Specifications - State of Delaware

SECTION 232114 - OUTDOOR GEOTHERMAL PIPING: continued
e. The annular space between pipe and sleeve shall be sealed in accordance with
SECTION 079200 - JOINT SEALANTS.
2. Sleeves in Masonry and Concrete:
a. Provide steel standard weight or PVC standard weight pipe sleeves.
b. Pipes passing through concrete floors shall be provided with pipe sleeves fitted into
place at the time of construction.
2.03 BENTONITE GROUT:
A. Provide bentonite grout mixture for pressure grouting and sealing the bore hole of the vertical
well.
1. Provide grouting of wells in accordance with IGSHPA 21015.
2. The grout selected shall meet ANSI/NSF Standard 60.
3. The grout shall meet all local and state rules and regulations.
4. The bentonite will be a slurry that will be tremie grouted from the bottom of the boring to
the surface in accordance with the IGSHPA installation manual.
5. The contractor will work quickly to assure that there are no air voids forming as a result
of the bentonite placing.
B. Cementitious Thermally Enhanced Grout:
1. Provide cementitious thermally enhanced grout mixture:
a. The cementitious thermally enhanced grout mixture shall be a high solids sodium
bentonite grout with Portland cement, potable water, silica sand compound, and a
super plasticizer compound.
b. The grout shall be mixed per the manufacturer instructions.
c. Potable water shall be used for mixing the grout.
d. The thermal conductivity of the grout mixture compound shall be a minimum of
1.4 Btu/hr-ft-F or greater.
e. The target grout weight shall be 16 pounds/gallon.
PART 3 - EXECUTION
3.01 INSTALLATION:
A. As-Built Drawings:
1. As-Built Drawings of the installed systems: As-Built Drawings shall also show and
document the as-constructed locations of the well field with dimensions, including all
wells and loop fields.
3.02 ABOVEGROUND PIPING:
A. Provide above ground piping as specified in SECTION 232113 - HYDRONIC PIPING.
3.03 EARTHWORK:
A. Earthwork shall be performed in accordance with applicable provisions of SECTION 312000 -
EARTHMOVING, except that bentonite and thermally enhanced grouts shall be used where
indicated.
3.04 GROUND HEAT EXCHANGER PIPING:
A. Examine areas and conditions under which ground heat exchanger systems will be installed:
1. Prior to excavation, trenching, or drilling, locate and mark buried utilities.
2. Do not proceed with work until approved by the Contracting Officer.
3. Sharp bends and mitered joints shall not be used in piping.
DEAN232114.DOC 232114-5