{"id":50177,"date":"2023-12-01T08:00:30","date_gmt":"2023-11-30T23:00:30","guid":{"rendered":"https:\/\/norimen.net\/wordpress\/?p=50177"},"modified":"2026-05-16T14:22:43","modified_gmt":"2026-05-16T05:22:43","slug":"concrete-restoration-50-years","status":"publish","type":"post","link":"https:\/\/norimen.net\/en\/concrete-restoration-50years\/","title":{"rendered":"Instead of tearing down concrete structures built decades ago, let\u2019s restore them to full functionality and ensure they last another 50 years!"},"content":{"rendered":"

Hello, everyone.<\/p>\n

This is Enta.<\/p>\n

I learned something very clearly from the survey we\u2019ve been conducting over the past few days.<\/p>\n

There was a lot of efflorescence (white deposits) at that site. (Retaining wall)<\/p>\n

(Hereinafter referred to as \"Efro\")<\/p>\n

\"Efflorescence\"<\/p>\n

I was investigating that.<\/p>\n

There were other abnormalities as well.<\/p>\n

 <\/p>\n

And here is the result after removing the core<\/p>\n

\"Reitans<\/p>\n

Isn't this amazing?<\/p>\n

 <\/p>\n

I know some of you might be completely confused by this, but these are the cores from three different locations.<\/p>\n

All ties have been severed.<\/p>\n

 <\/p>\n

Possible causes include concrete construction joints or cold joints.<\/p>\n\n\n\n
Weld Seams and Cold Joints<\/p>\n

A cold joint is an unexpected seam that occurs when the lower and upper layers of concrete fail to bond during this \u201cconsecutive pouring\u201d process, whereas a \u201cconsecutive pour\u201d refers to a planned joint.<\/b>\u3002<\/p>\n

by Google Search<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

The lines on the Eflo are all over the place, so I'm thinking it's probably a cold joint.<\/p>\n

That said, the construction took place a little less than 50 years ago\u2014did the concept of a cold joint even exist back then?<\/p>\n

I wonder what the quality of structures has been like since the Tokyo Olympics.<\/p>\n

\"Gravity<\/p>\n

This is a gravity retaining wall built shortly before I was born.<\/p>\n

The concrete seems to have achieved sufficient strength, so there doesn't appear to be a problem, but,<\/p>\n

I have to figure out what to do with this mille-feuille-like concrete structure in just one week\u2014that\u2019s pretty tough, lol.<\/p>\n

Well, what should I do... lol<\/p>\n

 <\/p>\n

I feel like I've been doing nothing but designs like this lately.<\/p>\n

Well, it's fun, but it's hard and I'm always running out of time lol<\/p>\n

It\u2019s only fun while I\u2019m saying things like this, lol.<\/p>\n

 <\/p>\n

See you later.<\/p>","protected":false},"excerpt":{"rendered":"

Hello, everyone. This is Enta. I learned something important during the survey I\u2019ve been conducting over the past few days. The site in question had a lot of efflorescence (white deposits) on the retaining wall (hereinafter referred to as \u201cefflorescence\u201d). I was investigating that area because there were other abnormalities as well. \u2026<\/p>","protected":false},"author":2,"featured_media":7212,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[4529,1],"tags":[1378,3429,5974,5975,5976,5977],"class_list":["post-50177","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-for-everyone","category-others","tag-1378","tag-3429","tag-5974","tag-5975","tag-5976","tag-5977"],"acf":[],"yoast_head":"\n\u6570\u5341\u5e74\u524d\u306e\u30b3\u30f3\u30af\u30ea\u30fc\u30c8\u69cb\u9020\u7269\u3092\u64a4\u53bb\u3059\u308b\u3088\u308a\u3082\u6a5f\u80fd\u56de\u5fa9\u3055\u305b\u3001\u3042\u306850\u5e74\u4fdd\u305f\u305b\u308b\uff01 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