615GROUTED RUBBLE SLOPE DRAIN

494

GROUTED RUBBLE SLOPE DRAIN

615.01Description

This Section shall cover the work of constructing gutter slope drain of grouted rubble masonry in accordance with the plans and these specifications and to the established lines, grades, and cross section shown on the plans and designated.

615.02Materials

The materials shall conform to the requirements of Division 800, Materials. Specific reference is made to Subarticle 812.0l(b), Type II, Masonry Stone.

Grout shall meet the requirements of Section 611, Mortar for Masonry, except that it shall be of wetter consistency to flow as indicated in Subarticle 615.03(c).

Material shall be taken from sources shown on the plans or other approved sources of equal quality.

615.03Construction Requirements

The foundation shall be formed at a depth of not less than 8 inches {200 mm} below and parallel to the finished surface of the slope drain. All soft or other unsuitable material shall be removed, and the foundation shall be compacted and finished to a smooth, firm surface.

The approved foundation material shall be prepared to form a bed as provided by the plans. The slope drain stone shall be bedded in the foundation perpendicular to the finished surface, flat face up, with the longest dimension parallel to the slope drain. The stone shall be fitted and laid in close contact and shall break joints satisfactorily. Each stone shall be tamped into place until the stones are firm and the surface conforms to the finished grade and cross section.

While the slope drain stones are being tamped, the spaces between stones shall be filled and rammed with backfill material selected from unclassified excavation, to within 3 inches {75 mm} of the top and any irregularities in the slope drain corrected. The cement grout shall be poured and broomed into the spaces between and over the stones. This operation shall be continued until the grout remains flush with the tops of the stones. The slope drain shall be protected by wet burlap until the grout hardens, then kept moist for at least three days after grouting. No grout shall be poured in freezing weather.

615.04Method of Measurement

Accepted Grouted Rubble Masonry Slope Drain will be measured in square yards {square meters} complete in place, along the finished surface both longitudinally and transversely, and computed to the nearest 0.1 square yard {0.1 m²}.

615.05Basis of Payment

The accepted Grouted Rubble Slope Drain will be paid for at the contract unit price per square yard {square meter}, complete in place, which shall be payment in full for excavating and preparing the foundation bed, placing and grouting the stone and for furnishing all materials, tools, labor, and incidentals necessary to complete the work.

615-A Grouted Rubble Slope Drain - per square yard {square meter} SOIL CEMENT FLUMES 495

SOIL CEMENT FLUMES

616.01Description

This Section shall cover the work of constructing soil cement flumes at locations designated in accordance with details shown on the plans.

616.02Materials

All materials shall conform to the requirements of Division 800, Materials. Specific reference is made to the following:  Cement, Section 815.  Water, Subarticle 807.01(b).  Local Sand, Sand-Gravel, and Stone Screening for Miscellaneous Construction, Use Section 826.  Preformed Joint Filler, Article 832.01. Test specimens will not be required for soil cement flume.

616.03Construction Requirements

Subgrade shall be finished and compacted to the section as shown on the plans or as designated. Side forms and transverse forms of the size and shape necessary to secure the desired section shall be placed prior to the placing of the mix and at such intervals which will ensure a true finished grade and section by screeding with a straightedge.

The mix shall be one part Portland cement and six parts, by loose moist volume, local sand or sand-gravel and shall be mixed in an approved concrete mixer or by approved hand methods to a consistency dry enough to stand on the slopes without subsequently settling and sloughing, and tamped, rough graded, and finished by means of a hand float. After screeding, the surface shall be finished by hand float methods.

As soon as the soil cement has hardened sufficiently to prevent marring of the surface, and not later than the morning following its placement, it shall be cured for a period of 72 hours using one of the methods provided in Article 450.03.

Transverse expansion joints shall be constructed at maximum intervals of 40 feet {12 m}. They shall be filled with either preformed joint filler or acceptable yard lumber board of 1 inch {25 mm} (nominal size) pine, S4S. The finished surface shall be scored transversely with a grooving tool to a depth of at least 1/2 inch {13 mm} so as to form a weakened plane joint at intervals of 6 feet {2 m}.

Toe walls shall be constructed across the ends of each flume as follows: On upper end a toe wall of 6 inches {150 mm} in thickness and 12 inches {300 mm} in minimum depth below subgrade of the flume; on the lower end a toe wall 6 inches {150 mm} in thickness and 12 inches {600 mm} in minimum depth below subgrade.

A strip of solid sod shall be placed along each edge of the flume.

616.04Method of Measurement

Accepted soil cement flume will be measured in square yards {square meters}, complete in place, along the finished top surface both longitudinally and transversely and computed to the nearest 0.1 square yard {0.1 m²}.

616.05Basis of Payment

Accepted Soil Cement Flume, measured as provided above, will be paid for at the contract unit price per square yard {square meter}, complete in place, which shall be payment in full for excavating and preparing the subgrade and foundation bed, furnishing and erecting forms, furnishing all materials, mixing and placing the mix, curing, backfilling, and for all other materials, tools, labor, and incidentals