Asphalt and concrete: wet aggregates cost fuel and strength

Wet aggregate in the dryer drum swings fuel use and mix temperature

What happens. After rain, or when the loader moves to another part of the stockpile, the aggregate entering the dryer drum is wetter or drier. The burner follows a temperature setpoint and reacts only once the mix temperature at the outlet has moved. The operator corrects by hand.

What it costs. Fuel spent to evaporate water that could have been planned for, and fuel wasted overheating dry material. Mix that leaves too hot ages the binder; mix that leaves too cold is hard to lay and compact, and loads may be rejected on site.

Why the usual fix fails. A higher temperature setpoint gives a safety margin but costs fuel on every tonne. Moisture probes on the feed belt are hard to keep calibrated in the dust and see only one spot.

How a fixed-price remote diagnosis checks it. From your plant records (burner output, exhaust and mix temperatures, feed rates, weather) I estimate the moisture entering the drum. The fixed-price remote diagnosis tells you whether burner control on a computed moisture value could hold the mix temperature tighter with less fuel.

Aggregate moisture changes the real water content of every concrete batch

What happens. Sand and gravel in the bins carry water, and how much changes with weather, stockpile and time of day. The batching control adds water by recipe, perhaps corrected by a probe in the sand bin. The mixer operator judges consistency from the mixer power or by eye and adds water when it looks stiff.

What it costs. Extra water raises the water-cement ratio and lowers strength; to stay on the safe side, plants add cement. Batches outside the consistency class mean complaints and returned loads.

Why the usual fix fails. Moisture probes drift and only see the material right next to them. Adding more cement as a margin works, but it is the most expensive and most CO₂-intensive part of the mix.

How a fixed-price remote diagnosis checks it. From your batch records (weights, water added, probe readings, mixer power, test results) I check how well the real moisture of each batch can be estimated. The fixed-price remote diagnosis answers whether a computed moisture value could correct the water automatically and whether the cement margin could then be reviewed.

Recycled asphalt changes the mix from load to load

What happens. More recycled asphalt goes into new mixes, but the reclaimed material varies: binder content, grading, moisture and how aged the old binder is. A fixed recipe treats every load the same. The lab finds deviations after the material has left the plant.

What it costs. Mixes that miss the specified binder content or grading, more virgin binder added as a safety margin, and a cap on the recycled share that is lower than the material would allow.

Why the usual fix fails. More frequent lab tests cost time and still come after production. Keeping the recycled share low avoids the risk but gives away the material savings that make recycling worth it.

How a fixed-price remote diagnosis checks it. I look at your recipes, feed rates, temperatures and lab results for mixes with recycled material, and check how much of the variation can be explained and anticipated from the plant data. The fixed-price remote diagnosis shows whether mix control that adapts to the recycled material could hold the specification at a higher recycled share.