Effective with the December 2018 Letting 335 2019 Standard Spec ifications Section 606 Riprap
606.1 Description
1.This section describes furnishing and placing riprap.
606.2 Materials
606.2.1 Riprap Stone
1.Furnish durable field or quarry stone that is sound, hard, den se, resistant to the acti on of air and water, and free of seams, cracks, or othe r structural defects. Use sto ne pieces with a length and width no more than twice the thickness. D o not place material without th e engineer's approval of the stone quality, size, and shape.
2.The department will determine the average dimension of stone p ieces by averaging measurements of thickness, width, and length. F urnish stones conforming to the size requirements for the riprap grade the plans show. Size requirement s are expressed as the percent of the gross in-place riprap volume occupied by stones within aver age dimension size ranges for eac h riprap grade as follows: AVERAGE DIMENSION RANGES FOR EACH RIPRAP GRADE FRACTION OF GROSS LIGHT MEDIUM HEAVY EXTRA-HEAVY IN-PLACE RIPRAP RIPRAP RIPRAP RIPRAP RIPRAP VOLUME OCCUPIED inches inches inches inches BY STONES >16 >20 >25 >30 0% 11 - 13 14 - 16 18 - 20 22 - 25 10% - 14% 9 - 11 11 - 14 14 - 18 18 - 22 15% - 21% 4 - 9 5 - 11 6.5 - 14 8 - 18 20% - 28% <4 <5 <6.5 <8 5% - 7% <1 <1 <1 <1 2% or less
3.The contractor may sub stitute waste concrete slabs for stone. Furnish sound concrete, free of protruding reinforcement, and co nforming to the size requiremen ts specified for stone.
606.2.2 Riprap Grout
1.Furnish an air-entrained morta r or concrete to fill the voids between riprap stones in grouted riprap. Conform to the physical requirem ents for component materials as specified in 501.2 except furnish fine aggregate or a combination o f fine and coarse aggregate wi th a gradation that results in a grout with a consistency that allows c omplete filling of the riprap v oids.
2.Certify that the grout conforms to the following mixture requi rements: - Contains 470 pounds or more of portland cement per cubic yard of grout. The contractor may substitute class C fly ash for up to 30 percent of the required portland c ement. - Contains only enough water to a chieve a 3-inch slump. Any additional workability required to completely fill the riprap voids must be achieved with admixture without increa sing the w/cm ratio. - Contains 9 percent or more air for mixes with a nominal top s ize aggregate less than 3/8 inch or 7 percent or more air for a mix with 3/8 inch or larger aggregate.
606.3 Construction
606.3.1 General
1.Prepare the bed for the riprap by excavating, shaping the slop es, and constructing the toe for riprap installation. After placing the riprap, restore the surface of adjacent work and dispose of surplus material.
606.3.2 Placing Light Riprap
1.If laying stone above the waterl ine, place it by hand. Lay it with close, broken joints and firmly bed it in the slope and agains t the adjoining stones . Lay the stones perp endicular to the slope with ends in contact. Compact the riprap thoroughly as construction progress es. Make the finished surface even and tight. Place larger stone in l ower courses. Chink spaces be tween stones by firmly ramming spalls into place. If placing riprap o ver geotextile, use type R and c onform to 645.3.1.6 .
2.Unless specified otherwise, make riprap at least one foot thic k, measured perpendicular to the slope.
3.Do not place riprap against, or in contact with, concrete surf ace before the end of the concrete’s curing and protection period. 606.3.3 Placing Medium, Heavy, and Extra-Heavy Riprap
1.The contractor may place medi um, heavy, and extra-heavy riprap by any mechanical means that produce a completed job within reasonable tolerances of the typ ical section the plans show. Limit Effective with the December 2018 Letting 336 2019 Standard Spec ifications handwork to the quantity necessary to fill large voids or to co rrect segregated areas. If placing riprap over geotextile, use type HR and conform to 645.3.1.7 .
2.Unless specified otherwise, mak e medium riprap at least 18 inc hes thick, heavy riprap at least 24 inches thick, and extra-heavy ri prap at least 30 inches thick.
606.3.4 Placing Grouted Riprap
1.If the plans specify using grout ed riprap, lay the stone as sp ecified above under 606.3.2 or 606.3.3 . Fill the spaces between the stones wi th cement mortar. Use sufficien t mortar or concrete to completely fill voids, except leave the face s urface of the stone exposed.
2.Place grout from the bottom to the top and then sweep the surf ace with a stiff broom. After completing the grouting, cure the su rface as specified in 415.3.12 except substitute type 1-D curing compound as specified for structures in 502.2.6 . During cold weather , protect the concrete as specified in 415.3.13 for concrete pavement.
