800-106c. Grouting Holes. Mix, apply and cure the grout according to the manufacturer’s instructions. Fill the

KS · 2015 Standard SpecificationsBook pages 597–600View official source ↗

842 - DRILLING AND GROUTING apply and cure the grout according to the manufacturer’s instructions. Fill the dry, clean holes with an approved grout. Insert the bolt, ba r or reinforcing steel into the freshly grouted hole so that no voids exist between the bolt, bar or reinforcing steel and the concrete. Clean overflow and center the bar or bolt in the hole.

d.Testing. When designated in the Contract Documents, proof load 20% of the installed anchorages to

90% of the design load according to the procedures in the C ontract Documents.

842.4MEASUREMENT AND PAYMENT

The Engineer will not measure the dr illing and grouting of bars and bolts that are included in other items of work (such as the erection of structural steel and concrete pavement patching). When shown as a bid item in the contract, the Engineer will measure each drilled and grouted hole. Payment for "Drilling and Grouting" at the contract unit price, and "Drilling and Grouting (Repair) (Set Price) at the contract unit set price, is full compensation for the specified work. 843 - FLOWABLE FILL

800-107SECTION 843

FLOWABLE FILL

843.1DESCRIPTION

Backfill the designated structures or excavations with flowable fill.

B I D I T E M U N I T S F l o w a b l e F i l l ( * ) C u b i c Y a r d *Low Strength or High Strength

843.2MATERIALS

a.General. Provide materials that comply with the applicable requirements.

Fine Aggr egate ...................................................................................................... DIVISION 1100 Cement and Fly Ash (approved for stabilization & cold recycle) ......................... DIVISION 2000 Water ..................................................................................................................... DIVISION 2400

The Engineer will approve the use of admixtures to achieve flowability and acceptable set time, based on performance.

b.Mix Design. Design a flowable fill mixture that possesses adequate flow characteris tics to fill all voids,

and complies with the compressive strength and unit weight requirements shown in TABLE 843-1 . TABLE 843-1: REQUIREMENTS FOR FLOWABLE FILL MIXTURE LOW-STRENGTH MIXTURE HIGH-STRENGTH MIXTURE 3 Day Compressive Strength (minimum) 20 psi - 7 Day Compressive Strength (minimum) - 50 psi 28 Day Compressive Strength 100 psi (max) 1500 psi Unit Weight (maximum) 120 pcf - Obtain approval from the District Materials Engineer for the job mixture. Supply 3 and 28 day compressive strength information for low-strength mixtures, or 7 and 28 day compressive strength information for high-strength mixtures, along with the mix design.

c.KDOT Assurance and Acceptance. The Engineer will make test cy linders for each 100 cubic yards of

flowable fill placed, and whenever th e mixture is changed. The cylinders will be made and tested according to

DIVISION 2500 .

 For the low-strength mixture, 3 cylinders will be made. The 1st cylinder will be tested on the 3rd day. The 2nd cylinder will be laboratory cured and tested on the 28th day. The 3rd cylinder will be laboratory cured and held in reserve to verify any questionable cylinder breaks.  For the high-strength mixture, 3 cylinders will be made. The 1st cylinder will be tested on the 7th day. The 2nd cylinder will be laboratory cured and tested on the 28th day. The 3rd cylinder will be laboratory cured and held in reserve to verify any questionable cylinder breaks.  The Engineer will test the unit weight a minimum of every 50 cubic yards of flowable fill placed.  The Engineer will accept the flowable fill based on the results of the compressive strength and unit weight tests, and visual inspection of the mixture placed on the project.

843.3CONSTRUCTION REQUIREMENTS

Place the flowable fill in the excavation so all voids around the structure or in the excavation are filled. Place the flowable fill around structures in lifts preventing the buildup of excess hydrostatic pressure. Observe the weather lim itations specified in DIVISION 400 when placing the flowable fill.

843.4MEASUREMENT AND PAYMENT

The Engineer will measure flowable fill placed in the specif ied locations by the cubic yard. Payment for "Flowable Fill" at the contract unit price is full compensation for the specified work. 844 - SLURRY GROUT

800-108SECTION 844

SLURRY GROUT

844.1DESCRIPTION

Fill cavities of existing structures, mines or voids under pavements and slabs on grade with a slurry grout as shown in the Contract Documents.

B I D I T E M U N I T S Slurry Grout (*) Cubic Yard * Low Strength, High Strength or Underseal

844.2MATERIALS

a.Materials. Provide materials that comply w ith the applicable requirements.

The Engineer will approve the use of admixtures to achieve flowability and acceptable set time, based on performance. Provide foaming agents approved by the Engineer.

b.Approval of Mix Design. Design a slurry grout that complies with TABLE 844-1 .

TABLE 844-1: REQUIREMENTS FOR SLURRY GROUT MIXTURE LOW-STRENGTH MIXTURE HIGH-STRENGTH MIXTURE UNDERSEALING MIXTURE 3 Day Compressive Strength (minimum) 20 psi - 100 psi 7 Day Compressive Strength (minimum) - 125 psi 600 psi 28 Day Compressive Strength 100 psi (max.) 200 psi (min.) Unit Weight (minimum) 92 lbs/cu. ft. Flow, seconds (ASTM C939) 10 - 16

Submit the slurry grout mix design and results of th e required compressive strength testing (conducted by a testing laboratory) to the DME for approval. The DME will approve or reject the mix design within 2 weeks of the submittal.

c.KDOT Assurance and Acceptance. The Engineer will make a set of test cylinders for each 100 cubic

yards of slurry grout placed on the proj ect, and when the mix design or source of fly ash is changed. The Engineer will make and test the cylinders according to DIVISION 2500 . The Engineer will make a set of 3 cylinders for each 100 cubic yards produced.  For underseal mixture, test the 1 st cylinder on the 3rd day  For low strength, test the 1st cylinder on the 3rd day  For high-strength mixture, test the 1st cylinder on the 7th day  The Engineer will laboratory cure the remaining 2 cylinders.  For underseal mixture, test the 2nd cylinder on the 7th day  For low and high strength mixture, test the 2nd cylinder on the 28th day  The Engineer will hold the 3rd cylinder in reserve to verify any questionable cylinder breaks.

The Engineer will test the unit weight a minimum of every 50 cubic yards of sl urry grout placed on the project. The Engineer will test the flow of the underseal slurry grout 2 times per day. The ratio of the water to cementitious material will be adjusted to comply with the requirements. 844 - SLURRY GROUT

800-109The Engineer will accept the slurry grout based on the results of the comp ressive strength, unit weight tests,

and visual inspection of the mixture placed on the project.

844.3CONSTRUCTION REQUIREMENTS

Pump the slurry grout into the structures to fill all the voids. Bulkhead each end of the structure to be filled. Provide a minimum of 2 vent pipes to monitor the pumping. If necessary to fill the structure, pump additional grout through the vent pipes. If filling voids under pavements and slabs on grade, place the slurry grout as shown on the Contract Documents. Observe the weather lim itations specified in DIVISION 400 when placing the slurry grout.

844.4MEASUREMENT AND PAYMENT

The Engineer will measure slurry grout by the cubic yard. Payment for "Slurry Grout" at the contract unit price is full compensation for the specified work.

Source: Kansas Standard Specifications for State Road and Bridge Construction, 2015 Edition. Pages 597–600 of 978.

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800-95 Rout all the cracks that are ⅛ to ½ inch wide following the existing crack. Route cracks ⅛ to ⅜ inch with a ⅝

800-109 The Engineer will accept the slurry grout based on the results of the comp ressive strength, unit weight tests,