The mill certificate is read by the concrete trade that receives the delivery, not by the client or the architect. That trade checks the certificate and the delivery note against the order before accepting the load into the silo or bag store. If the documents disagree, the load is held before use, and the trade answers for the concrete placed on the design-build site. Byggedagbogen, a Danish reading journal about totalbyggeri and the building trades, keeps the site diary as its subject and follows the work the way a contractor's daily record does.

Who reads the mill certificate once the cement reaches a building site?

The delivery is received by the concrete trade, not by the client or the architect. The mill certificate and the delivery note are checked against the order before the silo or the bag store is accepted. The certificate identifies the cement type, the standard it meets and the production period; the delivery note ties that batch to a date and a quantity. A copy goes into the site file; the original stays with the trade that ordered the cement. If the certificate and the note disagree, the load is held before it is used, not after.

What does the concrete contractor answer for under a design-build contract?

Under a design-build contract, the client has one counterparty for the whole project. The concrete trade still answers for its own work inside that scope. The trade answers for the concrete it places: the mix, the transport time, the placing, the curing and the finished surface. It answers for the documentation of what it placed, including which cement went into which pour. It does not answer for the structural design unless the contract places that with the trade. The boundary between the two is written in the contract, and it is read before the first pour, not after a question is raised. In practice, this means the trade's responsibility begins when it accepts the mix design and the placing sequence, and ends when the specified curing period is complete and the surface is handed over. The trade does not answer for the choice of cement beyond the specification it was given, but it does answer for using the cement that was specified and for recording that use. If the contract makes the trade responsible for selecting the cement, then the trade answers for that selection as well. The contract is the only place where the line between design and execution is fixed. Reading it before the pour prevents later disagreement about who answers for what.

Why does a site diary record each pour?

A delivery note proves a quantity left a plant. A diary entry proves what was placed, where and on which day. The entry links the pour to the certificate batch, the weather, the temperature and the time of placing. If a slab is questioned years later, the diary is the record that shows the sequence of events. Entries are made the same day, in the same book, by the person on the site. A diary with gaps is weaker than a diary with plain, dated lines. The delivery note alone cannot show whether the cement was placed in the intended element or left in the yard. The diary entry connects the batch number on the certificate to the location of the pour, so that a later question about a specific slab can be traced back to the cement that went into it. Weather and temperature at the time of placing affect how the concrete sets, and the diary records those conditions. The time of placing matters when transport or waiting times are questioned. A diary kept in one book, with dated entries made on the day, gives a continuous account. Missing days create doubt about what happened on those days. Plain lines are enough; the value is in the sequence and the date.

What does the paperwork actually prove?

A mill certificate proves one thing: the cement met a declared standard at the mill, at the time of testing. It says nothing about what happened after the tanker left. The delivery note proves the batch and the date of dispatch, which lets a site tie a load to a specific production run. The site diary proves the placing conditions and the sequence of work, including when a pour started, what the weather was doing and who was on the job. None of these documents proves workmanship on its own. A certificate cannot show that a crew compacted or cured correctly, and a diary cannot show that the cement in the silo still matched its certificate. Read together, they form a traceable chain from production to placement, and that chain is what a technical assessment follows when something is disputed. One gap remains in every case. Storage after delivery is not covered by any of them, so the site keeps its own record of silo and bag conditions, including opening dates, moisture and any sign of set material. That record is the only link between the certificate and the concrete actually placed.

How is a Danish site diary kept?

On a total-contract site in Denmark, the daily record is a running log kept for the duration of the works, not a report written at the end. Entries are made as the day proceeds. The log notes deliveries, weather, manpower, visitors, instructions received and any deviation from the plan. It is first a working document for the site, used to coordinate trades and to check progress against the programme. If a dispute reaches a technical assessment, the same log becomes evidence, which is why entries are dated, signed and kept in sequence. The concrete trade's entries sit alongside the other trades' entries in the same sequence, so a pour can be read against the deliveries, the weather and the instructions of that day. Byggedagbogen follows this kind of log from the reader's side, entry by entry, across the contract, the trades, the halls and the paperwork.

What happens when a slab is questioned later?

When a slab is questioned years after the pour, the dispute is rarely about which cement brand was used. The question usually concerns strength, cracking, surface condition or the timing of the work. The first step is to find the date of the pour and identify the batch that went into it. From there, the mill certificate, the delivery note and the site diary entry are read together against that date. Each document carries a different part of the record: the certificate describes what the cement was at dispatch, the delivery note places it on site, and the diary entry fixes when it was placed. A technical assessment may follow if the parties disagree, and it works from the same documents rather than from memory. A dated log shortens the argument because it fixes what happened on a given day. Without it, the discussion drifts toward recollection and assumption, and the concrete contractor is left answering for events that no longer have a written trace.