干冷气候条件下湿养护龄期对混凝土碳化性能的影响

林鹏; 吴笑梅; 樊粤明; 黄强伟

doi:10.13204/j.gyjz200909021

干冷气候条件下湿养护龄期对混凝土碳化性能的影响

doi: 10.13204/j.gyjz200909021

1.
1. 华南理工大学材料学院,广州 510640;
2.
2. 广东塔牌集团股份有限公司技术中心,梅州 514100

详细信息

作者简介:
林鹏，男，1982年10月出生，硕士研究生。E-mail：lp513888dy@163.com

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- 文章访问数: 61
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- 被引次数: 0
出版历程
- 收稿日期: 2008-10-11
- 刊出日期: 2009-09-20

EFFECT OF WET-CURING PERIOD ON CARBONATION RESISTANCE OF CONCRETE UNDER DRY-COLD CLIMATE

1.
1. School of Material Science and Engineering,South China University of Technology,Guangzhou 510640,China;
2.
2. Technical Center of Guangdong Tapai Group Co. ,Ltd. ,Meizhou 514100,China

摘要

摘要: 采用加速碳化试验研究干冷气候下不同湿养护龄期对C25强度等级的一种纯水泥混凝土A及三种双掺粉煤灰和矿渣粉的混凝土B、C和D碳化性能的影响,建立碳化速率与不同湿养护龄期之间的关系式。研究结果表明:在干冷气候下施工的混凝土,为保证25 mm钢筋保护层达到50年碳化寿命,纯水泥混凝土A至少应湿养护11.2 d,掺合料混凝土B、C和D则分别至少应湿养护11.1,12.9,14.5 d。混凝土中掺合料掺量越高,确保碳化性能安全所需的湿养护龄期也越长。
- 湿养护龄期 /
- 抗碳化性能 /
- 干冷气候 /
- 商品混凝土
Abstract: The effect of different wet curing period on carbonation resistance of grade 25 concretes including purified cement concrete A and three double-adding concretes(FA+SL) B,C and D was investigated under dry-cold climate via accelerated carbonation test.Liner equation between carbonation coefficient and different wetcuring period was proposed.The results show that in order to guarantee concrete service life of 50 years,A should be wet-cured for 11.2 d at least,and B,C and D should be wet-cured for 11.1 d,12.9 d and 14.5 d respectively.The more mineral admixture concrete contains,the longer the wet-curing period of concrete is for ensuring adequate carbonation resistance
- wet-curing period /
- carbonation resistance /
- dry-cold climate /
- ready-mixed concrete

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