滨海环境下清水防腐蚀混凝土配制技术
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1.中交四航工程研究院有限公司,广东广州510230;2.中国烟台环保疏浚有限公司,山东烟台264000

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Preparation technology of anticorrosive fair-faced concrete in littoral environment
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1.Engineering Technology Research Co., Ltd. of CCCC Fourth Harbor Engineering Co., Ltd.,Guangzhou 510230, China;2. CCCC-TDC Yantai Environmental Protection Dredging Co., Ltd., Yantai 264000, China

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    摘要:

    通过改变原材料种类、胶凝材料总量、水胶比、矿物掺合料用量和比例以及模板体系等因素,探索混凝土抗压强度、抗氯离子渗透性以及外观质量的变化规律。水胶比为0.34~0.38,胶凝材料用量不小于420 kg/m3,以1颐2 比例掺入30%~60%的粉煤灰与矿粉,掺入20%以下的超细石灰石粉,同时运用消泡剂与引气剂对聚羧酸减水剂加以改进,严格控制原材料性能指标,并在钢模板中涂覆聚氨酯模板漆,可制备出强度等级大于C40,56 d 氯离子迁移系数小于3.0伊10-12 m2/s,外观质量满足JGJ 169—2009《清水混凝土应用技术规程》的清水防腐蚀混凝土。

    Abstract:

    The species of raw material, gel material content, water-binder ratio, amount and ratio of mineral admixture, and selection of formwork system are changed to explore the change law of the concretes compressive strength, resistance to chloride ion permeability, and appearance quality. With a water-cement ratio ranging from 0.34 to 0.38, cementitious material greater than or equal to 420 kg/m3, mix with 30% to 60% of fly ash and slag in the ratio of 1颐2, mix with 20% of the super-fine limestone powder, as well as the use of defoamer and air-entraining agents, we may improve the polycarboxylate superplasticizer. Under the strict control of the quality of raw materials, and painting polyurethane template paint, we can make anticorrosive fair-faced concrete with a strength of greater than C40, 56 d chloride ion diffusion coefficient of less than 3.0×10-12 m2/s, and the appearance meeting the JGJ 169—2009“Technical regulations for application of fair-faced concrete”.

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李士伟,安普斌 ,李超 ,等.滨海环境下清水防腐蚀混凝土配制技术[J].水运工程,2012(3):24-29.

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  • 在线发布日期: 2012-03-22
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