Daur ulang dingin perkerasan aspal - MIXING PLANT
Nov 6, 2020
Di Swedia, total sekitar 1 juta ton bahan Perkerasan lama didaur ulang setiap tahun.
Berbagai teknik digunakan (dingin, semi-panas dan panas) di mana daur ulang pabrik dingin telah menjadi metode yang paling umum untuk trotoar fleksibel di jalan dengan volume lalu lintas rendah (ADTtotal <1500 vehicles/day). Cold recycling is an economical technique since the material does not need to be heated. The asphalt plants can easily be moved from place to place and are therefore suitable for small-scale production and for road construction in sparsely populated areas far from stationary plants. In cold recycling, up to 100% of the asphalt can be recovered, but for a good result it is important to crush and screen the old asphalt first. About 2.0–4.0% new bitumen emulsion is added, usually together with water and sometimes 10–20% virgin mineral aggregates. Various procedures have been developed to make the mix as homogeneous as possible and to ensure sufficiently good coverage with the emulsion. It is important that the quantities of new binder, water and mineral aggregate be determined through preliminary tests in the laboratory. A new test procedure for this type of mix has therefore been developed and is included in the new directives for cold recycling produced by the National Swedish Road Administration. The procedure comprises tests and specifications Meliputi bidang-bidang berikut:
â¢Pengambilan sampel dan evaluasi bahan aspal lama
â¢Komposisi butiran (perkerasan aspal reklamasi, RAP)
â¢Panduan untuk memilih pengikat baru dan mencampur air dan agregat mineral
â¢Persiapan dan pengkondisian spesimen uji
â¢Desain campuran dan jaminan kualitas dengan menguji sifat mekanik dan daya tahan campuran daur ulang.