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‘If you collapse easily’, the apartment will come out again… Concrete work soaked in heavy rain

On the 11th, when torrential rains occurred nationwide메이저사이트, it was confirmed one after another that concrete pouring work was being carried out at some apartment construction sites in Gyeonggi and Incheon. Concrete pouring in rainy weather is a dangerous work that has been pointed out as a cause of poor construction by weakening the strength of concrete.

According to videos and photos confirmed by the Hankyoreh through the National Construction Workers’ Union, concrete pouring work was carried out at some apartment construction sites in Gyeonggi and Incheon between 9 am and 5 pm that day. According to the video report, construction workers in raincoats are pouring concrete over the formwork even though it continues to rain. In another tip photo, you can see ready-mixed concrete trucks working at a construction site where the bottom is not visible due to rainwater. A heavy rain advisory was issued as of 6:00 p.m. on the same day in the Gyeonggi and Incheon areas where the concrete pouring work was in progress.

Concrete pouring work in rainy weather is considered one of the risky tasks that weaken the strength of concrete. The key to determining the strength of concrete is the ratio of water to cement, and when concrete is poured on a rainy day, the ratio of water increases and the strength of the concrete weakens. In January of last year, ‘insufficient concrete strength’ was pointed out as the cause of the collapse of the outer wall of the Hwajeong I-Park apartment building in Seo-gu, Gwangju.

However, there is no statutory provision prohibiting pouring in rainy weather. In the concrete standard specification of the Ministry of Land, Infrastructure and Transport for managing the quality of concrete, the only rule is that ‘if there is a risk that rainfall, snowfall, etc. may adversely affect the quality of concrete, necessary measures must be determined and reviewed and confirmed by the responsible engineer’. . The standard safety work guidelines for concrete construction stipulate that only in the case of formwork assembly, ‘work must be stopped in bad weather such as strong wind, heavy rain, and heavy snow.’ An official from the Ministry of Land, Infrastructure and Transport told the <Hankyoreh>, “Usually, when it rains a lot, we don’t do concrete (pour work) well.” The standard specification stipulates that the work can be done if it is determined that there is no problem after being reviewed by experts to prevent factors that can deteriorate the quality of concrete.”


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