Resources

White Papers

A Comparison of Liquid Antistrip Additives and Hydrated Lime Using AASHTO T-283

By Patrick Lavin, VP Construction Chemicals, ArrMaz

Abstract
Moisture damage or stripping is an asphalt pavement distress that is generally recognized as the loss of the bond between the asphalt binder and the aggregate. The purpose of this research is to determine if hydrated lime and high performance chemical additives perform similarly using AASHTO T-283 as the prediction model for the moisture sensitivity of a hot mix asphalt mixture || read paper

"When Nameplate Is Not Enough" - Expanding Phos Acid Capacity With Defoamers

Presented at Phosphates 2005 International Conference and Exhibition, Paris France
April 2005
By Dan Partin, VP International Business, ArrMaz

Abstract
Problematic issues related to surface foaming and entrained gases often adversely effect phosphoric acid production volume and efficiency. In newly constructed facilities, design specialists strive to build plants that can operate with minimal reagent usage. Raw materials feed streams occasionally vary from surveyor projections and in such cases, the phosphate rock can contain constituents that cause stable bubble formation, excess reactor fuming and entrained gases. Significant foam presence and/or gas entrainment decreases agitation and slurry circulation by lowering pumping efficiencies. These factors combine to reduce reaction efficiency, capacity and chemical control stability || read paper

Polymer Filtration Aid - "A Decade of Lab and Plant Observations

Presented at The Regional Florida AIChE Meeting
June 5 2004
By Louis Irwin, ArrMaz

Abstract
Many Phosphoric Acid plants use a Polymeric Filtration Aid for increased production and recovery. This paper presents laboratory rate data, generated over 10 years, versus various plant conditions || read paper

Effects of Amine-Based Anti-Strip Additives on the Performance Grade of Asphalt Binders

By Ray Gore, Technical Manager, ArrMaz

Abstract
Amine-based anti-strip additives are commonly added to asphalt to promote adhesion to aggregate. The most common typs of adhesion promoters are fatty amines, polyamines based on BHMT, and amidoamines. The objective of this research is to determin the change in performance grade when these adhesion promoters are added to binders from various sources || read paper