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ADI-CON CW PLUS is a crystalline waterproofing admixture that is added directly to concrete at the time of batching to help reduce water penetration and enhance long-term durability. Once in the concrete, it reacts with cement hydration byproducts in the presence of moisture to form insoluble crystals within the pores and micro-cracks. This internal crystalline reaction reduces permeability and helps restrict water movement through the concrete matrix, even under continuous moisture exposure or water pressure. ADI-CON CW PLUS becomes an integral part of the concrete matrix and remains effective over the life of the concrete.
Commonly used in foundations, basements, water and wastewater structures, parking decks, tunnels, and other demanding applications, ADI-CON CW PLUS is intended for new construction where long-term resistance to water intrusion is important. By reducing water penetration, the product can also help limit durability issues related to freeze-thaw cycling and reinforcement corrosion. ADI-CON CW PLUS is compatible with cast-in-place, precast, and shotcrete concrete, and is added at the batch plant or directly into the ready-mix truck, helping streamline installation without changing typical construction practices.
Data Sheets
Product Data Sheet
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ADI-CON® CW PLUS
Crystalline Waterproofing Admixture for Concrete
DESCRIPTION
ADI-CON CW PLUS is a crystalline waterproofing admixture designed to enhance the durability and water resistance of concrete and cementitious materials. It uses proprietary crystalline technology that reacts with the byproducts of cement hydration in the presence of moisture, forming insoluble crystals within the concrete’s pore structure and micro-cracks. This process reduces the permeability of concrete and helps limit water ingress under hydrostatic conditions. ADI-CON CW PLUS becomes a permanent part of the concrete matrix and remains effective over time. The product provides active self-healing and waterproofing for the life of the concrete.
USES
ADI-CON CW PLUS is intended for use in new concrete construction, as it is added directly into the concrete mix at the time of batching. The product is designed for a wide range of structures where long-term resistance to water ingress and enhanced durability is important. ADI-CON CW PLUS will reduce the potential for freeze-thaw damage and corrosion of the concrete structure by reducing the amount of water penetration into the concrete. Typical applications include:
- Water and wastewater treatment facilities
- Reservoirs, foundations, basements, elevator pits
- Parking structures, tunnels, subway systems
- Marine structures, dams, power stations, secondary containment areas
- Bridge and decks
- Pools and fountains
ADI-CON CW PLUS is effective in both below-grade and water-retaining applications, and is compatible with cast-in-place, precast, and shotcrete concrete.
FEATURES/BENEFITS
- Low Permeability: Effective protection against hydrostatic head pressure up to 200 psi (462’) [(1.4 MPa (140.8 m) .
- Durability Enhancement: Protection against water penetration, chemicals, salts/chlorides, corrosion and freeze-thaw cycles.
- Simplified Construction: Easily added at the batch plant or directly into the ready-mix truck at the jobsite.
- Environmentally Friendly: Inorganic, 0 g/L VOC content.
PACKAGING
Available in various sizes and types of packaging, including water-soluble bags in boxes or pails. Contact W. R. MEADOWS for information on available sizes and packaging types.
SHELF LIFE
ADI-CON CW PLUS stored in a dry environment has a shelf life of one year in bags and two years in pails. When original wrapping of the pallet of mixer ready bags is opened, use within four months.
