DE NEEF® Gelacryl SR

Acrylate Chemical Grout Resin

Product Description

DE NEEF® Gelacryl SR Chemical Grout is an acrylamide free acrylate monomer system designed to stop infiltration in mainline and lateral sewer joints. Its ultra low viscosity allows for penetration through leaking sewer pipe joints and into the surrounding soil. DE NEEF® Gelacryl SR’s low surface tension also make it effective for permeation grouting applications such as: tunneling operations, curtain grouting, and support of excavation.

Product Advantages

  • Acrylamide free
  • Pumps without modification to existing grouting equipment
  • Extremely low viscosity grout (1-3 cps)
  • Very low permeability (5x10-9 cm/sec)
  • Provided in liquid form (40% solids)
  • No dust toxicity hazard. 
  • Not flammable or explosive.

Product Applications

  • Mainline and lateral sewer grouting
  • Water control in tunneling
  • Curtain grouting
  • Soil support for excavation

Installation Guidelines

GROUT TANK DE NEEF® Gelacryl SR, TE-300
SP TANK SP-200 and water

When these components are properly mixed and brought together, the resulting chemical grout will form an impermeable, durable. The DE NEEF® Gelacryl SR chemical grout has a variable gel time from 5 seconds to 1 hour to handle most sealing conditions. The viscosity of a 12 percent solution of the chemical grout shall not be more than 1-3 cps depending on temperature.

Mixing Instructions

GROUT TANK should first be filled with 15 gallons water, then 15 gallons (3 drums) of DE NEEF® Gelacryl SR should be added. Add 1 gal (one jug=1 gal= 10 lbs) of TE-300. Mix well.

SP TANK should be filled with 30 gallons water, then add 10 lbs. SP-200 (1 pail= 10 lbs). Mix well.

CAUTION: DE NEEF® Gelacryl SR Acrylate Chemical Grout, TE-300 (Triethanolamine) and SP- 200 (Sodium Persulfate) are toxic. Workers handling these chemicals must wear rubber gloves, goggles and waterproof shoes.

TYPICAL FORMULATIONS:

For Sewer Sealing Applications

The following typical formulations may be used in the field at 15ºC (59ºF) to give approximately 60 seconds gel time:

GROUT TANK POUNDS GALLONS
Water 47 5.64
DE NEEF® Gelacryl SR (40% solution) 55 5.64
TE-300 Triethanolamine (85%) 1.8 23 oz
SP Tank    
Water 96 11.5
SP-200 Sodium Persulfate 1.8  
Total 200 22.8

The following typical formulation may be used in the field at 15ºC (59ºF) to give approximately 20 seconds gel time:

GROUT TANK POUNDS GALLONS
Water 47 5.64
DE NEEF® Gelacryl SR (40% solution) 55 5.64
TE-300 Triethanolamine (85%) 3.7 47 oz
SP Tank    
Water 97 11.7
SP-200 Sodium Persulfate 3.7  
Total 206 23.3

Set times will vary depending on temperature and humidity. Always preform a cup test to determine the actual gel time of each mixed batch. Additional SP-200 may be added to shorten the gel time. If grout is left in tank overnight, always perform a new cup test before beginning next days grouting.

For Curtain Grouting Applications

The following typical formulation may be used in the field at 15ºC (59ºF) to give approximately 30 minutes gel time

GROUT TANK WT% POUNDS GALLONS
Water 19 95 11.5
DE NEEF® Gelacryl SR (40% solution) 30 148 15.1
TE-300 Triethanolamine (85%) 0.5 2.5 0.25
KF-500 Potassium Ferricyanide (10% Solution) 0.5 2.5 0.30
SP Tank      
Water 49.5 245.2 29.7
SP-200 Sodium Persulfate 0.5 2.5  
Total 100.0 495.7 56.9

KF-500 is a retarder for DE NEEF® Gelacryl SR grouting applications. It is packaged as 4 oz. of Potassium Ferricyanide powder, which should be diluted with 36 ounces water to make a 10% solution. The solution as mixed provides 0.46% KF-500 as shown in the Curtain Grouting Application above.

Other formulations are available for extended gel times. Contact DE NEEF® Technical Services.

Packaging & Handling

Gelacryl SR is used with SP-200 (sodium persulfate) and TE-300 (triethanolamine).

Available in 5.6 gallon drums (55lbs) Sold as a kit with 28 oz. TE-300 and 2 lbs SP-200.

Health and Safety

Always use protective clothing, gloves and goggles consistent with OSHA regulations during use. Avoid eye and skin contact. Do not ingest. Refer to Safety Data Sheet for detailed safety precautions.

DE NEEF® Gelacryl SR Grout consists of a mixture of low toxicity acrylate monomers with a small amount of methylenebisacrylamide (MBA) cross linker which is not neurotoxic.

DE NEEF® Gelacryl SR Acrylate Grout is not neurotoxic and does not present a dust toxicity hazard.

DE NEEF® Gelacryl SR exhibits only 1/100 the toxic exposure of acrylamide grout; however, basic safety procedures must be used when handling the grout. Workers handling the grout must wear rubber gloves, goggles and waterproof shoes. If the grout comes in contact with the with the skin, it should be washed off immediately with water.

Limitations

This product is not intended to fill large void spaces.

The grouting truck must be ventilated when mixing DE NEEF® Gelacryl SR Grout. Avoid prolonged breathing of the grout vapor. Use a blower and flexible duct to ventilate the bottom of manholes being grouted. In case of contact with the eyes, flush with water for 15 minutes. If swallowed, call a physician immediately. DE NEEF® Gelacryl SR Acrylate Grout is not neurotoxic and does not present a dust toxicity hazard.

Read all SDS before using this product. In the event of an EMERGENCY call: CHEMTREC 800-424-9300.

Properties

DE NEEF® GELACRYL SR RESIN  
Appearance Straw yellow liquid
Density 9.8 lbs/gal
Percent solids 39-41%
Specific Gravity 1.2
Boiling Point 200ºF (93ºC)
Solubility in water 100%
Toxicity Very low toxicity (no certification program required)
Acute Oral Toxicity LD50, 5000 mg/kg
DE NEEF® GELACRYL SR SOLUTION  
Viscosity 1-3 cps
Density 8.6 lbs/gal (1.04 mg/ml)
pH 6.5-7.5
Stability 3 days catalyzed
DE NEEF® GELACRYL SR CURED
Appearance: White, flexible gel
Solubility: Insoluble in water, kerosene, gasoline, Gel swells slightly in presence of water
Permeability: Substantially impermeable to water (5x10-9 cm/sec) Stable in 100% humidity. Can dehydrate in dry conditions
Chemical Resistance; Resistant against bacteria, fungi, and chemicals found in sewer systems

Note: The data shown above reflects typical results based on laboratory testing under controlled conditions. Reasonable variations from the data shown above may result.

WARNINGS:

  • Do not let SP-200 and TE-300 come into contact with each other prior to field mixing. The reaction is exothermic (heat producing) and may cause fire.
  • Store SP-200 and TE-300 separated from each other, at 40⁰F to 80⁰F.
  • TE-300 and SP-200 are incompatible with aluminum. Do not use aluminum equipment in the presence of TE-300 and SP-200
  • Prolonged exposure to U.V., sunlight and elevated temperatures above 85ºF, will cause solidification of the product.