Abstract: A portable chassis-mounted continuous flow, blending and mixing plant utilizing a Programmable Logic Controller and belt scales to continuously meter and adjust the flow of aggregate as well as maintain the proper ratio and flow of additives, both dry and liquid.

Abstract: A mobile pugmill accurately mixes an aggregate, an additive and a liquid supplied to a mixing chamber. The pugmill includes a first scale for weighing the aggregate being supplied to the mixing chamber and producing a signal proportional to aggregate weight as the aggregate is being continually conveyed to the mixing chamber. The pugmill also includes a second scale for weighing the additive being supplied to the mixing chamber and producing a signal proportional to additive weight as the additive is being continually conveyed to the mixing chamber. The pugmill further includes a programmable logic controller responsive to the signals proportional to aggregate and additive weights for selectively controlling flow rates into the mixing chamber of the aggregate, the additive and the liquid.