0.3％时，凝结时间已超过24h，达到超缓凝剂的要求。
Air entraining agent and application thereof in preparation of modified cassava starch-polycarboxylic acid composite water reducing agent
引气剂及其在制备改性木薯淀粉-聚羧酸复合减水剂中的应用
ZHU FANGWEN (author) / XIAO NINGZHEN (author) / CHEN YONG (author) / LONG YING (author)
2020-07-07
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
| European Patent Office | 2020
Modified cassava starch-polycarboxylic acid composite water reducing agent
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Preparation process of modified cassava starch-polycarboxylic acid composite water reducing agent
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Concrete containing modified cassava starch-polycarboxylic acid composite water reducing agent
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