Lithostek laboratory asphalt mixers combine controlled temperature, repeatable mixing action, and practical batch capacities to produce representative asphalt mixtures before Marshall, gyratory, wheel-tracking, slab, fatigue, and stiffness testing.
Frequently Asked Questions
What is a laboratory asphalt mixer used for?
A laboratory asphalt mixer prepares controlled batches of aggregate, binder, filler, and additives for mix design, quality control, and research. The mixed material is then compacted or formed for Marshall, gyratory, wheel-tracking, slab, fatigue, stiffness, and related asphalt tests.
How is a laboratory asphalt mixer different from an asphalt mixing plant?
A laboratory asphalt mixer produces smaller, controlled batches for specimen preparation and research. An asphalt mixing plant is production equipment for manufacturing paving material at industrial throughput; mixer trucks and theoretical maximum density meters serve different workflows again.
Why can aggregate breakage affect laboratory mixture results?
Unintended crushing can change the aggregate particle-size distribution from the intended job-mix formula. That gradation shift may alter packing, void structure, binder demand, compactability, and the representativeness of downstream laboratory specimens.
How should a laboratory choose mixer capacity and mixing architecture?
Choose capacity from the required specimen mass and batch frequency, then compare temperature control, mixing action, cleanability, aggregate size, binder viscosity, and the risk of material becoming trapped at close-clearance mixing interfaces.
Which downstream tests use laboratory-mixed asphalt specimens?
Common workflows include Marshall stability, gyratory compaction, wheel tracking, slab compaction, indirect tensile strength, moisture susceptibility, fatigue, stiffness, and dynamic modulus testing.
What does EN 12697-35 cover in the mixing workflow?
EN 12697-35 addresses laboratory mixing of bituminous mixtures. Laboratories should confirm the applicable edition, project specification, target batch size, temperature procedure, and required mixer configuration before purchasing equipment.
