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A platform for research: civil engineering, architecture and urbanism
Shrinkage-reducing anti-cracking mass concrete and preparation method thereof
The invention discloses shrinkage-reducing anti-cracking mass concrete and a preparation method thereof. The shrinkage-reducing anti-cracking mass concrete is composed of cement, fly ash, mineral powder, fine aggregate, coarse aggregate, a high-water-absorption water-release composite shrinkage-reducing agent, an additive and water. The high water absorption and release composite shrinkage reducing agent is prepared by the following steps: carrying out free radical polymerization reaction on polyethylene glycol ether acrylate, acrylic acid, acrylamide and 2-acrylamide-2-alkyl propanesulfonic acid to obtain a polymer, and reacting the obtained polymer with a cross-linking agent N, N-methylene bisacrylamide under the action of hydrochloric acid to obtain the high water absorption and release composite shrinkage reducing agent. And adding alkali for neutralization to prepare the water-based adhesive. The mass concrete further solves the problem that the traditional mass concrete is easy to shrink and crack on the basis of meeting the mechanical property and workability, and has a wide application prospect.
本发明公开一种减缩抗裂型大体积混凝土及其制备方法。该减缩抗裂型大体积混凝土由水泥、粉煤灰、矿粉、细集料、粗集料、高吸水释水复合减缩剂、外加剂和水组成，其中高吸水释水复合减缩剂通过将聚乙二醇醚丙烯酸酯与丙烯酸、丙烯酰胺和2‑丙烯酰胺‑2‑烃基丙磺酸进行自由基聚合反应后得到聚合物，所得聚合物再与交联剂N，N‑亚甲基双丙烯酰胺在盐酸作用下，进行交联反应后加碱中和制备得到。该大体积混凝土在满足力学性能和和易性的基础上，进一步解决传统大体积混凝土存在的易收缩开裂的问题，具有广泛的应用前景。
Shrinkage-reducing anti-cracking mass concrete and preparation method thereof
The invention discloses shrinkage-reducing anti-cracking mass concrete and a preparation method thereof. The shrinkage-reducing anti-cracking mass concrete is composed of cement, fly ash, mineral powder, fine aggregate, coarse aggregate, a high-water-absorption water-release composite shrinkage-reducing agent, an additive and water. The high water absorption and release composite shrinkage reducing agent is prepared by the following steps: carrying out free radical polymerization reaction on polyethylene glycol ether acrylate, acrylic acid, acrylamide and 2-acrylamide-2-alkyl propanesulfonic acid to obtain a polymer, and reacting the obtained polymer with a cross-linking agent N, N-methylene bisacrylamide under the action of hydrochloric acid to obtain the high water absorption and release composite shrinkage reducing agent. And adding alkali for neutralization to prepare the water-based adhesive. The mass concrete further solves the problem that the traditional mass concrete is easy to shrink and crack on the basis of meeting the mechanical property and workability, and has a wide application prospect.
本发明公开一种减缩抗裂型大体积混凝土及其制备方法。该减缩抗裂型大体积混凝土由水泥、粉煤灰、矿粉、细集料、粗集料、高吸水释水复合减缩剂、外加剂和水组成，其中高吸水释水复合减缩剂通过将聚乙二醇醚丙烯酸酯与丙烯酸、丙烯酰胺和2‑丙烯酰胺‑2‑烃基丙磺酸进行自由基聚合反应后得到聚合物，所得聚合物再与交联剂N，N‑亚甲基双丙烯酰胺在盐酸作用下，进行交联反应后加碱中和制备得到。该大体积混凝土在满足力学性能和和易性的基础上，进一步解决传统大体积混凝土存在的易收缩开裂的问题，具有广泛的应用前景。
Shrinkage-reducing anti-cracking mass concrete and preparation method thereof
一种减缩抗裂型大体积混凝土及其制备方法
ZHOU BORU (author) / ZHAO RIXU (author) / XIONG LONG (author) / BAO MING (author) / HUANG CAN (author) / YU KUN (author) / LIU YANQI (author) / DONG JISHU (author)
2024-02-23
Patent
Electronic Resource
Chinese
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