606.4 Measurement
1.The department will measure the bid items under this section b y the cubic yard acceptably completed, measured as the volume within t he limiting dimensions the contr act designates or the engineer establishes in the field. 606.5 Payment
1.The department will pay for measured quantities at the contrac t unit price under the following bid items: ITEM NUMBER DESCRIPTION UNIT 606.0100 Riprap Light CY 606.0200 Riprap Medium CY 606.0300 Riprap Heavy CY 606.0400 Riprap Extra-Heavy CY 606.0500 Grouted Riprap Light CY 606.0600 Grouted Riprap Medium CY 606.0700 Grouted Riprap Heavy CY 606.0800 Grouted Riprap Extra-Heavy CY
2.Payment for the bid items under this section is full compensat ion for preparing the bed, providing and placing riprap, restoring adjacen t work, and disposing of surpl us material. The department will pay for excavation in excess of the approx imate volume of earth occupie d by the riprap under the Excavation Common bid item as specified under 205.5 .
3.Payment for the Grouted Riprap bi d items also includes placing and curing mortar. Effective with the December 2018 Letting 337 2019 Standard Spec ifications Section 608 Storm Sewer
608.1 Description
1.This section describes providing new storm sewer and relaying existing storm sewer.
608.2 Materials
608.2.1 Pipe
1.Furnish pipe consistent with the diameter the bid item indicat es. Furnish materials for the various classes of pipe as follows: TABLE 608-1 ALLOWABLE MATERIALS FOR STORM SEWER CLASSES CLASS ALLOWABLE MATERIALS II Class II reinforced concrete III Class III reinforced concrete III-A Class II and Class III reinforced c oncrete, corrugated polyethy lene, corrugated polypropylene III-B Class III reinforced concrete , corrugated polypropylene IV Class IV reinforced concrete
V.Class V reinforced concrete
2.Furnish materials conforming to the following: Circular reinforced concrete pipe ............................. ............................................................... ..... AASHTO M170 Horizontal elliptical rei nforced conc rete pipe ................ ............................................................... AASHTO M207 Corrugated polyeth ylene pipe .................................. ............................................................... .. AASHTO M294 S Corrugated polypro pylene pipe ................................. ............................................................... . AASHTO M330 S Composite pipe, couplings, fitti ngs and joint materials ....... ............................................................ ASTM D2680 Joints using ru bber gaske ts .............................................................................................................. ASTM C443 Joints using preformed fl exible joint sealants ................ ................................................................... ASTM C990 External rubber gaskets, mastic, and protective film ......................................................................... ASTM C877 Mortar ........................................................ ............................................................................................... 519.2.3
3.Manufacture precast reinforced co ncrete pipe for storm sewer i n a plant listed under precast concrete fabricators on the department's APL. Conform to the specified AASHTO m aterials requirements for th e class of pipe specified except as follows: - Use concrete with 565 pounds or more cementitio us material pe r cubic yard. - The contractor may use cement conforming to 501.2.1 or may substitute for portl and cement a t the time of batching conforming to 501.2.6 for fly ash, 501.2.7 for slag, or 501.2.8 for other pozzolans. In either case the maximum total supplementary cementitious content is limited to 30 percent of the to tal cementitious content by weight.
4.Furnish an engineer-approved cold-applied bituminous mastic jo int sealer with a consistency that enables application to joints with a trowel if air temperatures range from 20 to 100 F.
608.2.2 Backfill 608.2.2.1 General
1.Furnish virgin materials consisting of either sand-sized particles or sand-sized particles mixed with gravel, crushed gravel, or crush ed stone. Do not use materials classified under 301.2.4.3 as crushed concrete, reclaimed asphalt, repr ocessed material, and blended material. The contractor may use material from the work site.
2.Ensure that the material provided has a liquid limit less than or equal to 25 and a plasticity index less than or equal to 6.
3.The department will sample and te st foundation a nd trench backfill according to the following: Sampling[1] ............................................................................................................................. ........... AASHTO T2 Percent passing t he 200 sieve ................................. ............................................................... ........ AASHTO T11 Gradation[1] ............................................................................................................................. ........ AASHTO T27 Liquid l imit .................................................. ............................................................... ...................... AASHT O T89 Plasticity index and plastic limit ............................ ............................................................... ........... AASHTO T90 [1] As modified in CMM 8-60.
Referenced in this section
Sections that cite this one
Riprap in other states
Get an email when 606 changes
Wisconsin 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: Wisconsin Standard Specifications for Highway and Structure Construction, 2019 Edition. Pages 344–345 of 601. View official source ↗