Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
C35 self-compacting concrete adopting machine-made sand and preparation method thereof
The invention discloses C35 self-compacting concrete adopting machine-made sand and a preparation method thereof. The concrete is obtained by mixing the following raw materials: 250-320 parts of cement, 40-80 parts of fly ash, 80 to 120 parts of mineral powder; 580 to 680 parts of machine-made sand with the fineness of 3.1 to 3.5; 160 to 250 parts of natural fine sand with the fineness of 0.5 to 0.8, 150 to 350 parts of 5 to 16mm continuously graded natural broken stone, 500 to 750 parts of 5 to 20mm continuously graded natural broken stone, 180 to 210 parts of water, and 10.0 to 12.0 parts ofa polycarboxylate water reducer. The machine-made sand can also be subjected to a modification treatment: adding a filler composition containing diatomite and talcum powder according to a weight ratio of 1: (0.02-0.1) into a polyvinyl alcohol water solution according to 100-150g/L to obtain a modifying solution A; adding a fiber composition containing basalt fibers and brucite fibers according toa weight ratio of 1: (0.01-0.08) into the polyvinyl alcohol water solution according to 50-100g/L to obtain a modifying solution B; soaking and stirring the machine-made sand in the modifying liquidA for 1-2 hours, soaking and stirring the machine-made sand in the modifying liquid B for 1-2 hours, and drying. The concrete still has good fluidity and strength on the premise that a large amount ofmachine-made sand is adopted.
本发明公开了一种采用机制砂的C35自密实混凝土及其制备方法。该混凝土由包括以下组分的原料混合获得：水泥250‑320份、粉煤灰40‑80份、矿粉80‑120份、细度为3.1‑3.5的机制砂580‑680份、细度为0.5‑0.8的天然细砂160‑250份、5‑16mm连续级配的天然碎石150‑350份、5‑20mm连续级配的天然碎石500‑750份、水180‑210份、聚羧酸减水剂10.0‑12.0份。上述机制砂还可经改性处理：按100‑150g/L向聚乙烯醇水溶液中添加包含重量比为1:（0.02‑0.1）的硅藻土和滑石粉的填料组合物，得改性液A；按50‑100g/L向聚乙烯醇水溶液中添加包含重量比为1:（0.01‑0.08）的玄武岩纤维和水镁石纤维的纤维组合物，得改性液B；机制砂原料于改性液A中浸泡搅拌1‑2h，于改性液B中浸泡搅拌1‑2h，烘干。该混凝土在大量采用机制砂的前提下仍具较佳的流动度和强度。
C35 self-compacting concrete adopting machine-made sand and preparation method thereof
The invention discloses C35 self-compacting concrete adopting machine-made sand and a preparation method thereof. The concrete is obtained by mixing the following raw materials: 250-320 parts of cement, 40-80 parts of fly ash, 80 to 120 parts of mineral powder; 580 to 680 parts of machine-made sand with the fineness of 3.1 to 3.5; 160 to 250 parts of natural fine sand with the fineness of 0.5 to 0.8, 150 to 350 parts of 5 to 16mm continuously graded natural broken stone, 500 to 750 parts of 5 to 20mm continuously graded natural broken stone, 180 to 210 parts of water, and 10.0 to 12.0 parts ofa polycarboxylate water reducer. The machine-made sand can also be subjected to a modification treatment: adding a filler composition containing diatomite and talcum powder according to a weight ratio of 1: (0.02-0.1) into a polyvinyl alcohol water solution according to 100-150g/L to obtain a modifying solution A; adding a fiber composition containing basalt fibers and brucite fibers according toa weight ratio of 1: (0.01-0.08) into the polyvinyl alcohol water solution according to 50-100g/L to obtain a modifying solution B; soaking and stirring the machine-made sand in the modifying liquidA for 1-2 hours, soaking and stirring the machine-made sand in the modifying liquid B for 1-2 hours, and drying. The concrete still has good fluidity and strength on the premise that a large amount ofmachine-made sand is adopted.
本发明公开了一种采用机制砂的C35自密实混凝土及其制备方法。该混凝土由包括以下组分的原料混合获得：水泥250‑320份、粉煤灰40‑80份、矿粉80‑120份、细度为3.1‑3.5的机制砂580‑680份、细度为0.5‑0.8的天然细砂160‑250份、5‑16mm连续级配的天然碎石150‑350份、5‑20mm连续级配的天然碎石500‑750份、水180‑210份、聚羧酸减水剂10.0‑12.0份。上述机制砂还可经改性处理：按100‑150g/L向聚乙烯醇水溶液中添加包含重量比为1:（0.02‑0.1）的硅藻土和滑石粉的填料组合物，得改性液A；按50‑100g/L向聚乙烯醇水溶液中添加包含重量比为1:（0.01‑0.08）的玄武岩纤维和水镁石纤维的纤维组合物，得改性液B；机制砂原料于改性液A中浸泡搅拌1‑2h，于改性液B中浸泡搅拌1‑2h，烘干。该混凝土在大量采用机制砂的前提下仍具较佳的流动度和强度。
C35 self-compacting concrete adopting machine-made sand and preparation method thereof
一种采用机制砂的C35自密实混凝土及其制备方法
LIU ZHENYI (Autor:in) / WU JIANPING (Autor:in)
15.05.2020
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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