SPECIFICATIONS/STANDARDS
- ACI 212.3R-10, Chapter 15 for Permeability Reducing Admixtures: Hydrostatic Conditions (PRAH)
- ASTM C494, Type S
- AASHTO M 194, Type S
TECHNICAL DATA
| Materials Properties | |
| Appearence | Free-flowing, gray powder |
| Bulk Density, g/cm³ | 1.4 |
| pH | 12.78 |
| Chloride Content, % (BS EN 480-10:2009) |
<0.1 |
| VOC Content, g/L | 0 |
| Effect on Fresh Concrete Properties | ||
| Property | Test Method | Performance |
| Slump | ASTM C143/143M | Negligible effect; complies with ASTM C494, Type S |
| Air Content | ASTM C231/C231M | Negligible effect; complies with ASTM C494, Type S |
| Setting Time – Initial | ASTM C403/C403M | Negligible effect; complies with ASTM C494, Type S |
| Setting Time – Final | ASTM C403/C403M | Negligible effect; complies with ASTM C494, Type S |
| Effect on Hardened Concrete Properties | ||
| Property | Test Method | Performance |
| Compressive Strength | ASTM C39/39M | Equal or slightly higher than control |
| Flexural Strength | ASTM C78/C78M | Equal or slightly higher than control |
| Relative Durability Factor (300 Freeze-Thaw Cycles) |
ASTM C666/C666M | 98 % |
| Length change | ASTM C157/C157M | Exceeds the requirements of ASTM C494, Type S |
| Property, Test Standard |
Test Conditions | Results (Concrete with 2% by wt. of cement ADI-CON CW PLUS vs. Control) |
Performance Summary |
| Permeability, USACE CRD-C 48 |
200 psi (1.38 MPa); tested at AET |
0 vs. 4.68 x 10-13 ft/sec | 100% reduction in permeability; no flow observed |
| Depth of penetration, DIN 1048 |
72 psi (0.5 MPa) for 72 hrs; 28-day cure |
7.31 mm vs. 38.59 mm penetration | ≥ 81% reduction in water penetration depth |
APPLICATION
Dosage … 0.8 – 2.0% by weight of cementitious content. Contact W. R. MEADOWS for assistance with determining the proper dosage for your specific mix design and project conditions.
Application Method … ADI-CON CW PLUS is mixed with concrete or mortar at the time of batching. The procedure for adding the admixture will vary according to the type of batch plant operation and equipment. Contact W. R. MEADOWS for specific information regarding procedures in various batch plant operations. It is important to obtain a homogeneous mixture of ADI-CON CW PLUS with the concrete or mortar. ADI-CON CW PLUS is compatible with all cement types, supplementary cementitious materials (SCM), admixtures, and fibers.
Addition Methods
Truck Addition (at Plant) … Add ADI-CON CW PLUS (bulk powder or soluble bags) to the ready-mix truck drum immediately prior to batching or as close to batching as possible. To ensure proper dispersion of soluble bags, place bags as far forward in the drum as possible. When post-adding ADI-CON CW PLUS, mix for 7 – 10 minutes at high speed.
Central Mixer Addition … Add ADI-CON CW PLUS (bulk powder or soluble bags) directly to the central mixer with the other concrete components. Mix in accordance with standard batching practices to ensure uniform distribution.
Coarse Aggregate Belt Addition … Add ADI-CON CW PLUS (bulk powder or soluble bags) directly to the coarse aggregate conveyor belt, either manually or through a mass-batching system.
CONSIDERATIONS
Concrete structures must resist all structural and hydrostatic loads. Self-sealing is effective for static cracks. For dynamic cracks, use a flexible sealant. Use expansion joints for moving joints Utilize an appropriate waterstop system to maintain watertightness at joints and penetrations. Like standard concrete, concrete treated with ADI-CON CW PLUS can be used with membranes, sealers, paints, and tile grouts without compatibility issues. Follow all supplier installation, application instructions, and limitations of subsequent coatings or treatments.
LIMITATIONS/PRECAUTIONS
ADI-CON CW PLUS is a reactive material. It may either accelerate or retard the setting characteristics of concrete or mortar depending on the specific cement chemistry, mix design, water-to-cement ratio, and temperature. Therefore, it is necessary to evaluate the setting characteristics of specific concrete or mortar mix design prior to use. The required dosage will depend upon the application. It is the responsibility of the user to check with W. R. MEADOWS as to the suitability of this admixture in a given application.
Concrete must be designed, placed and cured in accordance with applicable codes and best concrete practices.
2026-01
