ITEM 205 CHEMICALLY STABILIZED EMBANKMENT
205.01 Description. This work consists of constructing a chemically stabilized embankment by
mixing cement or lime into the embankment soil using the method for the specified chemical. The Contract Documents include an estimated quantity for the specified chemical.
205.02 Materials. Furnish materials conforming to:
Portland cement .................. 701.04, 701.15 Lime (quick lime) ........................ 712.04.B Furnish water conforming to 499.02. Furnish suitable natural soil, from on or off the project site, conforming to 703.16 and 203.03.
205.03 Submittals. Submit, for the Engineer ’s acceptance, a report that lists the type of
equipment to be used, speed of the intended equipment usage, rate of application of the chemical, and calculations that demonstrate how the required percentage of chemical will be applied. Submit the report to the Engineer for acceptance at least 2 workdays before the stabilization work begins. If the pay item for Mixture Design for Chemically Stabilized Soils is included in the Contract Documents, prepare and submit reports according to Supplement 1120.
205.04 Construction. Perform chemically stabilized embankment work when the air
temperature is 40 F or above and when the soil is not frozen. Do not perform this work during wet or unsuitable weather. Drain and maintain the work according to 203.04.A.
A.Spreading. If the pay item for Mixture Design for Chemically Stabilized Soils is not included in the Contract Documents, use the following spreading percentage rate for the specified chemical. The percentage is based on a dry density for soil of 115 pounds per cubic foot: TABLE 205.04-1 Chemical Spreading Rate Cement 5 % Lime 5 % Spread the chemical uniformly on the surface using a mechanical spreader at the approved rate and at a constant slow rate of speed. Use a distribution bar with a maximum height of 3 feet above the ground surface. Use a canvas shroud that surrounds the distribution bar and extends to the ground surface. Minimize dusting when spreading the chemical. Control dust according to 107.19. Do not spread chemical when wind conditions create blowing dust that exceeds the limits in 107.19. Do not spread the chemical on standing water.
B.Mixing. Immediately after spreading the chemical, mix the soil and chemical by using a power driven rotary type mixer. If necessary, add water to bring the mixed material to between 2 and 4 percent above optimum moisture content for cement, and to at least 3 percent above optimum moisture content for lime. Continue mixing until the chemical is thoroughly incorporated into the soil, all soil clods are reduced to a maximum size of 2 inches, and the mixture is a uniform color. For areas not under pavements or paved shoulders, the Contractor may use a spring tooth or disk harrow in place of the power-driven rotary type mixer by modifying the above procedure as follows:
1.Open the soil with a spring tooth or disc harrow before spreading.
2.Spread the chemical.
3.Use a minimum disc harrow coverage of ten passes in one direction and ten passes in the perpendicular direction to thoroughly incorporate the chemical into the soil. Continue mixing until all soil clods are reduced to a maximum size of 1 inch and the mixture is a uniform color.
C.Compacting. Construct and compact chemically stabilized embankment according to 203.07, except use 98 percent of the maximum dry density for acceptance. Determine the maximum dry density for acceptance using the Ohio Typical Moisture Density Curves, the moisture density curves from the Contractor ’s mixture design submittal, or the maximum dry density obtained by test section method.
205.05 Mixture Design for Chemically Stabilized Soils. When included in the plans, perform
a mixture design for chemically stabilized soils according to Supplement 1120.
205.06 Method of Measurement . The Department will measure chemically stabilized
embankment by the number of cubic yards used in the complete and accepted work, as determined by Item 203. The Department will measure cement and lime by the number of tons incorporated in the complete and accepted work.
205.07 Basis of Payment. The Department will pay lump sum for all work, labor, and equipment
described in 205.05. The Department will pay two -thirds of the lump sum amount bid when the sampling and testing is complete and the report is accepted by the Department. The Department will pay one-third of the lump sum amount bid when the chemically stabilized embankment i s completed and accepted by the Department, and the field verification test results are all submitted. The Department will not apply the quantity underrun adjustment factors in Table 104.02-2 to the bid unit prices for Cement and Lime. The Department will pay for accepted quantities at the contract prices as follows: Item Unit Description 205 Cubic Yard Cement Stabilized Embankment 205 Cubic Yard Lime Stabilized Embankment 205 Ton Cement 205 Ton Lime 205 Lump Sum Mixture Design for Chemically Stabilized Soils
Get an email when 205 changes
Ohio revises spec sections through supplementals and new editions. We check this one every week and email you the day it changes. Free, no account.
Source: Construction and Material Specifications, 2023 (rev. 7/17/2026) Edition. Pages 106–108 of 892. View official source ↗