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Anti-freezing concrete capable of being recycled for multiple generations and preparation method thereof
The invention discloses anti-freezing concrete capable of being recycled for multiple generations and a preparation method. The concrete is prepared from the following raw materials in parts by weight: 405 to 418 parts of cement, 8 to 20 parts of nano silicon dioxide, 680 to 735 parts of river sand, 865 to 890 parts of recycled coarse aggregate, 168 to 194 parts of water, 2.2 parts of polycarboxylate superplasticizer and 0.05 to 0.1 part of alkylbenzene sulfonate air entraining agent. The nano silicon dioxide is used as a raw material and has high specific surface area and pozzolanic activity, the alkylbenzene sulfonate air entraining agent reduces aggregation of the nano silicon dioxide, uniform dispersion of the nano silicon dioxide in the concrete is promoted, air holes in the concrete are uniformly distributed, and therefore the mechanical property and the anti-freezing property of the concrete are improved; and the second-generation and third-generation recycled coarse aggregates obtained by crushing after freezing and thawing for 400 times can be reused as structural concrete in cold regions, so that the waste of materials and the environmental pollution are greatly reduced.
本发明公开了一种可多代循环再生利用的抗冻混凝土及制备方法，所述混凝土由以下原料按重量份组成：水泥405～418份，纳米二氧化硅8～20份，河砂680～735份，再生粗骨料865～890份，水168～194份，聚羧酸减水剂2.2份和烷基苯磺酸盐类引气剂0.05～0.1份。本发明以纳米二氧化硅为原料，其具有较高的比表面积和火山灰活性，烷基苯磺酸盐类引气剂减少了纳米二氧化硅的聚集，不仅促进其在混凝土中的均匀分散，还使混凝土中的气孔分布均匀，从而提高混凝土的力学性能和抗冻性能，且经400次冻融后破碎得到的第二代和第三代再生粗骨料可再用于寒冷地区的结构混凝土，大大减少了材料的浪费和环境污染。
Anti-freezing concrete capable of being recycled for multiple generations and preparation method thereof
The invention discloses anti-freezing concrete capable of being recycled for multiple generations and a preparation method. The concrete is prepared from the following raw materials in parts by weight: 405 to 418 parts of cement, 8 to 20 parts of nano silicon dioxide, 680 to 735 parts of river sand, 865 to 890 parts of recycled coarse aggregate, 168 to 194 parts of water, 2.2 parts of polycarboxylate superplasticizer and 0.05 to 0.1 part of alkylbenzene sulfonate air entraining agent. The nano silicon dioxide is used as a raw material and has high specific surface area and pozzolanic activity, the alkylbenzene sulfonate air entraining agent reduces aggregation of the nano silicon dioxide, uniform dispersion of the nano silicon dioxide in the concrete is promoted, air holes in the concrete are uniformly distributed, and therefore the mechanical property and the anti-freezing property of the concrete are improved; and the second-generation and third-generation recycled coarse aggregates obtained by crushing after freezing and thawing for 400 times can be reused as structural concrete in cold regions, so that the waste of materials and the environmental pollution are greatly reduced.
本发明公开了一种可多代循环再生利用的抗冻混凝土及制备方法，所述混凝土由以下原料按重量份组成：水泥405～418份，纳米二氧化硅8～20份，河砂680～735份，再生粗骨料865～890份，水168～194份，聚羧酸减水剂2.2份和烷基苯磺酸盐类引气剂0.05～0.1份。本发明以纳米二氧化硅为原料，其具有较高的比表面积和火山灰活性，烷基苯磺酸盐类引气剂减少了纳米二氧化硅的聚集，不仅促进其在混凝土中的均匀分散，还使混凝土中的气孔分布均匀，从而提高混凝土的力学性能和抗冻性能，且经400次冻融后破碎得到的第二代和第三代再生粗骨料可再用于寒冷地区的结构混凝土，大大减少了材料的浪费和环境污染。
Anti-freezing concrete capable of being recycled for multiple generations and preparation method thereof
一种可多代循环再生利用的抗冻混凝土及制备方法
ZHU PINGHUA (author) / WANG HUAYU (author) / YANG LEI (author) / LIU HUI (author) / CHEN CHUNHONG (author) / ZHU LEI (author)
2023-12-01
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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