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Kept at the worksNotes checked before stamping

The day's log

The Kiln Log

Notes from the cement works, kept at the log

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blending

The blend

what stretches a bag: fly ash, slag, pozzolana and blended cements

Noted in this section

4

July 20261 note

  1. Fly ash being drawn from a silo into a closed tanker beneath a power station dust collection plant

    blendingThe blend

    The ash that came free

    Fly ash began as a disposal problem and became a concrete material. A note on collection, classes, transport economics and the beneficiation of stored ash.

    5 min

June 20262 notes

  1. Concrete test wall section built with high-volume fly ash mix, formwork ties still visible on the face

    blendingThe blend

    The high-volume fly ash experiment

    A note on high-volume fly ash concrete: the CANMET work of the 1980s, mixes with more ash than cement, and what the demonstration walls taught the trade.

    5 min

  2. Slag grinding station at a port with raw granulated slag stockpile, conveyor and ship in the background

    blendingThe blend

    The grinder by the water

    Slag grinding stations sit by ports and steelworks, not quarries. A note on granulation, latent hydraulicity, separate grinding and the map of where slag cement is made.

    5 min

March 20261 note

  1. Pallet of bagged blended cement in a hardware warehouse with printed type designations on the bags

    blendingThe blend

    Looking past ordinary Portland

    The bag on the shelf is rarely pure clinker anymore. A note on the blended cements, the standards that name them, the clinker factor and what replaced OPC.

    5 min