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A platform for research: civil engineering, architecture and urbanism
Polymer composite shrinkage reducing agent for concrete/mortar
The invention discloses a polymer composite shrinkage reducing agent for concrete/mortar, and belongs to the field of composite shrinkage reducing agents. The shrinkage reducing agent is formed by compounding a water-absorbing polymer and a hydrophobic polymer and has a submicroscopic semi-interpenetrating/interpenetrating network structure, the water-absorbing polymer forms a cross-linked network, and network gaps are filled with the hydrophobic polymer. The water absorption rate of the shrinkage reducing agent is 20%-150% (wt.), and self-shrinkage and dry shrinkage can be effectively reducedwhen the shrinkage reducing agent is doped into concrete/mortar. The mixing amount of the shrinkage reducing agent is 1.5 wt%-9.5 wt% of the total mass of a cementing material, and the shrinkage reducing agent is added in a dry mixing mode, so that the workability of concrete/mortar is not influenced, the influence on the mechanical strength of the concrete/mortar is small, the cracking resistance and freeze-thaw resistance of the concrete/mortar can be improved, and the durability of the concrete/mortar is improved.
一种用于混凝土/砂浆的聚合物复合减缩剂属于复合减缩剂领域。该减缩剂由吸水性聚合物和疏水性聚合物复合而成，具有亚微观半互穿/互穿网络结构，吸水性聚合物形成交联网络，疏水性聚合物填充在网络空隙中。该减缩剂吸水率为20％～150％(wt.)，掺入混凝土/砂浆中能够有效减少自收缩和干燥收缩。该减缩剂掺量为胶凝材料总质量的1.5wt％～9.5wt％，以干掺方式加入，不影响混凝土/砂浆工作性，对混凝土/砂浆力学强度影响小，可改善混凝土/砂浆的抗开裂及抗冻融性能，提高其耐久性。
Polymer composite shrinkage reducing agent for concrete/mortar
The invention discloses a polymer composite shrinkage reducing agent for concrete/mortar, and belongs to the field of composite shrinkage reducing agents. The shrinkage reducing agent is formed by compounding a water-absorbing polymer and a hydrophobic polymer and has a submicroscopic semi-interpenetrating/interpenetrating network structure, the water-absorbing polymer forms a cross-linked network, and network gaps are filled with the hydrophobic polymer. The water absorption rate of the shrinkage reducing agent is 20%-150% (wt.), and self-shrinkage and dry shrinkage can be effectively reducedwhen the shrinkage reducing agent is doped into concrete/mortar. The mixing amount of the shrinkage reducing agent is 1.5 wt%-9.5 wt% of the total mass of a cementing material, and the shrinkage reducing agent is added in a dry mixing mode, so that the workability of concrete/mortar is not influenced, the influence on the mechanical strength of the concrete/mortar is small, the cracking resistance and freeze-thaw resistance of the concrete/mortar can be improved, and the durability of the concrete/mortar is improved.
一种用于混凝土/砂浆的聚合物复合减缩剂属于复合减缩剂领域。该减缩剂由吸水性聚合物和疏水性聚合物复合而成，具有亚微观半互穿/互穿网络结构，吸水性聚合物形成交联网络，疏水性聚合物填充在网络空隙中。该减缩剂吸水率为20％～150％(wt.)，掺入混凝土/砂浆中能够有效减少自收缩和干燥收缩。该减缩剂掺量为胶凝材料总质量的1.5wt％～9.5wt％，以干掺方式加入，不影响混凝土/砂浆工作性，对混凝土/砂浆力学强度影响小，可改善混凝土/砂浆的抗开裂及抗冻融性能，提高其耐久性。
Polymer composite shrinkage reducing agent for concrete/mortar
一种用于混凝土/砂浆的聚合物复合减缩剂
MAO QIANJIN (author) / QI WENJING (author) / WANG ZIMING (author) / WU WENWEN (author) / HUANG LINA (author) / CUI SUPING (author)
2020-06-16
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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