Hello, everyone

This is Enta.

Just like the other day, I’m going to ramble a bit about some things that made me go, “Huh?” at a study group I attended.

As public works contractors, we use materials manufactured by suppliers specifically for public works projects in our construction work.

To put it simply, the structures we’ve built are generally expected to last about 50 years.

Well, since that’s the minimum service life for concrete structures, it will likely vary depending on the situation and circumstances.

 

And did you know?

The shelf life of the product known as "anti-rust oil" contained in the oil cap for head treatment!

I hear this rust-preventive oil lasts about 10 years!!

It's been about 10 years!!

 

That really happens, huh? lol

After that, does the rust-preventive effect gradually weaken, or does it disappear altogether?

And the fact that they're putting rust-preventive oil in the aluminum caps means that,

That means we'll need to replace it in 10 years or more, right?

Who on earth would do something like that???

That's the natural way to think about it.

 

I bet even the government doesn't know, right??

You mean the rust-preventive oil lasts about 10 years!?

I did it for the first time at this study session, too!!!

The design still incorporates rust-preventive oil.

Even though I know the rust-preventive oil will stop working in 10 years, lol

 

I really wish they'd stop including rust-preventative oil in the design already, so,

Design consultants should not kowtow to materials manufacturersDo not adopt this designI'd like to have one.

It really seems to be becoming a prime example of wasted public funds... (Am I exaggerating? lol)

 

Manufacturers who understand this are switching to systems (materials) that allow them to manage it.

I fully understand that proper oil maintenance is essential for the anchor heads used in ground anchor construction, but,

Do you need oil for the head cap on a rebar inserter?? lol

The rebar is galvanized, and the galvanized coating alone lasts for over 50 years.

 

In a previous survey, over 60% of respondents said it wasn't necessary. (See survey results on the TOP screen.)

Those days are behind us now, aren't they?

If I don't need something, I don't need it.

It's best to use a flat-top-style finish that doesn't require oil, isn't it?

If you're a rebar inserter who may never be responsible for maintenance throughout the structure's lifespan, then,

This means that materials with a short service life should not be used in public works projects.

 

See you later

Replacing Parts Alone Can Extend Service Life | Life Cycle Cost