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A platform for research: civil engineering, architecture and urbanism
Defoaming agent and application thereof in preparation of modified cassava starch-polycarboxylic acid composite water reducing agent
The invention discloses a defoaming agent and application thereof in preparation of a modified cassava starch-polycarboxylic acid composite water reducing agent, and belongs to the field of building materials. The defoaming agent is prepared from the following components in parts by weight: 30 to 65 parts of hydrogen silicone oil, 20 to 40 parts of high-carbon alcohol fatty acid ester compound, 10to 17 parts of polyoxyethylene polyoxypropylene pentaerythritol ether, 10 to 15 parts of octamethylcyclotetrasiloxane, 5 to 9 parts of polyether silicone oil and 3 to 6 parts of polyoxypropylene polyoxyethylene glyceryl ether. The cassava starch is subjected to oxidation, acidification, etherification, grafting, neutralization and other reaction processes to prepare the starch-containing composite water reducing agent. The strength of concrete is reduced by harmful bubbles generated in the concrete, and the quality of the concrete is influenced; the defoaming agent is good in defoaming effect, the harmful bubbles in the concrete can be efficiently eliminated, and air holes influencing the performance are prevented from being formed. When the mixing amount of the water reducing agent is 1%, the initial fluidity of cement paste is larger than 200 mm, and the water reducing agent has a good water reducing effect.
本发明公开了一种消泡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。所述消泡剂以重量份为单位，包括以下组分：氢硅油30‑65份、高碳醇脂肪酸酯复合物20‑40份、聚氧乙烯聚氧丙烯季戊四醇醚10‑17份、八甲基环四硅氧烷10‑15份、聚醚硅油5‑9份和聚氧丙烯聚氧乙烯甘油醚3‑6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。混泥土中产生的有害气泡会使其强度有所降低，影响混泥土的质量，本发明的消泡剂消泡效果较好，能高效的消除混泥土的有害气泡，避免形成对性能有影响的气孔。该减水剂掺量为1%时，水泥净浆初始流动度大于200mm，具有良好的减水效果。
Defoaming agent and application thereof in preparation of modified cassava starch-polycarboxylic acid composite water reducing agent
The invention discloses a defoaming agent and application thereof in preparation of a modified cassava starch-polycarboxylic acid composite water reducing agent, and belongs to the field of building materials. The defoaming agent is prepared from the following components in parts by weight: 30 to 65 parts of hydrogen silicone oil, 20 to 40 parts of high-carbon alcohol fatty acid ester compound, 10to 17 parts of polyoxyethylene polyoxypropylene pentaerythritol ether, 10 to 15 parts of octamethylcyclotetrasiloxane, 5 to 9 parts of polyether silicone oil and 3 to 6 parts of polyoxypropylene polyoxyethylene glyceryl ether. The cassava starch is subjected to oxidation, acidification, etherification, grafting, neutralization and other reaction processes to prepare the starch-containing composite water reducing agent. The strength of concrete is reduced by harmful bubbles generated in the concrete, and the quality of the concrete is influenced; the defoaming agent is good in defoaming effect, the harmful bubbles in the concrete can be efficiently eliminated, and air holes influencing the performance are prevented from being formed. When the mixing amount of the water reducing agent is 1%, the initial fluidity of cement paste is larger than 200 mm, and the water reducing agent has a good water reducing effect.
本发明公开了一种消泡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。所述消泡剂以重量份为单位，包括以下组分：氢硅油30‑65份、高碳醇脂肪酸酯复合物20‑40份、聚氧乙烯聚氧丙烯季戊四醇醚10‑17份、八甲基环四硅氧烷10‑15份、聚醚硅油5‑9份和聚氧丙烯聚氧乙烯甘油醚3‑6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。混泥土中产生的有害气泡会使其强度有所降低，影响混泥土的质量，本发明的消泡剂消泡效果较好，能高效的消除混泥土的有害气泡，避免形成对性能有影响的气孔。该减水剂掺量为1%时，水泥净浆初始流动度大于200mm，具有良好的减水效果。
Defoaming agent and application thereof in preparation of modified cassava starch-polycarboxylic acid composite water reducing agent
消泡剂及其在制备改性木薯淀粉-聚羧酸复合减水剂中的应用
BAN DINGZHI (author) / CHEN QIAN (author) / ZOU ZHIXIU (author) / PAN TINGTING (author)
2020-07-07
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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