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<br />PGSF WMVD Storm and Combined Sewer - Construction Package 2 Injection Grouting <br />Project No. 180162 03 64 00 - 4 <br /> <br />2. The ability to tolerate some dilution and react in moving water during injection. <br />3. A viscosity of approximately 2 centipoises, which can be increased with additives. <br />4. A constant viscosity during the reaction period. <br />5. A controllable reaction time from 10 seconds to 1 hour. <br />6. A reaction (curing) that produces a homogenous, chemically stable, non- <br />biodegradable, firm, flexible gel. <br />7. The ability to increase mix viscosity, density, and gel strength using additives. <br />8. Accepted Product Manufacturers: <br />a. Avanti AV-100. <br />b. Avanti AV-118, <br />c. DeNeef AC-400, <br />d. or Approved Equal. <br />2.03 ADDITIVES <br />A. Latex additive (or equal) to strengthen the grout, provide protection against shrinkage, <br />and improve the strength of the gel. The quantity of latex additive will be according to the <br />manufacturer recommendation. Adjust the grout admixture to meet specified viscosity <br />and reaction time. Follow manufacturer’s recommendations for product handling and <br />storing. Latex additive shall not contain organic solvents and shall have the following <br />characteristics. <br /> <br />Solids Content 49% minimum ASTM D-1010 <br />pH 7.5-8.5 8.0 Average <br />Viscosity 130 cps @ 77°F ASTM D-1638 <br />Density 8.52 lbs./gal. ASTM D-1564W <br />Solvent Water <br />B. A root deterrent chemical such as dichlobenil to the grout in proportions as <br />recommended by the manufacturer. <br />C. A shrink control agent that is a water-based emulsion with the grout. The shrink control <br />agent shall reduce shrinkage and improve strength of the grout providing the resultant <br />cured material with both improved hydrostatic pressure resistance and flexibility. The <br />agent shall be added in proportions as recommended by the manufacturer. The use of <br />anti-freeze or other agent that is not specifically recommended by the manufacturer is <br />prohibited. Product shall be Avanti AV-257 or approved equal. <br />D. Add gel time extending agent in accordance with the Manufacturer’s recommendations <br />to extend gel time, as necessary. Product shall be potassium ferricyanide (KFe), or equal.