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Upgrading Unpaved Roads: Road Base Stabilization Using Lime and Fly Ash.

PB82103524

Publication Date	1981
Personal Author	Howley, J.; Wohlers, C.
Page Count	66
Abstract	Over 70% of this country's road miles are unpaved. Increased usage, new industries, and demographic changes place new burdens on many of these rural roads. In the past decade, road construction and maintenance costs have soared. Local government officials and road superintendents are searching for cost-effective alternatives to upgrading these roads using asphalt which may cost $100,000/mile. (In lime-fly ash stabilization road aggregate is thoroughly mixed with lime, fly ash and water to form a new road base to a depth of five or more inches; this new road base is then compacted and covered with a minimum asphaltic surface layer such as a double chip seal.) This guidebook is intended for the roads superintendent in evaluating if road base stabilization using lime and fly ash (an in-expensive waste product of coal-burning power plants) is an economical alternative to asphalt in upgrading a particular road. Detailed guidelines are presented for estimating the cost of materials for an LFA project as well as a description of the necessary construction and maintenance procedures.
Keywords	Rural areas Roads Construction materials Fly ash Calcium oxides Aggregates Asphalts Cost effectiveness
Source Agency	Single Entry
NTIS Subject Category	50A - Highway Engineering 50C - Construction Equipment, Materials, & Supplies
Corporate Authors	Upper Plains States Innovation Group, Bismarck, ND.; National Science Foundation, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	198201

Upgrading Unpaved Roads: Road Base Stabilization Using Lime and Fly Ash.

Upgrading Unpaved Roads: Road Base Stabilization Using Lime and Fly Ash.
PB82103524

Publication Date	1981
Personal Author	Howley, J.; Wohlers, C.
Page Count	66
Abstract	Over 70% of this country's road miles are unpaved. Increased usage, new industries, and demographic changes place new burdens on many of these rural roads. In the past decade, road construction and maintenance costs have soared. Local government officials and road superintendents are searching for cost-effective alternatives to upgrading these roads using asphalt which may cost $100,000/mile. (In lime-fly ash stabilization road aggregate is thoroughly mixed with lime, fly ash and water to form a new road base to a depth of five or more inches; this new road base is then compacted and covered with a minimum asphaltic surface layer such as a double chip seal.) This guidebook is intended for the roads superintendent in evaluating if road base stabilization using lime and fly ash (an in-expensive waste product of coal-burning power plants) is an economical alternative to asphalt in upgrading a particular road. Detailed guidelines are presented for estimating the cost of materials for an LFA project as well as a description of the necessary construction and maintenance procedures.
Keywords	Rural areas Roads Construction materials Fly ash Calcium oxides Aggregates Asphalts Cost effectiveness
Source Agency	Single Entry
NTIS Subject Category	50A - Highway Engineering 50C - Construction Equipment, Materials, & Supplies
Corporate Authors	Upper Plains States Innovation Group, Bismarck, ND.; National Science Foundation, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	198201