DE NEEF® AC-400 chemical grout is a non-acrylamide acrylate monomer sealant designed for water control during tunnelling operations, for curtain grouting, and for excavatable soil consolidation in situations where low tensile and compressive strengths can be tolerated. AC-400 can also be used for controlling infiltration in mainline and lateral sewer joints.
- Non-acrylamide technology
- Pumps without modification to existing grouting acrylate / acrylamide equipment
- Extremely low viscosity grout (1-3 cPs)
- Very low permeability (5x10-9 cm/sec)
- Provided in liquid form (40% solids)
- No acrylamide powder batch mixing on jobsite
- Not flammable or explosive
- Water control in tunnelling
- Curtain grouting
- Soil support for excavation
- Mainline and lateral sewer grouting
- Geo-technical grouting
Warning: Consult the technical data sheets and safety data sheets before using.
A chemical grout will result from mixing the following components:
|GROUT TANK||DE NEEF® AC-400, water and TE-300|
|SP TANK||Water and SP-200|
When these components are properly mixed and brought together, the resulting chemical grout will form an impermeable, durable gel. The DE NEEF® AC-400 chemical grout has a variable gel time from 5 seconds to 1 hour to handle most sealing conditions.
GROUT TANK should first be filled with 12 gallons water, then 15 gallons (3 drums) of DE NEEF® AC-400 grout should be added. Add TE-300 and mix well.
SP TANK should be filled with 27.5 gallons water, then add SP-200 and mix well.
For geo-technical grouting applications:
The following typical formulation may be used in the field at 15º C (59º F) to give approximately 30 minutes gel time:
|DE NEEF® AC-400||30||147||15.0|
KF-500 is a retarder for DE NEEF® AC-400 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 0.5% KF-500 as shown above.
Other formulations are available for extended gel times. Contact DE NEEF® Technical Services.
For sewer sealing and curtain grouting applications:
The following typical formulation may be used in the field at 15ºC (59ºF) to give approximately 60 seconds gel time:
|DE NEEF® AC-400||30||147||15.0|
The following typical formulation may be used in the field at 15ºC (59ºF) to give approximately 20 seconds gel time:
|DE NEEF® AC-400||30||147||15.0|
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 day’s grouting.
Packaging & Handling
DE NEEF® AC-400 Grout is used with SP-200 (sodium persulfate) and TE-300 (triethanolamine). Available in 5 gallon drums (49 lbs). TE-300 and SP-200 are sold in several sizes.
Workers handling the grout must wear rubber gloves, goggles, and waterproof shoes. If the grout comes in contact with the skin, it should be washed off immediately with water. The grouting truck must be ventilated when mixing DE NEEF® AC-400 grout. Avoid breathing of the grout vapor. Use a blower and flexible duct to ventilate the bottom of manholes being grouted. Follow confined space entry and work procedures as required.
- 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 40⁰ F-80⁰ F.
- 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 UV, sunlight, and elevated temperatures above 85ºF will cause solidification of the product.
Health and Safety
Users must read and understand the product label and safety data sheet (SDS) for each system component before use. All users should acquaint themselves with this information prior to working with the material. Carefully read detailed precaution statements on the product label and SDSs before use. The most current SDSs can be obtained from the GCP website at gcpat.com or by contacting GCP toll free at 1-866 333-3726.
This product is not intended to fill large void spaces.
|DE NEEF® AC-400 acrylate resin|
|Appearance||Straw yellow liquid|
|Percent solids||39 – 41%|
|Boiling point||200 °F (93°C)|
|Solubility in water||100%|
|Toxicity||Very low toxicity (not certification program required)|
|DE NEEF® AC-400 solution|
|Viscosity||1 – 3 cPs|
|Density||8.6 lbs/gal (1.04 mg/ml)|
|pH||6.5 – 7.5|
|DE NEEF® AC-400 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 and controlled conditions. Reasonable variations from the data shown above may result.
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We hope the information here will be helpful. It is based on data and knowledge considered to be true and accurate, and is offered for consideration, investigation and verification by the user, but we do not warrant the results to be obtained. Please read all statements, recommendations, and suggestions in conjunction with our conditions of sale, which apply to all goods supplied by us. No statement, recommendation, or suggestion is intended for any use that would infringe any patent, copyright, or other third party right.
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This document is only current as of the last updated date stated below and is valid only for use in the United States. It is important that you always refer to the currently available information at the URL below to provide the most current product information at the time of use. Additional literature such as Contractor Manuals, Technical Bulletins, Detail Drawings and detailing recommendations and other relevant documents are also available on www.gcpat.com. Information found on other websites must not be relied upon, as they may not be up-to-date or applicable to the conditions in your location and we do not accept any responsibility for their content. If there are any conflicts or if you need more information, please contact GCP Customer Service.
Last Updated: 2023-06-28