505 E Central Ave #B - DEF 1 - Plan

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CITY OF SANTA ANA SPECIFICATIONS PROJECT NO.: XX-XXXX PROJECT TITLE 40 Mixing In Place This work consists of mixing in place the pulverized asphalt concrete, underlying base material, and subgrade soil with Portland Cement and water; then spreading, compacting, trimming, and curing the mixture to the lines, grade, and elevation as established by the Project Plans and Special Provisions. The cement treated mixture shall be constructed utilizing a machine or a combination of machines that will produce results meeting all the requirements herein. The mixing machine(s) shall be equipped with controlled water distributing equipment and water shall be applied under pressure. Leakage of water shall not be permitted. Care shall be exercised to avoid the addition of any excess water. Such equipment shall be approved by the Engineer prior to use. The treated mixture shall be uniform throughout and at least one pass of the mixing equipment shall be made before mixing water is added to the material. The engineer shall be the sole judge as to the number of passes required by the mixing equipment prior to the addition of the mixing water. The percentage of moisture to be added to the pulverized material during the mixing operation shall be the amount necessary to assure a uniform and intimate mixture of the materials. It shall not exceed by more than one percent the optimum moisture content as determined by California Test 312. Subsequent to the addition of water, sufficient passes shall be made by the mixing equipment to produce a uniformly treated material. Uniformity will be determined initially by sampling and testing at variable depths and locations within the treated material. The number of required passes may be adjusted from time to time by the Engineer based upon subsequent sampling and testing of the completed mixture. The engineer shall be the sole judge as to the number of passes required by the mixing equipment following the addition of the mixing water. Where mixing equipment requires windrow operations, the material to be treated shall be shaped and sized prior to the addition of cement. The windrow shall be limited to such size that all material can be passed through the mixing machine at each operation. The tops of windrowed material shall be flattened or slightly trenched to receive the cement. Following the final mixing operation, the treated mixture shall be spread to the required lines, grade, and elevation as shown on the plans. Compacting and Finishing The length of treated sections shall be regulated by the Contractor such that final compaction of the mixture to the specified density shall be completed within 2-1/2 hours after the initial application of water during the mixing operation. 505 E Central Ave #B11/6/2024