一种混凝土快速修复材料的组成设计研究
A Study of the Composition Design for a Rapid Repairing Material
  
中文关键词:混凝土  快速修复材料  抗折强度  抗压强度  乳液
英文关键词:concrete  rapid repairing materials  flexural strength  compressive strength  emulsion
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作者单位
王慧 中建安装集团有限公司江苏南京210023 
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中文摘要:
      通过单因素试验,确定了快速修复材料中减水剂、早强剂、缓凝剂、消泡剂、石膏等组成材料的适宜掺量。利用正交设计实验,考核修复材料的4 h、1 d抗折及抗压强度,选取最优水平,确定了配制快速修复材料的最优条件:胶砂比为1∶1.3,细骨料为Ⅱ区天然砂,乳液种类为聚丙烯酸酯—聚氨酯共聚物,聚灰比为3%,水胶比0.30,石膏掺量6%,减水剂1.5%,早强剂1%,缓凝剂0.12%,消泡剂0.1%。以上述条件配制的快速修复材料4 h抗压/抗折强度为37.0/6.90 MPa,1 d抗压/抗折强度为68.8/11.42 MPa。所配制的浆体流动性达310 mm,可实现自流平和用于压浆灌注裂缝。
英文摘要:
      By single factor experiments, the suitable content of water reducing agent, hardening accelerator, retarder, defoamer, gypsum and other components in the rapid repairing material is determined. The orthogonal design experiments are carried out to evaluate the flexural and compressive strength of the rapid repairing materials(4 h and 1 d), with the optimum conditions chosen, upon the basis of which the optimum conditions for preparing of rapid repairing materials are determined: the ratio of cement to sand is 1∶1.3, the fine aggregate is the natural sand in Zone Ⅱ, the Polyacrylate Polyurethane Copolymer is used as the emulsion, the ratio of polymer to cement is 3%, the water to cement ratio is 0.30, the dosage of gypsum content is 6%, the dosage of water reducer is 1.5%, and the dosage of hardening accelerator is 1%,the dosage of retarder is 0.12% and the dosage of defoamer is 0.1%. The results show that, when the rapid repairing material is prepared under the above mentioned conditions, the compressive / flexural strength of 4 h is 37.0/6.90 MPa, and that of 1 d is 68.8/11.42 MPa. The fluidity of the prepared slurry is 310 mm, which can realize self leveling and thus can be used for grouting cracks.
王慧.一种混凝土快速修复材料的组成设计研究[J].国防交通工程与技术,2021,19(1):26~29
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