The California Department of Transportation (Caltrans) has been using scrap tire rubber in asphalt pavements since the 1970s in chip seals and the 1980s in rubberized hot mix asphalt(RHMA). Both the wet (field blend) and dry processes were used in early trials. Caltrans has also used rubber modified binders containing both crumb rubber modifier and polymer modifier that could be manuf... https://megkiqjo6gdjo3.theisblog.com/35130346/diare-disebabkan-infeksi-escherichia-coli-pada-anjing