Standards for Cement Milk Compressive Strength Tests | Why Three Samples in the Morning and Three in the Afternoon, and Flatness According to JIS A 1108
Hello, everyone. This is Enta. I’m often asked about the rationale behind the “three samples in the morning, three in the afternoon” schedule for compressive strength tests on cement slurry used in rock bolt and ground anchor construction. Younger site supervisors sometimes ask, “Wouldn’t it be safer to take 12 samples a day?”…
How to Prepare Test Specimens for Sprayed Concrete and Mortar
皆さんこんにちは。 エンタです。 吹付工における圧縮強度試験の供試体ってどの様にして作っていますか？ 現場を知らない方だと、？？？ってなると思います。 今回は供試体の作り方を書いてみようと思います。 基本的な吹付コンクリートに…
Post-processing of test specimens after preparation for the compressive strength test
Hello, everyone. This is Enta. Are you conducting compressive strength tests? Well, I’m sure you are, lol. I think most veterans already know this, but there are some preparations to make after coring. If you skip those steps, the strength may decrease or the test may fail to yield a valid result, so let’s go through the steps…
建設DXの無駄な使い方
皆さんこんにちは。 エンタです。 なんだか秋っぽくなってきましたね！ やっと！ 暑いですけど、8月に比べりゃマシですｗ この辺から良い季節になります！ バシバシ仕事しましょう！ 閑話休題 先日ツブシに行ったんです。 (ツブシとは圧縮強度試験…
Preliminary Results of Compressive Strength Tests on Mortar with Increased Mixing Temperature During Winter θ7
皆さんこんにちは。 エンタです。 先日お湯割りの記事を書きましたｗ 冬の吹付はお湯割り凍害対策で決まり！ これの供試体を作成し試験します。 お湯割りの供試体はこのまま放置されました。 吹付法枠工は1週と4週強度が必要なので、とりあえず材齢5…
If you're doing cement-based construction work, you should conduct strength tests whenever possible to ensure quality! (For the general public)
Hello, everyone. This is Enta. For public works contractors, conducting compressive strength tests on concrete is standard practice. Furthermore, in our case as public works contractors, when we have private JIS-certified factories perform these tests, government officials are generally present. Well, depending on the situation, this requirement may be waived if a site representative or quality control officer is present…
Compressive Strength Testing at Public Testing Facilities | Cost Reduction and Improved Reliability
Hello, everyone. This is Enta. You’re conducting compression strength tests, right? Where do you crush the samples? (I mean, are you conducting compression strength tests?) Surprisingly, there can be differences depending on the prefecture, and there are also differences in how individual supervisors approach things. …
Found a Great Product! Test Specimen Box | Curing Tools
Hello, everyone. This is Enta. Have you heard of this? It’s a product for keeping test specimens warm. It looks like it would be especially useful during the winter. And it’s great because it’s so convenient—you can just take it right to the testing facility. As a general rule, test specimens should not be subjected to impact…
モルタル吹付の供試体の養生｜品質管理
皆さんこんにちは。 エンタです。 先日セメントミルク供試体の養生の話を書きました。 セメントミルクの養生 よく考えてみればモルタル吹付の養生の事を書いていませんでしたので、私の経験と共に書いておきます。 モルタル吹付の供試体とかデカイですよ…