Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
High-strength anti-crack concrete and preparation method thereof
The invention relates to the technical field of concrete, and particularly discloses high-strength anti-crack concrete and a preparation method of the high-strength anti-crack concrete. The concrete comprises the following components in parts by weight: 100-120 parts of fly ash, 300-500 parts of river sand, 550-750 parts of gravel, 10-20 parts of polyvinyl alcohol fiber, 15-20 parts of a polycarboxylate superplasticizer, 5-7 parts of fatty alcohol ether ester sodium sulfate, 3-7 parts of a magnesium expanding agent and 100-120 parts of water. The highest compressive strength of the concrete obtained in 7 days and 28 days is 71.3 MPa and 79.2 MPa respectively, and the slump degree and the dry shrinkage rate are 76 mm and 0.024% respectively; after the crack resistance test, the concrete crack number, the maximum crack width and the minimum crack length are respectively 2, 0.20 mm and 330 mm, the crack resistance grade is grade 1, and the strength and the crack resistance of the concrete are improved.
本申请涉及混凝土技术领域，具体公开了一种高强抗裂混凝土及其制备方法，其由包括如下重量份的原料制备而成：矾土水泥250‑350份，粉煤灰100‑120份、河砂300‑500份、碎石550‑750份、聚乙烯醇纤维10‑20份、聚羧酸盐高效减水剂15‑20份、脂肪醇醚酯硫酸钠盐5‑7份、镁质膨胀剂3‑7份和水100‑120份。本申请得到的混凝土7d和28d的抗压强度最高分别为71.3MPa和79.2MPa，且坍落度和干缩率分别为76mm和0.024%；经过抗裂性能测试后的混凝土裂缝数量、最大裂缝宽度和裂缝长度最低分别为2条、0.20mm和330mm，抗裂等级为1级，提高了混凝土的强度和抗裂性。
High-strength anti-crack concrete and preparation method thereof
The invention relates to the technical field of concrete, and particularly discloses high-strength anti-crack concrete and a preparation method of the high-strength anti-crack concrete. The concrete comprises the following components in parts by weight: 100-120 parts of fly ash, 300-500 parts of river sand, 550-750 parts of gravel, 10-20 parts of polyvinyl alcohol fiber, 15-20 parts of a polycarboxylate superplasticizer, 5-7 parts of fatty alcohol ether ester sodium sulfate, 3-7 parts of a magnesium expanding agent and 100-120 parts of water. The highest compressive strength of the concrete obtained in 7 days and 28 days is 71.3 MPa and 79.2 MPa respectively, and the slump degree and the dry shrinkage rate are 76 mm and 0.024% respectively; after the crack resistance test, the concrete crack number, the maximum crack width and the minimum crack length are respectively 2, 0.20 mm and 330 mm, the crack resistance grade is grade 1, and the strength and the crack resistance of the concrete are improved.
本申请涉及混凝土技术领域，具体公开了一种高强抗裂混凝土及其制备方法，其由包括如下重量份的原料制备而成：矾土水泥250‑350份，粉煤灰100‑120份、河砂300‑500份、碎石550‑750份、聚乙烯醇纤维10‑20份、聚羧酸盐高效减水剂15‑20份、脂肪醇醚酯硫酸钠盐5‑7份、镁质膨胀剂3‑7份和水100‑120份。本申请得到的混凝土7d和28d的抗压强度最高分别为71.3MPa和79.2MPa，且坍落度和干缩率分别为76mm和0.024%；经过抗裂性能测试后的混凝土裂缝数量、最大裂缝宽度和裂缝长度最低分别为2条、0.20mm和330mm，抗裂等级为1级，提高了混凝土的强度和抗裂性。
High-strength anti-crack concrete and preparation method thereof
一种高强抗裂混凝土及其制备方法
ZHANG TING (Autor:in) / GU YANAN (Autor:in) / HAO AIMING (Autor:in)
22.07.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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