Hello, everyone.
This is Enta.
As I mentioned before on Ameblo, if it doesn't show up in search results, then...
You don't see this very often, do you? So, this is a repost with a few minor additions.
What is 1.24 m³ of sand?I get asked that.
Right now, is it just listed as a "standard mix" of 1:4 for spray mortar?
In the past, it was mentioned quite often.
Sprayed Mortar (1:4) Cement: 420 kg Sand: 1,680 kg (1.24 m³)
Regarding 1.24,
Simply put, if you cram 1,680 kg in there as tightly as possible,
That comes out to 1,355 kg (which varies slightly depending on the specific gravity), which is 1.24 m³.
Basically, when you load sand onto a dump truck using a loader (such as a wheel loader),
This includes air and other voids, and its weight is 1,680 kg.
Since this is now the market price, it’s a figure that doesn’t come up very often, but,
In the past, these were the numbers used for cost estimation and quantity calculations.
I think the design figure is calculated by multiplying 1.24 m³ per 1 m³ by the loss rate.
Water-to-Cement Ratio (W/C) Double B.C.
The standard range is 45–55%.
Since the summer brings extreme dryness and heat, we set the humidity to 55% to improve workability during construction.
In winter, it’s best to adjust the setting to around 49% to prevent freezing.
By the way, it's best to avoid using antifreeze.
The reason is that it doesn't work. (It's a waste of money.)
(I won’t go into detail here, but there are experimental results showing that this method is ineffective at official testing centers.)
Before long, other manufacturers will start experimenting with this as a hobby, lol.
Recently, we’ve switched to market-based pricing, which has reduced the number of administrative tasks somewhat.
For example, the cash journal.
In the past, I used to struggle with the discrepancy between inventory and actual usage, but,
It isn't considered that important these days.
What’s more, since sprayed concrete is a common choice even on small lots, it’s easy to manage.
In the past, there were quite a few inspectors who would carefully examine the material receipt and issuance logs.
It's what people call "nitpicking," lol.
See you later.
