Common mistakes by unskilled workmen.
Workmen , especially if unskilled, may make mistake because of ignorance. Insist on the following.
Do not allow, during volume batching , heaping of aggregates in the batch boxes.
Do not permit use of reclaimed cement, aggregate or spilled concrete.
Do not permit the practice of working up excess mortar to the surface and finishing it with neat cement.
Do not allow inexperienced mixer operators to add water to concrete mix carelessly.
Do not allow vibration for prolonged periods.
Do not allow workmen to drag the needle vibrator along concrete to move the concrete.
Workmen , especially if unskilled, may make mistake because of ignorance. Insist on the following.
Do not allow, during volume batching , heaping of aggregates in the batch boxes.
Do not permit use of reclaimed cement, aggregate or spilled concrete.
Do not permit the practice of working up excess mortar to the surface and finishing it with neat cement.
Do not allow inexperienced mixer operators to add water to concrete mix carelessly.
Do not allow vibration for prolonged periods.
Do not allow workmen to drag the needle vibrator along concrete to move the concrete.
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