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The ambiant temperature has an effect on concrete pumping operations.
Since concrete sets faster in hot weather, a slow or intermittent pumping rate is necessary if delays in placement are anticipated. Also, wet burlap can be wrapped around pipelines to cool the concrete by evaporation.
During cold weather, concrete is in danger of freezing in exposed lines. Exposed lines should be run through enclosures or wrapped in insulation to prevent freezing.
Acknowledgement: Pochins plc