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Common tests for on-site evaluation of the efficacy of Anti-stripping Agents are :
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Serious failures can occur very shortly after laying surface treatments on roads carrying medium or heavy traffic if wet weather occurs within 24 hours after completion of work. Fast, tense traffic may flying aggregates off the roads exposing a layer of binder that may be slick. This problem has been solved by use of surface active chemicals - cationic material consisting of long-chain hydrocarbon soluble in tar and bitumen and has positively charged ions. (Recent Research on some problems in construction and maintenance of roads, By: Lee A.R., Roads and road construction Vol:36 N0.424).
It is recommended that an adhesion agent be added to binder (unless previously added by binder manufacturer) if unsettled weather is imminent and uncoated chippings are being used. (Road Note 39, Second Edition, Recommendations for road surface dressing, Transport and road research laboratory, Department of Transport, London)
Even if the construction is done during dry weather, there are possibilities of stripping taking place subsequently owing to rainfall. Some aggregates resist the action of water better than others. In some cases by adding some surface active agent, this resistance is increased. (Adhesion between Bitumenous Binders and Road Stones, By C.G. Swaminathan & K.P. Naire, Road Research paper no.14, Central Road Research Institute, New Delhi and IRC Journal Vol.XXII.2)
The Delhi quartzite aggregates used in bituminous macadam construction which show practically no stripping in laboratory tests undergo stripping in the field. Incorporation of anti-stripping agent in all open graded bituminous mixes prepared with Delhi quartzite aggregates is warranted. (Highway Research Record No.11, Road Researches in India).
The performance of test-section laid with bitumen with antistripping agent was better than that of those constructed with bitumen without anti-stripping agent. (Highway Research Record No.11, Road Researches in India)
Adhesion improver prevents moisture damage and slows ageing process in bituminous mixes. (The Shell Bitumen Handbook Fifth Edition, Evaluation of Asphalt Mixtures using the Texas freeze-thaw pedestal test By: Kennedy TW, FL Roberts and KW Lee)
Use of anti-stripping agents increases cost of construction by a small margin but would prove beneficial in long run due to increased durability of bituminous surfacing and would reduce cost of maintenance. (Highway Research Record No.10, Road Researches in India)
Anti-stripping agents improves bitumen coating property of the aggregates. (Highway Research Record No.10, Page 25,Road Researches in India)
As a precautionary measure Anti-Stripping Agent should be added to the bitumen at the time of construction. (Code of practice for Maintenance of Bituminous surfaces of Highways, Page 24, IRC-82:1982)
This product has also been found to be of great help in surface treating the fresh WBM roads for immediate opening of traffic. (Fundaments of adhesion and role of adhesion agents in bituminous road construction, Indian Highways, IRC, NewDelhi)
Many states require Anti-stripping agents as a safety factor in open mixes and as a requirement for dense mixes made with aggregates which show stripping tendencies. Since preventing raveling would be advantageous to both the state and the traveling public, a good case could be made for the state to pay for Anti-Stripping agents used in late season work. The 15-20% per tone of mix incurred by using Anti-stripping agents may be good insurance in late season work. (A study of Road Aggregates for use in Black Top Surfacings, By Sh. K.P. Nair & B.S. Gogte, Paper No.51, Central Road Research Institute, NewDelhi)