Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
High-durability recycled concrete and preparation method thereof
The invention relates to the technical field of concrete, and particularly discloses high-durability recycled concrete and a preparation method thereof. The high-durability recycled concrete is obtained by putting a concrete mixture into a mold for curing, and the concrete mixture is prepared from the following components in parts by weight: 260 to 280 parts of Portland cement, 30 to 50 parts of fly ash, 1100 to 1200 parts of recycled coarse aggregate, 850 to 870 parts of modified recycled fine aggregate, 162 to 166 parts of water and 2.9 to 3.3 parts of polycarboxylate superplasticizer, the modified recycled fine aggregate is obtained by copolymerizing recycled fine aggregate with vinyl grafted on the surface and maleic acid polyvinyl alcohol ester. In the recycled concrete, the permeation of chloride ions is blocked, and the drying shrinkage of the recycled concrete is reduced, so that the durability of the recycled concrete is improved.
本申请涉混凝土技术领域，具体公开了一种高耐久性再生混凝土及其制备方法。所述高耐久性再生混凝土由混凝土拌和物经过入模养护后得到，所述混凝土拌和物包括如下重量份的组分：硅酸盐水泥260‑280份，粉煤灰30‑50份，再生粗骨料1100‑1200份，改性再生细骨料850‑870份，水162‑166份，聚羧酸减水剂2.9‑3.3份，所述改性再生细骨料由表面接枝有乙烯基的再生细骨料与马来酸聚乙烯醇酯共聚后得到。本申请再生混凝土中，氯离子的渗透受阻，且再生混凝土的干燥收缩减小，因此再生混凝土的耐久性得到了改善。
High-durability recycled concrete and preparation method thereof
The invention relates to the technical field of concrete, and particularly discloses high-durability recycled concrete and a preparation method thereof. The high-durability recycled concrete is obtained by putting a concrete mixture into a mold for curing, and the concrete mixture is prepared from the following components in parts by weight: 260 to 280 parts of Portland cement, 30 to 50 parts of fly ash, 1100 to 1200 parts of recycled coarse aggregate, 850 to 870 parts of modified recycled fine aggregate, 162 to 166 parts of water and 2.9 to 3.3 parts of polycarboxylate superplasticizer, the modified recycled fine aggregate is obtained by copolymerizing recycled fine aggregate with vinyl grafted on the surface and maleic acid polyvinyl alcohol ester. In the recycled concrete, the permeation of chloride ions is blocked, and the drying shrinkage of the recycled concrete is reduced, so that the durability of the recycled concrete is improved.
本申请涉混凝土技术领域，具体公开了一种高耐久性再生混凝土及其制备方法。所述高耐久性再生混凝土由混凝土拌和物经过入模养护后得到，所述混凝土拌和物包括如下重量份的组分：硅酸盐水泥260‑280份，粉煤灰30‑50份，再生粗骨料1100‑1200份，改性再生细骨料850‑870份，水162‑166份，聚羧酸减水剂2.9‑3.3份，所述改性再生细骨料由表面接枝有乙烯基的再生细骨料与马来酸聚乙烯醇酯共聚后得到。本申请再生混凝土中，氯离子的渗透受阻，且再生混凝土的干燥收缩减小，因此再生混凝土的耐久性得到了改善。
High-durability recycled concrete and preparation method thereof
高耐久性再生混凝土及其制备方法
GUO QING (Autor:in) / MA WUPING (Autor:in) / GUO FEI (Autor:in) / PAN JIZENG (Autor:in)
15.08.2023
Patent
Elektronische Ressource
Chinesisch
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